GoCD POST requests return "The resource you requested was not found!" - api

Question

I have GoCD instance and want to automate regular actions like scheduling pipelines and checking pipelines statuses using GoCD API.
When I do GET request it works:
curl 'https://gocd.demo.kagarlickij.com/go/api/pipelines/frankenstein/status' \
-u 'kagarlickij:Pa$$w0rd' | jq
..but when I do POST request it returns "The resource you requested was not found!":
curl 'https://gocd.demo.kagarlickij.com/go/api/pipelines/frankenstein/pause' \
-u 'kagarlickij:Pa$$w0rd' \
-H 'Accept: application/vnd.go.cd.v1+json' -H 'Content-Type: application/json' \
-X POST -d '{"pause_cause": "Investigating build failures"}' | jq
..another POST example:
curl 'https://gocd.demo.kagarlickij.com/go/api/pipelines/frankenstein/schedule' \
-u 'kagarlickij:P#$$w0rd' \
-H 'Accept: application/vnd.go.cd.v1+json' -H 'Content-Type: application/json' \
-X POST -d #gocd.json | jq
json content:
{
"environment_variables": {},
"materials": {},
"update_materials_before_scheduling": false
}
Any ideas how pipelines could be started using API?

Answer 1

Some GoCD API calls require 'Confirm': 'true' header.
In you case, you can try running curl like this:
curl 'https://gocd.demo.kagarlickij.com/go/api/pipelines/frankenstein/pause' \
-u 'kagarlickij:Pa$$w0rd' \
-H 'Accept: application/vnd.go.cd.v1+json' \
-H 'Content-Type: application/json' \
-H 'Confirm: true' \
-X POST -d '{"pause_cause": "Investigating build failures"}' | jq
I can recommend my lib yagocd for GoCD, which takes cares about version incompatibilities and makes working with GoCD API much easier.

Answer 2

The answer turned out to be very simple - that API actions require GoCD v18.2.0 but I had v18.0.0
After upgrade API calls work as expected