mcp server

open-internet-mcp

One MCP server. 26 keyless public APIs. The crown jewels of the open internet, exposed as agent tools.

artchristech/open-internet-mcpcommunitylistedunreviewed

Use tool

Set up

Runs on your computer. Pick your agent and operating system.

Before you start

Node.js 20 or newer

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

{
  "mcpServers": {
    "open-internet-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "open-internet-mcp"
      ]
    }
  }
}

same format Cursor, GitHub Copilot CLI, Junie, JetBrains AI Assistant, Augment (Auggie CLI), Factory Droid, Kiro, Devin CLI +12

Values in angle brackets are placeholders. Restart Claude Desktop after editing its config.Claude Desktop docs

README

synced Oct 23, 2026

open-internet-mcp

One MCP server. 26 keyless public APIs. The crown jewels of the open internet, exposed as agent tools.

No API keys. No accounts. No rate-limit dance. Drop it into any MCP-aware client and your agent gains read access to Wikidata, OpenStreetMap, SEC EDGAR, OpenAlex, public Ethereum, GitHub search, Certificate Transparency, USGS, openFDA, and more — twenty-six tools total, all behind a single allowlisted, size-capped, timeout-bounded fetcher.

Install

npx open-internet-mcp        # once published

Or run from source:

git clone <this repo> && cd open-internet-mcp
npm install
npm run build
npm start

Wire it into Claude Desktop / Claude Code

~/Library/Application Support/Claude/claude_desktop_config.json (Mac):

{
  "mcpServers": {
    "open-internet": {
      "command": "npx",
      "args": ["-y", "open-internet-mcp"]
    }
  }
}

For Claude Code: claude mcp add open-internet -- npx -y open-internet-mcp.

Tools

Tool	What it does
`wikidata_sparql`	Read-only SPARQL over Wikidata
`wikipedia_summary`	Lead-section summary by title
`wikipedia_search`	Full-text search of articles
`overpass_query`	Query OpenStreetMap features (Overpass QL)
`nominatim_geocode`	Forward geocode place → lat/lon
`nominatim_reverse`	Reverse geocode lat/lon → address
`sec_edgar_company`	All filings for a US public company by CIK
`openalex_search`	Search 250M+ scholarly works
`arxiv_search`	Search arXiv preprints
`pubmed_search`	Search MEDLINE/PubMed
`crossref_doi`	DOI → canonical metadata + references
`oeis_lookup`	Online Encyclopedia of Integer Sequences
`eth_rpc`	Read-only Ethereum JSON-RPC (allowlisted methods)
`web3_identity`	Resolve ENS / Lens / Farcaster identity
`open_meteo_forecast`	Hourly + daily weather for any lat/lon
`usgs_quakes`	Recent earthquakes from USGS catalog
`nws_alerts`	Active US weather alerts
`openfda_drug_events`	FAERS adverse-event reports
`clinicaltrials_search`	ClinicalTrials.gov v2
`github_search`	Search GitHub repos / code / issues / users
`crt_sh_certs`	Every TLS cert ever issued for a domain
`rdap_domain`	Modern WHOIS via RDAP
`dns_doh`	DNS-over-HTTPS lookup (Cloudflare)
`ipfs_cat`	Read an IPFS CID via public gateway (256KB cap)
`bluesky_search`	Search public Bluesky / ATProto posts
`software_heritage_origin`	Look up an origin in the SH archive

Security model

Every tool routes through safeFetch with:

Host allowlist — each tool declares the exact hostname(s) it may contact. SSRF-resistant; user inputs never determine the destination host.
Timeout — 15s default, 25–30s for Overpass / IPFS / SPARQL.
Size cap — 512KB per response (256KB for IPFS), streamed and truncated.
No embedded credentials — URLs with user:pass@ are rejected.
Identifying User-Agent — required by NWS, Nominatim, Crossref policies.
Read-only enforcement — eth_rpc blocks signing / admin / debug / subscription methods; wikidata_sparql blocks INSERT/DELETE/DROP/CLEAR/LOAD/CREATE/COPY/MOVE/ADD.
Strict input schemas — every argument is parsed by Zod before reaching the network. Bad enums, oversized payloads, and control characters are rejected with a structured error.

The server speaks stdio JSON-RPC only; it opens no listening sockets and stores no state.

Smoke test

npm run build && npm run smoke

Hits live endpoints (DNS, ETH RPC, Wikidata) and exercises the negative paths.

License

MIT.