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io.github.dimitrilaouanis-tech/onyx-mcp
io.github.dimitrilaouanis-tech/onyx-mcp in the official MCP registry.
Endpoint https://onyx-actions.onrender.com/mcp/. Source: github.com/dimitrilaouanis-tech/onyx-mcp.
The registry describes it as: Ed25519-signed ground-truth oracle — 63 paid x402 tools live on Base mainnet.
We read its 33 tools on 2026-10-26. Nothing in them matched our tool-poisoning rules.
A clean read means these rules found nothing, not that the server is harmless. A server can change its tools at any time, which is why the index reads it again every week.
Tools it advertises
onyx_agent_economy_index onyx_agent_registry onyx_agent_verify onyx_ai_visibility onyx_attestation_verify onyx_contract_audit onyx_ecosystem_intel onyx_intel_exchange onyx_mail_check onyx_mail_send onyx_market_rank onyx_merchant_fact_check onyx_aeo_score onyx_erc8004_lookup onyx_perm_check onyx_perm_grant onyx_security_flags onyx_payment_gate onyx_preflight onyx_research_intel onyx_retail_price_check rhinogent_identity rhinogent_mandate rhinogent_verify_counterparty onyx_secure_payment onyx_signature_guard onyx_token_risk onyx_track_record onyx_tx_guard onyx_tx_preflight onyx_verified_issue onyx_verify_explain onyx_x402_receipt_verify
Run this server? Show the check in your README
The badge reflects the latest weekly read: 
[](https://lazaretto.dev/mcp-registry/io-github-dimitrilaouanis-tech-onyx-mcp)How this was checked
Lazaretto connects to the endpoint the way any MCP client does, asks the server to introduce itself and list its tools, and reads every name, description, parameter schema and server instruction for tool poisoning: hidden directive blocks, orders to read local secrets, parameters built to carry secrets or the conversation out, orders that redirect another server's tools, and invisible characters. It never calls a tool. What we found across the registry.
To run the same check every time Claude Code adds a server, install the free lazaretto-guard plugin. Browse every server in the index.
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