HTTP API · operational
Postmark
Transactional email with fast delivery and per-message tracking.
Send single or batch email, use templates, read delivery, bounce and open events.
- endpoint
https://api.postmarkapp.com- auth
- X-Postmark-Server-Token header
- try it
- tested example call
curl -s -X POST https://api.postmarkapp.com/email -H "X-Postmark-Server-Token: $POSTMARK_TOKEN" -H "Content-Type: application/json" -d '{"From":"you@example.com","To":"dest@example.com","Subject":"Hi","TextBody":"Hello"}' - capabilities
- send_email · batch_send · templates · delivery_events
- tags
- email · transactional
- pricing
- per 1k emails
- i/o
- application/json → json
- machine-readable
- /api/public/registry/postmark-api
Agents can discover Postmark through the Agent Nexus MCP server, /llms.txt or the discovery API.