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Postmark MCP connector

Connect Postmark to Elaichi and Claude, ChatGPT, Cursor, or any MCP client can send emails, check bounces and delivery stats, and manage templates and servers as the signed-in person, with every action logged.

  • How it connects. Connects with an API key. The credential goes into a vault nobody reads back.

  • One address. https://api.elaichi.ai/mcp, the same for every user.

  • Their own access. An agent never gets more than the person it acts for.

How to connect

How to connect Postmark to Claude, ChatGPT or Cursor

Two steps, about a minute.

1

In Elaichi

Connect Postmark once

  1. Open Connections, choose Add connection, and pick Postmark.

  2. Optionally set Share with to give a team access, then press Connect.

  3. Paste a Postmark API key. One person generates a token in Postmark and pastes it once. Everyone else works through Share with, and never sees it.

The credential is vaulted. Nobody reads it back, not even the AI.

Add connection

Choose a connector.

postmark
Postmark
Amply
Gmail
Mailchimp
Mailtrap
Outlook Mail
2

In your AI client

Point it at one endpoint

Everyone in the organization uses the same address, and each person only ever reaches what their own account allows.

Connect Postmark to Claude

  1. 1

    Open Customize, then Connectors.

  2. 2

    Press Add.

  3. 3

    Name it, paste the MCP server URL, then Continue.

    https://api.elaichi.ai/mcp
  4. 4

    Sign in and approve.

On Team and Enterprise, an Owner adds it once. Everyone else turns it on for themselves.

Connect Postmark to ChatGPT

  1. 1

    Open Plugins, then press the + button.

  2. 2

    Name it and paste the endpoint into Server URL.

    https://api.elaichi.ai/mcp
  3. 3

    Leave Authentication on OAuth, then tick the risk acknowledgement.

  4. 4

    Press Create, then sign in and approve.

Works on the web today. The plugin directory lives at chatgpt.com/plugins.

Connect Postmark to Cursor

  1. 1

    Open ~/.cursor/mcp.json.

  2. 2

    Add the endpoint under mcpServers.

    https://api.elaichi.ai/mcp
  3. 3

    Reload Cursor, then sign in and approve.

~/.cursor/mcp.json

{
  "mcpServers": {
    "elaichi": {
      "url": "https://api.elaichi.ai/mcp"
    }
  }
}

Set up per machine, so repeat it on each computer you work from.

Connect Postmark to any MCP client

  1. 1

    Add the endpoint as a remote MCP server.

    https://api.elaichi.ai/mcp
  2. 2

    Sign in and approve.

{
  "mcpServers": {
    "elaichi": {
      "url": "https://api.elaichi.ai/mcp"
    }
  }
}

The Elaichi Agent already has these tools, with nothing to set up.

Use cases

What teams do with Postmark through Elaichi

Every one of these runs inside the access the person already has, and lands in the same audit log.

  • Support

    Find out why a customer's email bounced

    Ask which messages to a customer bounced, read the bounce details, and reactivate the address once the problem is fixed, all from the chat you are already in.

  • Customer Success

    Send a templated email to a list of accounts

    Pick an existing Postmark template, fill in each customer's details, and send the batch in one go instead of copying names into a form one at a time.

  • Product

    Draft and validate a new notification template

    Write a new welcome or password reset template, check that every placeholder renders correctly, and save it to the right Postmark server before anyone ships it.

  • Engineering

    Push templates from staging to production

    Once a template has been reviewed on the staging server, move it to the production server and confirm the copy matches, with the change recorded against your name.

  • Operations

    Check delivery health across servers

    Ask for this week's delivery stats and bounce counts on each Postmark server, then get a plain summary of which streams need attention.

  • Finance

    Send receipts and billing notices on time

    Send invoice reminders and payment receipts through the billing template, and confirm each one was delivered rather than bounced before closing the month.

Try asking

  • “Show me yesterday's Postmark bounces by tag.”
  • “Send the welcome template to this new customer.”
  • “What is our Postmark delivery rate this week?”

See all 84 Postmark tools below

AI tools

Postmark tools for your AI agents

84 tools are ready to call through Elaichi's MCP endpoint the moment you connect Postmark, governed by the same roles, restrictions, and audit log as everything else in Elaichi.

