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CHCK Partner APIIntegrate grading into your platform

Bearer-authenticated REST API, webhooks, and presigned grade assets — documented with OpenAPI 3.1.

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API reference
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Dashboard API keys

Create and revoke keys from the partner dashboard. Tokens are shown once and stored as SHA-256 hashes.

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Webhook notifications

Register success and failure URLs. Fetch full results with GET /v1/gradings/{id} after each event.

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Cards API

List and fetch user cards with catalog metadata, presigned images, and grade history.

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OpenAPI 3.1

Machine-readable spec at /openapi.yaml powers the interactive Scalar reference and client codegen.

CHCK Partner API

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