# Rasa SDK - Action Server Endpoint (0.0.0)

Download OpenAPI specification: [Download](https://legacy-docs-oss.rasa.com/docs/rasa/spec/action-server.yml)

API of the action server which is used by Rasa to execute custom actions.

## Core request to execute a custom action

Rasa Core sends a request to the action server to execute a certain custom action. As a response to the action call from Core, you can modify the tracker, e.g. by setting slots and send responses back to the user.

##### Request Body schema: application/json

Describes the action to be called and provides information on the current state of the conversation.

|     |     |
| --- | --- |
| next_action | string<br>The name of the action which should be executed. |
| sender_id | string<br>Unique id of the user who is having the current conversation. |
| tracker | object<br>Conversation tracker which stores the conversation state. |
| domain | object<br>The bot's domain. |

### Responses

**200**  
Action was executed successfully.

**400**  
Action execution was rejected. This is the same as returning an `ActionExecutionRejected` event.

**500**  
The action server encountered an exception while running the action.

post/

Local development action server

http://localhost:5055/webhook/

### Request samples

- Payload

Content type

application/json

```
{"next_action": "string",

"sender_id": "string",

"tracker":
{"conversation_id": "default",

"slots":
[\
{"slot_name": "slot_value"\
\
}\
\
],

"latest_message":
{"entities":
[\
{"start": 0,

"end": 0,

"value": "string",

"entity": "string",

"confidence": 0\
\
}\
\
],

"intent":
{"confidence": 0.6323,

"name": "greet"

},

"intent_ranking":
[\
{"confidence": 0.6323,

"name": "greet"\
\
}\
\
],

"text": "Hello!"

},

"latest_event_time": 1537645578.314389,

"followup_action": "string",

"paused": false,

"events":
[\
{"event": "user",

"timestamp": null,

"metadata":
{"arbitrary_metadata_key": "some string",

"more_metadata": 1\
\
},

"text": "string",

"input_channel": "string",

"message_id": "string",

"parse_data":
{"entities":
[\
{"start": 0,

"end": 0,

"value": "string",

"entity": "string",

"confidence": 0\
\
}\
\
],

"intent":
{"confidence": 0.6323,

"name": "greet"\
\
},

"intent_ranking":
[\
{"confidence": 0.6323,

"name": "greet"\
\
}\
\
],

"text": "Hello!"\
\
}\
\
},

"latest_input_channel": "rest",

"latest_action_name": "action_listen",

"latest_action":
{"action_name": "string",

"action_text": "string"

},

"active_loop":
{"name": "restaurant_form"

}

},

"domain":
{"config":
{"store_entities_as_slots": false

},

"intents":
[\
{"property1":
{"use_entities": true\
\
},

"property2":
{"use_entities": true\
\
}\
\
}\
\
],

"entities":
["person",

"location"\
\
],

"slots":
{"property1":
{"auto_fill": true,

"initial_value": "string",

"type": "string",

"values":
["string"\
\
]

},

"property2":
{"auto_fill": true,

"initial_value": "string",

"type": "string",

"values":
["string"\
\
]

}

},

"responses":
{"property1":
{"text": "string"

},

"property2":
{"text": "string"

}

},

"actions":
["action_greet",

"action_goodbye",

"action_listen"\
\
]

}

```

### Response samples

- 200
- 400

Content type

application/json

```
{"events":
[\
{"event": "user",

"timestamp": null,

"metadata":
{"arbitrary_metadata_key": "some string",

"more_metadata": 1\
\
},

"text": "string",

"input_channel": "string",

"message_id": "string",

"parse_data":
{"entities":
[\
{"start": 0,

"end": 0,

"value": "string",

"entity": "string",

"confidence": 0\
\
}\
\
],

"intent":
{"confidence": 0.6323,

"name": "greet"\
\
},

"intent_ranking":
[\
{"confidence": 0.6323,

"name": "greet"\
\
}\
\
],

"text": "Hello!"\
\
}\
\
},

"responses":
[\
{"text": "string"\
\
}\
\
]

}

```