Buffer GraphQL API

GraphQL discovered

Details

Endpoint: https://api.buffer.com
Spec: introspection
Docs: https://developers.buffer.com/reference.md

Authentication

Buffer API key bearer discovered Get token ↗

Authorization: Bearer <credential>

Sign in to Buffer, then open Settings → API and create a new API key. Copy the key and send it as Authorization: Bearer <API_KEY>. For scripts/CLI, Buffer recommends storing it in BUFFER_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.