diff --git a/docsrc/sources/controller.rst b/docsrc/sources/controller.rst
index 1dc825fe..ffe3fd2b 100644
--- a/docsrc/sources/controller.rst
+++ b/docsrc/sources/controller.rst
@@ -20,5 +20,63 @@ Download and install debian package: https://github.com/rtbrick/bngblaster-contr
 API
 ---
 
-https://rtbrick.github.io/bngblaster-controller/
+OpenAPI: https://rtbrick.github.io/bngblaster-controller/
 
+Create Test Instance
+~~~~~~~~~~~~~~~~~~~~
+
+`PUT /api/v1/bngblasters/<instance-name>` 
+
+This API endpoint creates a test instance if not already created. The body of this request 
+is stored as bngblaster configuration (`config.json`).
+
+Each test instance creates a directory in `/var/bngblaster/<instance-name>`. 
+This directory contains the following files:
+
+* `config.json`: bngblaster configuration
+* `run.pid`: bngblaster process ID (if running)
+* `run.json`: bngblaster arguments
+* `run_report.json`: bngblaster report (if enabled)
+* `run.pcap`: bngblaster traffic capture (if enabled)
+* `run.sock`: bngblaster control socket
+* `run.stderr`: bngblaster standard error
+* `run.stdout``: bngblaster standard output 
+
+Start Test 
+~~~~~~~~~~~
+
+`POST /api/v1/bngblasters/<instance-name>/_start`
+
+The start API endpoint will start the bngblaster with the argument options
+defined in the body.
+
+Status
+~~~~~~
+
+`GET /api/v1/bngblasters/<instance-name>`
+
+The status API endpoint returns the status of the test. 
+
+Command 
+~~~~~~~
+
+`POST /api/v1/bngblasters/<instance-name>/_command`
+
+The JSON body of this API call will be passed to the bngblaster instance 
+control socket (`/var/bngbnlaster/<instance-name>/run.sock``). The result will 
+be passed back to the client.
+
+Stop Test 
+~~~~~~~~~
+
+`POST /api/v1/bngblasters/<instance-name>/_stop`
+
+The stop API endpoint will send the SIGINT signal to the corresponding BNG blaster instance (`kill -INT <pid>`).
+
+Delete Test Instance
+~~~~~~~~~~~~~~~~~~~~
+
+`DELETE /api/v1/bngblasters/<instance-name>`
+
+This API endpoint deletes the test instance directory. The corresponding
+test run is forcefully terminated (kill) if running.