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US Company Intelligence for AI Agents (SEC EDGAR, x402)

online.x-402/mcp in the official MCP registry. Endpoint https://api.x-402.online/mcp.

The registry describes it as: SEC EDGAR company briefs for agents: cited synthesis, XBRL metrics. x402/USDC, no account.

Connect it

The endpoint answers MCP over HTTP; that is how we read it. Add it to your client:

claude mcp add --transport http x-402 https://api.x-402.online/mcp

{
  "mcpServers": {
    "x-402": {
      "url": "https://api.x-402.online/mcp"
    }
  }
}

code --add-mcp '{"name":"x-402","type":"http","url":"https://api.x-402.online/mcp"}'

Some servers ask you to sign in the first time a client connects, or want a key from the people who run them; the server's own docs say which.

Let Claude Code check servers as it adds them

With the free lazaretto-guard plugin installed, when Claude Code adds a server for you or writes one into an MCP config, the plugin reads the server's tools first and asks you if one of our rules matches. Install it, restart Claude Code, then ask it to run the command above.

claude plugin marketplace add jamesdfinance-dev/lazaretto-plugins
claude plugin install lazaretto-guard@lazaretto-plugins

Tools it advertises

search_news extract extract_verified search amazon llm_pro render agent_task understand solve us_brief transcribe proxy_1gb proxy_5gb proxy_20gb screenshot pdf fr_procedures-collectives fr_analyse-immo_partial fr_kyb us_company chain_block chain_gas chain_balance chain_token chain_allowance chain_tx social_search social_thread geo_forward geo_reverse crypto_news eu_mica-check vin_decode wiki_summary url_unwrap markets_prediction chain_ens chain_abi route_directions apify_preflight publish classify callbacks perps_stock-gaps fx_rates stablecoins crypto_market crypto_funding-rate token_price-history site_agent-readiness token_verdict web_tables web_jsonld web_contacts web_prices web_changed email_verify domain_health x402_inspect and 12 more

Tool changes

We compare every full read of this server with the one before. No change in what its tools say has been seen since we started keeping this record on 2026-10-30.

Fingerprint of its tools at our last full read (2026-10-30): 7acd81162de1cb95. A client can hash the tools it is served the same way and compare; the full value and a hash per tool are in this page as JSON.

Run this server? Show the check in your README

The badge reflects the latest weekly read:

[![MCP tool check](https://lazaretto.dev/mcp-registry/online-x-402-mcp/badge.svg)](https://lazaretto.dev/mcp-registry/online-x-402-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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