"Messenger" matching MCP servers:

Enables remote Model Context Protocol clients to securely read, search, and send Signal Messenger messages through an HTTP interface backed by a personal signal-cli daemon.

Enables reading and replying to direct messages, comments, and templates across Instagram, WhatsApp, and Messenger through official Meta Business APIs, with support for human handover and AI assistant controls.

Avito business API in your AI assistant: listings and statistics, buyer messenger, orders and Avito Delivery, bulk upload, promotion and reviews. 64 methods live in a YAML catalog the server executes, the agent searches it in plain language, and every method carries an access class so writes and irreversible calls ask for confirmation.

Universal MCP server for the Avito API (Russia's largest classifieds marketplace), built for autonomous AI agents to operate an account hands-free — 145 tools across 18 domains (listings, messenger, orders, delivery, promotion, autoload, reviews, analytics). Safe-by-default: dry-run, idempotency, structured errors, confirmation flow.

Proof of control for AI agents, through the proof.holdings API: verify domains, phone numbers and messenger accounts, ask a human to approve an action, and issue and verify Proofs of Delegation.