govcon.dev
govcon.dev is the public site for Tango, a service from MakeGov that unifies U.S. federal procurement and assistance data from sources such as SAM.gov, USAspending, FPDS, Grants.gov, and related systems. It provides structured access to contracts, opportunities, entities, grants, forecasts, and related government contracting data.
govcon.dev exposes a Tango MCP server at `https://govcon.dev/mcp` (OAuth-protected, streamable HTTP) and links to the broader Tango REST API at `https://tango.makegov.com/api` with OpenAPI at `https://tango.makegov.com/api/schema/`; auth is via Tango API key and/or OAuth2 depending on surface.
- Tango MCP serverdetected
- Tango REST APIdiscovered
Sign in at Tango and create an API key from your Tango account/API key area. The docs' easiest path is the quick start on govcon.dev / Quick start, which begins with getting your API key. Use it as Authorization: Api-Key <key> for the HTTP API; the MCP docs and blog also say agents can authenticate with your API key.
Point your MCP client at the server URL and approve access in the browser. The server supports OAuth Dynamic Client Registration (RFC 7591), so the client registers itself automatically — no developer-portal app, client_id, or client_secret to create.
conventions · 1/8 published
- integrations.json✗
/.well-known/integrations.json - llms.txt✗
/llms.txt - API catalog✗
/.well-known/api-catalog - OpenAPI document✗
/api/schema/, /openapi.json, /swagger.json, /api/openapi.json, or /v1/openapi.json - MCP server card✗
/.well-known/mcp/server-card.json - OAuth protected resource✓https://govcon.dev/.well-known/oauth-protected-resource
- Agent card✗
/.well-known/agent-card.json - Agent skills✗
/.well-known/agent-skills/index.json
Publish these signals → /publishing