---
id: validate-pyproject-schema-store
version: "2026.8.14"
license: Apache-2.0
license_treatment: permissive
maintenance: active
---

# validate-pyproject-schema-store — A plugin set for validate-pyproject and schema-store.

License: permissive · Maintenance: active · Downloads: 107.1K/mo

## What it is and what it does

validate-pyproject-schema-store is a companion package that bundles a versioned snapshot of SchemaStore schemas for use with the validate-pyproject tool. It allows you to pin a stable set of schema files rather than relying on dynamic schema resolution, which is useful for reproducible builds and pre-commit hooks. The package depends on fastjsonschema for schema validation and supports Python 3.9 through 3.15.

The package is designed to work in two modes: as an injected dependency alongside validate-pyproject (useful for pipx or pre-commit workflows), or as a standalone entry point that can be run directly. Nested schemas are not yet supported—they are currently replaced with generic object types—but the package is actively maintained and receives regular updates.

Use it for:

- Pin schema versions in pre-commit hooks to ensure consistent validation across team members and CI/CD pipelines.
- Use with pipx to run validate-pyproject without managing a separate Python environment.
- Validate pyproject.toml files in build systems where schema updates should be controlled and versioned.
- Integrate into CI/CD workflows where reproducible schema validation is required.

## Worth the install?

AI-flagged interpretation of the facts above — verify before relying.

Provides a versioned snapshot of SchemaStore schemas for use with validate-pyproject, enabling stable, pinned schema validation of Python project configuration files.

Yes, if you use validate-pyproject and want stable, pinned schema validation. The low install friction, active maintenance, permissive license, and lack of known vulnerabilities make it a straightforward addition to validation workflows. The limitation on nested schemas is documented and unlikely to affect most pyproject.toml validation use cases.

## Install

pip install validate-pyproject-schema-store
uv add validate-pyproject-schema-store
poetry add validate-pyproject-schema-store

## Installing validate-pyproject-schema-store

Before you install: Low install friction with a single runtime dependency (fastjsonschema). Active maintenance with a release on 2026-08-14 and support for current Python versions (3.9 through 3.15).

License in practice: Apache-2.0 permissive license allows free use, modification, and distribution with minimal restrictions.

Quickstart:

# Install alongside validate-pyproject
pip install validate-pyproject-schema-store

# Or use directly with pipx
pipx run validate-pyproject-schema-store[all]

# In pre-commit, add to additional_dependencies or use as a repo directly

Requires validate-pyproject to be installed separately (or use the [all] extra); nested schemas are not yet supported and are replaced with "type": "object".

Verify before relying:

- Whether nested schema support is planned or if the current object-type replacement is a permanent limitation.
- How frequently the SchemaStore snapshot is synced and whether manual updates are required.
- Compatibility guarantees with specific validate-pyproject versions.

## Package facts

- License: Apache-2.0 (permissive)
- Python support: supports_current
- Install friction: low
- Maintenance: active
- Downloads: 107.1K/month (top 15,000 on PyPI)
- Known vulnerabilities: none known

## Tags

pyproject.toml validation schemas, schema store for validate-pyproject, pinned schema validation, python project config validation, schemastore snapshot, pyproject schema definitions, schema-validation, pyproject-toml, pre-commit

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