Create a subscription
Creates a delivery subscription for the authenticated tenant. The tenant is taken from the validated JWT claims only — a tenant_id in the body is ignored.
A webhook subscription is born active and mints a signing secret that is returned exactly once in this response (see signingSecret). A queue subscription (sqs, rabbitmq, eventbridge) is born pending_verification and mints no secret; it stays undeliverable until an outbound credential is supplied and probed via PUT /v1/subscriptions/{id}/credential. Inline sink_config or credential at create is rejected — queue credentials arrive only on the credential PUT.
Authorizations
A bearer JWT issued by plugin-auth (lib-auth). The tenant identity is resolved from the validated token claims; the /v1 surface never reads a tenant from the body, path, or query. Machine callers obtain a token via the plugin-auth client-credentials flow. The /admin surface authorizes against an operator scope and carries no tenant context.
Headers
A client-chosen unique key that makes this mutation at-most-once. A mutation sent without it is rejected before any write with 400 missing_idempotency_key. Reusing the same key with an identical request replays the original response byte-for-byte (with X-Idempotency-Replayed: true); reusing it with a different request body returns 409 idempotency_conflict. To re-drive a corrected request, mint a new key.
Body
The create body. It carries no tenant_id (the tenant is resolved from the JWT). Inline sink_config / credential fields are rejected with 422 inline_sink_config_forbidden — queue credentials arrive only via the credential PUT.
A human label for the subscription. Required and non-blank (whitespace-only is rejected).
"orders-webhook"
The delivery destination kind. webhook posts signed HTTPS requests; pull exposes an inbox read over GET /v1/events; sqs, rabbitmq, and eventbridge fan out to the named queue or bus.
webhook, pull, sqs, rabbitmq, eventbridge The destination address, interpreted per sink kind. For webhook, an https:// URL with no embedded userinfo. For pull, omit it — the server synthesizes a pull://<id> value. For sqs, the https:// queue URL. For rabbitmq, an "<exchange>/<routingKey>" string (exchange required, routing key optional). For eventbridge, the event-bus name / detail-type addressing string. The broker host or AWS region for queue kinds lives in the encrypted credential, not here.
"https://hooks.example.com/lerian"
The event types to deliver. Validated softly against the catalog — an unknown type warns but never blocks onboarding.
Optional schema-major pin. When set, delivery follows the versioned topic for that major; when omitted, the subscription follows the base topic.
1
The plan tier for the subscription.
"standard"
Response
The subscription was created. signingSecret is present only for a webhook sink and is shown exactly once — save it on receipt, it cannot be retrieved later, only rotated.
The create response. signingSecret is present only for a webhook sink and is shown exactly once; it is stored only as ciphertext and is never returned by any read path.
The non-secret projection of a subscription. It never carries the signing secret or any credential material.
The one-time webhook signing secret (write-only). Minted server-side, returned exactly once here, and never retrievable later — only rotated. Absent for non-webhook sinks.
"whsec_9f8c2b1e4a7d6055c3e2f10987ab4c21"

