Build HTTP requests and get cURL, the HTTP action for Power Automate and an OpenAPI definition.

Method, URL, headers (as a JSON object) and body in one place. The snippets are generated as you type, without sending. That matters, because Dataverse, SharePoint and many other APIs block browser calls via CORS. The body can be JSON or text. In the OpenAPI an Authorization header becomes securityDefinitions instead of a value, and query parameters are included.

Open HTTP Request Builder

Free. You enter your email address once, then all tools are unlocked. The snippets are built locally in your browser, only Send Request sends the request to the target API.

How it works

1. Enter method, URL, headers and body.
2. Copy the snippets for cURL, Power Automate and OpenAPI.
3. Optionally send the request live, without real tokens.

Example: PATCH to the Dataverse Web API

curl -X PATCH "https://org.crm.dynamics.com/api/data/v9.2/accounts(00000000-0000-0000-0000-000000000001)" \
 -H "Accept: application/json" \
 -H "Content-Type: application/json" \
 -d '{"name": "Contoso Ltd"}'

Frequently asked questions

Is the request builder free?

Yes.

Is my input sent anywhere?

Only when you click Send Request. The request then goes straight from your browser to the target API, including all headers. Do not enter real tokens or passwords for that. The snippets are generated without sending.

Why does the live test fail?

Usually CORS: many APIs do not allow calls from the browser. The snippets are still correct.

Which methods are supported?

GET, POST, PUT, PATCH, DELETE and HEAD.

How do I enter headers?

As a JSON object, for example {"Accept": "application/json"}. The tool adds Content-Type for a JSON body.

Which action is this for?

For the premium HTTP action in Power Automate. For Microsoft Graph the HTTP with Microsoft Entra ID connector is often simpler (tip 138).

Related tips

• #PowerPlatformTip 58: 'HTTP Actions'
• #PowerPlatformTip 138: 'Graph API via HTTP with Microsoft Entra ID'
• #PowerPlatformTip 162: 'Create a Private Teams Channel from a Flow'
• #PowerPlatformTip 164: 'Invite External Users (Guests) to Microsoft Entra ID with Power Automate'
• #PowerPlatformTip 18: 'Download & Save Files'
• #PowerPlatformTip 142: Automate Outlook Categories
• #PowerPlatformTip 153: 'Rename a SharePoint File with Power Automate'

All tips in the archive

More Power Platform Tools

• JSON Validator
• OData Filter Builder (SharePoint and Dataverse)
• ParseJSON in Power Apps (JSON to Power Fx)
• Flow Transformer (Rename Actions and Variables)
• Base64 to Text Converter

All 27 tools