Operation Output Parameters

Learn about how External Services interprets an operation's output parameters.

Available in: Lightning Experience

Available in: Enterprise, Performance, Unlimited, and Developer Editions

Every operation captures the HTTP response code with an output parameter responseCode. The value of responseCode reflects the HTTP response code after the external call completes.
If the operation’s response parameter (OpenAPI) is defined under an HTTP response code value or is defined as default, then the operation output parameter name is the HTTP response code value or default. For an output parameter object type, its name contains the HTTP response code value.
For all operations where the HTTP response codes aren't defined in the OpenAPI specification, the default output parameter with name default and of type String returns the external call's response as a string.
These response content types are supported:
- application/json
- application/octet-stream
- application/x-www-form-urlencoded
- text/plain
The response content type is specified in the responses section of the spec. For example:
```
  responses:
    '200':
      description: Successful response
      content:
        application/json:
          schema:
            type: object
```

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