2chat Whatsapp

2Chat — WhatsApp Messaging

Send and receive WhatsApp messages, manage connected numbers, and update your WhatsApp profile via the 2Chat API.

Authentication

All requests require the header:

X-User-API-Key: <api_key>

API keys are generated at app.2chat.io/developers. Base URL: https://api.p.2chat.io/open

Numbers

Create a WhatsApp Web channel

POST /whatsapp/channel/create

{
  "phone_number": "+14378375573",
  "friendly_name": "My Number"
}

Returns a channel object with uuid and connection_status (D=disconnected, C=connected). After creation the channel is disconnected and awaiting a QR scan.

Get QR code for a channel

GET /whatsapp/channel/{uuid}/qr-code

Returns qr_code (raw string) and qr_code_image_url (PNG URL). The QR refreshes at most every 5 seconds — don't poll faster than that. The user scans it from WhatsApp → Settings → Linked Devices → Link a device; once scanned, connection_status flips from D to C.

List connected numbers

GET /whatsapp/get-numbers

Query params: status (connected, disconnected, all), page_number, results_per_page (default 50).

Returns array of numbers with uuid, phone_number, friendly_name, platform, channel_type, connection_status (C=connected, D=disconnected, F=failure).

Get number details

GET /whatsapp/channel/{uuid}

Returns: connection status, timezone, language, business profile flag, pushname.

Execute channel command

POST /whatsapp/channel/{uuid}/{command}

Supported commands: connect (triggers QR code), disconnect (disconnects without deleting).

Delete channel

DELETE /whatsapp/channel/{uuid}

Check if a number is on WhatsApp

GET /whatsapp/check-number/{your-number}/{target-number}

Add ?extra-information=true for carrier and business profile details (costs 2 API calls instead of 1).

Returns: is_valid, on_whatsapp, number (country, region, carrier, timezone), and whatsapp_info (profile pic, business status, verified name, status text) when on WhatsApp.

Messaging

Send a message

POST /whatsapp/send-message

{
  "to_number": "+15551234567",
  "from_number": "+15557654321",
  "text": "Hello from 2Chat!"
}

Use to_group_uuid instead of to_number to send to a group. Cannot use both simultaneously.

For media (max 16 MB, must be a publicly accessible URL):

{
  "to_number": "+15551234567",
  "from_number": "+15557654321",
  "url": "https://example.com/image.jpg"
}

For a GPS pin:

{
  "to_number": "+15551234567",
  "from_number": "+15557654321",
  "pin": {
    "latitude": "-25.7752926",
    "longitude": "-56.647703",
    "name": "Somewhere",
    "address": "Some address 123",
    "url": "https://example.com"
  }
}

Returns: success, message_uuid, batched.

Get messages

GET /whatsapp/messages/{your-number}
GET /whatsapp/messages/{your-number}/{remote-number}

Query param: page_number (100 messages per page). Only messages after connection are returned.

sent_by values: api, agent, user.

Get a single message

GET /whatsapp/message/{session_key}/{message_uuid}

Returns full message details including delivery status: wa_msg_ack (0=created, 1=sent, 2=received, 3=read).

Delete a message

DELETE /whatsapp/message/{session_key}/{message_uuid}

Only possible within 60 hours of sending. Group admins can delete any message; non-admins only their own.

Get group messages

GET /whatsapp/groups/messages/{group_uuid}

Query param: page_number (50 messages per page). Each message includes participant info (phone, pushname).

Conversations

List conversations

GET /whatsapp/conversations/{channel_uuid}

Query params: page_number (10 per page), phone_number (search filter, 3-20 digits).

Returns sessions with contact info, last activity, profile picture, and group chat flag.

Profile

Set profile picture

POST /whatsapp/set-profile-picture/{number}

{ "url": "https://example.com/photo.jpg" }

Set url to null to remove. Returns: success, batched.

Set status

POST /whatsapp/set-status/{number}

{ "status": "My cool new status" }

Returns: success, batched.

Rate Limits

Tips

• Always GET /whatsapp/check-number before sending to avoid delivery failures.
• Use message_uuid from send responses to track delivery via webhooks.
• Media URLs must be publicly accessible at send time.
• For bulk messaging, respect rate limits and check the batched flag.