A queue is not delivery proof
Moving a request to a dead-letter queue confirms failure handling, not whether the CRM accepted or stored the lead.
Webhook dead-letter queue for leads
Recover dead-lettered lead webhooks without creating duplicates.
Use stable event identity, bounded delivery attempts, metadata-only failure records, and explicit replay to recover a lead webhook safely.
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A successful automation run is not proof of delivery.
A generic dead-letter queue can preserve failed messages, but it does not automatically prove whether the CRM accepted an earlier attempt or prevent a replay from creating a duplicate. Keeping complete lead payloads in another queue also expands the sensitive data that operators must secure. A lead-delivery recovery path needs one durable event identity, a final failure state, destination evidence, and a replay that must match the original payload and destination fingerprints.
Authorized source payload -> LeadProof bounded attempts -> metadata-only failed receipt -> explicit fingerprint-verified replayBlind replay can duplicate contacts
A resend with a new identity can create another CRM record when an earlier attempt completed late.
Payload retention expands risk
Copying complete lead bodies into every recovery system increases the private data that must be governed.
Implementation
Put LeadProof in the delivery path.
Keep the tools that create and process the lead. Standardize only the fragile handoff between them.
Open sandbox instructions →- Assign one opaque, non-sensitive event ID when the form, call, booking, or agent output is created.
- Send the lead through LeadProof with that ID as the Idempotency-Key and the authorized CRM webhook as destination.
- Treat delivery_failed and its receipt ID as the metadata-only dead-letter record while the authorized source retains the original payload.
- Replay with the same key, body, destination, and X-LeadProof-Replay: true so fingerprint mismatches are rejected before another CRM attempt.
POST
https://leadproof.jessesay.chatgpt.site/api/v1/leadsAuthorization: Bearer lp_live_your_key
Idempotency-Key: stable-source-lead-id
Content-Type: application/json
{
"destination": "https://your-crm.example/webhook",
"name": "Alex Morgan",
"email": "alex@example.com",
"source": "webhook dlq"
}Questions
What teams ask before adding LeadProof.
Does LeadProof store the dead-lettered lead body?
No. LeadProof intentionally retains operational metadata and cryptographic fingerprints rather than the complete production payload. The authorized source system retains the body for explicit replay.
What makes a replay safe?
The original Idempotency-Key must be reused and the submitted payload and destination fingerprints must match the failed event before another delivery is attempted.
Can this replace a general-purpose message queue?
No. Keep a durable source or queue for workload orchestration. LeadProof specializes in the final lead-delivery boundary, bounded retries, destination response evidence, and duplicate-safe replay.
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