Webhooks Plugin

Outbound webhook dispatcher with retry, HMAC signing, and dead-letter queue. Free, MIT licensed.

Install

nself plugin install webhooks

What It Does

Delivers outbound HTTP webhooks to external URLs based on Hasura event triggers. Signs payloads with HMAC-SHA256 for verification. Handles retries with exponential backoff, maintains a dead-letter queue for failed deliveries, and logs all attempts.

Configuration

Env Var	Default	Description
WEBHOOKS_PORT	3060	Webhooks service port
WEBHOOKS_SECRET	—	Default HMAC signing secret
WEBHOOKS_MAX_RETRIES	5	Max delivery attempts
WEBHOOKS_TIMEOUT	30s	HTTP delivery timeout

Ports

Port	Purpose
3060	Webhooks service REST API

Database Tables

2 tables added to your Postgres database:

• np_webhooks_endpoints, registered webhook destinations
• np_webhooks_deliveries, delivery log and dead-letter queue

Nginx Routes

None, webhooks service is internal only.

API

GET  /health                  — Health check
GET  /endpoints               — List webhook endpoints
POST /endpoints               — Register an endpoint
DELETE /endpoints/{id}        — Remove endpoint
POST /deliver                 — Trigger manual delivery
GET  /deliveries              — Delivery history
GET  /deliveries/failed       — Dead-letter queue
POST /deliveries/{id}/retry   — Retry failed delivery