Some things to check:
- Authorization is set to "No auth"
- Body is sent as raw JSON
- Cookie values are not being sent (this is important for requests after the first successful one)
You can also try importing the following:
Central.postman_collection.json (1.3 KB)
In case this is of interest to you or someone else -- I was looking for a quick way to get the full Central API specification into Postman. The best I found was:
- go from APIB to Swagger using https://github.com/kminami/apib2swagger
- go from Swagger to OpenAPI using https://editor.swagger.io/
- drag the resulting yaml into Postman
The OpenAPI results I got: odk-central.yaml.zip (63.6 KB)