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FinancialOSINTMCP serverFirst audited Nov 13, 2026

Onyx AML

Crypto address risk checks for agents: USDT/USDC blacklists, sanctions, scam lists, poisoningThe vendor's description, from its MCP Registry listing.

Passed, with 1 warningAudited Nov 13, 2026
  • Warning: 8 of 8 tools do not say whether they can change things.

Nothing failed, but there is something to know or fix. Public audit: we connect as an AI client would, list the tools and check what they say. We do not run them. How we audit

Does it work?
YesConnected in 543 ms.
Sign-up?
None neededIt answered without any account or key.
Can it change things?
Doesn't sayIts tools do not say whether they only read, so treat them as able to change things.
Endpointhttps://onyxprotocol.trade/mcp

Website Streamable HTTP · protocol 2025-06-18 · server version 1.0.0

What we checked, the evidence, and the tools it offers.

What we checked

Security

  • Passed: Connections are encrypted (HTTPS).

  • Passed: No hidden instructions found in tool text.

Safety labels

  • Warning: 8 of 8 tools do not say whether they can change things.

    MCP lets a server label each tool as read-only or destructive, so clients can ask the user before risky calls. Unlabelled tools are treated as able to change things.

    • onyx_decide
    • onyx_screen
    • onyx_screen_batch
    • onyx_preflight
    • onyx_trace
    • onyx_watch
    • onyx_balance
    • onyx_payment_info

Tools

  • Passed: 8 tools listed.

  • Passed: Every tool describes its inputs with a valid schema.

Protocol

  • Note: Protocol version 2025-06-18.

  • Passed: The MCP handshake works (Streamable HTTP).

  • Passed: Unknown requests are refused.

Connection

  • Passed: The server responds.

Tools (8)

As the server describes them. The labels are the server's own: it says whether each tool only reads or can change things.

  • onyx_decideReturn allow / review / deny for a counterparty address against your own risk policy, with the reasons named. Use this before every outbound transfer. Checks issuer blacklists (USDT, USDC), sanctions…Doesn't say
  • onyx_screenReturn the raw risk markers for one address: risk zone, issuer blacklists, sanctions coverage, scam databases, community reports, address age, balance and exchange attribution where known. Use this w…Doesn't say
  • onyx_screen_batchScreen up to 50 addresses in a single call, for example before a mass payout. Priced per address, and only addresses actually screened are charged. Each result carries facts_complete so you can tell…Doesn't say
  • onyx_preflightOperational safety check for a payment, separate from risk screening. Detects address poisoning (a lookalike planted in your history so it gets copied instead of the real address), burn addresses, to…Doesn't say
  • onyx_traceMulti-hop trace of outgoing flows from an address, with attribution where a node is known (exchange labels, deposit addresses). Use it to establish provenance after receiving funds. Costs more than a…Doesn't say
  • onyx_watchSubscribe to an address. When it enters an issuer blacklist, a sanctions list or a scam database, we POST a signed event to your callback URL. A one-off check cannot warn you about a freeze that has…Doesn't say
  • onyx_balanceHow much credit your API key has left, and the current prices. Free.Doesn't say
  • onyx_payment_infoMachine-readable payment terms: which asset and network to send, the address, prices per operation, and how to claim an API key from the address you paid from. No account or signup is involved. Free,…Doesn't say

Audit history

  1. Nov 13Warnings

What we sent

Every request in this audit, with the answer and how long it took. We never send credentials and never call a tool.

RequestAnswerTime
initializeHTTP 200543 ms
initializedHTTP 202371 ms
tools/listHTTP 200124 ms
unknown-methodHTTP 200140 ms

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