A pluggable API specification generator. Currently supports the OpenAPI Specification (f.k.a. the Swagger specification).
Features
Supports the OpenAPI Specification (versions 2 and 3)
Framework-agnostic
Built-in support for marshmallow
Utilities for parsing docstrings
Installation
$ pip install -U apispec
When using the marshmallow plugin, ensure a compatible marshmallow version is used:
$ pip install -U apispec[marshmallow]
Example Application
from apispec import APISpec
from apispec.ext.marshmallow import MarshmallowPlugin
from apispec_webframeworks.flask import FlaskPlugin
from flask import Flask
from marshmallow import Schema, fields
# Create an APISpec
spec = APISpec(
title="Swagger Petstore",
version="1.0.0",
openapi_version="3.0.2",
plugins=[FlaskPlugin(), MarshmallowPlugin()],
)
# Optional marshmallow support
class CategorySchema(Schema):
id = fields.Int()
name = fields.Str(required=True)
class PetSchema(Schema):
category = fields.List(fields.Nested(CategorySchema))
name = fields.Str()
# Optional security scheme support
api_key_scheme = {"type": "apiKey", "in": "header", "name": "X-API-Key"}
spec.components.security_scheme("ApiKeyAuth", api_key_scheme)
# Optional Flask support
app = Flask(__name__)
@app.route("/random")
def random_pet():
"""A cute furry animal endpoint.
---
get:
description: Get a random pet
security:
- ApiKeyAuth: []
responses:
200:
content:
application/json:
schema: PetSchema
"""
pet = get_random_pet()
return PetSchema().dump(pet)
# Register the path and the entities within it
with app.test_request_context():
spec.path(view=random_pet)Generated OpenAPI Spec
import json
print(json.dumps(spec.to_dict(), indent=2))
# {
# "paths": {
# "/random": {
# "get": {
# "description": "Get a random pet",
# "security": [
# {
# "ApiKeyAuth": []
# }
# ],
# "responses": {
# "200": {
# "content": {
# "application/json": {
# "schema": {
# "$ref": "#/components/schemas/Pet"
# }
# }
# }
# }
# }
# }
# }
# },
# "tags": [],
# "info": {
# "title": "Swagger Petstore",
# "version": "1.0.0"
# },
# "openapi": "3.0.2",
# "components": {
# "parameters": {},
# "responses": {},
# "schemas": {
# "Category": {
# "type": "object",
# "properties": {
# "name": {
# "type": "string"
# },
# "id": {
# "type": "integer",
# "format": "int32"
# }
# },
# "required": [
# "name"
# ]
# },
# "Pet": {
# "type": "object",
# "properties": {
# "name": {
# "type": "string"
# },
# "category": {
# "type": "array",
# "items": {
# "$ref": "#/components/schemas/Category"
# }
# }
# }
# }
# "securitySchemes": {
# "ApiKeyAuth": {
# "type": "apiKey",
# "in": "header",
# "name": "X-API-Key"
# }
# }
# }
# }
# }
print(spec.to_yaml())
# components:
# parameters: {}
# responses: {}
# schemas:
# Category:
# properties:
# id: {format: int32, type: integer}
# name: {type: string}
# required: [name]
# type: object
# Pet:
# properties:
# category:
# items: {$ref: '#/components/schemas/Category'}
# type: array
# name: {type: string}
# type: object
# securitySchemes:
# ApiKeyAuth:
# in: header
# name: X-API-KEY
# type: apiKey
# info: {title: Swagger Petstore, version: 1.0.0}
# openapi: 3.0.2
# paths:
# /random:
# get:
# description: Get a random pet
# responses:
# 200:
# content:
# application/json:
# schema: {$ref: '#/components/schemas/Pet'}
# security:
# - ApiKeyAuth: []
# tags: []Documentation
Documentation is available at https://apispec.readthedocs.io/ .
Ecosystem
A list of apispec-related libraries can be found at the GitHub wiki here:
Support apispec
apispec is maintained by a group of volunteers. If you’d like to support the future of the project, please consider contributing to our Open Collective:
Professional Support
Professionally-supported apispec is available through the Tidelift Subscription.
Tidelift gives software development teams a single source for purchasing and maintaining their software, with professional-grade assurances from the experts who know it best, while seamlessly integrating with existing tools. [Get professional support]
Security Contact Information
To report a security vulnerability, please use the Tidelift security contact. Tidelift will coordinate the fix and disclosure.
Project Links
Changelog: https://apispec.readthedocs.io/en/latest/changelog.html
Contributing Guidelines: https://apispec.readthedocs.io/en/latest/contributing.html
License
MIT licensed. See the bundled LICENSE file for more details.
Release files for apispec 6.10.0
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| apispec-6.10.0.tar.gz | 80.6 kB | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| apispec-6.10.0-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 111.9 kB
Release files / apispec-6.10.0.tar.gz
| Download URL | apispec-6.10.0.tar.gz |
|---|---|
| Size | 80.6 kB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
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|
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| Download URL | apispec-6.10.0-py3-none-any.whl |
|---|---|
| Size | 31.3 kB |
| Tags | Python 3 |
|
SHA-256 checksum How to use checksums |
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|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/6.1.0 CPython/3.13.7
|
Provenance
Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.
PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Mar 6, 2026.
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