Tango REST API

REST discovered

Details

URL: https://tango.makegov.com/api
Docs: https://docs.makegov.com/api-reference/

Authentication

Tango API key api_key discovered Get key ↗

Authorization: Api-Key <credential>

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.

OAuth 2.0 oauth2 discovered

Authorization: Bearer <credential>

OAuth 2.0 — self-onboarding

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.