flasgger/flasgger

Health v2 · maintenance only

Adoption not part of the score

3744 stars · 525 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Flasgger is a Flask extension that extracts OpenAPI (Swagger) specifications from Flask views using docstrings, YAML files, dictionaries, or Marshmallow schemas. It embeds Swagger UI at /apidocs and can validate incoming request data against the defined schemas.

Use cases

• generate OpenAPI docs for a Flask API
• add Swagger UI to my Flask endpoints
• document Flask-RESTful resources with YAML specs
• validate POST request bodies against Marshmallow schemas
• define API specs in docstrings instead of separate files
• serve interactive API documentation from a Flask app

When to choose

• you have a Flask or Flask-RESTful API and want OpenAPI docs with minimal setup
• you want embedded Swagger UI for exploring and testing endpoints
• you prefer defining specs via docstrings, YAML, dicts, or Marshmallow schemas
• you want request validation driven by the same spec

When to avoid

• your API is not built on Flask
• you need OpenAPI 3.x-first tooling with advanced features other generators provide
• you use FastAPI or Django, which have their own spec ecosystems
• you need a framework-agnostic spec generator like apispec

Facets

plugin · maturity active

api-framework api-documentation middleware web-development apis backend documentation python flask-extension openapi swagger-ui rest-api marshmallow request-validation web-server

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