Integration · Marketing

Connect Claude & ChatGPT to PostGrid Print & Mail

Ask your AI to send a letter or postcard by physical mail through PostGrid. It can create contacts with mailing addresses, print and mail letters, postcards, self-mailers and cheques from HTML, and reuse your templates. It can check the status of each mailing, cancel one before it goes to print and look at visits to your trackers.

Connect PostGrid Print & Mail free

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

Try asking

“Add Acme Ltd, 100 King St W, Toronto, ON as a contact.”
The AI creates a contact with the company name and mailing address.
“Mail a thank-you letter to Acme from our office address.”
It creates a letter with Acme as recipient, your office contact as sender and the text as HTML, and PostGrid prints and mails it.
“Send a postcard with our spring offer to contact 4821.”
It creates a postcard with the size and front and back design you give it, with an optional send date.

What your AI can do

Letters, postcards and cheques

Print and mail letters, postcards, self-mailers and cheques, and cancel an order before it goes to print.

Contacts and templates

Create and look up contacts with mailing addresses, and create, update and reuse HTML templates.

Tracking and status

Read the status of each mailing, list events, and see visits to your trackers.

“What is the status of the letter we sent to Acme last week?”
It finds the letter and reads its status, recipient and tracking details.
“Cancel the letter I just created, the address is wrong.”
It cancels the letter before it goes to print, with a note. A cancellation cannot be undone.
“Which templates do we have?”
It lists your saved HTML templates with their descriptions.

