# Dependency Preflight

Dependency Preflight evaluates exact npm and PyPI package versions before installation and returns a structured ALLOW, REVIEW, or BLOCK decision with findings and source evidence.

- Price: 0.02 USDC per request
- Paid operation: `POST https://api.preflightstack.com/v1/dependency-preflight`
- Batch size: up to 10 exact package versions from one ecosystem
- Docs: https://api.preflightstack.com/docs
- OpenAPI: https://api.preflightstack.com/openapi.json
- Health: https://api.preflightstack.com/health
- Agentic Market: https://agentic.market/services/api-preflightstack-com

## Workflow

Submit exact versions, review the returned findings and evidence, then continue on ALLOW, pause for human review on REVIEW, or stop the requested installation on BLOCK.

## Good fits

- Evaluate the exact npm or PyPI version an agent wants to introduce before changing a lockfile.
- Check up to ten exact versions from one ecosystem in a bounded batch.
- Supply findings and source evidence for the human-review step when a result is REVIEW.

Dependency Preflight supplies informational automation inputs, not a security guarantee or legal opinion. The live documentation and OpenAPI contract are authoritative.