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The Prism V0 inference API is described by an OpenAPI 3.1 document:
  • Download openapi.yaml
  • Base URL: https://api.prisminference.com
  • Authentication: Authorization: Bearer or x-api-key
Use the specification with API explorers, contract validators, and SDK generators. It includes:
  • POST /v1/chat/completions
  • GET /v1/models
  • GET /v1/models/{model}
  • POST /v1/messages
  • POST /v1/messages/count_tokens
The contract models the shared fields used by Prism. OpenAI and Anthropic SDKs may expose additional compatible fields as their upstream formats evolve.
Last modified on September 9, 2026