What is the OpenAPI Generator Online base URL?

The OpenAPI Generator Online base URL is https://api.openapi-generator.tech

Does OpenAPI Generator Online have a free tier?

Yes. Fully free and open-source

OpenAPI Generator Online

by OpenAPI Generator Free tier

Online API client and server SDK generator supporting 40+ languages and frameworks. Generate client libraries or server stubs from any OpenAPI specification.

developercodegenopenapisdk

Quick Reference

Base URL https://api.openapi-generator.tech Auth type none Auth header # No auth required Rate limit See documentation Pricing Free tier available Free quota Fully free and open-source Documentation https://github.com/OpenAPITools/openapi-generator Endpoint status Live — HTTP 200 — endpoint is accessible4.38s (checked Mar 29, 2026) Builder score C 64% builder-friendly

Pricing

Latency

Depth

Authentication

No authentication required

# No auth required

Pricing

Model freemium Starting price Free tier available Free quota Fully free and open-source

Free public API; also self-hostable as an open-source tool.

Key Endpoints

Method	Path	Description
GET	`/api/gen/clients`	Get supported client languages
GET	`/api/gen/clients/{language}`	Get options for a client language
POST	`/api/gen/clients/{language}`	Generate a client SDK
GET	`/api/gen/servers`	Get supported server frameworks
GET	`/api/gen/servers/{framework}`	Get options for a server framework
POST	`/api/gen/servers/{framework}`	Generate a server stub
GET	`/api/gen/download/{fileId}`	Download a generated file

Sample Request

curl -X POST 'https://api.openapi-generator.tech/api/gen/clients/python' \
  -H 'Content-Type: application/json' \
  -d '{"openAPIUrl":"https://petstore.swagger.io/v2/swagger.json"}'

Sample Response

{"code":"abc123","link":"https://api.openapi-generator.tech/api/gen/download/abc123"}

Data sourced from API Map. Always verify pricing and rate limits against the official OpenAPI Generator documentation.