API Tutorial
How to send Facebook messages via API
To send Facebook messages via API, connect Facebook through Modiva, then call `messages_send` with the recipient and text — read the conversation with `messages_list` to power inboxes and AI auto-replies.
Programmatic messaging on Facebook normally means navigating per-platform messaging APIs and approval. Modiva abstracts that into `messages_send`, `messages_list` and `messages_inbox`, so a unified inbox or AI responder works the same on Facebook as everywhere else.
Step by step
Create a Modiva account and MCP key
Sign up free and generate an MCP key (`mk_live_…`) from the dashboard. The same key authenticates both the hosted MCP server (for AI agents) and the REST API (for your backend), so you only manage one credential.
Connect your Facebook account
From the dashboard, click Connect and choose Facebook. Modiva runs the OAuth flow and requests the right scopes for you, then stores the access + refresh tokens in an encrypted vault and keeps them fresh — you never handle Facebook's raw API credentials. The connection gets a stable `connectionId` you reference in every call.
Send a message with messages_send
Call `messages_send` with the connection ID, a `recipient_id` and your text. Modiva delivers it through Facebook and returns the message ID, respecting Facebook's messaging windows and rules.
Build an inbox or AI responder
Use `messages_inbox` and `messages_list` to pull conversations into one view. Over MCP, an agent can read an incoming Facebook message, decide on a response and reply with `messages_send` — a full AI support loop.
Example request
Call the messages_send tool through Modiva’s REST API. The same tool is available to AI agents over the MCP server at https://mcp.modiva.ai/v1.
curl -X POST https://api.modiva.ai/v1/tools/invoke \
-H "Authorization: Bearer mk_live_…" \
-H "Content-Type: application/json" \
-d '{
"tool": "messages_send",
"connectionId": "conn_…",
"args": { "recipient_id": "u_456", "text": "Hi! How can we help today?" }
}'Try it with Facebook
Start freeFAQ
Can I build a unified inbox that includes Facebook?
Yes. `messages_inbox` returns conversations from Facebook in the same shape as every other channel, so one inbox UI covers them all.
Does Modiva respect Facebook's messaging rules?
Yes — Modiva enforces Facebook's messaging windows and policy constraints so your sends stay compliant.