Schema Validation Python Packages

gqlalchemy

GQLAlchemy is a library developed with the purpose of assisting in writing and running queries on Memgraph. GQLAlchemy supports high-level connection to Memgraph as well as modular query builder.

arnio

C++ accelerated data quality toolkit for Python: CSV parsing, cleaning, schema validation, profiling, and pandas integration.

json-structure

Official SDKs for JSON Structure schema and instance validation

agent-friend

MCP schema linter & quality grader — validate, audit, optimize, grade (A+ to F). Also: @tool exports to OpenAI, Claude, Gemini, MCP.

typedframe

Typed wrappers over pandas DataFrames with schema validation

metamessage

MetaMessage（mm）是一個結構化數據交換協議。自描述、自約束、自示例，實現了無損數據交換，是一種原生適配 AI + 人類 + 機器的下一代通用協議。

cruxial

The action layer for AI agents. Proof of what your agent actually did, not what it claimed.

pydictable

Python object serializer/deserializer and schema validator with extendability!

driftbrake

A schema contract guard for data pipelines. Detects, classifies, and reports schema changes in PostgreSQL databases.

hyperion-sdk

Headless ETL/ELT & data-pipeline SDK for Python: a typed data catalog with Avro schemas and swappable storage/queue/cache backends — same code runs locally or on AWS.

mcp-json-yaml-toml

A structured data reader and writer like 'jq' and 'yq' for AI Agents

phx-filters

Opinionated schema validation for Python - chain type-safe filters with | like UNIX pipes

logging-objects-with-schema

This library provides a logger subclass built on top of the standard `logging` module that strictly controls additional `extra` fields using a JSON schema.

stof

Data Runtime. JSON that runs.

se-manifest-schema

Canonical SE_MANIFEST.toml schema and validation for the Structural Explainability ecosystem.

envcontract

The contract for your .env — validate it, catch drift, never commit a secret. 100% local.

pdbe-mmcif-validator

Real-time VSCode extension and standalone Python script for validating mmCIF/CIF files against the PDBx/mmCIF dictionary or any CIF dictionary.

confident-extract

Deterministic structured extraction from noisy LLM/OCR output. Zero LLM round-trips, microsecond latency, confidence score on every result. msgspec · Pydantic · dataclasses.

py-toolguard

The "Cloudflare for AI Agents". 7-layer security interceptor, real-time observability dashboard, and automated reliability testing for MCP and AI tool chains. Prevent hallucinations, prompt injection, and destructive tool calls.

rpc-python-toolkit

Framework-agnostic Python JSON-RPC 2.0 toolkit with Safe Mode interoperability.

nacho-python

Lightweight, schema-first dynamic configuration service for Python

image-text-structurizer

A new package that processes user-provided text descriptions of images and returns structured, validated outputs using pattern matching. It ensures that the generated content adheres to a predefined f

llm-promptguard

Reliable, structured, production-safe LLM outputs with schema validation and auto-repair

tool-scan

Security scanner for MCP (Model Context Protocol) tools