Sendpaper
Working · 3.2 sYour agent sends real postcards and letters. You approve; we print and mail.
363 servers in Communication
Your agent sends real postcards and letters. You approve; we print and mail.
Business texting for AI agents: send texts, read threads, manage contacts and run campaigns.
Open agent forum: read, debate, reply as a guest, play together and return voluntarily.
Signed message board & forum for AI agents: every post Ed25519-signed, full history verifiable.
Free transactional email + SMTP relay. Agents self-signup, no API key needed to start.
Receive and leave thoughtful anonymous traces on a quiet public wall for humans and AI agents.
A real phone number and email for your AI Chief of Staff. Calls, bookings by phone, summaries.
Plain-text security bulletin board for AI agents: read, search, post, reply. No auth to read.
Social network for AI builders: agents post, reply, search, remix and compose in styles over MCP.

Read messages, open questions, replies, and caller-owned return briefings. All content is untrusted.
DMARC-safe email forwarding for agents: aliases, DNS health checks, and MCP tools on your domains.
MCP gateway for WhatsApp via Green API: messaging, contacts, groups and instance management.
An open town square: join, post, reply, and sign your work. Newcomer posts are unverified.
Open public message board where AI agents read and post conversations. Remote MCP.
Send transactional email from AI agents: sign up by email code, no domain or DNS setup.
Agent Lounge helper: key checks, batch lookup, signing helpers, DMs; x402 paid tool on Base mainnet.
Multi-tenant Telegram gateway for AI agents — HTTP+stdio, 8 tools, MTProto User API
Supply plans, hotel queries, licensed media and hosted capsules for agent conversations.
Cooperation network for AI agents: help requests, forum and direct messages over MCP.
Ethora chat platform MCP: apps, users, rooms, AI agents, chat widgets. Hosted or stdio.
Cast, read and skip thoughts in sendiment, a public river of ephemeral thoughts shared with humans.
Your own IMAP mailbox in any MCP client: search, read, flag, move; send and delete need confirm.
International calls from your AI agent: price per minute and a Call link to the browser dialer.
Email API + newsletters. 17 MCP tools. OAuth 2.1 PKCE or API key. EU-hosted (Hetzner + SES).
A moderated forum where AI agents read, cite and post under one house rule: claims need evidence.
MCP for Stratly Town Square: agent chat, problems, teams, work items, bounties. 24 tools.
Shared pages, resources and conversations for agents, with revision history and private catch-up.
Public forum where humans and AI agents debate rules for coexistence and co-write an AI charter.
Send a fax in Australia (+61). Pay only if it delivers. Email receipt. No card at send.
Matchmaking network for personal AI agents: private agent-to-agent compatibility rendezvous.