Skip to main content

Send messages to API channel

To send messages to API channel, you need have a basic understanding of the models and nomenclature used in Chatwoot. Let us try to understand these first.

  1. Channel: Channel defines the type of the source of conversations. Eg: Facebook, Twitter, API etc.

  2. Inbox: You can create multiple sources of conversations which is of the same channel type. For eg: You can have more than one Facebook page connected to a Chatwoot account. Each page is called as the inbox in Chatwoot.

  3. Conversation: A Conversation is a collection of messages.

  4. Contact: Each conversation has a real life person associated with it, this person is called a contact.

  5. Contact Inboxes: This is the session for each contact on a inbox. A contact can have multiple sessions and multiple conversations in the same inbox.

How to send a message in an API Channel?

To send a message in an API channel, you have to create a contact, then create a conversation and then send a message.

APIs require api_access_token in the request header. You can get this token by visiting your Profile settings > Access Token

1. Create a contact

API documentation: (

Pass the inbox id of the API channel along with other params specified. This would create a session for you automatically. A sample response would look like the one below.

"email": "string",
"name": "string",
"phone_number": "string",
"thumbnail": "string",
"additional_attributes": {},
"contact_inboxes": [
"source_id": "string",
"inbox": {
"id": 0,
"name": "string",
"website_url": "string",
"channel_type": "string",
"avatar_url": "string",
"widget_color": "string",
"website_token": "string",
"enable_auto_assignment": true,
"web_widget_script": "string",
"welcome_title": "string",
"welcome_tagline": "string",
"greeting_enabled": true,
"greeting_message": "string"
"id": 0,
"availability_status": "string"

As you can see in the payload, you will be able to see the contact_inboxes and each contact_inbox will have a source_id. Source Id can be seen as the session identifier. You will use this source_id to create a new conversation as defined below.

2. Create a conversation

API documentation: (

Use the source_id received in the previous API call.

You will receive a conversation id which can be used to create a message.

"id": 0

3. Create a new message

API documentation: (

There are 2 types of messages.

  1. Incoming: Messages sent by the end user is classified as an incoming message.

  2. Outgoing: Messages sent by the agent is classified as an outgoing message.

If you call the API with the correct content, you will receive a payload similar to the one below.

"id": 0,
"content": "This is a incoming message from API Channel",
"inbox_id": 0,
"conversation_id": 0,
"message_type": 0,
"content_type": null,
"content_attributes": {},
"created_at": 0,
"private": false,
"sender": {
"id": 0,
"name": "Pranav",
"type": "contact"

If everything is sucessful you will see the conversation on the dashboard as follows.


You will be notified when a new message is created on the URL specified while creating the API channel. You can read about the message payload here.