3LT Letter Mail
Give AI assistants hands: send real USPS letters via MCP.
使うべきか
品質と安全性
ツール定義とプロトコルへの準拠に関する自動分析に基づいています。
コンテキストコスト
これは、サーバーのツールがモデルのコンテキストに読み込まれるたびに消費されるおおよそのトークン数です。数が多いほど、ほかのタスクに使える注意が減ります。
インストール
ワンクリックインストール
これを `claude_desktop_config.json` ファイルに追加してください:
{
"mcpServers": {
"3lt-letter-mail": {
"url": "https://3lgrouptechnology.com/mcp"
}
}
}リモートエンドポイント
https://3lgrouptechnology.com/mcpstreamable-httpできること
ツール一覧
ツール（3）
🟡draft_letter(api_key, to, from_address, html, pdf_path, ...)
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 draft is kept but flagged needs_review.
入力スキーマ
{
"type": "object",
"properties": {
"api_key": {
"type": "string",
"description": "your 3L-Group Technology API key (lms_...)."
},
"to": {
"additionalProperties": true,
"type": "object",
"description": "recipient address dict with name, address_line1, address_city,\naddress_state, address_zip (US)."
},
"from_address": {
"additionalProperties": true,
"type": "object",
"description": "sender address dict, same shape as `to`."
},
"html": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"default": null,
"description": "letter body as an HTML string (use this OR pdf_path)."
},
"pdf_path": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"default": null,
"description": "server-local path to a PDF to mail instead of html."
},
"color": {
"default": false,
"type": "boolean",
"description": "True for color printing, False for black & white."
},
"quantity": {
"default": 1,
"type": "integer",
"description": "number of identical letters (10+ gets the bulk rate)."
},
"description": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"default": null,
"description": "optional label for your own records."
},
"certified": {
"default": false,
"type": "boolean",
"description": "OPT-IN ONLY — True for USPS Certified Mail with Electronic\nReceipt (tracked, signature on delivery). Defaults to False, which\nsends standard First Class mail. Only set True when the customer\nexplicitly asked for certified mail: it costs significantly more\n(PostGrid's certified rate + the flat $1.00 service fee, roughly\n$11 per letter). Never default this to True."
}
},
"required": [
"api_key",
"to",
"from_address"
],
"additionalProperties": false
}出力スキーマ
{
"type": "object",
"additionalProperties": true
}🟡request_send(api_key, draft_id)
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 PENDING.
入力スキーマ
{
"type": "object",
"properties": {
"api_key": {
"type": "string",
"description": "your 3L-Group Technology API key (lms_...)."
},
"draft_id": {
"type": "integer",
"description": "the draft_id returned by draft_letter."
}
},
"required": [
"api_key",
"draft_id"
],
"additionalProperties": false
}出力スキーマ
{
"type": "object",
"additionalProperties": true
}🟡send_status(api_key, request_id)
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).
入力スキーマ
{
"type": "object",
"properties": {
"api_key": {
"type": "string",
"description": "your 3L-Group Technology API key (lms_...)."
},
"request_id": {
"type": "integer",
"description": "the request_id returned by request_send."
}
},
"required": [
"api_key",
"request_id"
],
"additionalProperties": false
}出力スキーマ
{
"type": "object",
"additionalProperties": true
}コミュニティ
エビデンス