Quartermaster is answering right now. Last checked 11 min ago. It exposes 49 tools.
x402 toolkit for AI agents: paid web, AI, and Base chain tools per call in USDC. Free tools too.
Uptime history
91 days of history · worst day 92%
91 days agonow
100.0%
Uptime 24h
91 of 91 checks
49
Tools
read from the server
209 ms
Response time
average over 24h
open, no key
Access
streamable-http
Nothing serious here today
Today is the operative word: we check Quartermaster 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 11 min ago.
run in your terminal
claude mcp add quartermaster --transport http https://quartermaster.surewhynot.app/mcpSettings → Connectors → Add custom connector, then paste this address
https://quartermaster.surewhynot.app/mcp~/.codex/config.toml
[mcp_servers.quartermaster]
url = "https://quartermaster.surewhynot.app/mcp".cursor/mcp.json
{
"mcpServers": {
"quartermaster": {
"url": "https://quartermaster.surewhynot.app/mcp"
}
}
}.vscode/mcp.json
{
"servers": {
"quartermaster": {
"type": "http",
"url": "https://quartermaster.surewhynot.app/mcp"
}
}
}Available tools 49
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
x402
x402_audit
[x402] WORKFLOW: full scored audit of an x402 SELLER endpoint (a URL) in one call - verifies the 402 challenge, payment fields, Bazaar discovery metadata, and the origin's discovery surfaces; returns a 0-100 score, checks with evidence, and recommended fixes. Costs $0.01. Use this to grade an endpoint before trusting/publishing it; use settlement_assurance instead when you already have a transaction hash and want to prove a completed PAYMENT settled correctly.
x402_discover
[x402] Search the Coinbase x402 Bazaar for paid resources by natural-language query. Costs $0.001.
x402_inspect
[x402] Inspect and lint any x402 paid endpoint: decode the 402 challenge, identify network/asset, flag misconfigurations and Bazaar-readiness. Costs $0.002. Choose this for a quick one-shot decode+lint; use x402_audit for a full 0-100 scored report with origin discovery probes and recommended fixes.
x402_merchant
[x402] List all x402 Bazaar resources under a merchant payTo wallet. Costs $0.001.
x402_router
START HERE. One tool for anything x402, Base chain, or web/AI: describe your goal in plain English (q) and Quartermaster picks and runs the right underlying tool, returning the answer plus which tool it used. Examples: 'audit https://api.example.com/paid', 'price of eth', 'is 0x… a contract', 'verify settlement 0x…', 'search the bazaar for weather'. Use this when you don't want to choose among the individual tools below. Costs $0.03 (USDC via x402).
x402_simulate
[x402] Pre-flight a payment BEFORE you spend: decode an endpoint's 402 challenge, report the cost on every rail (Base and Solana) and the cheapest, and — with an optional payer address — verify the wallet can afford the call on Base. Costs $0.003. Use this before paying an unfamiliar endpoint; use x402_inspect to lint an endpoint you own.
x402_test_vector
[x402] Free: example x402 payment-requirement objects with field explanations.
base
base_allowance
Check an ERC-20 spending allowance on Base; flags unlimited approvals. Costs $0.001.
base_contract
Determine whether a Base address is a contract or an EOA. Costs $0.001.
base_token_info
ERC-20 name, symbol, decimals, total supply for a token on Base. Costs $0.001.
base_usdc_transfers
Recent USDC transfers (in and out) for an address on Base. Costs $0.002.
http
http_check
[Web] Liveness/latency pre-flight for a URL: is it up, HTTP status and class, response latency in ms, whether it redirects and where, content-type and server. Costs $0.001. Use before relying on a dependency.
http_error_explain
[Web] Explain an HTTP status code: meaning, common causes, fixes, retry guidance. Costs $0.001.
http_errors_list
FREE (no wallet needed): index of documented HTTP status codes (use http_error_explain for a paid detailed explanation).
generate
generate_uuid
FREE (no wallet needed): generate UUID v4 values, up to 100 at once.
qr_generate
[Web] Generate a QR code as SVG (or terminal text with format=text). Costs $0.002.
payment
payment_proof
[x402] Verify an x402 settlement on Base OR Solana from a tx id (0x hash or base58 signature): confirm it succeeded, decode its USDC transfers, optionally assert payTo/amount - returns a single verdict. Costs $0.003. Choose this when you only need the yes/no did-it-land answer; use settlement_assurance for the full scored report (proof + receipt + optional endpoint audit).
payment_receipt
[x402] Formatted settlement receipt for a Base transaction (0x hash) or Solana settlement (base58 signature): timestamp, decoded transfers, explorer link. Costs $0.002. Choose this for a human-readable record; use payment_proof to ASSERT a specific payTo/amount, or settlement_assurance for a full scored verdict.
random
random_numbers
[Dev] Cryptographically-secure random integers in a range (CSPRNG, unbiased) — real entropy an LLM cannot produce itself. Costs $0.001.
random_pick
[Dev] Pick one or several options at random from a caller-supplied list (CSPRNG), optionally without replacement. Costs $0.001.
