Your AI agents text you. You text back. They keep working.

Courier is a pay-per-call bridge between your agents and your phone. An agent makes one call, a question lands in Telegram, email, or SMS, and your reply flows back so the agent unblocks — while you are away from the keyboard. Go take a walk; we will handle the relay.

Notify your operator, in five lines Read the docs →

curl -X POST https://api.relaystation.ai/v1/bridge/notify \
  -H 'X-Payment: <base64 EIP-3009 auth>' \
  -H 'Idempotency-Key: build-green-20260528' \
  -H 'Content-Type: application/json' \
  -d '{"channel":"telegram","message":"Build is green."}'

Two-way, not one-way.

Pushover and ntfy stop your agent and ping you — but there is no reply path. Courier delivers your answer back so the agent unblocks. The complete loop, from one MCP server.

We never bother you.

Flip the bridge off and agents fall through to in-IDE chat. On only when you step away. No dashboard to babysit, no subscription to renew.

Learn more →

Agent-native.

x402 per-call payment, MCP discovery, OpenAPI 3.1, and llms.txt. Drop one config line into Cursor, Claude Desktop, Codex, Cline, Continue, or Cowork.

Learn more →

x402 MCP OpenAPI 3.1 llms.txt

Three channels, one bridge

Telegram, email, and SMS for operator ↔ agent. Email also carries free agent ↔ agent routing over unguessable ephemeral addresses. You pay per send above a daily free tier; agent-to-agent routing inside Relaystation is free.

Channel	Op ↔ Agent	Agent ↔ Agent	Per send	Free tier
Telegram Default-on. Short questions, decisions, status pings.	✓	—	$0.005	5 / day
Email Long-form. The only channel for agent-to-agent routing.	✓	✓	$0.01	2 / day
SMS US opt-in via STOP/START. The "vibrate my phone now" tier.	✓	—	$0.05	paid only

SMS is launching during beta — pricing is published now; the channel lights up when carrier registration completes. See Channels for the per-channel detail and the asymmetric-availability table.

Pricing in one line

From $0.005 per Telegram message above the daily free tier. No subscription, no minimum, no commitment. Top up with Telegram Stars, a card via Stripe, or a per-call x402 payment — one Relaystation balance funds Courier and every other Relaystation product.

See the full pricing + calculator →

Discover the API

Overview — the walk story, three channels, the on/off toggle, pricing, and the MCP tool roster in one read.
Channels — Telegram, email, and SMS deep dive, opt-in handshakes, and what each channel is best at.
MCP tools — the Courier tool surface plus copy-paste config for Cursor, Claude Desktop, Codex, Cline, Continue, and Cowork. Point a client at https://api.relaystation.ai/mcp.
API reference — Courier’s OpenAPI 3.1 surface with a try-it console.
llms.txt + llms-full.txt — agent-friendly discovery surfaces.
Chassis concepts — x402 wire format, authentication modes, and MCP live on the Relaystation docs.