INBOUND WEBHOOK ROUTING

Receive webhooks from your providers at a single point.

Payments, e-commerce, code hosting, telephony, CRM — webhooks from your common SaaS platforms + custom HMAC. SendNomi verifies the signature, applies retry and idempotency, and forwards a clean payload to your own endpoint URL.

Three foundations

Signature · Forwarding · Idempotency.

Rather than writing the webhook handler yourself, use a proven router — the edge cases are already solved.

Signature verification

Every provider has its own HMAC scheme. We take on the tedious part — forged payloads stop at 401, genuine payloads are forwarded cleanly to your endpoint.

Category count6 built-in + customHMAC algorithmsSHA-256, SHA-1Replay protectionTimestamp + nonce

Forwarding to your endpoint URL

The webhook payload from the provider is forwarded to your endpoint. It normalizes headers, transforms the payload (optional), and retries with 3 attempts + exponential backoff.

Forward retries3 attemptsBackoffExponential + jitterTimeout30 seconds

Idempotency + dedup

If the same event ID arrives twice, it is processed once. In redelivery environments, your customer faces no risk of duplicate email / billing.

Dedup TTL24 hoursKey sourceEvent ID or sha(payload)Processing auditEvery event in the log
6 BUILT-IN CATEGORIES

Common SaaS providers + custom HMAC.

The most common HMAC schemes are built in for every category. For a specific provider list, the support line confirms within 1 business day.

Payments & billing Payment success / failure, subscription lifecycle, invoice issuance HMAC-SHA256 signed header
Code hosting & CI Push, pull request, issue, release HMAC-SHA256 signed header
Telephony & SMS SMS DLR, call status, messaging alerts HMAC signed (URL-aware)
E-commerce platforms Order creation, customer update, fulfillment HMAC-SHA256 signed header
CRM & field tools Lead, deal, ticket, customer lifecycle HMAC or OAuth bearer
Custom HMAC Your own shared-secret webhook Your own secret + header name
REAL WORKFLOWS

3 common scenarios.

A webhook arrives → SendNomi turns it into an automatic action → the customer is unaffected.

Payment succeeded → automatic invoice email

  1. Your payment provider sends the checkout-completed event to SendNomi
  2. The signed header is verified with HMAC
  3. Your endpoint URL: collected at a single point via the webhook router
  4. SendNomi automation: a transactional email with the invoice template to customer.email
  5. The customer receives the invoice in their inbox within 5 seconds

E-commerce order → segment + welcome series

  1. The order-created webhook arrives at SendNomi from your e-commerce platform
  2. The HMAC-SHA256 signature is verified
  3. Customer auto-upsert into SendNomi contacts
  4. If the order count is 1, the contact is added to the "first_purchase" segment
  5. A 3-email welcome series automation is triggered

New release → changelog announcement

  1. A code hosting / CI release event arrives at SendNomi
  2. The signed header is verified with HMAC
  3. Markdown → HTML render from the release body
  4. A marketing campaign to the changelog-subscribers segment
  5. One-click unsubscribe (RFC 8058) included
SETUP IN 5 MINUTES

Live in 4 steps.

# 1. Create an inbound endpoint in the SendNomi panel
#    Inbound webhooks → "New endpoint"
#    Choose the source type (payments / e-commerce / code hosting / custom)
#    Paste the shared secret

# 2. Enter the SendNomi endpoint URL in your provider's webhook settings:
#    https://app.sendnomi.com/api/webhooks/inbound/<account-id>/<source>

# 3. Verify 200 OK with a test event
curl -X POST https://app.sendnomi.com/api/webhooks/inbound/<account-id>/test \
  -H "Content-Type: application/json" \
  -H "X-Signature: sha256=<signature>" \
  -d '{"event":"test","payload":{...}}'

# 4. Set the forward URL: your own backend or SendNomi automation

For local testing, fire a mock event with the "Test event" button in the panel and see the response inline.

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