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Open Primitive MCP Server

@writesdavid

Repository

Basic information

Category

Developer Tools

Transports

stdio

Author

writesdavid

Submitted by

David Hamilton

About Open Primitive MCP Server

17 US federal data domains as MCP tools. FDA drugs, EPA water, CMS hospitals, NHTSA cars, BLS jobs, Census demographics, SEC filings, NOAA weather, and more. Signed responses with provenance

#government#federal-data#api#data#health#safety

Open Primitive MCP Server config

Add this server to your MCP-compatible client using the configuration below.

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

Open Primitive MCP Server tools

Tool list not available yet

This listing does not currently have a tool list to display. This does not mean the server has no tools; check its documentation for supported capabilities.

Fetch the live tool list by running this server in a temporary sandbox using the button above.

Overview

What is Open Primitive Mcp?

The MCP server for the Open Primitive Protocol (OPP), providing 13 tools for Claude, Cursor, and MCP-compatible agents. OPP defines how data providers make their data agent-consumable, verifiable, and discoverable through provider manifests, response envelopes, and a standardized query interface.

How to use Open Primitive Mcp?

Run npx open-primitive-mcp to start the server, then query OPP providers using MCP-compatible clients. For example, fetch drug data with parameters like ?name=aspirin and receive a signed envelope containing citations and provenance.

Key features of Open Primitive Mcp

  • 13 tools for Claude, Cursor, and MCP-compatible agents
  • Every response carries domain, source, freshness, confidence, citation, and Ed25519 signature
  • Three conformance levels: Basic, Cited, and Verified
  • Reference implementation covering 16 US federal data domains across 11 agencies
  • SDKs for client consumption, provider implementation, and conformance validation

Use cases of Open Primitive Mcp

  • Agents retrieving FDA adverse event reports with verifiable provenance
  • Data providers wrapping existing APIs in the OPP envelope for agent consumption
  • Validating that a provider’s responses meet OPP conformance levels

Frequently asked questions

1

How do I start the server?

Use `npx open-primitive-mcp` with Node.js installed.

2

What data does the reference implementation provide?

16 US federal data domains across 11 agencies, all Level 3 (Verified) compliant with cryptographic signatures.

3

How is data authenticity guaranteed?

Every response includes an Ed25519 signature with `proof.type: "DataIntegrityProof"`.

4

Can I use OPP for my own data?

Yes – create a `/.well-known/opp.json` manifest, wrap responses in the OPP envelope, and optionally sign with Ed25519.

5

What transport does the server use?

Standard HTTP GET endpoints with predictable query parameters.

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