oauth.work is the OAuth service for AI agents — MCP and A2A authorization, sender-constrained agent tokens — backed by the full enterprise identity stack: OIDC, SAML, SCIM, and a W3C Verifiable Credentials rail.
We started it because the identity layer for agents was being improvised — shared API keys, bearer tokens with no binding, no consent, no audit. The specs to do it properly already exist; we implemented them to the letter on Cloudflare Workers, then made them fast and multi-tenant.
Cloudflare Workers, Durable Objects, and D1. EdDSA / Ed25519 everywhere for signing. WebCrypto on the hot path. See the field guide for how it all fits together.