WhatsApp at developer speed. No Meta verification. Full API. Production-ready.
Build and deploy WhatsApp integrations without the five-day Meta approval dance. Free sandbox, typed SDKs, GitOps CLI, webhooks — production-ready from your first commit.
Building on WhatsApp Business API is mostly waiting.
Five-day Meta verification before you can even send a test message. Webhook signature validation that’s easy to get wrong. Template approval queues. Phone number identity management. Rate-limit telemetry. None of it is the problem you actually want to solve. We handle the boring parts so you ship the product.
The developer surface, end to end.
Free sandbox number
No Meta verification. No business address. Get a join code on signup, message it from any test phone, you're in.
REST API + OpenAPI 3.1
Every action a Bearer-token call. Interactive docs at /docs/api with try-it-out. Code samples in curl, TypeScript, Python.
Typed SDKs
npm install @flowsdesigner/sdk for TypeScript. Python and Go in private beta — open an issue to get access.
GitOps CLI
Pull flows as YAML, code-review in PRs, deploy via CI. Roll back with git revert. Your automation is finally just code.
Webhooks done right
HMAC signature validation, exactly-once delivery, retry-with-backoff, dead-letter queue. Replay any event from the dashboard.
Built for iteration
Open roadmap. Public changelog. Issues tracked in the open. Want a feature? Ping us — most ship in days, not quarters.
Ship 10× faster than the raw Cloud API.
| Task | Raw Meta Cloud API | FlowsDesigner |
|---|---|---|
| First message to a test phone | 3–5 days (verification) | 2 minutes (free sandbox) |
| Webhook signature verify | Manual HMAC, no replay | Built-in, replay from dashboard |
| Template submission | Manual via Business Manager | API + version-controlled in git |
| Local development | ngrok + manual setup | CLI with hot reload |
| Multi-tenant isolation | Roll your own | Per-workspace, scoped tokens |
| Rate-limit handling | You wrap retries | Automatic backoff + DLQ |
Three steps to your first message.
- 1Create an account
Sign up — instant access to your free sandbox number and a join code.
- 2Generate an API key
One click in Settings → API Keys. Scoped tokens, fully revocable.
- 3Send your first message
POST to /api/v1/messages. Get a webhook delivery receipt back within seconds.
curl -X POST https://flowsdesigner.com/api/v1/messages \
-H "Authorization: Bearer $FD_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"to": "+15551234567",
"type": "text",
"text": "Hello from FlowsDesigner 👋"
}'Free for development. Always.
The sandbox, the API, the SDKs, the CLI — free through May 31 and free for all development indefinitely after. Production scale pricing is announced June 1 — transparent, posted publicly, generous free tier.
We’ll never retroactively charge accounts created during beta.