WhatsApp API · Team inbox · Automation

One WhatsApp connection. Everything connected.

Build WhatsApp into your product, answer customers as a team, and automate follow-up — on the same numbers, contacts and conversations.

Start free Read the quick start

Team inbox
Automation
API & webhooks
CRM

The WhatsTIG team inbox: a list of WhatsApp conversations with assignees and tags, and an open thread with replies from an agent and an internal note mentioning a teammate.

The phone is an illustration of your customer’s side. Below it, the WhatsTIG team inbox with a sample business.

REST API · OpenAPI 3.1
Signed webhooks
TypeScript & .NET SDKs
Inbox · AI · Campaigns · CRM · Follow-ups
Free: 1 number, 1,000 messages / month

01Connect

A WhatsApp channel your product can call.

Link a number once with a QR or pairing code, then send and receive over a documented REST API. Sends are idempotent, events are signed, and every status says whether it was confirmed or inferred.

Quick start API reference Messaging API & webhooks

curl -X POST https://api.whatstig.com/v1/messages \
  -H "Authorization: Bearer $WHATSTIG_API_KEY" \
  -H "Idempotency-Key: order-4512-shipped" \
  -H "Content-Type: application/json" \
  -d '{
    "instanceId": "wa_01jq8x7y2z3a4b5c6d7e8f9g0h",
    "recipient": "923001234567",
    "type": "text",
    "content": { "text": "Your order has shipped." },
    "clientReference": "order-4512"
  }'

HTTP/1.1 202 Accepted
{ "id": "msg_01jq…", "status": "QUEUED", "clientReference": "order-4512" }

From 202 to read, with no guessing.

QUEUEDStored durably; 202 returnedconfirmed
PROCESSINGA worker is sending itconfirmed
SENTTransmitted to WhatsAppinferred → confirmed
DELIVEREDOn the recipient’s deviceconfirmed
READOpened, if receipts are onconfirmed

FAILEDDefinitely not sent: invalid recipient, missing media, expired. The failure code says why.

UNKNOWNA send was attempted but not confirmed. Flagged for you, never resent automatically.

GET /v1/messages/{id}/events returns every step with its certainty.

One instance per tenant.

Serving many customers? Give each one their own number and map it to your tenant with externalReference. It comes back on every webhook, so you always know whose message it was. Projects keep products and environments apart.

curl -X POST https://api.whatstig.com/v1/instances \
  -H "Authorization: Bearer $WHATSTIG_API_KEY" \
  -H "Idempotency-Key: create-tenant-101" \
  -H "Content-Type: application/json" \
  -d '{ "name": "Green Valley School", "externalReference": "tenant-101" }'

WhatsApp instances for five tenants, each with its number, connection status and external reference. — Five tenants, five numbers, one projectDashboard screenshot · sample business

POST /whatstig/webhooks
WhatsTIG-Signature: t=1791540922,v1=5f8c…
WhatsTIG-Event-Type: message.delivered

{
  "type": "message.delivered",
  "instanceId": "wa_01jq…",
  "externalReference": "tenant-101",
  "data": { "messageId": "msg_01jq…", "status": "DELIVERED" }
}

REST API with an OpenAPI 3.1 contractPOST /v1/messages: Text, images and documents. A 202 means the message is stored durably and sent asynchronously.
Idempotent sendsIdempotency-Key: Retry any send safely: a repeated key returns the original response instead of a second message.
Signed webhooksWhatsTIG-Signature: HMAC-signed, at-least-once delivery from a transactional outbox, with retries, delivery logs and replay.
Scoped API keys: Least-privilege scopes, rotation and instant revocation. Secrets are shown once and stored only as keyed hashes.
SDKs@whatstig/sdk · WhatsTig.Client: TypeScript and .NET clients generated from the contract, plus a Postman collection.
Hosted connect links: Send your customer a short-lived link to a page that shows only their instance’s QR code and status.

02Converse

Every number, one inbox, the whole team.

Everyone who writes to one of your numbers gets a conversation. Assign it, reply, leave a note your customer never sees, and resolve it — while everyone sees changes live.

