onchaincheck is answering right now. Last checked moments ago. It exposes 106 tools.
100+ pay-per-call tools: token risk, wallet sanctions screening, onchain data, web, company, AI
Uptime history
31 hours of history
31 hours agonow
100.0%
Uptime 24h
92 of 92 checks
106
Tools
read from the server
401 ms
Response time
average over 24h
open, no key
Access
streamable-http
Nothing serious here today
Today is the operative word: we check onchaincheck every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
Connect this server
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 0 min ago.
run in your terminal
claude mcp add onchaincheck --transport http https://onchaincheck.dev/mcpSettings → Connectors → Add custom connector, then paste this address
https://onchaincheck.dev/mcp~/.codex/config.toml
[mcp_servers.onchaincheck]
url = "https://onchaincheck.dev/mcp".cursor/mcp.json
{
"mcpServers": {
"onchaincheck": {
"url": "https://onchaincheck.dev/mcp"
}
}
}.vscode/mcp.json
{
"servers": {
"onchaincheck": {
"type": "http",
"url": "https://onchaincheck.dev/mcp"
}
}
}Available tools 106
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
base
base_contract_info
Identify what lives at a Base address: wallet (EOA, including EIP-7702 delegation) or contract, which token standard it implements (ERC-20, ERC-721, ERC-1155), name and symbol, upgradeable-proxy implementation and admin, smart-wallet proxies, bytecode size, nonce and ETH balance. Costs $0.005 USDC on Base via x402.
base_erc20_allowance
ERC-20 allowance on Base: how much a spender may transfer from an owner, whether the approval is effectively unlimited, the owner's balance, and the amount the spender could move right now. Costs $0.005 USDC on Base via x402.
base_gas_prices
Current Base gas conditions: block number, base fee, gas price and priority fee in gwei, and the estimated cost in ETH and USD of a native transfer and an ERC-20 transfer (Chainlink ETH/USD); plus how the current price ranks against our own samples every 10 minutes over the last 7 days, and the usually cheapest UTC hour. Costs $0.005 USDC on Base via x402.
base_large_trades
Whale and large-trade tracker for an ERC-20 on Base: every buy and sell in the last N minutes on the token's deepest WETH/USDC pools (Uniswap v3 or Aerodrome), with USD size, side, wallet and transaction for the largest trades, buy/sell volume and net flow, and the wallets that bought or sold the most; plus the token's launch from our history (first-sight risk score, liquidity after 24 h/7 d/30 d, deployer record) when we recorded it. Costs $0.02 USDC on Base via x402.
base_new_pools
New trading pools created on Base in the last N minutes on Uniswap v4, Uniswap v2, Uniswap v3 or Aerodrome: both tokens with symbol, name and decimals, fee tier, v4 hooks, whether it pairs with ETH, WETH or USDC, and quote liquidity where readable; plus, from our launch history, each pool's first-sight risk score and how many new pools on its venue lost their liquidity within 24 h. Unvetted: many new pools are spam. Costs $0.01 USDC on Base via x402.
base_nft_metadata
Metadata for an ERC-721 or ERC-1155 token on Base: collection name, current owner (ERC-721), token URI, and the metadata JSON fetched and decoded from IPFS, Arweave, HTTPS or an inline data URI, with a browser-loadable image URL. Costs $0.008 USDC on Base via x402.
base_resolve_basename
Resolve a Basename (name.base.eth) to its Base address and profile records (avatar, description, url, Twitter, GitHub). Accepts "jesse", "jesse.base" or "jesse.base.eth". Costs $0.005 USDC on Base via x402.
base_token_snapshot
Rug check and due-diligence snapshot of an ERC-20 token on Base: a 0-100 risk score with reasons, name, symbol, decimals, supply, owner and whether ownership is renounced, upgradeable-proxy detection, owner-only functions found in the bytecode (mint, pause, blacklist, fee changes), and USD price, liquidity and FDV from the deepest WETH or USDC pool on Uniswap v3 or Aerodrome. Facts only, no buy or sell opinion. Costs $0.01 USDC on Base via x402.
base_transaction_summary
Human-readable summary of a Base transaction: status, block and time, sender and recipient, ETH value, gas used and fee, method selector, and decoded ERC-20 transfers with token symbols and amounts. Costs $0.005 USDC on Base via x402.
base_wallet_balances
Native ETH balance of a Base wallet plus the balances of up to 20 ERC-20 tokens you list, formatted with each token's symbol and decimals, read live from Base. Costs $0.005 USDC on Base via x402.
base_wallet_profile
Who is this Base address? Wallet age (first transfer), first funder, contract or EOA, ETH balance and nonce, the latest transfers in and out (native, ERC-20, NFTs), top counterparties by count, and recent large transfers in USD (ETH, WETH, USDC, USDT), from Alchemy's transfer index; plus, from our launch history, tokens it deployed and how many lost their liquidity, and deployers it funded. Costs $0.01 USDC on Base via x402.