text
text_diff
[Dev] Compact line-level diff between two texts. Costs $0.001.
text_stats
[Dev] Word/sentence counts, reading time, and readability score for text. Costs $0.001.
base64
base64
[Dev] Base64 encode or decode a string. Costs $0.001.
classify
classify_text
[AI] Zero-shot classification of text into caller-supplied labels; the result is validated back into your label set so you can route on it. Costs $0.002.
current
current_time
FREE (no wallet needed): current time as ISO, unix, UTC, and optional local time for an IANA timezone.
decode
tx_decode
[Crypto/Base] Decode a Base transaction's calldata into the function it called and its arguments — ERC-20 transfer/approve and the EIP-3009 transferWithAuthorization used by x402 settlements. Recognizes x402 settlement transactions and formats USDC amounts. Costs $0.003. Use tx_status for pass/fail; use this to see WHAT a transaction did.
describe
describe_image
[AI] AI vision: describe a public image URL, including visible text. Costs $0.005.
dns
dns_lookup
[Web] Resolve DNS records over DNS-over-HTTPS (A, AAAA, CNAME, MX, NS, TXT, and more). Costs $0.001.
embed
embed_text
[AI] Text embeddings (1024-dim vector) for semantic search and RAG. Costs $0.002.
extract
extract_structured
Structured extraction: JSON Schema plus a URL or raw text in, matching JSON out. Costs $0.005.
gas
gas_prices
[Crypto/Base] Current Base gas prices with a simple-transfer cost estimate. Costs $0.001.
hash
hash_string
FREE (no wallet needed): SHA-1/256/384/512 hex digest of a string.
jwt
jwt_decode
[Dev] Decode a JWT header and payload (signature NOT verified). Costs $0.001.
moderate
moderate_text
[AI] Content-safety classification (Llama Guard): safe flag plus category codes. Costs $0.002.
page
page_meta
[Web] Get page metadata: title, description, Open Graph, canonical URL, favicon, language. Costs $0.002.
public
public_holiday
[Dev] Is a date a public holiday in a country (2-letter ISO code)? Returns the holiday name, its types, and the next upcoming holiday. Costs $0.001. Useful for scheduling.
quartermaster
quartermaster_info
Free: catalog, prices, and payment instructions for this server.
regex
regex_test
[Dev] Test a regular expression against text; returns every match with numbered and named capture groups. Deterministic. Costs $0.001.
resolve
resolve_basename
Resolve a Basename (.base.eth) to a wallet address on Base. Costs $0.001.
settlement
settlement_assurance
[x402] FLAGSHIP: from a tx id on Base (0x hash) or Solana (base58 signature), prove a completed x402 payment is real and sound - onchain success, USDC transfer match to an expected wallet/amount, a receipt, and an optional audit of the issuing endpoint - as one 0-100 scored report with a verdict. Costs $0.03. This is the most complete post-payment check; use payment_proof if you only need a plain pass/fail, tx_status for raw status, or x402_audit to grade a seller endpoint by URL (no payment yet).
status
tx_status
[Crypto/Base] Check a Base transaction: success/reverted/pending, confirmations, gas, explorer link. Costs $0.002. Choose this for a quick raw status; use payment_receipt for decoded transfers, or settlement_assurance to PROVE an x402 payment settled to the right wallet/amount.
summarize
summarize_url
[AI] AI summary of a public webpage (fetch + extract + summarize). length: short|medium|long. Costs $0.01.
tldr
tldr_text
[AI] Summarize raw text you pass in directly (not a URL). length: short|medium|long. Costs $0.005. Use summarize_url when you have a URL instead.
token
token_price
[Crypto/Base] USD price for major tokens by symbol or any Base ERC-20 by address. Costs $0.001.
translate
translate_text
[AI] AI translation into any target language; source auto-detected. Costs $0.005.
unshorten
unshorten_url
[Web] Expand a shortened/redirecting URL: follow the redirect chain and return every hop plus the final destination. Each hop is SSRF-validated. Costs $0.002. Safe way to see where an untrusted link goes.
usdc
usdc_normalize
Convert USDC amounts between atomic units and human decimals. Costs $0.001.
wallet
wallet_balance
[Crypto/Base] ETH and USDC (or any ERC-20) balance for an address on Base. Costs $0.001.
web
web_extract
[Web] Extract clean readable text and metadata from a public webpage as structured JSON. Costs $0.005 (USDC via x402).
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://quartermaster.surewhynot.app/mcp | streamable-http | answering | 322 ms | 11 min ago |
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Quartermaster — questions
Answers built from our own checks of this server.
What can Quartermaster do?
It exposes 49 tools, read directly from the server on our last check. Among them: base64, base_allowance, base_contract, base_token_info, base_usdc_transfers, classify_text and 43 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 Quartermaster mostly used for?
Its tools cluster around x402, base and http. 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 Quartermaster working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 209 ms. The bar chart above shows every period we have measured.
How do I connect Quartermaster?
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 Quartermaster need an API key?
No. Quartermaster completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 49 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Quartermaster?
It answers our handshake in 209 ms on average, which is faster than 69% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.