Webhook integration code

Schedule webhook integrations from code.

Most webhook integrations start simple: send an HTTP request when something happens. Production workflows often need one extra step: send that webhook later, retry it safely, and keep a delivery log that support can inspect.

Create a free API key Open API docs

API request

HTTPS only

curl https://webhookscheduler.com/api/v1/schedule \
  -H "Content-Type: application/json" \
  -H "x-api-key: wh_live_xxx" \
  -d '{
    "url": "https://example.com/webhooks/billing-follow-up",
    "method": "POST",
    "body": { "event": "invoice.payment_failed" },
    "runAt": "{{ tomorrow_at_09_utc }}",
    "idempotencyKey": "invoice_123:follow_up_1"
  }'

One API call

Create a delayed webhook delivery from any backend using curl, Node, Python, Ruby, PHP, Go, or a no-code HTTP action.

Retry-aware delivery

Failed endpoints can be retried with plan-based recovery attempts, backoff, status codes, latency and response bodies.

Inspectable integrations

Each scheduled webhook has a dashboard record, delivery state, attempt timeline and payload/headers context.

The basic integration pattern

Your app keeps the business event. Webhook Scheduler handles the delayed HTTP delivery. Instead of running a cron loop, creating a queue consumer, or writing a retry worker, your backend sends one scheduling request.

The target URL must be a public HTTPS endpoint. The request can include a method, body, headers, run time and idempotency key. When the time arrives, the worker dispatches the webhook and stores the result.

Node.js example

Server-side code should keep the API key private. Put it in an environment variable and call the scheduling endpoint from your backend, not from the browser.

Node.js

await fetch('https://webhookscheduler.com/api/v1/schedule', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'x-api-key': process.env.WEBHOOK_SCHEDULER_API_KEY
  },
  body: JSON.stringify({
    url: 'https://example.com/webhooks/user-onboarding',
    method: 'POST',
    body: { event: 'user.onboarding_day_3', userId: 'user_123' },
    runAt: '{{ tomorrow_at_09_utc }}',
    idempotencyKey: 'user_123:onboarding_day_3'
  })
});

Python example

Python services can schedule the same delayed webhook with a normal HTTPS request. Keep the API key in the backend environment and use an idempotency key tied to the business object you are following up on.

Python

import os
import requests

response = requests.post(
    "https://webhookscheduler.com/api/v1/schedule",
    headers={
        "Content-Type": "application/json",
        "x-api-key": os.environ["WEBHOOK_SCHEDULER_API_KEY"],
    },
    json={
        "url": "https://example.com/webhooks/billing-follow-up",
        "method": "POST",
        "body": {"event": "invoice.payment_failed", "invoiceId": "in_123"},
        "runAt": "2026-07-15T09:00:00Z",
        "idempotencyKey": "in_123:billing_follow_up_1",
    },
    timeout=10,
)

response.raise_for_status()
print(response.json())

Good use cases

Scheduled webhook integrations work well for billing follow-ups, delayed onboarding, CRM syncs, retrying failed external callbacks, renewal reminders, no-code workflows and background API jobs.

If the workflow is tied to a customer, invoice, account, trial, subscription or external integration, a scheduled webhook gives you clearer support visibility than a generic cron script.

What to log

A production integration should not only know that a webhook was scheduled. It should know whether the delivery is pending, processing, delivered, failed, canceled or waiting for a retry.

Webhook Scheduler records status code, latency, error message, response body when available, attempt count, scheduled time and retry state. That makes debugging an integration much easier than searching server logs after the fact.

Next steps

For endpoint details, read the API reference. For reliability behavior, read the webhook retry logic guide.

FAQ

How do I schedule a webhook from code?

Call POST /api/v1/schedule from your backend with a target HTTPS URL, payload, runAt timestamp and API key. The webhook is stored and delivered later.

Can I use Webhook Scheduler with any programming language?

Yes. The API is HTTP-based, so any backend that can make an HTTPS request can schedule a webhook integration.

Should I call the scheduling API from the browser?

No. Keep API keys server-side. Your frontend should call your backend, and your backend should call Webhook Scheduler.

Ship delayed webhooks without maintaining scheduling infrastructure.

Start with the free plan, test a real delivery, then upgrade when the workflow becomes production critical.

Create a free API key