eth
eth_contract_info
Identify what lives at a Ethereum address: wallet (EOA, including EIP-7702 delegation) or contract, which token standard it implements (ERC-20, ERC-721, ERC-1155), name and symbol, upgradeable-proxy implementation and admin, smart-wallet proxies, bytecode size, nonce and ETH balance. Costs $0.005 USDC on Base via x402.
eth_erc20_allowance
ERC-20 allowance on Ethereum: how much a spender may transfer from an owner, whether the approval is effectively unlimited, the owner's balance, and the amount the spender could move right now. Costs $0.005 USDC on Base via x402.
eth_gas_prices
Current Ethereum gas conditions: block number, base fee, gas price and priority fee in gwei, and the estimated cost in ETH and USD of a native transfer and an ERC-20 transfer (Chainlink ETH/USD); plus how the current price ranks against our own samples every 10 minutes over the last 7 days, and the usually cheapest UTC hour. Costs $0.005 USDC on Base via x402.
eth_large_trades
Whale and large-trade tracker for an ERC-20 on Ethereum: every buy and sell in the last N minutes on the token's deepest WETH/USDC pools (Uniswap v3), with USD size, side, wallet and transaction for the largest trades, buy/sell volume and net flow, and the wallets that bought or sold the most; plus the token's launch from our history (first-sight risk score, liquidity after 24 h/7 d/30 d, deployer record) when we recorded it. Costs $0.02 USDC on Base via x402.
eth_new_pools
New trading pools created on Ethereum in the last N minutes on Uniswap v4, Uniswap v2, Uniswap v3: both tokens with symbol, name and decimals, fee tier, v4 hooks, whether it pairs with ETH, WETH or USDC, and quote liquidity where readable; plus, from our launch history, each pool's first-sight risk score and how many new pools on its venue lost their liquidity within 24 h. Unvetted: many new pools are spam. Costs $0.01 USDC on Base via x402.
eth_nft_metadata
Metadata for an ERC-721 or ERC-1155 token on Ethereum: collection name, current owner (ERC-721), token URI, and the metadata JSON fetched and decoded from IPFS, Arweave, HTTPS or an inline data URI, with a browser-loadable image URL. Costs $0.008 USDC on Base via x402.
eth_resolve_ens
ENS on Ethereum: resolve a name (vitalik.eth) to its address and profile records (avatar, description, url, Twitter, GitHub), or pass an address instead to get its primary ENS name. Uses ENS's universal resolver. Costs $0.005 USDC on Base via x402.
eth_token_snapshot
Rug check and due-diligence snapshot of an ERC-20 token on Ethereum: a 0-100 risk score with reasons, name, symbol, decimals, supply, owner and whether ownership is renounced, upgradeable-proxy detection, owner-only functions found in the bytecode (mint, pause, blacklist, fee changes), and USD price, liquidity and FDV from the deepest WETH or USDC pool on Uniswap v3. Facts only, no buy or sell opinion. Costs $0.01 USDC on Base via x402.
eth_transaction_summary
Human-readable summary of a Ethereum transaction: status, block and time, sender and recipient, ETH value, gas used and fee, method selector, and decoded ERC-20 transfers with token symbols and amounts. Costs $0.005 USDC on Base via x402.
eth_wallet_balances
Native ETH balance of a Ethereum wallet plus the balances of up to 20 ERC-20 tokens you list, formatted with each token's symbol and decimals, read live from Ethereum. Costs $0.005 USDC on Base via x402.
eth_wallet_profile
Who is this Ethereum address? Wallet age (first transfer), first funder, contract or EOA, ETH balance and nonce, the latest transfers in and out (native, ERC-20, NFTs), top counterparties by count, and recent large transfers in USD (ETH, WETH, USDC, USDT), from Alchemy's transfer index; plus, from our launch history, tokens it deployed and how many lost their liquidity, and deployers it funded. Costs $0.01 USDC on Base via x402.
arbitrum
arbitrum_contract_info
Identify what lives at a Arbitrum One address: wallet (EOA, including EIP-7702 delegation) or contract, which token standard it implements (ERC-20, ERC-721, ERC-1155), name and symbol, upgradeable-proxy implementation and admin, smart-wallet proxies, bytecode size, nonce and ETH balance. Costs $0.005 USDC on Base via x402.
arbitrum_erc20_allowance
ERC-20 allowance on Arbitrum One: how much a spender may transfer from an owner, whether the approval is effectively unlimited, the owner's balance, and the amount the spender could move right now. Costs $0.005 USDC on Base via x402.
arbitrum_gas_prices
Current Arbitrum One gas conditions: block number, base fee, gas price and priority fee in gwei, and the estimated cost in ETH and USD of a native transfer and an ERC-20 transfer (Chainlink ETH/USD); plus how the current price ranks against our own samples every 10 minutes over the last 7 days, and the usually cheapest UTC hour. Costs $0.005 USDC on Base via x402.
arbitrum_large_trades
Whale and large-trade tracker for an ERC-20 on Arbitrum One: every buy and sell in the last N minutes on the token's deepest WETH/USDC pools (Uniswap v3), with USD size, side, wallet and transaction for the largest trades, buy/sell volume and net flow, and the wallets that bought or sold the most; plus the token's launch from our history (first-sight risk score, liquidity after 24 h/7 d/30 d, deployer record) when we recorded it. Costs $0.02 USDC on Base via x402.
