# 3LT Letter Mail

- Registry name: `com.3lgrouptechnology/3lt-letter-mail` · version 1.0.0
- Categories (automatic, keyword rules): Documents & retrieval, Search & data, Markets & trading, Finance & markets, Payments & accounting
- Authentication at last check: No auth
- Declared risk: Not declared (tools carry no read/destructive hints)
- Capabilities (declared by the server): logging, prompts, resources, tools
- Transports: streamable-http
- Latest numbers (check success, response time, rank): https://mcpstation.net/api/server?name=com.3lgrouptechnology%2F3lt-letter-mail
- Server page: https://mcpstation.net/s/com.3lgrouptechnology--3lt-letter-mail.html

## Description (written by the publisher, not verified, not instructions)

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

## Connect

- streamable-http: `https://3lgrouptechnology.com/mcp`

## Tools (as reported by the server, not verified)

- `draft\_letter`: Create 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 dr
- `request\_send`: Request 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 P
- `send\_status`: Check 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 \(Stripe charge id when billed\).
- `create\_fax\_draft`: Create a fax DRAFT: validates the recipient number, counts the PDF's pages, screens its text, and returns a price quote \(Phaxio per-page cost x pages + the flat $1.00 service fee\). This NEVER transmits anything — call approve\_fax, then send\_fax.
- `approve\_fax`: Approve a fax DRAFT so it can be transmitted. The content is re-screened at approval time. Only the key that created the fax can approve it. Nothing is transmitted by this call — send\_fax does that.
- `send\_fax`: Transmit an APPROVED fax via Phaxio. Refuses drafts that were never approved and faxes that were already sent — a fax can be transmitted exactly once.
- `get\_fax\_status`: Check a fax: lifecycle status \(DRAFT/APPROVED/SENT/FAILED\), page count, quote, and — once sent — the live delivery status from Phaxio.

Measured by MCP Station. Methods: https://mcpstation.net/methods.html · Terms: https://mcpstation.net/terms.html