67 tools for PostGrid Print & Mail

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

cancel_letterChanges dataCancel a letter by `letter_id` before it goes to print, with an optional `note`. Cannot be undone.
cancel_postcardChanges dataCancel a postcard by `postcard_id` before it goes to print, with an optional `note`. Cannot be undone.
create_accountChanges dataCreate a new account. API summary: Create Canadian Bank Account.
create_boxChanges dataCreate a new box. API summary: Create Box With Cheques.
create_box_progressionChanges dataCreate a new progression for a box. API summary: Progress Test Box.
create_chequeChanges dataCreate a new cheque. API summary: Create Cheque.
create_cheque_cancellationChanges dataCreate a new cancellation for a cheque. API summary: Cancel Cheque With Note.
create_cheque_progressionChanges dataCreate a new progression for a cheque. API summary: Progress Test Cheque.
create_contactChanges dataCreate a contact with a name or `company_name` and a mailing address (`address_line1`, `city`, `province_or_state`, `postal_or_zip`, `country_code`); optional email and phone. Use its ID as `to` or `from` when mailing.
create_letterChanges dataPrint and mail a letter. Pass recipient contact ID in `to`, sender contact ID in `from`, and the content in `html`; optional `color`, `double_sided`, `mailing_class` and `express`. With a live key this sends real mail and is billed to the account.
create_letter_progressionChanges dataCreate a new progression for a letter. API summary: Progress Test Letter.
create_order_fillChanges dataCreate a new fill for a order. API summary: Fill Test Return Envelope Order.
create_postcardChanges dataPrint and mail a postcard. Pass recipient contact ID in `to`, sender contact ID in `from`, `size`, and the design in `front_html` and `back_html`; optional `send_date` and `mailing_class`. With a live key this sends real mail and is billed to the account.
create_postcard_progressionChanges dataCreate a new progression for a postcard. API summary: Progress Test Postcard.
create_return_envelope_orderChanges dataCreate a new order for a return envelope. API summary: Create Return Envelope Order.
create_self_mailerChanges dataPrint and mail a self-mailer. Pass recipient contact ID in `to`, sender contact ID in `from`, `size`, and the design in `inside_html` and `outside_html`; optional `send_date`. With a live key this sends real mail and is billed to the account.
create_self_mailer_progressionChanges dataCreate a new progression for a self mailer. API summary: Progress Test Self Mailer.
create_templateChanges dataCreate a reusable HTML template with `html` and a `description`.
create_template_editor_sessionChanges dataCreate a new template editor session. API summary: Create Session.
create_trackerChanges dataCreate a new tracker. API summary: Create Tracker.
create_webhookDeletesCreate a new webhook. Destructive action; may require approval. API summary: Create Webhook.
delete_accountDeletesPermanently delete a account by account id. Destructive action; may require approval. API summary: Delete Bank Account.
delete_boxDeletesPermanently delete a box by box id. Destructive action; may require approval. API summary: Cancel Box.
delete_chequeDeletesPermanently delete a cheque by cheque id. Destructive action; may require approval. API summary: Cancel Cheque.
delete_contactDeletesPermanently delete a contact by `contact_id`.
delete_letterDeletesPermanently delete a letter by letter id. Destructive action; may require approval. API summary: Cancel Letter.
delete_postcardDeletesPermanently delete a postcard by postcard id. Destructive action; may require approval. API summary: Cancel Postcard.
delete_return_envelope_orderDeletesPermanently delete a order by order id. Destructive action; may require approval. API summary: Cancel Return Envelope Order.
delete_self_mailerDeletesPermanently delete a self mailer by self mailer id. Destructive action; may require approval. API summary: Cancel Self Mailers.
delete_templateDeletesPermanently delete a template by template id. Destructive action; may require approval. API summary: Delete Template.
delete_template_editor_sessionDeletesPermanently delete a template editor session by template editor session id. Destructive action; may require approval. API summary: Delete Session.
delete_trackerDeletesPermanently delete a tracker by tracker id. Destructive action; may require approval. API summary: Delete Tracker.
delete_webhookDeletesPermanently delete a webhook by webhook id. Destructive action; may require approval. API summary: Delete Webhook.
get_accountGet one account by account id. API summary: Get Bank Account.
get_boxGet one box by box id. API summary: Get Box.
get_chequeGet one cheque by `cheque_id`, including amount, recipient, status and tracking details.
get_contactGet one contact by `contact_id`, including the address and its verification status.
get_letterGet one letter by `letter_id`, including its status, recipient and tracking details.
get_postcardGet one postcard by `postcard_id`, including its status and tracking details.
get_return_envelopeGet one return envelope by return envelope id. API summary: Get Return Envelope.
get_return_envelope_orderGet one order for a return envelope by order id. API summary: Get Return Envelope Order.
get_self_mailerGet one self-mailer by `self_mailer_id`, including its status and tracking details.
get_templateGet one template by `template_id`, including its HTML.
get_trackerGet one tracker by tracker id. API summary: Get Tracker.
get_v1_envelopesGet one v1. API summary: List Return Envelopes.
get_webhookGet one webhook by webhook id. API summary: Get Webhook.
list_accountsList accounts. API summary: List Bank Accounts.
list_boxesList boxes.
list_cheque_with_deposit_ready_pdfsList with deposit ready pdfs for a cheque. API summary: Get Deposit-Ready Digital Check.
list_chequesList cheques that have been sent or scheduled, with their status.
list_contactsList saved contacts (mail recipients and senders).
list_document_n_p_au_ae_kv_kuzx_qbcl46_jg_wiesList document n p au ae kv kuzx qbcl46 jg wies. API summary: Get Document.
list_eventsList events.
list_lettersList letters that have been sent or scheduled, with their status.
list_postcardsList postcards that have been sent or scheduled, with their status.
list_return_envelope_ordersList orders for a return envelope. API summary: List Return Envelope Orders.
list_self_mailersList self-mailers (folded mail pieces) that have been sent or scheduled.
list_template_editor_sessionsList template editor sessions. API summary: List Sessions.
list_templatesList saved HTML templates for letters and postcards.
list_tracker_visitsList visits for a tracker. API summary: List Tracker Visits.
list_trackersList trackers.
list_webhook_invocationsList invocations for a webhook. API summary: List Webhook Invocations.
list_webhooksList webhooks.
submit_v1_envelopesVisible to othersReturn a v1. Has effects visible outside this system. API summary: Create Return Envelope.
update_templateChanges dataUpdate a template's `html` or `description` by `template_id`.
update_trackerChanges dataUpdate an existing tracker identified by tracker id. API summary: Update Tracker.
update_webhookDeletesUpdate an existing webhook identified by webhook id. Destructive action; may require approval. API summary: Update Webhook.

Set up in three steps

1
Pick the app
Create a free HeyMyApps account and choose PostGrid Print & Mail from the app list.
2
Paste your key
Paste your PostGrid API key. Log in to the PostGrid dashboard, open Settings and copy the key. A test key (test_sk_...) lets you try things out, and test orders are never printed or mailed. Use the live key (live_sk_...) for real sends.
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 PostGrid Print & Mail?

It can read contacts, letters, postcards, self-mailers, cheques, templates, trackers, return envelopes, webhooks and events. It can create contacts and templates, print and mail letters, postcards, self-mailers and cheques, cancel mailings before print, and delete records, if you switch those tools on.

Does the AI see my PostGrid credentials?

No. Your PostGrid credentials are encrypted at rest and never shown to the AI. After you save them, they are 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 with lookups only. With a live key, a new letter, postcard or cheque is printed and mailed for real, and a cancellation cannot be undone, so those actions 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 HeyMyApps 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?

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

Can I try it without mailing anything?

Yes. Connect with your PostGrid test key, which starts with test_sk_. Test orders are never printed or mailed, so you can see how the AI creates letters and postcards before you switch to the live key.