arbitrum_new_pools
New trading pools created on Arbitrum One in the last N minutes on Uniswap v4, Uniswap v2, Uniswap v3: both tokens with symbol, name and decimals, fee tier, v4 hooks, whether it pairs with ETH, WETH or USDC, and quote liquidity where readable; plus, from our launch history, each pool's first-sight risk score and how many new pools on its venue lost their liquidity within 24 h. Unvetted: many new pools are spam. Costs $0.01 USDC on Base via x402.
arbitrum_nft_metadata
Metadata for an ERC-721 or ERC-1155 token on Arbitrum One: collection name, current owner (ERC-721), token URI, and the metadata JSON fetched and decoded from IPFS, Arweave, HTTPS or an inline data URI, with a browser-loadable image URL. Costs $0.008 USDC on Base via x402.
arbitrum_token_snapshot
Rug check and due-diligence snapshot of an ERC-20 token on Arbitrum One: a 0-100 risk score with reasons, name, symbol, decimals, supply, owner and whether ownership is renounced, upgradeable-proxy detection, owner-only functions found in the bytecode (mint, pause, blacklist, fee changes), and USD price, liquidity and FDV from the deepest WETH or USDC pool on Uniswap v3. Facts only, no buy or sell opinion. Costs $0.01 USDC on Base via x402.
arbitrum_transaction_summary
Human-readable summary of a Arbitrum One transaction: status, block and time, sender and recipient, ETH value, gas used and fee, method selector, and decoded ERC-20 transfers with token symbols and amounts. Costs $0.005 USDC on Base via x402.
arbitrum_wallet_balances
Native ETH balance of a Arbitrum One wallet plus the balances of up to 20 ERC-20 tokens you list, formatted with each token's symbol and decimals, read live from Arbitrum One. Costs $0.005 USDC on Base via x402.
arbitrum_wallet_profile
Who is this Arbitrum One address? Wallet age (first transfer), first funder, contract or EOA, ETH balance and nonce, the latest transfers in and out (native, ERC-20, NFTs), top counterparties by count, and recent large transfers in USD (ETH, WETH, USDC, USDT), from Alchemy's transfer index; plus, from our launch history, tokens it deployed and how many lost their liquidity, and deployers it funded. Costs $0.01 USDC on Base via x402.
optimism
optimism_contract_info
Identify what lives at a OP Mainnet address: wallet (EOA, including EIP-7702 delegation) or contract, which token standard it implements (ERC-20, ERC-721, ERC-1155), name and symbol, upgradeable-proxy implementation and admin, smart-wallet proxies, bytecode size, nonce and ETH balance. Costs $0.005 USDC on Base via x402.
optimism_erc20_allowance
ERC-20 allowance on OP Mainnet: how much a spender may transfer from an owner, whether the approval is effectively unlimited, the owner's balance, and the amount the spender could move right now. Costs $0.005 USDC on Base via x402.
optimism_gas_prices
Current OP Mainnet gas conditions: block number, base fee, gas price and priority fee in gwei, and the estimated cost in ETH and USD of a native transfer and an ERC-20 transfer (Chainlink ETH/USD); plus how the current price ranks against our own samples every 10 minutes over the last 7 days, and the usually cheapest UTC hour. Costs $0.005 USDC on Base via x402.
optimism_large_trades
Whale and large-trade tracker for an ERC-20 on OP Mainnet: every buy and sell in the last N minutes on the token's deepest WETH/USDC pools (Uniswap v3 or Velodrome), with USD size, side, wallet and transaction for the largest trades, buy/sell volume and net flow, and the wallets that bought or sold the most; plus the token's launch from our history (first-sight risk score, liquidity after 24 h/7 d/30 d, deployer record) when we recorded it. Costs $0.02 USDC on Base via x402.
optimism_new_pools
New trading pools created on OP Mainnet in the last N minutes on Uniswap v4, Uniswap v2, Uniswap v3 or Velodrome: both tokens with symbol, name and decimals, fee tier, v4 hooks, whether it pairs with ETH, WETH or USDC, and quote liquidity where readable; plus, from our launch history, each pool's first-sight risk score and how many new pools on its venue lost their liquidity within 24 h. Unvetted: many new pools are spam. Costs $0.01 USDC on Base via x402.
optimism_nft_metadata
Metadata for an ERC-721 or ERC-1155 token on OP Mainnet: collection name, current owner (ERC-721), token URI, and the metadata JSON fetched and decoded from IPFS, Arweave, HTTPS or an inline data URI, with a browser-loadable image URL. Costs $0.008 USDC on Base via x402.
optimism_token_snapshot
Rug check and due-diligence snapshot of an ERC-20 token on OP Mainnet: a 0-100 risk score with reasons, name, symbol, decimals, supply, owner and whether ownership is renounced, upgradeable-proxy detection, owner-only functions found in the bytecode (mint, pause, blacklist, fee changes), and USD price, liquidity and FDV from the deepest WETH or USDC pool on Uniswap v3 or Velodrome. Facts only, no buy or sell opinion. Costs $0.01 USDC on Base via x402.
