OnchainDiligence MCP Server

by onchaindiligence Your server? Claim it

answering

OnchainDiligence is answering right now. Last checked 12 min ago. It exposes 21 tools. Last commit 16 Sep 2026.

Pay-per-call compliance via x402: wallet sanctions, OFAC name, UK + US company verification.

Uptime history 47 days of history · worst day 35%

47 days agonow

56.0%

Uptime 24h

51 of 91 checks

Tools

read from the server

538 ms

Response time

average over 24h

Stars

last commit 16 Sep 2026

What changed 24

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 27 August 2026. No other catalogue keeps this.

13 Sep 6 tools appeared inspect_bridge, inspect_staking, observe_bridge and 3 more

12 Sep 3 tools appeared inspect_swap, observe_swap, preflight_swap

11 Sep 3 tools appeared inspect_allowance, observe_allowance, preflight_allowance

5 Sep 4 tool descriptions were rewritten preflight_payment, screen_wallet, verify_uk_company and 1 more

5 Sep 2 tools appeared get_receipt, verify_receipt

5 Sep 2 tools changed the parameters they ask for inspect_payment, preflight_payment

4 Sep 2 tools appeared inspect_payment, preflight_payment

27 Aug 2 tool descriptions were rewritten screen_wallet, verify_us_company

OnchainDiligence does not always answer

Over the last week it answered 63.5% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 12 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add compliance --transport http https://mcp.onchaindiligence.com/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "compliance": {
      "url": "https://mcp.onchaindiligence.com/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.compliance]
url = "https://mcp.onchaindiligence.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "compliance": {
      "url": "https://mcp.onchaindiligence.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "compliance": {
      "url": "https://mcp.onchaindiligence.com/mcp"
    }
  }
}

Available tools 21

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

inspect

inspect_allowance

FREE. Deterministically inspect an ERC-20 allowance/revocation request against explicit network/token/spender/value policy. No wallet action, no signing, no chain read unless a separately requested preflight asks for it.

inspect_bridge

FREE. Deterministically inspect a narrow Circle CCTP V2 Base-to-Ethereum native-USDC bridge request against explicit policy. No wallet action, no signing, no chain read.

inspect_payment

FREE. Pure deterministic inspection of a proposed payment against structured policy (amount/network/asset/recipient/resource) — no external evidence, no sanctions screening, no cryptographic signing, no receipt. Returns the same ALLOW / REQUIRE_APPROVAL / BLOCK decision semantics as POST /x402/preflight-payment for the deterministic checks alone, so a caller can sanity-check a proposal before deciding whether the paid preflight (adds optional sanctions evidence and a signed, independently-verifiable receipt, $0.01) is worth paying for. This result is NOT cryptographically attested and carries no receipt — receipt is always null.

inspect_staking

FREE. Deterministically inspect a narrow Ethereum Lido stETH submit request against explicit policy. No wallet action, signing, or chain read.

inspect_swap

FREE. Deterministically inspect a narrow Base USDC-to-WETH direct Uniswap V3 swap against explicit policy. No wallet action or signing.

preflight

preflight_allowance

Call BEFORE an agent asks its wallet to approve or revoke a Base USDC ERC-20 allowance. OCD evaluates strict policy and returns a signed portable allowance artifact. ALLOW is policy only, never wallet authority.

preflight_bridge

Call BEFORE an agent asks its wallet to bridge Base USDC to Ethereum via Circle CCTP V2 (depositForBurn). OCD evaluates strict policy and returns a signed portable bridge artifact. ALLOW is policy only, never wallet authority.

preflight_payment

Call BEFORE an agent authorizes an autonomous payment. Evaluates it against your policy (max amount, allowed networks/assets, expected recipient, allowed origins) and returns a signed PREFLIGHT receipt -- ALLOW, REQUIRE_APPROVAL, or BLOCK, with reasons -- independently verifiable by anyone. Policy evaluation only: OCD never holds, moves, or authorizes funds. The wallet/x402 client separately authorizes execution after; ALLOW does not guarantee it will proceed.

preflight_staking

Call BEFORE an agent asks its wallet to submit ETH to Lido stETH. OCD evaluates strict policy and returns a signed portable staking artifact. ALLOW is policy only, never wallet authority.

preflight_swap

Call BEFORE an agent asks its wallet to execute a narrow Base USDC-to-WETH direct Uniswap V3 swap. OCD returns a signed portable policy artifact. ALLOW is policy only, never wallet authority.

observe

observe_allowance

Given a signed OCD allowance preflight artifact and submitted Base transaction hash, independently inspect its canonical-USDC Approval event, Base safe-head finality, and historical allowance state. OCD never executes the transaction.

