Integration · Email

Connect Claude & ChatGPT to Postmark

Ask your AI whether a customer got their password reset email, why an address bounced, or how many emails went out last week. It can search sent and received emails, read delivery events, bounces, opens and spam complaints, and reactivate bounced addresses. It can also send single or batch emails, from plain content or your Postmark templates.

Connect Postmark free

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

Try asking

“Did [email protected] get our order confirmation yesterday?”
The AI searches sent emails to that address for the date and reads the message's delivery events.
“Why is [email protected] bouncing?”
It lists bounces for the address and reads the bounce type, description and raw SMTP response.
“How did our sending look last week?”
It reads the outbound overview for the date range: sent, bounced, spam complaints, opens and clicks.

What your AI can do

Delivery and bounces

Search sent emails and read each message's delivery events, list bounces with type and raw SMTP response, and reactivate bounced addresses.

Stats and complaints

Get sending totals, opens, clicks, bounce counts by type and spam complaint counts for a date range, optionally by tag.

Send and templates

Send single emails or batches of up to 500, from plain content or your templates, and read templates and inbound emails.

“The customer fixed her mailbox. Reactivate the address.”
It checks that the bounce can be reactivated and turns sending to the address back on.
“Resend the welcome email to [email protected] using our welcome template.”
It finds the template by alias, fills in the variables and sends the email. Sent email cannot be recalled.
“Did we receive anything from [email protected] this week?”
It searches emails received on your inbound address by sender and date range.

20 tools for Postmark

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

activate_bounceVisible to othersReactivate a bounced address so Postmark sends to it again. Needs the bounce ID; only works if the bounce is marked as activatable.
get_bounceGet details of one bounce by bounce ID: type, recipient, description and whether it can be reactivated.
get_bounce_countsGet bounce counts per day and by bounce type for a date range, optionally by tag.
get_bounce_dumpGet the raw SMTP response source for one bounce by bounce ID.
get_delivery_statsGet a summary of inactive (suppressed) addresses and bounce counts by type for the server.
get_inbound_messageGet full details of one received inbound email by message ID.
get_outbound_messageGet full details of one sent email by message ID, including body, recipients and delivery events.
get_outbound_overviewGet sending totals for a date range: sent, bounced, spam complaints, opens and clicks. Optionally filter by tag.
get_serverGet the current Postmark server's settings: name, tracking options, inbound address and webhook URLs.
get_spam_complaint_countsGet spam complaint counts per day for a date range, optionally by tag.
get_templateGet one template by ID or alias, including its subject, HTML and text body.
list_bouncesList bounced emails, filterable by bounce type, recipient email, tag, message ID and date range.
list_templatesList the server's email templates with their IDs, names and aliases.
search_inbound_messagesSearch emails received by the server's inbound address, by sender, recipient, subject, status or date range.
search_message_opensList open events for sent emails, filterable by recipient, tag, email client, platform or country.
search_outbound_messagesSearch sent emails by recipient, sender, tag, status or date range (fromdate/todate). Returns message IDs, subjects and delivery status.
send_batch_emailsDeletesSend up to 500 separate emails in one call. Each item needs from, to, subject and a body. Sent email cannot be recalled.
send_batch_emails_with_templateDeletesSend up to 500 templated emails in one call. Each message needs from, to, a template ID or alias and its template_model. Sent email cannot be recalled.
send_emailVisible to othersSend one email right away. Needs from (a verified sender), to, subject and html_body or text_body; optional cc, bcc, tag and attachments. Sent email cannot be recalled.
send_email_with_templateVisible to othersSend one email built from a Postmark template. Needs from, to, the template ID or alias, and template_model with the variables to fill in. Sent email cannot be recalled.

Set up in three steps

1
Pick the app
Create a free PipMCP account and choose Postmark from the app list.
2
Paste your key
In Postmark, open Servers, select your server and go to the API Tokens tab. Copy the Server API token and paste it into PipMCP. Each Postmark server has its own token, so the connection covers the server you pick.
3
Add the link to your AI
You get a personal MCP link. Add it to Claude, ChatGPT or Cursor:
Click your name, then Settings › Connectors › Add custom connector. Paste your link as the Remote MCP server URL. Switch it on from the + menu in a chat.

Questions

What can the AI do in Postmark?

It can search sent and received emails, read message details and delivery events, list and read bounces, and get sending totals, opens, bounce counts and spam complaint counts. It can read templates and your server settings. If you switch those tools on, it can also send single or batch emails, with or without templates, and reactivate bounced addresses.

Does the AI see my Postmark API token?

No. Your server token 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 with delivery lookups and stats only. Sent email cannot be recalled, batch sends can reach up to 500 recipients at once, and reactivating a bounce starts sending to that address again. These 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 connect your own Postmark account, so anything Postmark charges for sending is between you and Postmark.

Which sender address does the AI use?

The AI has to use a sender address that is verified in your Postmark account, the same as any other sending through Postmark. It cannot send from an address you have not verified. If you only want support lookups, leave the send tools switched off.