---
title: "Connect Sendcloud webhooks to Shopify Flow - Workflow Webhooks"
description: "Send Sendcloud webhooks into Shopify Flow. Step-by-step setup with Sendcloud's HMAC signature verified on every request, plus what the app checks and how to troubleshoot."
canonical: "https://docs.workflow-webhooks.app/how-to-connect-sendcloud"
---

# How to connect Sendcloud to Shopify Flow

Sendcloud handles shipping and parcel tracking. It sends a webhook every time a parcel changes status. **Workflow Webhooks** turns that call into a **Shopify Flow trigger**, so your store can react to it: tag a customer, add an order note, send an internal email, update a metafield - anything Shopify Flow can do.

This guide sets up the whole path - Sendcloud sends, Workflow Webhooks receives and verifies, Shopify Flow acts - with Sendcloud's HMAC signature checked on every request, so nothing but Sendcloud can start your workflow.

## What you can build

- Add an order note the moment a parcel is delivered, without polling a carrier API.
- Email the customer's assigned rep when a delivery fails.
- Tag orders that are stuck in transit longer than expected, so support can act.

Typical events to send: a parcel is announced, a parcel is in transit, a parcel is delivered, a delivery fails.

## Before you begin

- **Workflow Webhooks** installed on your Shopify store.
- **Shopify Flow** installed, which is free from the Shopify App Store.
- An account on Sendcloud with permission to create webhooks.

## Step 1 - Create the webhook in Workflow Webhooks

1. Open **Workflow Webhooks -> Webhooks -> Create webhook** and give it a name you will recognise in Flow, such as `Sendcloud events`.
2. Under **Authentication**, choose **HMAC**.
3. Under **Signature provider**, pick **Sendcloud**. The app fills in the header, algorithm, signed payload and replay window for you - there is nothing else to configure.
4. Leave the secret empty for now and **Save**. Copy the webhook URL shown on the page.

See [Authentication](https://docs.workflow-webhooks.app/authentication.md) for the other authentication modes, and [Payload mapping and Flow variables](https://docs.workflow-webhooks.app/payload-mapping.md) for choosing which fields reach Flow.

## Step 2 - Add the endpoint in Sendcloud

In Sendcloud, open the integration's settings and set the webhook URL to the URL you copied. The Secret Key of the integration is what signs the request.

### How to find your Sendcloud signing secret

The integration's Secret Key (or the Webhook Signature Key).

[Sendcloud's own documentation on webhook signatures](https://sendcloud.dev/api/v2/webhooks) has the exact wording and screenshots for your account.

Paste that secret into the webhook's **Secret** field in Workflow Webhooks and save. From that moment every Sendcloud delivery is verified before it reaches Flow.

## What this checks

| What | Value |
| --- | --- |
| **Signature header** | `Sendcloud-Signature` |
| **Where the signature sits** | The whole header value |
| **What is signed** | `{body}` |
| **Signature** | HMAC-SHA256, hex encoded |
| **Timestamp** | Not used by this sender |
| **Replay protection** | None - this sender does not sign a timestamp, so every valid signature stays valid |
| **The secret** | Used as plain text. Paste it exactly as the sender shows it |

In the signed payload, `{body}` is the raw request body, byte for byte.

A request that fails any of these is rejected with `401`, is recorded in [History and troubleshooting](https://docs.workflow-webhooks.app/history-and-troubleshooting.md), and never starts a workflow.

## Step 3 - Build the Shopify Flow workflow

1. In **Shopify Flow**, create a workflow and choose the **Workflow Webhooks** trigger.
2. Press **Record events**, then send a test event from Sendcloud (or use **Send test** in Workflow Webhooks) so Flow learns the shape of your data.
3. Every webhook you own fires the same Flow trigger, so add a first condition on the **webhook id** to keep this workflow to Sendcloud only. The id is shown on the webhook page.
4. Add your actions - tag a customer, add a note, send an internal email, update a metafield.

## Step 4 - Test it end to end

Trigger a real event in Sendcloud. In **Workflow Webhooks -> History** you should see the invocation with status **Success**. If the signature was wrong you get a failed entry with the reason instead, and [Verifying signed webhooks](https://docs.workflow-webhooks.app/signature-verification.md) explains the signature tester that shows you exactly which step failed.

### The signature does not match

In this order: the **secret** (the most common cause - an extra space, or a key from the wrong environment), whether the sender is using a **different endpoint's** secret, and whether anything between Sendcloud and the app **rewrites the body**. Signatures cover the raw bytes, so a proxy that re-formats JSON breaks them. The signature tester on the webhook page shows the exact text that was signed.

### I get 401 on every request

Check that the webhook's authentication is set to **HMAC** with the **Sendcloud** provider selected, that the secret is filled in, and that Sendcloud is posting to the URL exactly as the app shows it, including the code at the end.

### Nothing appears in History

The request never arrived. Re-check the URL in Sendcloud, and look at Sendcloud's own delivery log for the response it got. A `404` means a wrong or deleted webhook, a `429` means you are over your plan's invocation limit - see [Plans and usage](https://docs.workflow-webhooks.app/plans-and-usage.md).

### The workflow runs for the wrong events

Every webhook in your store fires the same Flow trigger. Add a condition on the **webhook id** as the first step of the workflow, or narrow the events you send from Sendcloud.

## Related

- [Verifying signed webhooks](https://docs.workflow-webhooks.app/signature-verification.md) - every provider we verify, and how to describe one we do not.
- [Payload mapping and Flow variables](https://docs.workflow-webhooks.app/payload-mapping.md) - getting the right fields out of the payload and into Flow.
- [Duplicate delivery protection](https://docs.workflow-webhooks.app/duplicate-delivery.md) - what happens when Sendcloud retries a delivery.
- [History and troubleshooting](https://docs.workflow-webhooks.app/history-and-troubleshooting.md) - the log of every request, with replay.