# LicenChain Developers

> Documentation Preview — target API contract; endpoints may not be operational. LicenChain Integrations API target contract: Sellers submit licensing requests to obtain Buyer onboarding links, then verify issued licenses from their own backend before granting access.

Key rules: server-side Seller API key only (webhooks are authenticated by LC-Signature HMAC instead); Idempotency-Key on licensing requests; one request issues one corporate license, optional quantity is the seat allowance within it; net amount excluding VAT as a two-decimal string; UTC timestamps; a 200 verification response is not a grant — only valid === true is; identity and user assignment stay in the Seller delivery system.

## Agent-readable guides

- [Submit a licensing request](/api/docs/md/licensing-requests.md): request, response, idempotency and errors
- [Verify a license](/api/docs/md/license-verification.md): fail-closed decision rule and response fields
- [Licensing lifecycle](/api/docs/md/licensing-lifecycle.md): onboarding.completed vs licence.issued, webhook signing
- [MCP and agent access control](/api/docs/md/mcp-agent-access-control.md): identity vs license responsibilities

## API contract

- [OpenAPI 3.1 target spec](/openapi-target.json): target contract (not a description of deployed endpoints)
- [API reference](/api/docs/reference/): interactive reference (requests disabled)

## Documentation

- [Overview](/api/docs/)
- [Quickstart](/api/docs/quickstart/)
- [Authentication](/api/docs/authentication/)
- [Errors and retries](/api/docs/errors/)
- [Changelog](/api/docs/changelog/)