observe_bridge

Given a signed OCD bridge preflight artifact, the Base depositForBurn transaction hash, and (once available) the Ethereum receiveMessage transaction hash, independently observe both chains, verify the CCTP message identity matches, and reconcile against the authorized action. Source-only observation is reported as an evidence gap, never as completion.

observe_staking

Given a signed OCD staking preflight artifact and Ethereum transaction hash, independently inspect the canonical Lido Submitted event, transaction sender/value, optional minted shares, and Ethereum finalized-head finality. OCD never stakes ETH.

observe_swap

Given a signed OCD swap preflight artifact and Base transaction hash, independently inspect direct Uniswap V3 exactInputSingle calldata, ERC-20 transfers, and Base safe-head finality. OCD never executes the swap.

verify

verify_receipt

Independently checks whether a receipt is cryptographically VALID, INVALID, or UNVERIFIABLE, with a reason code. Free, no payment. Pass EITHER receipt_id (looks it up first, must be public) OR a complete receipt envelope you already hold (verified directly, no publication needed). This is a convenient ONLINE check -- it trusts this server to have honestly fetched the real signing-key registry. Running the same check yourself offline (the published @onchaindiligence/agent-evidence package) is a strictly stronger trust position; this tool does not replace that option.

verify_uk_company

UK company KYB lookup via the official Companies House register. Given a UK registration number, returns legal status (active/dissolved), company type, incorporation date, registered office, and people with significant control (PSC / beneficial owners). Call to confirm a UK business is real, active, and who controls it, for KYB onboarding and counterparty due diligence. Authoritative UK government data.

verify_us_company

US public company verification via SEC EDGAR. Given a ticker, CIK, or company name, returns entity name, CIK, industry (SIC), state of incorporation, exchanges/tickers, address, and latest SEC filing. Ambiguous names return candidates, never a silent selection. Covers SEC-registered PUBLIC companies and funds only -- not private US companies. Call for KYB and counterparty due diligence on listed US entities.

screen

screen_name

OFAC name screening: fuzzy-match a person or company name against the official US Treasury OFAC Specially Designated Nationals (SDN) list (primary names + strong aliases). Returns scored candidate matches with the matched name, SDN type, and program. SCOPE: this is a screening aid for AML / KYC / sanctions compliance — a match is a candidate to investigate with secondary identifiers (DOB, nationality, ID), NOT a determination. Weak AKAs are not screened, per OFAC guidance.

screen_wallet

Sanctions-screen an EVM wallet address against the Chainalysis on-chain oracle (OFAC SDN, EU, UN designations). Reflects current status, including delistings -- a once-designated address may now screen clean. Returns a sanctioned / not-sanctioned boolean (no case-level detail). Call before sending USDC or other funds to an address, for AML compliance and counterparty due diligence.

diligence

diligence

Combined counterparty due diligence in one call: runs sanctions screening on a crypto wallet (Chainalysis oracle — OFAC SDN, EU, UN) AND a UK Companies House KYB lookup (status, type, PSC / beneficial owners) in parallel. Built for compliance agents vetting a counterparty that has both an on-chain wallet and a UK company. Returns both independent results, plus an explicit disclaimer that no verified link between the wallet and the company is established by the data.

receipt

get_receipt

Look up a public OCD receipt by its exact receipt_id (format "OCD-RCP-XXXX-XXXX-XXXX-XXXX"). Free, no payment. Returns the complete signed receipt envelope, or a structured not-found/unavailable reason -- never a guess. A private (unpublished) receipt and an unknown id are indistinguishable, both by design: this never confirms or denies that a private receipt exists.

Endpoints

URL	Transport	State	Latency	Checked
https://mcp.onchaindiligence.com/mcp	streamable-http	answering	331 ms	12 min ago

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Africa FX, US carrier/broker checks, OFAC screening — paid per call via x402.

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OnchainDiligence — questions

Answers built from our own checks of this server.

What can OnchainDiligence do?

It exposes 21 tools, read directly from the server on our last check. Among them: diligence, get_receipt, inspect_allowance, inspect_bridge, inspect_payment, inspect_staking and 15 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 OnchainDiligence mostly used for?

Its tools cluster around inspect, preflight and observe. 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 OnchainDiligence working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 51 of 91 checks got a reply (56.0%), average response time 538 ms. The bar chart above shows every period we have measured.

How do I connect OnchainDiligence?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does OnchainDiligence need an API key?

No. OnchainDiligence completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 21 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is OnchainDiligence?

It answers our handshake in 538 ms on average, which is faster than 26% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is OnchainDiligence open source?

We cannot say either way: written in TypeScript and 0 stars on GitHub, but we could not determine the licence, and without one the code is not open source by default.