Cognigy.AI idempotency key POST returning 422 on hash collision policy verification

Problem

We’re building the key generator for automated Cognigy management and hitting a wall on the atomic POST for idempotency key creation. Tracking generation latency and duplicate detection rates for idempotency efficiency works fine. The request needs to construct generation payloads with request fingerprint references, hash algorithm matrices, and storage TTL directives. We’ve tried validating generation schemas against the idempotency store constraints and maximum key retention limits to prevent storage exhaustion failures. Synchronizing generation events with external audit logs via callback handlers for alignment is also in the stack. The flow should handle format verification and automatic collision detection triggers for safe generation iteration. We implemented generation validation logic using hash collision checking and expiration policy verification pipelines. This ensures reliable duplicate prevention and prevent processing loops during webhook scaling. The core POST keeps failing though.

Environment specs and steps tried:

  • Node.js 20.11 with native fetch
  • Cognigy.AI v2 idempotency endpoint
  • Payload includes SHA-256 fingerprint reference and 300s TTL
  • Retention limit set to 5000 keys in tenant config
  • Callback handler registered for audit log sync
  • Collision detection trigger enabled in tenant settings

Code

const response = await fetch('https://api.cognigy.ai/v2/idempotency/keys', {
 method: 'POST',
 headers: {
 'Content-Type': 'application/json',
 'Authorization': `Bearer ${process.env.COGNIGY_TOKEN}`,
 'X-Request-ID': crypto.randomUUID()
 },
 body: JSON.stringify({
 fingerprint: req.headers['x-webhook-signature'],
 hashAlgorithm: 'SHA-256',
 ttlSeconds: 300,
 collisionPolicy: 'detect-and-reject',
 auditCallbackUrl: 'https://internal-logs.example.com/cognigy/idempotency'
 })
});

Error

Server throws 422 Unprocessable Entity. The response payload points straight to the retention limit validation and collision policy verification pipeline. It says the generation schema fails against the idempotency store constraints. We checked the maximum key retention limits and the hash collision checking logic looks correct. The expiration policy verification pipeline seems to be rejecting the TTL directive even though it’s within range. The storage exhaustion prevention rules trigger immediately. We don’t see a clear path around the validation rejection.

{
 "status": 422,
 "code": "IDEMPOTENCY_STORE_CONSTRAINT_VIOLATION",
 "message": "Generation payload validation failed. Hash collision checking and expiration policy verification pipeline rejected request. Storage exhaustion prevention rules triggered.",
 "details": {
 "retentionLimit": 5000,
 "currentCount": 4999,
 "ttlDirective": 300,
 "collisionDetection": "active"
 }
}

Question

How do we structure the Node.js request to pass the generation validation logic without tripping the storage exhaustion failures. The atomic POST needs format verification and automatic collision detection triggers for safe generation iteration. We’re exposing a key generator and the duplicate prevention logic is blocking the webhook scaling. Need the correct payload shape for the hash algorithm matrices and storage TTL directives before the tenant locks