optimism_transaction_summary
Human-readable summary of a OP Mainnet transaction: status, block and time, sender and recipient, ETH value, gas used and fee, method selector, and decoded ERC-20 transfers with token symbols and amounts. Costs $0.005 USDC on Base via x402.
optimism_wallet_balances
Native ETH balance of a OP Mainnet wallet plus the balances of up to 20 ERC-20 tokens you list, formatted with each token's symbol and decimals, read live from OP Mainnet. Costs $0.005 USDC on Base via x402.
optimism_wallet_profile
Who is this OP Mainnet address? Wallet age (first transfer), first funder, contract or EOA, ETH balance and nonce, the latest transfers in and out (native, ERC-20, NFTs), top counterparties by count, and recent large transfers in USD (ETH, WETH, USDC, USDT), from Alchemy's transfer index; plus, from our launch history, tokens it deployed and how many lost their liquidity, and deployers it funded. Costs $0.01 USDC on Base via x402.
polygon
polygon_contract_info
Identify what lives at a Polygon PoS address: wallet (EOA, including EIP-7702 delegation) or contract, which token standard it implements (ERC-20, ERC-721, ERC-1155), name and symbol, upgradeable-proxy implementation and admin, smart-wallet proxies, bytecode size, nonce and POL balance. Costs $0.005 USDC on Base via x402.
polygon_erc20_allowance
ERC-20 allowance on Polygon PoS: how much a spender may transfer from an owner, whether the approval is effectively unlimited, the owner's balance, and the amount the spender could move right now. Costs $0.005 USDC on Base via x402.
polygon_gas_prices
Current Polygon PoS gas conditions: block number, base fee, gas price and priority fee in gwei, and the estimated cost in POL and USD of a native transfer and an ERC-20 transfer (Chainlink POL/USD); plus how the current price ranks against our own samples every 10 minutes over the last 7 days, and the usually cheapest UTC hour. Costs $0.005 USDC on Base via x402.
polygon_large_trades
Whale and large-trade tracker for an ERC-20 on Polygon PoS: every buy and sell in the last N minutes on the token's deepest WPOL/USDC pools (Uniswap v3), with USD size, side, wallet and transaction for the largest trades, buy/sell volume and net flow, and the wallets that bought or sold the most; plus the token's launch from our history (first-sight risk score, liquidity after 24 h/7 d/30 d, deployer record) when we recorded it. Costs $0.02 USDC on Base via x402.
polygon_new_pools
New trading pools created on Polygon PoS in the last N minutes on Uniswap v4, Uniswap v2, Uniswap v3: both tokens with symbol, name and decimals, fee tier, v4 hooks, whether it pairs with POL, WPOL or USDC, and quote liquidity where readable; plus, from our launch history, each pool's first-sight risk score and how many new pools on its venue lost their liquidity within 24 h. Unvetted: many new pools are spam. Costs $0.01 USDC on Base via x402.
polygon_nft_metadata
Metadata for an ERC-721 or ERC-1155 token on Polygon PoS: collection name, current owner (ERC-721), token URI, and the metadata JSON fetched and decoded from IPFS, Arweave, HTTPS or an inline data URI, with a browser-loadable image URL. Costs $0.008 USDC on Base via x402.
polygon_token_snapshot
Rug check and due-diligence snapshot of an ERC-20 token on Polygon PoS: a 0-100 risk score with reasons, name, symbol, decimals, supply, owner and whether ownership is renounced, upgradeable-proxy detection, owner-only functions found in the bytecode (mint, pause, blacklist, fee changes), and USD price, liquidity and FDV from the deepest WPOL or USDC pool on Uniswap v3. Facts only, no buy or sell opinion. Costs $0.01 USDC on Base via x402.
polygon_transaction_summary
Human-readable summary of a Polygon PoS transaction: status, block and time, sender and recipient, POL value, gas used and fee, method selector, and decoded ERC-20 transfers with token symbols and amounts. Costs $0.005 USDC on Base via x402.
polygon_wallet_balances
Native POL balance of a Polygon PoS wallet plus the balances of up to 20 ERC-20 tokens you list, formatted with each token's symbol and decimals, read live from Polygon PoS. Costs $0.005 USDC on Base via x402.
polygon_wallet_profile
Who is this Polygon PoS address? Wallet age (first transfer), first funder, contract or EOA, POL balance and nonce, the latest transfers in and out (native, ERC-20, NFTs), top counterparties by count, and recent large transfers in USD (POL, WPOL, USDC, USDT), from Alchemy's transfer index; plus, from our launch history, tokens it deployed and how many lost their liquidity, and deployers it funded. Costs $0.01 USDC on Base via x402.
company
company_enrich
Company enrichment from a domain: name, description, logo, founded, headquarters, country, industry, employee count, ticker, founders, CEO and parent (Wikidata), social profiles and contact links (homepage), tech stack, mail provider, domain age, careers page and open job count from ~20,000 indexed job boards. Repeat lookups list what changed since the previous check. Costs $0.01 USDC on Base via x402.
