codex-gateway
Installation
SKILL.md
Codex Machine Payment Protocol (MPP)
Use this skill when the Codex Supergraph returns a 402 Payment Required response. The MPP challenge flow lets you pay per query without needing an API key. For higher volume, get an API key at dashboard.codex.io/signup — see docs.codex.io for details.
| HTTP endpoint | https://graph.codex.io/graphql |
| Credential header | Authorization: Payment <base64url-credential> |
How it works
- Send a GraphQL query (no credential).
- Server returns
402 Payment RequiredwithWWW-Authenticate: Payment ...challenges. - Client solves one challenge and retries with
Authorization: Payment <credential>. - Server returns GraphQL data +
Payment-Receiptheader.