Blog

• Create a WhatsApp group with an API (curl, Node, Python)

  Create a WhatsApp group, add people and get the invite link with three REST calls. Working curl, Node.js and Python examples.

• Verify a WhatsApp webhook signature (HMAC-SHA256) in Node and Python

  Verify the HMAC-SHA256 signature on every WhatsApp webhook delivery. Working Node.js and Python code, plus how to ignore retried duplicates.

• Send a WhatsApp message from Python

  Send a text message from Python with a channel token, read the server acknowledgment, and handle errors without blindly resending.

• Send a WhatsApp message from Node.js

  Send a text message from Node.js with a channel token, read the server acknowledgment, and handle errors without blindly resending.

• Send a WhatsApp message from curl

  Send a text message from curl with a channel token, read the server acknowledgment, and handle errors without blindly resending.

• How WhatsApp linked devices work for APIs

  Understand pairing, linked sessions, connection state, logout and the post-pair 515 reconnect in a linked-number WhatsApp API.

• WhatsApp webhook retries and outcome unknown: never auto-resend

  Deduplicate verified webhook events, accept durably before 2xx, and keep webhook retries separate from possibly delivered message sends.

• Create a WhatsApp community with an API (curl, Node, Python)

  Create a community, add a subgroup, list subgroups and fetch an invite link with curl, Node.js or Python. Learn how to link an existing group.

• WhatsApp number bans: how to avoid them when using an API

  Reduce WhatsApp restriction risk with expected conversations, customer-controlled pacing and warm-up, and honest use of number health readings.