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Postmark

Prefer guided AI setup?

Instead of following these steps manually, you can use the AI Credential Assistant — describe what you want to connect and the AI will walk you through the setup step by step, tailored to your account.

Overview​

Connect your Postmark account to Nirvai to send transactional emails, manage email templates, and track email delivery.

Supported Authentication Methods​

  • API Token - Server-specific API token

Prerequisites​

  • A Postmark account
  • A Postmark server (created automatically with account)

Setup Instructions​

API Token Authentication​

Step 1: Get Your Server API Token​

  1. Log in to your Postmark account
  2. Select your Server (or create one)
  3. Go to the API Tokens tab
  4. Copy the Server API Token

Step 2: Configure in Nirvai​

  1. In Nirvai, select Postmark API
  2. Paste your Server API Token
  3. Save the credential

Token Types​

Token TypePurposeAccess Level
Server API TokenSend emails, manage templatesSingle server
Account API TokenManage servers, domainsFull account

Use Server API Token for sending emails (most common use case).

Available Operations​

With Postmark credentials, you can:

  • Send transactional emails
  • Use email templates
  • Track email delivery
  • Manage webhooks
  • Access bounce data
  • View server statistics

Best Practices​

Server Organization​

  • Create separate servers for different environments (production, staging)
  • Use meaningful server names
  • Each server has its own API token

Deliverability​

  • Verify your sending domain
  • Set up DKIM signing
  • Monitor bounce rates

Troubleshooting​

Common Issues​

  • 401 Unauthorized: Server API Token is invalid
  • 422 Unprocessable: Email validation failed (check addresses, content)
  • Inactive Recipient: Address is on suppression list
  • Not Allowed to Send: Verify your sender signature first

Who Can Access Tokens​

  • Account Owners: Full access
  • Account Admins: Full access
  • Server Admins: Access to their server's token only

Adapted from n8n documentation for Nirvai platform

Next Steps​

Got your credential? Connect it to an agent

Use the AI Tool Creator to turn this credential into agent-callable tools. Describe what your agent should be able to do and the AI investigates the API, configures the endpoints, and gives you a reviewable toolkit before saving anything.