n8n ➔ Supabase Webhook Pipeline Specification Webhook Specification, Headers & Security

Technical Integration Summary

Technical guide for receiving and processing automated n8n ➔ Supabase Webhook Pipeline Specification event notifications. Follow these security guidelines to prevent unauthorized webhook calls.

Supported Events: resource.created resource.updated resource.deleted event.triggered

Authentication & Request Headers

Security validation specs for n8n ➔ Supabase Webhook Pipeline Specification endpoints:

X-n8n➔SupabaseWebhookPipelineSpecification-Signature: t=1789764056,v1=fd6d9c2b24e863cadf194eaf

Signature Verification Implementations

Node.js (Express)

const crypto = require('crypto');
const expected = crypto.createHmac('sha256', secret).update(rawBody).digest('hex');
const isValid = crypto.timingSafeEqual(Buffer.from(expected), Buffer.from(signature));

Python (Flask / FastAPI)

import hmac, hashlib
expected = hmac.new(secret.encode(), raw_body, hashlib.sha256).hexdigest()
is_valid = hmac.compare_digest(expected, incoming_sig)

Sample Event Payload (resource.created)

{
  "id": "evt_n8n-to-supabase.html_51509",
  "event": "resource.created",
  "created_at": 1789764056,
  "data": {
    "resource_id": "res_324",
    "status": "active"
  }
}

cURL Request Simulation

curl -X POST https://your-domain.com/webhook/n8n-to-supabase.html \
  -H "Content-Type: application/json" \
  -H "X-n8n➔SupabaseWebhookPipelineSpecification-Signature: t=1789764056,v1=fd6d9c2b24e863cadf194eaf" \
  -d '{"id": "evt_n8n-to-supabase.html_51509", "event": "resource.created", "created_at": 1789764056, "data": {"resource_id": "res_324", "status": "active"}}'

HTTP Response Rules

Status Code	Status Meaning	Integration Action
`200 OK`	Success	Event payload validated and queued.
`400 Bad Request`	Malformed Payload	Check payload structure and JSON formatting.
`401 Unauthorized`	Signature Mismatch	Verify secret key and digest computation.
`500 Error`	Server Error	Triggers provider automated retry backoff.

Security Best Practices for n8n ➔ Supabase Webhook Pipeline Specification

Always process incoming events asynchronously using a message queue. Never perform long-running DB queries or external API calls synchronously within the HTTP response handler.

Frequently Asked Questions

Why does signature validation fail on Express/Flask?

Your framework might be auto-parsing JSON. HMAC generation requires the exact raw byte buffer of the request body before JSON middleware alters keys or spacing.

What to do when receiving HTTP 429 status from n8n ➔ Supabase Webhook Pipeline Specification?

A 429 status indicates your endpoint is being rate limited. Implement dynamic throttling or increase consumer worker threads in your queue worker.

How does n8n ➔ Supabase Webhook Pipeline Specification handle automatic delivery retries?

Failed deliveries (non-2xx responses) trigger an exponential backoff retry schedule over a period ranging from 24 to 72 hours.