# CloudEvents JSON Envelope Check

Build-time release reference. Runtime readiness, deployment, payment settlement and external indexing are not evaluated here. Prices are proposed; this file cannot authorize execution or payment.

Inspect one structured CloudEvents 1.0 JSON artifact for required attributes, string restrictions, time/calendar profile, data/data_base64 conflicts, canonical Base64 and primary extension mappings. URI checks are ASCII lexical only. No webhook signatures, transport binding, extension semantics or event authenticity checks.

Release: 0.29.0. Built: 2026-10-06T15:38:00Z.

## Choose for
- Validate a supplied CloudEvents structured webhook envelope before ingestion
- Detect conflicting CloudEvents payload modes and invalid extension attributes

## Outside this profile
- Authenticating webhook senders, binary HTTP bindings, schema fetching or complete URI conformance
- Leap-second validation or secondary structured extension mappings

Proposed nominal USD 0.01 per successful call; payer fees excluded. No verified runtime availability.

- [Exact release contract](/reference/services/cloudevents-envelope-check.json)
- [Input schema](/reference/schemas/cloudevents-envelope-check.input.json)
- [Output schema](/reference/schemas/cloudevents-envelope-check.output.json)
- [Fixed example](/reference/examples/cloudevents-envelope-check.json)
- [Complete HTML reference](/discover/tools/cloudevents-envelope-check)