Integration · Marketing

Connect Claude & ChatGPT to LettrLabs

Ask your AI to set up a handwritten mail order in LettrLabs from one of your templates, add the recipients and show you the proof. It can preview what an order would cost before checkout, follow the delivery status of each recipient and pull results for past orders. Nothing is mailed or charged until you check out the order in LettrLabs.

Connect LettrLabs free

Free plan, no credit card. Takes about a minute.

Try asking

“Start a new order from our thank-you template in a relaxed handwriting style.”
The AI finds the template and the handwriting fonts on your account and creates a draft order. Nothing is mailed or charged yet.
“Add these five customers to the draft order.”
It adds the recipients to the draft order with their address and personal details.
“Show me the proof for order 5812.”
It gets the PDF preview of the order, so you can check the design before it goes out.

What your AI can do

Orders and templates

List your templates and handwriting fonts, create draft orders with optional QR codes, and list orders by status, payment, product or postage.

Recipients and proofs

Add, list and remove recipients on a draft order, and get the proof for the whole order or for one recipient.

Cost, delivery and results

Preview checkout cost by postage and production speed, check delivery status per recipient, and read transactions and analytics for orders.

“What would order 5812 cost with first-class postage?”
It previews checkout with FirstClass postage and your chosen production speed, without placing or charging the order.
“Has the card to Maria Jensen on order 5790 been delivered?”
It reads the delivery status of the recipients on the order, narrowed to that name.
“How did orders 5701 and 5702 perform?”
It gets the results and analytics for both orders.

16 tools for LettrLabs

These tools are switched on when you connect. You can switch any of them off, or require your approval before it runs.

add_order_recipientsVisible to othersAdd recipients to a draft order by `order_id`. Each item in `recipients` needs `id`, `address`, `personal` and `metadata` objects.
create_orderChanges dataCreate a new draft mail order from a template (`template_id`), optionally with a `handwriting_font` and QR code settings (`use_qr`, `qr_url`). Nothing is mailed or charged until the order is checked out in LettrLabs.
delete_orderDeletesDelete a draft order by `order_id`. This cannot be undone.
get_order_analyticsGet results and analytics for one or more orders; pass order IDs comma-separated in `id`.
get_order_proofGet the proof (PDF preview) of an order by `order_id`, to check the design before it is sent.
get_profileGet the connected LettrLabs account's profile. Use to confirm which account you are working in.
get_recipient_delivery_statusGet the delivery status of recipients on an order by `order_id`, optionally narrowed by `first_name`, `last_name` or `address`.
get_recipient_proofGet the proof for one recipient on an order, by `order_id` and `recipient` ID.
get_templateGet one template by `template_id`, including its card design and message.
list_handwriting_fontsList the handwriting styles available to your account, for the `handwriting_font` option when creating an order.
list_order_recipientsList the recipients on an order by `order_id`, optionally filtered with `query` (name, address or organization).
list_order_transactionsList payment transactions for one or more orders; pass order IDs comma-separated in `id`.
list_ordersList orders, filtered by `status`, `paid`, `product` or `postage`; set `show_recipients` to include recipients. Paged with `page` and `limit`.
list_templatesList your saved mail templates (paged with `page` and `limit`). A template's ID is what you pass to create_order.
preview_order_checkoutPreview what checking out an order by `order_id` would cost, for a given `postage` (Standard, FirstClass) and `production` speed. Does not place or charge the order.
remove_order_recipientsMoves moneyRemove recipients from a draft order by `order_id` and `recipients_ids`. This cannot be undone.

Set up in three steps

1
Pick the app
Create a free PipMCP account and choose LettrLabs from the app list.
2
Paste your key
Paste your LettrLabs public API key. In the LettrLabs app open Automations, go to Setup, select OpenAPI, click Manage and then Generate Key. Copy the key right away, because it is shown only once.
3
Add the link to your AI
You get a personal MCP link. Add it to Claude, ChatGPT or Cursor:
1. Click your name, then Settings › Connectors › Add custom connector.
2. Paste your link as the Remote MCP server URL.
3. Switch it on from the + menu in a chat.

Questions

What can the AI do in LettrLabs?

The AI can read your profile, templates, handwriting fonts, orders, recipients, proofs, delivery status, transactions and order analytics. It can create draft orders, add or remove recipients on a draft, delete a draft order and preview what checkout would cost.

Does the AI see my LettrLabs API key?

No. Your LettrLabs API key is encrypted at rest and never shown to the AI. After you save it, it is not shown again, not even to you. The AI only sees the results of the tools it calls.

Can I control what the AI is allowed to do?

Yes. You choose which tools are switched on, so you can start read-only. Removing recipients and deleting a draft order cannot be undone, and both can require your approval before they run. Every tool call is logged.

Does it work with ChatGPT?

Yes. In ChatGPT go to Settings › Apps & Connectors › Advanced and turn on Developer mode, then add your PipMCP link. Developer mode needs a paid ChatGPT plan: Plus, Pro, Business or Enterprise. The same link also works in Claude (Settings › Connectors › Add custom connector), Cursor and other MCP clients.

What does it cost?

PipMCP has a free plan with no credit card required. Paid plans bill per completed task. You also need your own LettrLabs account, and anything LettrLabs charges for mail is between you and LettrLabs.

Will the AI mail anything or charge my LettrLabs account?

No. The AI creates draft orders and can preview what checkout would cost, but it has no tool that checks out an order. Nothing is mailed or charged until you check out the order yourself in LettrLabs.