fpds-mcp
x402-paid MCP server for the U.S. Federal Procurement Data System (FPDS-NG) — every federal contract action since 2001, no signup, no API key.
Live: https://fpds-mcp.mtree.workers.dev
Endpoints
| Endpoint | Description | Price |
|---|---|---|
POST /v1/contracts/search | FPDS contract actions by keyword / agency code / NAICS / signed-date window | $0.04 |
POST /v1/contracts/by_vendor | Recent FPDS contract actions for a vendor + aggregate (total obligated $, distinct agencies, distinct NAICS) | $0.05 |
All paid endpoints settle USDC on Base via x402. First call returns HTTP 402 with the EXACT-scheme envelope; sign X-PAYMENT and retry.
Discovery surfaces (unpaid)
/.well-known/agent-card.json— Google A2A AgentCard/.well-known/mcp.json— MCP server manifest/.well-known/ai-plugin.json— OpenAI plugin manifest/openapi.yaml— OpenAPI 3.1 spec/agent-discovery— human-friendly landing/mcp— MCP Streamable HTTP transport (JSON-RPC 2.0)
Quick start
# 1) Probe the 402 envelope:
curl -i -X POST https://fpds-mcp.mtree.workers.dev/v1/contracts/by_vendor \
-H 'content-type: application/json' \
-d '{"vendor":"Lockheed Martin","limit":10}'
# 2) Settle X-PAYMENT (USDC on Base, payTo as advertised) and retry.
Sibling service
For live SAM.gov opportunities + USASpending.gov awards see procure-mcp.
Run locally
npm install
npx wrangler dev
Set PAY_TO_ADDRESS (and optional CDP/facilitator credentials) via wrangler secret put before wrangler deploy.
License
MIT — Money Tree.