Free SOAP API Testing Tool

Test SOAP API Online
Debug. Inspect. Verify Instantly.

Send real SOAP 1.1 & 1.2 requests to any endpoint. Inspect XML responses, detect SOAP Faults, view HTTP headers, and download results — completely free, no login required.

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SOAP
1.1 & 1.2 Support
Live
Real HTTP Requests
XML
Pretty-Print & Validate
Free
No Login Needed
Sending SOAP Request…

SOAP API Tester

Enter your SOAP endpoint, compose your XML envelope, and send a live request. Supports SOAP 1.1 & 1.2, custom headers, and request history.

Templates:
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Response
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HTTP Status
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Response Time
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SOAP Fault

                

                

                    

                

                

                    

                

            

        


        
        

            

                
 Request History (session only)

                
            

            
No requests yet. Send a SOAP request to start building history.

        

    







    

        

            
Why Use Our Tool

            
Advanced Features for SOAP API Testing

            
Everything a developer or QA engineer needs to inspect, debug, and validate SOAP web services — in one free browser-based tool.

        

        

            

                

                
SOAP 1.1 & 1.2 Support

                
Full support for both SOAP protocol versions. Automatically sets the correct Content-Type and handles SOAPAction headers per specification.

            

            

                

                
SOAP Fault Detection

                
Automatically parses SOAP Fault elements from the response envelope, highlighting faultcode and faultstring for instant diagnosis.

            

            

                

                
XML Pretty Printer

                
One-click XML formatting of both your request body and the raw server response. Makes even deeply nested SOAP envelopes easy to read.

            

            

                

                
Custom HTTP Headers

                
Inject any additional HTTP headers — API keys, session tokens, correlation IDs, or proprietary authentication schemes — with a simple editor.

            

            

                

                
Quick Auth Support

                
Built-in shortcut for Basic Auth, Bearer Token, and API Key headers. Automatically injects the correct Authorization header format.

            

            

                

                
Request Templates

                
Pre-built SOAP envelope templates for common public web services (country lookup, weather, calculator) to help you get started in seconds.

            

            

                

                
Session History

                
Every request is saved to session history. Replay, inspect, or load a previous request with a single click — perfect for iterative testing.

            

            

                

                
Performance Metrics

                
Measures exact response time in milliseconds and reports response size in bytes — crucial for performance benchmarking of web services.

            

            

                

                
Export & Download

                
Download the full SOAP response as a .txt file with request metadata, or copy it to clipboard with one click for use in reports or tickets.

            

        

    







    

        

            
Step by Step

            
How to Test a SOAP API Online

            
Test any SOAP web service endpoint in 4 simple steps — no software installation or account required.

        

        

            

                
1

                
Enter Endpoint URL

                
Paste the full SOAP service endpoint URL (e.g. from a WSDL file) into the endpoint field. HTTPS endpoints are fully supported.

            

            

                
2

                
Configure Request

                
Choose SOAP version (1.1 or 1.2), set the SOAPAction header, configure timeout, and add any custom authentication headers.

            

            

                
3

                
Compose XML Envelope

                
Write or paste your SOAP XML envelope in the editor. Use a template to get started fast, or format existing XML with one click.

            

            

                
4

                
Inspect the Response

                
Click Send — the tool proxies your request and returns the full XML response, HTTP status, timing, headers, and any SOAP Fault details.

            

        

    







    

        

            
Understanding SOAP API Testing: What It Is, How to Test, and Best Practices

            
SOAP (Simple Object Access Protocol) is a mature, XML-based messaging protocol widely used in enterprise web services — from banking and healthcare to government systems and legacy ERP integrations. Unlike REST, SOAP enforces a strict contract through WSDL (Web Services Description Language), uses XML envelopes for structured messaging, and supports built-in error handling via standardised SOAP Faults. Understanding how to test SOAP APIs correctly is an essential skill for backend developers, QA engineers, and integration architects.

