Web API with POST Method

Here are the options:
1. Test it from within Appian - create a test process model and use the HTTP Query Smart service - it supports POST
2. Use a Chrome plugin like Postman - this is for testing from outside Appian.
In both cases, you need to use HTTP Basic Authentication, and you can send the data in the request body

SoapUI also supports calling Appian Web API. Create a REST project providing the Appian URL. Then you can setup your test cases.

@erick258 you can go for the Options suggested by @stefanh791 and @chetany, but don't you feel that for querying the Database, POST is not required, we can do it using GET also

Yes, if you are just reading from DB and returning the response in Web API - POST method is not needed. But, if you are getting the data from request body and writing to DB using a!writeToDataStoreEntity() in Web API, then POST is the correct method.

@chetany that's true, I agree

@chetany I'm using post method for the purpose of passing filter parameter e.g passing a login username and password. And when I'm using Postman it's give me an HTTP 401 Error which is a "JBWEB000121: This request requires HTTP authentication."
@stefanh791 In case of SoapUI it returns a HTTP 404 not found.

You don't need POST method for passing username and password. username and password are sent in header and they are base 64 encoded. The name of the header should be "Authorization" and its value should be "Basic BASE64ENCODE(CONCATENTAION_OF_USERNAME_AND_PASSWORD) " You can do it with GET method too.

In Postman, specify it as "Basic Authorization " under "Authorization" tab, and enter the username and password - it will automatically encode it for you to base64

401 is for incorrect auth. 404 is for incorrect resource.

@chetany The username and password passed here is not for the API Authorization, they are the parameter for the API itself, say they're the parameter needed for some Login Verification API which returns specific value if login is verified.
I have check and recheck the Authorization for Postman, it always return 401 when I'm trying to try out the API using POST method. While for GET method API, it worked out just fine. Is this because all API created by Appian is a GET method API?

edit * all Query database API is a GET method API