ngrok AI Gateway OpenAI API

openapi: 3.1.0
info:
  title: ngrok AI Gateway Anthropic OpenAI API
  description: 'The ngrok AI Gateway exposes drop-in compatible REST endpoints

    for OpenAI''s Chat Completions API and Anthropic''s Messages API.

    Requests are authenticated with an AI Gateway API key issued by

    ngrok, and the gateway forwards calls to managed upstream

    providers using ngrok''s own provider credentials.

    '
  version: v1
servers:
- url: https://{gatewayDomain}
  description: Per-account ngrok AI Gateway endpoint
  variables:
    gatewayDomain:
      default: your-ai-gateway.ngrok.app
      description: Your ngrok AI Gateway hostname
tags:
- name: OpenAI
paths:
  /v1/chat/completions:
    post:
      summary: OpenAI-compatible chat completions
      description: 'Sends a chat completion request in OpenAI''s Chat Completions

        format. The gateway routes the request to the configured

        upstream model provider.

        '
      operationId: createChatCompletion
      tags:
      - OpenAI
      security:
      - bearerAuth: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                model:
                  type: string
                messages:
                  type: array
                  items:
                    type: object
                    properties:
                      role:
                        type: string
                      content:
                        type: string
                stream:
                  type: boolean
              required:
              - model
              - messages
      responses:
        '200':
          description: Chat completion response
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: 'OpenAI-style authentication. Send the AI Gateway API key

        (format `ng-xxxxx-g1-xxxxx`) as `Authorization: Bearer <key>`.

        '
    apiKeyAuth:
      type: apiKey
      in: header
      name: x-api-key
      description: 'Anthropic-style authentication. Send the AI Gateway API key

        (format `ng-xxxxx-g1-xxxxx`) in the `x-api-key` header.

        '