flow api

A Green API alternative with the same API. Migrate by changing one URL.

Flow API speaks the Green API request format: the same method names, request bodies and webhook notifications. Your Make scenarios, n8n workflows and code keep working after you swap the host and credentials.

Start 7-day free trialNo credit card. $10 per number per month after the trial.

The change, side by side

Before
POST https://api.green-api.com/waInstance7103…/sendMessage/f1d9…
After
POST https://flowapi.pro/waInstance1101…/sendMessage/3a4a…

Body stays the same: {"chatId":"972501234567@c.us","message":"Hello"}

What carries over unchanged

AreaMethodsCompatibility
Send text, files, location, contact, pollsendMessage, sendFileByUrl, sendFileByUpload, sendLocation, sendContact, sendPollSame body
Receive messagesWebhook URL, receiveNotification, deleteNotificationSame JSON
Instance state and QRgetStateInstance, qr, getAuthorizationCode, reboot, logoutSame response
SettingsgetSettings, setSettings (webhookUrl, incomingWebhook …)Same keys
JournalsgetChatHistory, lastIncomingMessages, lastOutgoingMessagesSame fields
GroupscreateGroup, getGroupData, addGroupParticipant, setGroupAdmin …Same body
Partner APIcreateInstance, deleteInstance, getInstancesSame calls

Full method list in the API reference and the OpenAPI spec.

Migrate in four steps

  1. Step 1
    Create a Flow API number

    Sign up, start the 7-day free trial and scan the QR code with WhatsApp.

  2. Step 2
    Change one address

    In each HTTP module or SDK, replace api.green-api.com with flowapi.pro.

  3. Step 3
    Swap the credentials

    Use your new idInstance and apiTokenInstance from the Credentials tab.

  4. Step 4
    Point your webhook

    Paste your webhook URL into Settings, or let the n8n or Zapier trigger set it for you.

What Flow API adds

MCP server for AI agents

Each number gets a link that Claude, ChatGPT, Codex, Cursor and n8n AI Agent can use directly.

Native n8n node and Zapier app

A WhatsApp trigger that sets its own webhook, plus pre-filled Make scenarios.

Agency dashboard

Every client number in one console, with restart and connection status per number.

20% recurring affiliate program

Earn on every client you bring, paid out on request.

See every connection on the integrations page.

Questions about switching

Is Flow API a drop-in replacement for Green API?

For the HTTP API, yes: Flow API accepts the same URL shape, method names, request bodies and webhook format. Code and SDKs built for Green API work after changing the base URL to https://flowapi.pro and the instance credentials.

How long does migrating from Green API take?

Most integrations move in a few minutes: create an instance, scan the QR code, then change the host and credentials in each module. The WhatsApp number is linked to Flow API as a new device.

What does Flow API cost?

$10 per number per month, $100 per number per year, or $400 per year for five numbers, with a 7-day free trial and no credit card required.

Try it on your own scenario

7 days free, one number, no credit card.

Start free trial

Green API is a trademark of its owner. Flow API is an independent service and is not affiliated with Green API, WhatsApp or Meta.