Hey Alex,
Gotta love ChatGPT and hallucinations 
There is no “dedicated” domain for API calls.
Using REST
You can create a REST client in any of the 11 supported languages and run as an agent. But if you don’t want to run NodeRed, I’m assuming you don’t want to run an agent either. So, that leaves:
Using Client Library
Hopefully, you are working within one of these programming languages: OpenIAP SDK Documentation. Depending on the language, install the client library for your code base. Make sure you are at least using version 0.0.33. Then, you can trigger a robot using something like:
C/C++
struct InvokeOpenRPARequestWrapper req;
req.robotid = "5ce94386320b9ce0bc2c3d07";
req.workflowid = "5e0b52194f910e30ce9e3e49";
req.payload = "{\"test\":\"test\"}";
req.rpc = true;
struct InvokeOpenRPAResponseWrapper *resp = invoke_openrpa(client, &req, 10);
if (resp == NULL) {
printf("Error: invoke_openrpa returned NULL.\n");
} else {
if (!resp->success) {
printf("Invoke OpenRPA failed: %s\n", resp->error);
} else {
printf("Invoke OpenRPA result: %s\n", resp->result);
}
free_invoke_openrpa_response(resp);
}
Or if you are more into Python:
try:
result = client.invoke_openrpa(
"5ce94386320b9ce0bc2c3d07",
"5e0b52194f910e30ce9e3e49",
{"test": "test"},
timeout=10
)
print("Invoke OpenRPA result:", result)
except Exception as e:
print(f"Invoke OpenRPA failed: {e}")
Or .NET:
try {
var rparesult = client.InvokeOpenRPA("5ce94386320b9ce0bc2c3d07",
"5e0b52194f910e30ce9e3e49", "{\"test\":\"test\"}", true, 10);
client.info("rpa result " + rparesult);
} catch (System.Exception ex) {
client.error("Client connection error: " + ex.Message);
}
I think you get the idea …
This May Break in the Future, So Not Recommended
I think what ChatGPT was referring to is the OpenAPI endpoint in OpenCore. There is an /api/v1/runopenrpaworkflow/{robotname}, but this is not really “officially” supported. It was used as part of adding functions to ChatGPT GPT’s using OpenIAP OpenAPI Documentation (OpenIAP OpenAPI Documentation).
See my post here Using OpenAI GPTs with OpenFlow for my “call out” to the community to see if that is something people want.