Premier Letters

Send real pen-written letters, cards and postcards: quote, preview, order and track by mail.

CommunityOnlineAPI key requiredGlobalFreeCan modify data

What it can do

    What data it sees

    Do you need an account

    An API key from the service settings is required

    Send real pen-written letters, cards and postcards: quote, preview, order and track by mail.

    How to connect

    How to connect Premier Letters to Claude

    The server address to paste into Claude settings:

    https://www.premierletters.com/api/mcp

    1. Open Claude (claude.ai or the desktop app).
    2. Go to Settings → Connectors.
    3. Click Add custom connector.
    4. Paste the server address copied below into Remote MCP server URL and click Add.
    5. In a chat, click + → Connectors and switch the new connector on.

    Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

    Authorization

    After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

    How to connect Premier Letters to ChatGPT

    The server address to paste into ChatGPT settings:

    https://www.premierletters.com/api/mcp

    1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
    2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
    3. Open Settings → Connectors and click Create.
    4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
    5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
    6. In a new chat open + → Apps/Connectors and enable the connector.

    OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

    Authorization

    On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

    How to connect Premier Letters to Cursor

    The server address to paste into Cursor settings:

    https://www.premierletters.com/api/mcp

    Fastest: click Open in Cursor below and confirm the prompt.

    Manually:

    1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
    2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
    3. Save the file. The server appears in the MCP list; authorize it there if asked.

    Authorization

    If the service needs sign-in, an authorize button appears next to the server in the MCP list.

    Server tool list (8)

    Raw names from tools/list. Only developers need these.

    get_pricingGet a live price quote for a Premier Letters order. Pass char_count (or letter_count for a rough estimate) plus optional mailing_option and paper_type to get a per-piece and total price, in cents. No account needed. Orders under 5 pieces carry a $0.99 per-piece handling fee (included in total_cents), waived when paid from a prepaid balance.
    list_handwriting_stylesList available handwriting styles (fonts) for a letter order. Use the returned "id" as options.handwriting_style / handwriting_style when creating an order or previewing.
    list_templatesList the authenticated user's saved letter templates.
    verify_addressVerify and standardize a US mailing address via USPS. Use before create_order to catch typos and get the USPS-standardized form.
    preview_letterRender a preview of a handwritten letter (as an SVG image) and get its price, before creating an order. Does not save anything.
    create_orderCreate and pay for a Premier Letters order — a real, handwritten letter mailed via USPS. Requires a Premier Letters API key. Use get_pricing or preview_letter first to confirm the price. For payment, "card_on_file" charges the caller's saved card immediately, "balance" pays from the prepaid account balance (no small-order handling fee; fails with insufficient_balance when short), or "checkout_session" returns a checkout_url for the human to complete payment in a browser.
    get_order_statusGet an order's status, delivery/tracking summary, and per-recipient mail status.
    list_ordersList the authenticated user's recent orders.