Postmark Account-level API

postmarkapp.com

Configure and manage the servers, domains, and sender signatures associated with a Postmark account via REST API.

The Postmark Account-level API API uses api key authentication; has freemium pricing; offers a free tier (Free developer plan with 100 emails/month, never expires). Verified 2026-07-08 with per-field source links.

Communication Verified 2026-07-08 medium confidence

Base URL

https://api.postmarkapp.com

postmarkapp.com ↗

Auth

api_key

postmarkapp.com ↗

Free tier

Free developer plan with 100 emails/month, never expires

postmarkapp.com ↗

Pricing model

freemium

postmarkapp.com ↗

Pricing

Free (100 emails/mo); Basic $15/mo, Pro $16.50/mo, Platform $18/mo each starting at 10,000 emails/month with per-1,000 overage rates; custom high-volume pricing via sales

postmarkapp.com ↗

Rate limits

not documented null

no source

OpenAPI spec

not documented null

no source

MCP server

not documented null

no source