company_hiring_trend
Is a company growing or cutting? Hiring trend from our recorded history of every posting added and removed on its public job board (Greenhouse, Lever, Ashby, Workable, SmartRecruiters, Recruitee, Workday), crawled twice a day: open roles now, added and removed per week, net change and growth rate over 7 and 30 days, teams and locations growing or shrinking, new roles, remote share, and a one-line summary. Costs $0.01 USDC on Base via x402.
company_jobs
Remote or on-site jobs open at a company right now, from its own applicant tracking system's public job board: Greenhouse, Lever, Ashby, Workable, SmartRecruiters, Recruitee, BambooHR, Personio, Teamtailor, or Workday from a careers URL. Give a company name, website or job-board URL, with optional title, location and remote filters. Returns the newest 50 matching jobs with title, department, location, remote flag, salary when published, posting date and apply link, plus total counts. Costs $0.005 USDC on Base via x402.
company_profile
Is a company hiring? A company's hiring profile from its public job board (Greenhouse, Lever, Ashby, Workable, SmartRecruiters, Recruitee, Workday), crawled twice a day: careers page, open roles, top departments, locations and countries, remote share, pay median, newest jobs, and jobs opened and closed in the last 7 and 30 days from our crawl history. Costs $0.01 USDC on Base via x402.
token
token_risk_check
Is this token safe? Rug check for any token on Base, Ethereum, Arbitrum, Optimism, Polygon or Solana: a 0-100 risk score with plain reasons (mint, freeze, blacklist, fee, pause or trading-switch powers, upgradeable code, holder concentration, thin liquidity, a deployer whose earlier tokens lost their liquidity), the facts behind it, and USD price and liquidity. A fingerprint sent back as since returns what changed. Rules-based, not advice. Costs $0.01 USDC on Base via x402.
token_verdict
Rug Radar verdict for a token on Base, Ethereum, Arbitrum, Optimism, Polygon or Solana: a grade (CLEAN, MID, SKETCHY, RUGGY), a one-liner, a short take and a shareable card, built from real onchain facts: the 0-100 risk score with its reasons and the deployer's record (did their earlier tokens lose liquidity?). Same call shape as quest verdicts: POST tokenAddress with an optional requestKey, echoed back. Rules-based, not financial advice. Costs $0.01 USDC on Base via x402.
token_watch_subscribe
Webhook alerts for up to 5 tokens on Base, Ethereum, Arbitrum, Optimism, Polygon or Solana for 7 days: we re-check each about hourly and POST a signed JSON alert to your https webhook when its risk score or reasons, owner or authorities, or liquidity (10%+) change, optionally price. Returns an id and an HMAC secret; GET /watch/<id> is free. Renew with {id}. Rules-based, not advice. Costs $0.05 USDC on Base via x402.
token_watchlist
Re-check up to 5 tokens you hold or watch in one call, on Base, Ethereum, Arbitrum, Optimism, Polygon or Solana: each token's 0-100 risk score, level, reason codes, price, liquidity and a fingerprint. Send the fingerprints back as since to get what changed (new risks, owner or authority changes, liquidity or price moves of 10%+) and a short list of alerts. One price for the whole list, made for polling positions on a schedule. Rules-based, not advice. Costs $0.01 USDC on Base via x402.
x402
x402_market_summary
The x402 economy in one call: measured daily spend across the top Bazaar sellers on Base, split into organic, likely wash and known samplers/graders, with 7-day totals, the top categories by spend and the top buyer wallets (addresses, labeled when known). Measured from USDC transfers of $5 or less into each seller's payTo on Base, one UTC day at a time, with the day it covers. Costs $0.005 USDC on Base via x402.
x402_ping
The smallest real x402 paid call: costs $0.001 in USDC and returns ok with the server time and payment network. Useful for checking that an x402 client can sign and settle a payment end to end. Costs $0.001 USDC on Base via x402.
x402_seller_stats
One x402 seller's measured revenue and buyers, by host (blockrun.ai) or payTo address: the latest day's revenue, payments, unique and repeat payers, top payer share and wash flags, its 7-day totals, and up to 90 days of daily history. Measured from USDC transfers of $5 or less into each seller's payTo on Base, one UTC day at a time, with the day it covers. Costs $0.005 USDC on Base via x402.
x402_top_sellers
Which x402 sellers actually earn? The top Bazaar sellers on Base ranked by measured revenue or paying wallets: 24-hour and 7-day revenue, payments, unique payers, repeat and returning payer share, top payer share, price range, categories and a likely-wash flag (one wallet doing the volume). Measured from USDC transfers of $5 or less into each seller's payTo on Base, one UTC day at a time, with the day it covers. Costs $0.01 USDC on Base via x402.
canada
canada_business_days
Number of business days between two dates in a Canadian province or territory, excluding weekends and that province's statutory holidays (with weekend holidays moved to their observed weekday). Counts from the start date up to but not including the end date, and lists the holidays skipped. Costs $0.005 USDC on Base via x402.