A WhatsApp conversation in the team inbox: customer messages, agent replies with read receipts, an internal note and the reply composer. — An assigned conversation with an internal noteDashboard screenshot · sample business

Assignment that sticks
Take a conversation, or let round robin or least-busy assignment pick an available agent, with an optional cap per agent.
Notes and @mentions
Switch the composer to an internal note and mention a teammate to bring them in. The customer never sees it.
Receipts you can read
Sent, delivered and read ticks on every reply, from the same delivery tracking the API uses.
No double replies
See who is viewing or typing. If someone answered while you wrote, the inbox asks before sending. Type / for saved replies.
Explore the team inbox

AI assistant

Answers from what you wrote, not from what it guesses.

Write your delivery times, prices and policies the way you would brief a new colleague. The assistant answers only from that knowledge and the conversation, in your customer’s language, and steps back when it is unsure or someone asks for a person.

Knowledge · Custom sofas

Custom sofas are made to order in 3–4 weeks. Fabrics: velvet, linen blend and performance weave in 18 colours.

How long does it take to make?

Custom sofas take 3–4 weeks. Would you like the olive velvet swatches?

AI assistant · confidence above your minimum

Can you do it in 10 days?

Not in your knowledge → handed to your team

Illustration of the rules the assistant follows. Answers appear in the team inbox, where anyone can take over.

The AI assistant’s business knowledge: entries for delivery, returns, custom sofas and payment, each marked as used. — Business knowledge the assistant may useDashboard screenshot · sample business

How the AI assistant works

03Automate

From first message to won deal, without a spreadsheet of reminders.

The CRM deal pipeline with stages from New to Won and Lost, deal values and owners. — Deals move through your pipeline stagesDashboard screenshot · sample business

Follow-ups that stop when they reply.

Sequences of up to 10 steps: messages, team reminders, tags. A reply, a STOP or a won deal ends them.

A no-reply follow-up sequence: the first step waits one day after enrollment and sends a WhatsApp message, with stop conditions and delivery settings. — A no-reply sequenceDashboard screenshot · sample business

Campaigns for people who opted in.

Segments, personalization and safe pacing per number, with every recipient’s status and the reason anyone was skipped.

A completed campaign sent to opted-in contacts, with recipients, sent, delivered and read totals and a per-recipient status table. — A finished campaignDashboard screenshot · sample business

CRM Follow-ups & reminders Contacts & campaigns

Security & reliability

Built to be trusted with your customers’ messages.

Before you start

WhatsTIG uses an unofficial implementation of the WhatsApp Web protocol. It is not affiliated with, authorized, or endorsed by WhatsApp or Meta. WhatsApp may restrict accounts, the protocol may change, and delivery is never guaranteed. Only message people who expect to hear from you.

Bulk unsolicited messaging, purchased contact lists and attempts to evade WhatsApp’s limits are not allowed. See the acceptable-use policy.

Encrypted session credentials: Linked WhatsApp sessions are stored encrypted and survive restarts and deployments without a new scan.
Tenant isolation: Every query is scoped to the caller’s project. Other tenants’ resources are indistinguishable from missing ones.
Outbound protection: Webhook and media URLs are checked against private and metadata addresses on every request, after DNS resolution.
Audit log and roles: Owner, admin, developer, agent and viewer. Agents see only the inbox; key and webhook changes are recorded.
Honest delivery semantics: Every status says whether it was confirmed or inferred. Uncertain sends are flagged, never silently retried.

Start on the free plan. Upgrade when the team joins.

Compare plans

Free$0

1 WhatsApp number, 1,000 messages a month. API, webhooks and dashboard.

Starter$19 / mo

3 numbers, 20,000 messages a month, 3 inbox seats.

Business$99 / mo

25 numbers, 250,000 messages a month, 15 inbox seats.

EnterpriseCustom

Negotiated limits for large deployments.

Get started

Link a number. Send the first message. Bring your team in when you are ready.

The free plan includes the full API, webhooks and dashboard. Paid plans are activated by our team on request.

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