See it in Elaichi

What connecting Postmark gets you

6 screens from the product, each doing one job for your Postmark account.

The agent

Ask about bounces, get real answers.

Type a question in plain language and read live Postmark delivery stats.

  • emails
  • bounces
  • templates
  • delivery stats

Ask Elaichi to work across your apps.

Show me yesterday's Postmark bounces by tag.

Send the welcome template to this new customer.

What is our Postmark delivery rate this week?

Also runs in Claude, ChatGPT or Cursor

MCP clients

One Postmark endpoint for every MCP client.

Claude, ChatGPT and Cursor connect over OAuth, no SDK, no shared API key.

ElaichiMCP clients
Claude ChatGPT Cursor

Copy the endpoint

https://api.elaichi.ai/mcp
Client Connected by Status Last used
Claude
E

Emma Laurent

• Connected 4 minutes ago
Cursor
S

Sofia Ricci

• Connected 2 hours ago
ChatGPT
C

Clara Nowak

• Connected Yesterday

Tool catalog

84 Postmark tools ready on connect.

Send emails, pull bounces and manage templates without writing custom code.

  • Create a Postmark email
  • Postmark emails bulk create
  • Create a Postmark bulk email
  • Get single Postmark bulk email by ID
ElaichiTools
Tool Action Description
Create a Postmark email Create Send a single transactional email via Postmark. Returns the message ID, submission timestamp, and delivery status. Required: From, To, Subject, and at least one of HtmlBody or TextBody.
Postmark emails bulk create Create Send a batch of emails in a single request via Postmark. Returns an array of per-message results, each including the message ID and status. Required: Messages array where each entry requires From, To, Subject, and at least one of HtmlBody or TextBody.
Create a Postmark bulk email Create Send a batch of bulk emails through Postmark. Returns details about the submitted bulk send operation. Required: a valid request body containing the messages to be delivered.
Get single Postmark bulk email by ID Get Get the status and details of a Postmark bulk email batch by id. Returns information about the bulk send operation identified by the supplied id. Required: id.
Create a Postmark templated email Create Send a single Postmark email rendered from a template. Returns the submitted message id and status. Required: `From`, `To`, and either `TemplateId` or `TemplateAlias`, plus `TemplateModel`.

Toolboxes

Every team gets its own Postmark toolbox.

Curate toolboxes so support, growth and billing each see the tools they need.

  • Support
  • Growth
  • Product
  • Billing
ElaichiToolboxes
Name Source template Tools Created

Support toolbox

Postmark · bounces and delivery stats

Postmark starter 18 Mar 4, 2026

Growth toolbox

Postmark · templated and bulk emails

9 Mar 2, 2026

Product toolbox

Postmark · transactional email sends

24 Feb 27, 2026

Billing toolbox

Postmark · invoice and receipt emails

Postmark starter 6 Feb 19, 2026

Engineering toolbox

Postmark · templates and message streams

31 Jan 30, 2026

Compliance toolbox

Postmark · suppressions and bounce dumps

12 Jan 22, 2026

Shared connections

Teammates send through Postmark without the token.

One person connects the account, the connections table shows who shares it.

  • Support Inbox
  • Growth EMEA
  • Product Transactional
  • Billing Notices
ElaichiConnections
Connection Scope Status Access
PO

Postmark (Support Inbox)

Connected by Emma Laurent

Personal • Active 1 team · 6 members
PO

Postmark (Growth EMEA)

Connected by James Whitfield

Organization • Active 3 teams · 24 members
PO

Postmark (Product Transactional)

Connected by Sofia Ricci

Organization • Active 2 teams · 11 members
PO

Postmark (Billing Notices)

Connected by Daniel Ortega

Personal • Needs re-auth 1 team · 3 members
PO

Postmark (Engineering Staging)

Connected by Clara Nowak

Personal • Active Not shared
PO

Postmark (Lifecycle Campaigns)

Connected by Michael Brennan

Personal • Active 2 teams · 9 members

Audit log

Every Postmark send has a name on it.

An append only log records when, who, what happened, type and resource.

