# Signed API Request

Send an HTTP request with an HMAC signature.

## Plan availability

| Feature | Free | Starter | Pro | Enterprise |
| --- | --- | --- | --- | --- |
| Active workflows | 3 | 10 | 45 | Unlimited |

Allowances follow the [published Chatigram pricing page](https://chatigram.com/pricing/). Your organization’s Billing & Plans screen confirms its subscription and current usage. Plans can change. Plan information reviewed 2026-11-10.


## When to use this node

Send an HTTP request with an HMAC signature.

Add **Signed API Request** to a workflow branch using the node picker. Configure its fields in the inspector, then connect the next step.

## Configure the fields

| Field | What to enter |
| --- | --- |
| **Secret source** | Set this value in the inspector. Use the variable picker where the field supports expressions. |
| **Secret** | Set this value in the inspector. Use the variable picker where the field supports expressions. |
| **Signature encoding** | Set this value in the inspector. Use the variable picker where the field supports expressions. |
| **Signature Header name** | Set this value in the inspector. Use the variable picker where the field supports expressions. |
| **Timestamp Header name** | Set this value in the inspector. Use the variable picker where the field supports expressions. |
| **Request ID Header name** | Set this value in the inspector. Use the variable picker where the field supports expressions. |
| **Key ID Header name (optional)** | Set this value in the inspector. Use the variable picker where the field supports expressions. |
| **Key ID value (optional)** | Set this value in the inspector. Use the variable picker where the field supports expressions. |
| **Canonical signing template** | Set this value in the inspector. Use the variable picker where the field supports expressions. |

## Use the result

This definition has no fixed public output variables. It may perform an action, or expose dynamic outputs after you configure response extraction, a table, or another resource. Check the variable picker after configuring the node.

## Connect the next step

Connect the continuation shown on the canvas. Some nodes calculate their branches from the configured options. Read each branch label in the editor and connect the paths your workflow needs.

## Test it in a workflow

1. Configure this node with a small, recognizable test input or a test resource.
2. Check the variables from preceding steps and the connection selected in the inspector.
3. Save the workflow. For event-driven flows, generate the actual event; use **Run** only for a Manual workflow.
4. Open **Workflow Activity** and check the outcome before enabling wider use.

## If something goes wrong

- Check empty variables, selected resource IDs, and any fields that appeared after resource selection.
- Check the failed step in Workflow Activity before retrying. If the action may already have completed, inspect the destination first to avoid duplicates.
- Follow the [troubleshooting guide](/help/troubleshooting/) for a symptom-by-symptom checklist.

## Related guides

- [Work with variables](/workflows/variables/)
- [Understand branches and error handling](/workflows/branches/)
- [Browse all nodes](/reference/nodes/)
- [A/B Testing](/nodes/ab-testing/)
- [Analyze Image](/nodes/attachment-analyze-image/)
- [Ask Multiple Choice Question](/nodes/ask-multiple-choice-question/)
- [ChatGPT Task](/nodes/chatgpt-task/)
- [Check condition](/nodes/if-statement/)


## Catalog coverage

This is the currently documented selection. Chatigram continues to add nodes, triggers, App Connections, and integrations. Use each page’s review date and the current application selectors to check what is available now; this catalog is not a fixed limit on future features.