canada_sales_tax
Canadian sales tax breakdown for an amount in a province or territory: GST, HST, PST, RST or QST with each rate and amount rounded to the cent, plus the total. Rates are looked up for the given date (default today), so historical changes such as Nova Scotia's 2025 HST cut are handled. Costs $0.005 USDC on Base via x402.
canada_statutory_holidays
Statutory (general) holidays for a Canadian province or territory in a given year, using the province's local names, with the actual date and the weekday it is observed when it falls on a weekend. Costs $0.01 USDC on Base via x402.
jobs
jobs_new
Job alerts: new job openings since a time, for monitoring (e.g. new remote engineering roles): jobs first seen by a twice-daily crawl of about 20,000 company job boards (Greenhouse, Lever, Ashby, Workable, SmartRecruiters, Recruitee, Workday). Same filters as /jobs/search (title, company, location, remote, minimum salary). Returns up to 50 newest, each with when it was first seen, and nextSince for the next poll. Costs $0.01 USDC on Base via x402.
jobs_salary
Salary for a job title: how much a role pays, from open postings that publish pay, on about 20,000 company job boards crawled twice a day. Optional location, remote and currency. Returns yearly p10/p25/median/p75/p90, the typical posted range, remote vs on-site medians, the five top-paying companies and the posting count. Costs $0.01 USDC on Base via x402.
jobs_search
Job search: find open jobs (remote, by title, location or pay) across about 20,000 company job boards (Greenhouse, Lever, Ashby, Workable, SmartRecruiters, Recruitee, Workday), crawled twice a day: about 470,000 jobs. Filter by title words, company, location, remote, minimum yearly salary and posting age. Returns up to 50 newest matches with company, location, remote flag, salary when published, posting date and link. Costs $0.005 USDC on Base via x402.
website
website_audit
Website audit in one call: HTTP security headers (HSTS, CSP, clickjacking, cookies, mixed content), on-page SEO (title, meta description, h1, canonical, noindex, robots.txt, sitemap, Open Graph, structured data), static WCAG 2.1 accessibility checks (alt text, labels, link and button names, lang, zoom), server response time and page weight, and the tech stack. Findings with severity and a 0-100 score per section. Repeat audits list what changed since the previous one. Costs $0.05 USDC on Base via x402.
website_history
A website's history from the Internet Archive's Wayback Machine: first and last capture, how many years and months it was archived, activity by year, the longest gap, the last capture's HTTP status and links to the first and last snapshots. Useful for domain age, due diligence and spotting parked or re-registered domains. Costs $0.003 USDC on Base via x402.
website_tech_stack
The technologies a website runs on, from one fetch of the page: CMS, e-commerce platform, frameworks, analytics and tag managers, marketing and chat tools, payments, CDN, hosting and web server, about 85 signatures. Each with its category, plus a by-category summary. Costs $0.002 USDC on Base via x402.
address
address_sanctions_exposure
Has this wallet dealt with sanctioned addresses? Reads up to 4,000 of the wallet's latest transfers (native, internal, ERC-20, NFTs) on Base, Ethereum, Arbitrum, Optimism or Polygon and checks every counterparty against the OFAC SDN list's addresses: each sanctioned counterparty with entity, programs, direction, transfer count, assets and dates. Direct exposure only. Not legal advice. Costs $0.01 USDC on Base via x402.
address_sanctions_screen
Is this address sanctioned? Screens a crypto address against the US Treasury OFAC SDN list's published digital currency addresses (ETH, USDC, USDT, XBT, SOL, TRX and others): the listed entity, programs and listing date on a match, or not found as of the list date. Adds whether it is a wallet (EOA) or contract on Base, Ethereum, Arbitrum, Optimism or Polygon, or a wallet or program-derived address on Solana. Not legal advice. Costs $0.005 USDC on Base via x402.
chat
ai_chat
LLM chat completion, flat $0.003 a call: send a prompt (plus optional system) or an OpenAI-style messages array and get the reply text with token usage. Models: gpt-oss-20b (default), qwen3-30b, glm-4.7-flash, llama-4-scout. Up to 16,000 characters in and 1,024 tokens out; json=true for JSON output. Costs $0.003 USDC on Base via x402.
ai_chat_pro
LLM chat completion on larger models, flat $0.01 a call: prompt (plus optional system) or an OpenAI-style messages array in, reply text and token usage out. Models: gpt-oss-120b (default), deepseek-v4.1-flash, llama-3.3-70b, mistral-small-3.1, glm-5.3-flash. Up to 32,000 characters in and 2,048 tokens out; json=true for JSON output. Costs $0.01 USDC on Base via x402.
deployer
deployer_links
Which other launch wallets share this deployer's funder? Serial ruggers launch each token from a fresh wallet funded from one source. Pass a deployer wallet or a token on Base, Ethereum, Arbitrum, Optimism, Polygon or Solana: returns the wallet that first funded it (exchanges, bridges and busy services flagged, never linked), the other deployers it funded, their tokens and how many lost their liquidity within a week, from our own launch records since 2026-10-23. Not advice. Costs $0.01 USDC on Base via x402.
