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diff --git a/doc/ci/api/runners.md b/doc/ci/api/runners.md
index b14ea99db76..2f01da4bd76 100644
--- a/doc/ci/api/runners.md
+++ b/doc/ci/api/runners.md
@@ -1,3 +1,46 @@
 # Runners API
 
-This document was moved to a [new location](../../api/ci/runners.md).
+API used by runners to register and delete themselves.
+
+_**Note:** This API is intended to be used only by Runners as their own
+communication channel. For the consumer API see the
+[new Runners API](../../api/runners.md)._
+
+## Authentication
+
+This API uses two types of authentication:
+
+1.   Unique runner's token
+
+     Token assigned to runner after it has been registered.
+
+2.   Using runners' registration token
+
+     This is a token that can be found in project's settings.
+     It can be also found in Admin area » Runners settings.
+
+     There are two types of tokens you can pass - shared runner registration
+     token or project specific registration token.
+
+## Runners
+
+### Register a new runner
+
+Used to make GitLab CI aware of available runners.
+
+    POST /ci/api/v1/runners/register
+
+Parameters:
+
+  * `token` (required) - Registration token
+
+
+### Delete a runner
+
+Used to remove runner.
+
+    DELETE /ci/api/v1/runners/delete
+
+Parameters:
+
+  * `token` (required) - Unique runner token