Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.
Get an API key
Free tier, no form to fill in. Signing in shares your email address with us — we
store it to create your key and to recognise you if you sign in with another
provider. See our Privacy Policy and
Terms.
openapi: 3.2.0
info:
title: FastRouter Models API
version: 1.0.0
description: OpenAI-compatible LLM gateway API for routing requests across multiple model providers. Model IDs use the provider/model-name format and may support documented suffixes such as :online for web search and :flex for Flex Pricing on compatible models.
servers:
- url: https://api.fastrouter.ai
description: Production API origin
security:
- bearerAuth: []
tags:
- name: Models
paths:
/api/v1/models:
get:
summary: List available models
description: Returns the public model catalog. Model IDs use provider/model-name; supported model-specific suffixes include :online for web search and :flex for Flex Pricing where available.
security: []
externalDocs:
url: https://docs.fastrouter.ai/api-reference/models
responses:
'200':
$ref: '#/components/responses/JsonResponse'
tags:
- Models
operationId: getApiV1Models
x-operation-id-source: derived
components:
schemas:
JsonObject:
type: object
additionalProperties: true
responses:
JsonResponse:
description: JSON response
content:
application/json:
schema:
$ref: '#/components/schemas/JsonObject'
securitySchemes:
bearerAuth:
type: http
scheme: bearer
externalDocs:
description: FastRouter API documentation
url: https://docs.fastrouter.ai