  • When
  • Who
  • What happened
  • Type
ElaichiAudit log
When Who What happened Type

2 minutes ago

Mar 6, 2026, 3:10 PM

E

Emma Laurent

[email protected]

Restriction Created Access

8 minutes ago

Mar 6, 2026, 3:04 PM

J

James Whitfield

[email protected]

Restriction Updated Access

14 minutes ago

Mar 6, 2026, 2:58 PM

S

Sofia Ricci

[email protected]

Role Assigned Access

20 minutes ago

Mar 6, 2026, 2:52 PM

D

Daniel Ortega

[email protected]

Postmark Users Updated MCP

26 minutes ago

Mar 6, 2026, 2:46 PM

C

Clara Nowak

[email protected]

Postmark Emails Created MCP

32 minutes ago

Mar 6, 2026, 2:40 PM

M

Michael Brennan

[email protected]

Postmark Emails List Toolbox

Launching soon

From answering questions to doing the work

A person no longer has to ask. A trigger starts the work, inside the same permissions and the same audit log as everything else. Automations and live dashboards are launching soon, on the Black plan.

Automations

A schedule fires, a digest ships.

Six steps fetch Postmark bounces, group them, draft a digest, then await approval.

Postmark digest

Run 418 · started 2 minutes ago · on behalf of Emma Laurent

  1. Schedule

    Every weekday at 08:00

    0.2s
  2. Fetch emails

    Postmark

    1.4s
  3. Group by owner

    Transform

    0.1s
  4. Draft the digest

    Agent step

    Ran with 4 tools, returned a structured summary

    6.2s
  5. Approve the digest

    Needs approval

    Assigned to Michael Brennan

    Approve
  6. Post the digest

    Postmark

    Queued

Collections and dashboards

Postmark delivery numbers arrive on schedule.

Four metrics, 14 days of emails sent and a breakdown by team.

Postmark health

Refreshed 4 minutes ago · every 15 minutes · from the emails collection

Live

Emails

1,284 ↓ 12%

Bounces

96 ↓ 8%

Needs attention

3 ↑ 2

Updated this week

412 ↑ 9%

Emails created

Last 14 days

By team

Share of activity

Support Inbox 34%

Growth EMEA 27%

Product Transactional 21%

Billing Notices 18%

FAQ

Frequently asked questions

How do I connect Postmark to Claude?

First, connect Postmark in Elaichi by pasting in the API key from your Postmark account. There is no OAuth application to register and no client ID or secret to generate. Then open Claude, go to Customize, then Connectors, then Add, and paste in https://api.elaichi.ai/mcp. Sign in as yourself and Postmark is ready to use in Claude.

Does Postmark work with ChatGPT and Cursor as well as Claude?

Yes. Once Postmark is connected in Elaichi, the same endpoint, https://api.elaichi.ai/mcp, works in Claude, ChatGPT, Cursor, any other MCP client, and the Elaichi Agent. You connect Postmark once and every client picks it up.

What can an AI agent actually do with my Postmark data?

With Postmark connected, an agent can send single, bulk, and templated emails, look up bounces and reactivate an address, read delivery stats, and create, update, validate, or push templates between servers. It can also list your Postmark servers and update their settings. Postmark has a lot of capabilities, so short concrete asks such as "show me yesterday's bounces" work better than long paragraphs.

Does connecting Postmark give the AI access to every server and template?

No. The agent only sees what the Postmark API key you connected can see, so access follows the person who signed in and the servers that key covers. Elaichi can narrow that further, for example to reading bounces and stats without sending mail, but it can never widen it beyond what Postmark itself allows.

Can my team share one Postmark connection?

Yes. One person connects Postmark in Elaichi and shares it with a team, and nobody else ever handles the API key. Each teammate still signs in to Elaichi as themselves, so every email sent or template changed in Postmark is logged against the person who did it.

Can I stop an agent from deleting or changing things in Postmark?

Yes. Restrictions in Elaichi work per action, so you can allow reading bounces and delivery stats while blocking template deletion, server changes, or sending altogether. A blocked action is never shown to Claude, ChatGPT, or Cursor at all, so no prompt can reach it.

What happens to a Postmark connection when someone leaves?

When you offboard someone in Elaichi, their access to Postmark through every client ends at once, and their past actions stay in the audit log. A shared Postmark connection keeps working for everyone else on the team. If you disconnect Postmark in Elaichi, it disappears from Claude, ChatGPT, Cursor, and every other client in one step.

Put Postmark in front of your team

Fourteen days on Gold, no credit card. Connect it once and pick what each team can call.