deployer_record
Who launched this token, and what happened to their other tokens? A creator's launch record on Base, Ethereum, Arbitrum, Optimism, Polygon or Solana from our own history of new pools: every token the wallet launched since 2026-10-23 with its risk score at launch and whether its liquidity was gone 24 hours and 7 days later, plus a verdict (repeat-rugger, prior-rug, serial-launcher, clean-so-far, too-new). Pass the deployer wallet or a token address. Not advice. Costs $0.005 USDC on Base via x402.
ecb
fx_ecb_convert
Convert an amount between two currencies at the European Central Bank daily reference rate, latest or for a past date, returning the rate used, the result, and the rate date. Costs $0.005 USDC on Base via x402.
fx_ecb_rates
European Central Bank daily reference exchange rates for about 30 major currencies, from any base currency, latest or for a past date. Rates update once per working day; the response states which day. Costs $0.005 USDC on Base via x402.
email
email_find
Finds a person's likely work email from their name and company domain. Checks the domain's mail servers, reads the company's homepage and contact pages for addresses it publishes to learn its pattern (jane.doe, jdoe, jane), and ranks candidates with a confidence each. An exact address found on the site comes first. No SMTP probe. Costs $0.005 USDC on Base via x402.
email_validate
Is this email address worth sending to? Checks syntax, the domain's mail servers (MX, implicit MX, null MX) and mail provider, disposable domains (10,000+ known), role accounts (info@, sales@), free providers, and misspelled domains (gmial.com suggests gmail.com). Returns valid, risky or invalid with a 0-100 score and reasons. No SMTP probe. Costs $0.002 USDC on Base via x402.
prepayment
prepayment_safety_check
Is it safe to pay this address? One check before sending or accepting crypto: OFAC SDN sanctions screen, wallet age, EOA or contract, first funder and recent large transfers on Base, Ethereum, Arbitrum, Optimism or Polygon (wallet kind and activity on Solana), plus the token's 0-100 risk score when a token is given. Returns ok, caution or block with plain reasons and each check in full. Rules-based, not legal advice. Costs $0.02 USDC on Base via x402.
prepayment_safety_check_lite
Is it safe to pay this address? The address-only version of /check: OFAC SDN sanctions screen, wallet age, EOA or contract, first funder and recent large transfers on Base, Ethereum, Arbitrum, Optimism or Polygon (wallet kind and activity on Solana), with the funder and counterparties screened too. Returns ok, caution or block with plain reasons. No token score (use /check for that). Rules-based, not legal advice. Costs $0.01 USDC on Base via x402.
solana
solana_token_snapshot
Rug check and due-diligence snapshot of a Solana SPL or Token-2022 token: a 0-100 risk score with reasons, name, symbol, supply, mint and freeze authority, Token-2022 controls (permanent delegate, transfer fees, transfer hook, pausable), metadata mutability, top-holder concentration split into wallets and program accounts, and USD price, liquidity, volume and pools from Jupiter and DexScreener. Facts only, no buy or sell opinion. Costs $0.01 USDC on Base via x402.
solana_wallet
Portfolio and activity of a Solana wallet: SOL and every SPL and Token-2022 balance with USD values from Jupiter, sorted by value, with dust, unpriced and empty token accounts summarized, plus the newest transaction time, transactions in the last 24 hours, and the oldest transaction in the newest 1,000, with a flag when history goes further back; plus, from our launch history, tokens it deployed and how many lost their liquidity, and deployers it funded. Costs $0.005 USDC on Base via x402.
crypto
crypto_price
Current USD price and 24-hour change for up to 20 crypto tokens in one call: symbols (btc, eth, sol), CoinGecko ids (coingecko:bitcoin) or contract addresses on any chain (base:0x..., solana:<mint>), from DefiLlama's aggregated prices. Costs $0.002 USDC on Base via x402.
document
document_to_markdown
Convert a document at a URL to Markdown for an LLM: PDF, Word (DOCX), Excel (XLSX, XLS), OpenDocument (ODT, ODS), CSV and XML, up to 20 MB. Returns the Markdown with character, word and token counts. Costs $0.005 USDC on Base via x402.
domain
domain_lookup
Everything about a domain in one call: DNS records (A, AAAA, NS, MX, TXT, CAA, CNAME), email security graded A-F (mail provider, SPF, DMARC policy, DKIM at common selectors, BIMI, with findings) and RDAP registration (registrar, created, expires, age in days, status, nameservers, DNSSEC). Repeat lookups list what changed since the previous check. Costs $0.003 USDC on Base via x402.
economy
economy_indicators
A country's headline economics from the World Bank: GDP, GDP growth, GDP per capita (nominal and PPP), inflation, unemployment, population and growth, government debt, current account, exports, imports, FDI, real interest rate and life expectancy, each with its latest year, the previous year and the change. Plus region, income level and capital. Costs $0.005 USDC on Base via x402.
