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pydantic

Data validation using Python type hints

pydantic-core

Data validation using Python type hints

jsonschema

An implementation of the JSON Schema specification for Python

referencing

Cross-specification JSON referencing (JSON Schema, OpenAPI, and the one you just made up!)

jsonschema-specifications

Support files exposing JSON from the JSON Schema specifications to Python

fastapi

FastAPI framework, high performance, easy to learn, fast to code, ready for production

msgspec

A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML

mashumaro

Fast and well tested serialization library

json-repair

Repair malformed JSON from LLMs, APIs, logs, and user input in Python.

sqlmodel

SQL databases in Python, designed for simplicity, compatibility, and robustness.

apispec

A pluggable API specification generator. Currently supports the OpenAPI Specification (f.k.a. the Swagger specification)..

datamodel-code-generator

Python data model generator (Pydantic, dataclasses, TypedDict, msgspec) from OpenAPI, JSON Schema, GraphQL, and raw data (JSON/YAML/CSV).

cadwyn

Production-ready Stripe-like API versioning in FastAPI

outlines-core

Faster structured generation

check-jsonschema

A CLI and set of pre-commit hooks for jsonschema validation with built-in support for GitHub Workflows, Renovate, Azure Pipelines, and more!

jschema-to-python

Generate source code for a set of Python classes from a JSON schema.

marshmallow-jsonschema

JSON Schema Draft v7 (http://json-schema.org/) formatting with marshmallow

py-openapi-schema-to-json-schema

Python port of https://github.com/mikunn/openapi-schema-to-json-schema

jsf

Creates fake JSON files from a JSON schema

json-strong-typing

Auxiliary services for working with Python type annotations.

scrapegraph-py

Official Python SDK for the ScrapeGraph AI API. Smart scraping, search, crawling, markdownify, agentic browser automation, scheduled jobs, and structured data extraction

sphinx-jsonschema

A Sphinx extension to display a JSON Schema

jschon

An object-oriented JSON Schema implementation for Python.

apischema

JSON (de)serialization, GraphQL and JSON schema generation using Python typing.