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OpenAPI Specification

openapi: 3.2.0
info:
  title: Featherless AI Serverless Inference Account Models API
  version: '1.0'
  description: Faithful capture of the publicly documented, OpenAI-compatible serverless inference API operated by Recursal AI, Inc. under the Featherless AI brand. Only endpoints, methods, the Bearer security scheme, and parameters that Featherless publishes in its developer documentation are represented here; request/response schemas are intentionally minimal and honest rather than exhaustive. Base URL and auth per https://featherless.ai/docs/quickstart-guide.
  x-generated: '2026-07-21'
  x-method: generated
  x-source: https://featherless.ai/docs/api-overview-and-common-options
  x-note: Featherless does not publish a machine-readable OpenAPI document (api.featherless.ai/openapi.json -> 404); this is an API Evangelist capture of the documented REST surface, not the provider's own specification.
servers:
- url: https://api.featherless.ai/v1
  description: Featherless AI production inference endpoint (OpenAI-compatible)
security:
- bearerAuth: []
tags:
- name: Models
  description: Model catalog and metadata
paths:
  /models:
    get:
      tags:
      - Models
      operationId: listModels
      summary: List available models
      description: Return the catalog of open-weight models available for inference (thousands of models from Hugging Face).
      responses:
        '200':
          description: A list of model objects
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ModelList'
        '401':
          $ref: '#/components/responses/Unauthenticated'
components:
  schemas:
    Model:
      type: object
      properties:
        id:
          type: string
        object:
          type: string
    ModelList:
      type: object
      properties:
        object:
          type: string
        data:
          type: array
          items:
            $ref: '#/components/schemas/Model'
    Error:
      type: object
      properties:
        error:
          type: object
          properties:
            message:
              type: string
            type:
              type: string
            code:
              type: string
  responses:
    Unauthenticated:
      description: API key is invalid or unrecognized.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: 'Featherless API key supplied as an HTTP Bearer token (Authorization: Bearer FEATHERLESS_API_KEY). Keys are created in account settings.'