Send a cross process message if message channel is connected.

View-side bridge for MCP Apps UI views: the ui/* postMessage protocol as two tiny functions (onData / sendMessage).

stream LLM output to telegram via sendMessageDraft + finalize sendMessage

In-crew agent-to-agent SendMessage tool with traceparent envelopes (Section 22)

Routes Task/SendMessage invocations transparently across federated CrewHaus deployments via federation-protocol + federation-discovery (Section 34)

n8n community node for Telegram Business Mode sendMessage

Built-in `SendMessage` tool for cross-channel addressing (Section 12). Permission-gated; fail-closed without an explicit allow rule.

Telegram connector for Hogsend — inbound activity (messages, `/start` deep-link linking) → `IngestEvent`, plus journey-callable outbound actions (`sendMessage`, `dm`) over the Bot API.

Slack channel bond — implements @molecule/api-channel for sendMessage, webhook signature verification, and inbound event parsing.

Better WebExtension sendMessage API

Facebook Messenger channel bond — implements @molecule/api-channel for sendMessage via the Send API, X-Hub-Signature-256 webhook verification, and inbound entry/messaging parsing.

A wrapper(in JS) built over socket.io which allows access to simple functions to get a listener running, addChannel, deleteChannel, sendMessage etc.

Mount a nifra agent as an Agent2Agent (A2A) protocol server - the agent card on GET, the A2A 1.0 JSON-RPC binding on POST with SendMessage, streaming SendStreamingMessage over SSE, and GetTask projected from the runner's turn state. A protocol bridge over

Chat shell combining `hb-messages-list` (thread from `messages`, `authors`, `options`) and `hb-messages-send` (composer). Optional `message` JSON can seed the draft text. Forwards the child `sendMessage` event (text, files, tags) to the host as `sendMessa

- sendMessage(obj)

WhatsApp channel bond — implements @molecule/api-channel via the WhatsApp Cloud API for sendMessage (text/template/interactive), x-hub-signature-256 HMAC-SHA256 webhook verification, and inbound message parsing.

Express server for Agentforce agent APIs - sendMessage, compile, get/update agent metadata

mini telegram notifier extract sendMessage, sendPhoto, sendAudio, sendDocument API from telegram main API documentation

MCP server for chat-chat teammate messaging: ListRecipients, SendMessage, ReadThread, Reply.

Light weight, type-safe wrapper around the web extension messaging APIs. Supports all browsers (Chrome, Firefox, Safari)