embeddings
ai_embeddings
Text embeddings with bge-m3 (1,024 dimensions, multilingual): one text, or up to 32 texts in one call (POST texts array), up to 32,000 characters in all. For semantic search, clustering and similarity. Costs $0.002 USDC on Base via x402.
image
ai_image
Generate an image from a text prompt with FLUX.1 [schnell]: a 1024x1024 JPEG returned as base64 in JSON. Optional steps (1-8, default 4) and seed for repeatable results. Costs $0.01 USDC on Base via x402.
keywords
ai_keywords
Keywords with relevance scores (up to 10), named entities typed as person, organization, location, product or event (up to 10), and 1-3 broad topics from a text. Up to 5,000 characters. Llama 4 Scout on Workers AI. Costs $0.003 USDC on Base via x402.
prediction
prediction_markets
Prediction market odds for any topic from Polymarket: matching events with each market's outcomes and implied probabilities, 24-hour change, volume, liquidity and end date. For questions like 'odds of a Fed rate cut' or 'will bitcoin reach 150k'. Costs $0.005 USDC on Base via x402.
rewrite
ai_rewrite
Rewrite a text in another tone, keeping its meaning, facts and language: professional (default), casual, friendly, formal, concise, simple, persuasive, confident or empathetic. Up to 5,000 characters. Llama 4 Scout on Workers AI. Costs $0.003 USDC on Base via x402.
sanctions
sanctions_name_search
Screens a person, company, vessel or aircraft name against the OFAC SDN and non-SDN lists, the UN Security Council consolidated list and the UK Sanctions List (about 27,000 entries with aliases). Fuzzy matching ignores word order, accents, punctuation and legal forms. Each match: 0-100 score, list, listed name, type, programs, aliases, birth date, nationality. Not legal advice. Costs $0.005 USDC on Base via x402.
sec
sec_company
US public company data from SEC EDGAR by ticker, CIK or name: industry, exchange, address, fiscal year end, recent filings (10-K, 10-Q, 8-K) with links, and latest annual and quarterly revenue, net income, operating income, EPS, assets, liabilities, equity, cash and operating cash flow. Costs $0.005 USDC on Base via x402.
sentiment
ai_sentiment
Sentiment of a text (review, post, email, support ticket): positive, negative, neutral or mixed, a score from -1 to 1, confidence, up to 3 emotions and per-aspect sentiment. Up to 5,000 characters, any language. Llama 4 Scout on Workers AI. Costs $0.003 USDC on Base via x402.
summarize
ai_summarize
Summary of a text in one sentence, 2-3 sentences or a paragraph (length short, medium or long), plus 3-5 key points and the text's language. Up to 5,000 characters. Llama 4 Scout on Workers AI. Costs $0.003 USDC on Base via x402.
text
ai_text_to_speech
Text to speech: up to 1,000 characters spoken as a WAV file (22 kHz mono), returned as base64 in JSON. Languages: English, Spanish, French, Chinese, Japanese, Korean (MeloTTS). Costs $0.01 USDC on Base via x402.
transcribe
ai_transcribe
Speech to text with Whisper large-v3 turbo: pass the URL of an audio file (MP3, WAV, OGG, M4A; up to 15 MB) and get the transcript, detected language, duration, word count and timed segments. Optional language hint. Costs $0.01 USDC on Base via x402.
translate
ai_translate
Translate text between 100 languages (m2m100): up to 5,000 characters, target language as an ISO 639-1 code; the source language is detected when not given. Costs $0.003 USDC on Base via x402.
vat
vat_validate
Validates an EU VAT number against the European Commission's VIES service: registered or not, with the registered company name and address where the member state shares them. Checks the number's format per country first. Covers the 27 EU states and Northern Ireland (XI); UK (GB) numbers get a format check only. Costs $0.003 USDC on Base via x402.
weather
weather_forecast
Weather now and forecast for any place: current conditions, the next 24 hours hourly and up to 10 days of daily min/max temperature, precipitation, wind and conditions, from MET Norway. Pass a city or address, or lat and lon. Costs $0.003 USDC on Base via x402.
web
web_extract
Read a web page as clean Markdown for an LLM: fetches the URL, drops navigation, header, footer, forms and scripts, and returns the main text as Markdown with title, description, language, author, publish date, image and word count. Optional links=true adds the page's links. Text and JSON URLs come back as-is. Costs $0.002 USDC on Base via x402.
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://onchaincheck.dev/mcp | streamable-http | answering | 650 ms | 0 min ago |
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onchaincheck — questions
Answers built from our own checks of this server.
What can onchaincheck do?
It exposes 106 tools, read directly from the server on our last check. Among them: address_sanctions_exposure, address_sanctions_screen, ai_chat, ai_chat_pro, ai_embeddings, ai_image and 100 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README.
How MCP servers expose tools in the first place →
What is onchaincheck mostly used for?
Its tools cluster around base, eth and arbitrum. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.
Is onchaincheck working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 401 ms. The bar chart above shows every period we have measured.
How do I connect onchaincheck?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does onchaincheck need an API key?
No. onchaincheck completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 106 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is onchaincheck?
It answers our handshake in 401 ms on average, which is faster than 32% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.