All servers · Documents & retrieval · Markets & trading · Payments & accounting

3LT Letter Mail

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

Tools changed (7 days)

Measured by MCP Station

Last check	Reachable
Checked at	—
Check success 7 / 30 days	—
First-try success 30 days	—
Median response	—
Lookups 30 days	—
Authentication	No auth
MCP version	2025-06-18
Rank score	—
Declared risk	Not declared (tools carry no read/destructive hints)
Capabilities declared	logging, prompts, resources, tools
Tool definitions	7 tools · with description 100% · input schema is an object 100% · read/destructive hints 0%

Description written by the publisher, not verified

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

Connect

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

claude mcp add --transport http 3lt-letter-mail https://3lgrouptechnology.com/mcp

{
  "mcpServers": {
    "3lt-letter-mail": {
      "url": "https://3lgrouptechnology.com/mcp"
    }
  }
}

Tools as reported by the server

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.

Tool changes

2026-10-22: draft_letter, request_send, send_status, create_fax_draft, approve_fax, send_fax, get_fax_status
2026-10-16: draft_letter, request_send, send_status

Repository · JSON · Text for agents · Registry updated 2026-10-03