            
Testing a SOAP API involves sending a well-formed XML envelope to a defined endpoint and verifying that the response matches the expected schema, status code, and data. Our free online SOAP API tester lets you send real HTTP requests directly from the browser — no Postman, SoapUI download, or local setup required. Simply enter the endpoint, choose your protocol version (SOAP 1.1 or SOAP 1.2), add the SOAPAction header if required, compose your XML Body, and fire the request.

            
When testing SOAP services, follow these best practices: always validate your XML envelope against the WSDL before sending; test both happy-path and fault scenarios explicitly; check the HTTP status code alongside the SOAP Body (a 200 OK can still contain a SOAP Fault); log response times to catch latency regressions; and never hard-code production credentials in test requests. For secure services, use Bearer tokens or Basic Auth headers rather than embedding credentials in the XML.

            
Common pitfalls include mismatched namespace declarations, incorrect Content-Type headers (text/xml for SOAP 1.1 vs application/soap+xml for SOAP 1.2), missing or malformed SOAPAction values, and SSL certificate issues on staging endpoints. Our SOAP tester handles all of these automatically, sending the correct Content-Type per protocol version, displaying full response headers, and surfacing SOAP Faults with their code and message in a dedicated alert panel. Use it to speed up development cycles, verify integrations before deployment, and reproduce production issues without needing local tooling.

        

    







    

        

            
Common Questions

            
Frequently Asked Questions

        

        

                        

                
                

                    SOAP (Simple Object Access Protocol) is a messaging protocol that allows programs running on different operating systems to communicate via HTTP using XML. A SOAP API exposes operations defined in a WSDL (Web Services Description Language) file. Every request is a structured XML envelope containing a Header and Body, making it highly interoperable across platforms and programming languages.
                

            

                        

                
                

                    To test a SOAP API: paste the service endpoint URL, select your SOAP version (1.1 or 1.2), enter the SOAPAction header value, compose or paste your XML request envelope in the editor, then click Send Request. The tool sends the request server-side and displays the full XML response, HTTP status code, response time, and any SOAP faults detected.
                

            

                        

                
                

                    SOAP 1.1 uses the Content-Type "text/xml" and requires the SOAPAction HTTP header. SOAP 1.2 uses "application/soap+xml" and optionally includes the action in the Content-Type parameter rather than a separate header. SOAP 1.2 also standardises fault handling with a more structured fault element, while SOAP 1.1 uses simpler faultcode and faultstring elements.
                

            

                        

                
                

                    A SOAP Fault is a standardised error response returned inside the SOAP envelope Body when processing fails. It contains a faultcode (e.g. Client, Server, VersionMismatch), a faultstring description, and optionally a detail element with additional context. Our tester automatically detects and highlights SOAP Faults in the response, showing the fault code and message prominently so you can diagnose issues quickly.
                

            

                        

                
                

                    Yes. The SOAP API tester includes a Custom Headers field where you can enter any additional HTTP headers in "Name: Value" format, one per line. This is useful for authentication headers like Authorization: Bearer token, API keys, or session tokens required by the web service.
                

            

                        

                
                

                    Currently the tool sends raw SOAP XML requests to any endpoint you specify. You can fetch and read your WSDL by entering the WSDL URL in the endpoint field to inspect the service definition, then manually compose the XML envelope based on the operation schema. Future versions will include automatic WSDL parsing and operation discovery.
                

            

                        

                
                

                    Requests are proxied through our server to bypass browser CORS restrictions, but we do not log or store the content of your SOAP XML requests or responses. For highly sensitive production credentials, we recommend running tests in a controlled environment. The tool supports HTTPS endpoints and validates SSL certificates.
                

            

                        

                
                

                    For SOAP 1.1, both successful and fault responses may return HTTP 200 OK — the fault is inside the XML body. Some servers return HTTP 500 for SOAP Faults. SOAP 1.2 more commonly returns 400 Bad Request or 500 Internal Server Error for faults. Our tester displays the HTTP code alongside any detected SOAP Fault for complete diagnostics.
                

            

                    

    







    

        

            
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