Open Primitive Mcp

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

FAQ from Open Primitive Mcp

How do I start the server?

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

What data does the reference implementation provide?

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

How is data authenticity guaranteed?

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

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.

What transport does the server use?

Standard HTTP GET endpoints with predictable query parameters.