Which headers for an API request are implicitly filled by the SF?
I want to call an API and the error message is -4 - Unsuccessful (invalid headers).
I also use a header [{ "Key": "x-api-key", "Value": "123"}].
![](https://uploads-eu-west-1.insided.com/thinkwise-en/attachment/2aa591b0-2c8e-4dc9-a496-fc53003fbda5.png)
I have successfully called the API with the following headers in Postman.
![](https://uploads-eu-west-1.insided.com/thinkwise-en/attachment/0b2de526-b930-44f0-8428-1d655d4143b2.png)
Again there is too little information in the documentation and this costs me a lot of time to figure out by trial-and-error.