Top 23 Python json-schema Projects

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1. fastapi

   1 594 98,890 9.9 Python

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

   

   Project mention: Shipping Sovereign SDK: Cryptographic Forensic Receipts and the End of the AI "Prose Tax" | dev.to | 2026-05-29

   The Sovereign SDK is a Python-native framework designed to minimize prose overhead while generating ironclad, cryptographic execution receipts for AI agents, complete with drop-in FastAPI/Starlette ASGI middleware.

2. SaaSHub

   www.saashub.com featured

   SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

   

3. pydantic

   2 190 27,952 9.7 Python

   Data validation using Python type hints

   

   Project mention: pydantic VS ctxure - a user suggested alternative | libhunt.com/r/pydantic | 2026-06-05

4. sqlmodel

   3 27 18,005 9.7 Python

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

   

   Project mention: Show HN: Oxyde – Pydantic-native async ORM with a Rust core | news.ycombinator.com | 2026-03-13

   This sounds great and there's a real gap in the ecosystem for a tool like this. https://sqlmodel.tiangolo.com/ looked promising but it's actually worse than useless because if you add it to your Pydantic models, it disables all validation: https://github.com/fastapi/sqlmodel/issues/52

5. jsonschema

   4 5 4,950 8.9 Python

   An implementation of the JSON Schema specification for Python

   

   Project mention: Framework de Tests Automatisés API avec Pytest: Tutoriel Pratique | dev.to | 2026-05-22

6. datamodel-code-generator

   5 9 3,923 9.8 Python

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

   

7. msgspec

   6 2 3,785 8.6 Python

   A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML (by msgspec)

   

   Project mention: msgspec VS ctxure - a user suggested alternative | libhunt.com/r/msgspec/msgspec | 2026-06-05

8. uvicorn-gunicorn-fastapi-docker

   7 5 2,910 7.9 Python

   Docker image with Uvicorn managed by Gunicorn for high-performance FastAPI web applications in Python with performance auto-tuning.

   

9. apispec

   8 1 1,220 8.3 Python

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

   

10. mashumaro

    9 4 923 7.8 Python

    Fast and well tested serialization library

    

    Project mention: ctxure alternatives - mashumaro, cattrs, pydantic, and msgspec | libhunt.com/r/ctxure | 2026-06-05

11. opendata.cern.ch

    10 17 777 5.7 Python

    Source code for the CERN Open Data portal

    

    Project mention: Castor: CERN Advanced STORage Manager | news.ycombinator.com | 2026-06-04

    Though 5PB of data is freely available via https://opendata.cern.ch/

    With another 4PB available which can be processed on request to extract samples of interest: https://opendata.cern.ch/docs/lhcb-releases-service-to-acces...

12. JSON-Schema-Test-Suite

    11 2 727 8.7 Python

    A language agnostic test suite for the JSON Schema specifications

    

    Project mention: Implementing a JSON Schema Validator from Scratch - Week 0 | dev.to | 2026-01-16

    Write the code for testing using the JSON-Schema-Test-Suite

13. streamlit-pydantic

    12 1 594 9.0 Python

    🪄 Auto-generate Streamlit UI from Pydantic Models and Dataclasses.

    

14. linkml

    13 1 532 9.8 Python

    Linked Open Data Modeling Language

    

15. fastopenapi

    14 6 506 8.4 Python

    FastOpenAPI is a library for generating and integrating OpenAPI schemas using Pydantic v2 and various frameworks (AioHttp, Django, Falcon, Flask, Quart, Sanic, Starlette, Tornado).

    

16. local-llm-function-calling

    15 1 437 7.0 Python

    A tool for generating function arguments and choosing what function to call with local LLMs

    

17. django-jsonform

    16 4 424 6.5 Python

    A better, user-friendly JSON editing form field for Django admin. Also supports Postgres ArrayField.

    

18. check-jsonschema

    17 1 321 8.9 Python

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

    

19. cadwyn

    18 1 301 8.6 Python

    Production-ready Stripe-like API versioning in FastAPI

    

20. hull

    19 13 288 8.8 Python

    The incredible HULL - Helm Uniform Layer Library - is a Helm library chart to improve Helm chart based workflows. (by vidispine)

    

21. apischema

    20 4 240 0.0 Python

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

    

22. jsf

    21 5 196 5.7 Python

    Creates fake JSON files from a JSON schema

    

23. MOSP

    22 10 74 4.2 Python

    A collaborative platform for creating, editing and sharing JSON objects.

    

24. pydantic_schemaorg

    23 3 73 0.0 Python

    Schema.org classes in pydantic

    

    Project mention: Show HN: rstructor, Pydantic+instructor for Rust | news.ycombinator.com | 2025-10-31

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• Building Maintainable Software Systems: Lessons from Open-Source Engineering

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• A note from our sponsor - SaaSHub
  www.saashub.com | 9 Jun 2026

  SaaSHub helps you find the best software and product alternatives Learn more →

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