parameter value missing

[MDC]

Hi,

i created a swagger json file. see below for the swagger yaml file.

i then went to the powerapps online interface & created a custom API. Then a connection using the custom api that i just created. 

everything goes fine. but after a min, my connection shows "parameter value missing".

any ideas?

# as a demonstration of an API spec in YAML
swagger: '2.0'
info:
title: CheckPA
description: Checking some API
version: "1.0.0"
# the domain of the service
host: xyz.abc.org
# array of all schemes that your API supports
schemes:
- https
# will be prefixed to all paths
basePath: /External/service/v1
produces:
- application/json
paths:
/List/der/yub?listFields=email:
get:
summary: some reg list
description: some desc
operationId: getList

responses:
200:
description: OK. A list
400:
description: weird
parameters: []

securityDefinitions:
usersecurity:
type: basic

[Meneghino]

Hi @MDC

Please see below for a working JSON file (fetches ECB currency exchange rates).

Indeed I have defined the parameters in the middle of the definition, and the query is not included in the path definition.

Hope this helps.

{
  "swagger": "2.0",
  "info": {
    "version": "1.0.0",
    "title": "Fixer"
  },
  "host": "api.fixer.io",
  "paths": {
    "/{FXdate}": {
      "get": {
        "description": "Fetches historical FX rates from fixer.io",
        "operationId": "Run",
        "parameters": [
          {
            "name": "FXdate",
            "in": "path",
            "required": true,
            "description": "FX date in yyyy-mm-dd format",
            "type": "string"
          },
          {
            "name": "base",
            "in": "query",
            "required": true,
            "description": "ISO symbol of base currency",
            "type": "string"
          }
        ],
        "responses": {
          "200": {
            "description": "Successful response",
            "schema": {
              "title": "The response of the api.",
              "type": "object",
              "properties":{
                "base":{
                  "type": "string"
                },
                "date":{
                  "type": "string"
                },
                "rates":{
                  "type": "object",
                  "properties":{
                    "USD":{
                      "type": "number",
                      "format": "double"
                    },
                    "EUR":{
                      "type": "number",
                      "format": "double"
                    },
                    "GBP":{
                      "type": "number",
                      "format": "double"
                    },
                    "RUB":{
                      "type": "number",
                      "format": "double"
                    },
                    "CHF":{
                      "type": "number",
                      "format": "double"
                    },
                    "BRL":{
                      "type": "number",
                      "format": "double"
                    },
                    "CZK":{
                      "type": "number",
                      "format": "double"
                    },
                    "HKD":{
                      "type": "number",
                      "format": "double"
                    },
                    "SGD":{
                      "type": "number",
                      "format": "double"
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}

[MDC]

Hi Meneghino,

Thanks for the reply. 

i have tried to define the swagger file like you have i.e. in the parameters section i defined the path & query parameters but i still have the same issue.

[Meneghino]

OK, sorry I couldn't help.

[v-micsh-msft]

Hi @MDC,

How you created this swagger file?

Please take a look at the get help with swagger file in the article below:

https://powerapps.microsoft.com/en-us/tutorials/register-custom-api/

For Swagger specification for the parameter object, see:

https://github.com/OAI/OpenAPI-Specification/blob/master/versions/2.0.md#parameter-object

Further, for web API, take a try to generate the swagger under Visual Studio.

See if the blog would help:

Guest Blog:Build Custom API on Microsoft Flow and PowerApps with Authentication

Regards