SOAP API Tester — XML Request Builder
Test SOAP web services directly from your browser. Select SOAP version (1.1 or 1.2), enter an endpoint URL, set the SOAPAction header, write your XML envelope, and send the request via fetch(). View the formatted XML response, detect SOAP Faults, and copy the full response. Free, browser-based, no proxy.
How to Use SOAP API Tester — XML Request Builder
How to Use the SOAP API Tester
Step 1: Select SOAP Version
Click SOAP 1.1 or SOAP 1.2 to select the version your service uses.
- SOAP 1.1 is the older, more widely supported standard. It uses Content-Type: text/xml and a required SOAPAction HTTP header.
- SOAP 1.2 is the newer W3C standard. It uses Content-Type: application/soap+xml and embeds the action in the Content-Type parameter.
If you are not sure, try 1.1 first — most legacy services use it.
Step 2: Enter the Endpoint URL
Paste the full URL of the SOAP service endpoint (e.g. https://api.example.com/service.asmx). SOAP services use a single POST endpoint for all operations.
Step 3: Set the SOAPAction
For SOAP 1.1, the SOAPAction header is required by the protocol. Its value is typically a URI like http://tempuri.org/OperationName. Check the service WSDL or documentation for the correct value. Use an empty string "" if the service does not require a specific action.
For SOAP 1.2, the action is optional and is embedded automatically in the Content-Type header when provided.
Step 4: Write Your XML Envelope
Type or paste your SOAP envelope in the editor. Use the example buttons to load pre-built envelopes for common services. The envelope must include the correct namespace for the SOAP version selected:
- SOAP 1.1: xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
- SOAP 1.2: xmlns:soap12="http://www.w3.org/2003/05/soap-envelope"
Step 5: Add HTTP Headers (optional)
Expand the Extra HTTP Headers section to add custom headers. Common use cases:
- Basic authentication: Authorization: Basic base64(user:pass)
- API key: X-API-Key: your-key
- Session tokens or cookies for legacy enterprise services
Step 6: Send the Request
Click Send or press Enter in the endpoint field. The request is sent directly from your browser using fetch(). The response panel shows the HTTP status, timing, and the formatted XML response body.
Step 7: Read the Response
A successful SOAP response wraps the result in a SOAP Envelope. If the server returns a SOAP Fault (operation error, invalid input, auth failure), the response panel shows a SOAP Fault badge. HTTP errors (4xx, 5xx) are shown with the status code.
Load Examples
Use the example buttons to load pre-built envelopes:
- Temperature C→F — W3Schools temperature converter (SOAP 1.1)
- Calculator Add — dne online calculator service, adds two integers (SOAP 1.1)
- Calculator Divide — same service, divides two integers (SOAP 1.2)
- Blank template — empty SOAP 1.1 envelope to start from scratch
Frequently Asked Questions
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