3LT Letter Mail

com.3lgrouptechnology/3lt-letter-mail · v1.0.0 · productivity

3LT Letter Mail is healthy: it completed an MCP handshake in 1076 ms and exposes 3 tools.

Give AI assistants hands: send real USPS letters via MCP.

Endpoint: https://3lgrouptechnology.com/mcp (streamable-http)

Repository · JSON · Add to my inventory

Facts

Users (last 30 days)0
HandshakeHealthy
Auth neededNone
Tool count3
Latency1076 ms
Last checked (UTC)2026-10-17T01:30:44.111Z

Health history

Checked (UTC)StatusLatencyError
2026-10-17T01:30:44.111ZHealthy1076
2026-10-15T18:40:10.465ZHealthy1574
2026-10-14T17:40:42.940ZHealthy3269

Tools (3)

draft_letterCreate a letter DRAFT: verifies the recipient address with PostGrid, screens content, and returns a price quote. This NEVER mails anything. Pass EITHER html (letter body as an HTML string) OR pdf_path (path to a PDF file on the server). PDF text is extracted for screening; if extraction fails the d
request_sendRequest that a draft be mailed. approval-tier keys: creates a PENDING request and returns a one-tap Allow/Deny approval_url for the human. Nothing is mailed until Allow. on_command keys: may auto-send inside guardrails (spend caps, content screening, anomaly detection); anything outside them stays
send_statusCheck a send request: status (PENDING/SENT/REJECTED/FAILED), the key's trust tier and tier decision, approval state (+approval_url while pending), and billing state (Stripe charge id when billed).