{"id":"postmark-api","name":"Postmark API","homepage":"https://postmarkapp.com","repo_url":"https://github.com/wildbit/postmark-python","category":"communication","subcategories":["email","transactional-email"],"tags":["postmark","email","transactional","deliverability","rest-api","sdk","activecamp"],"what_it_does":"High-deliverability transactional email API focused on fast inbox delivery for password resets, receipts, and critical notifications.","use_cases":["Sending time-critical transactional emails (password resets, OTPs)","Receipt and confirmation email delivery from agent workflows","Monitoring email delivery and bounce handling","Template-based email with dynamic content","Inbound email processing via webhooks"],"not_for":["Marketing or bulk email campaigns (they explicitly block this)","High-volume sending at low cost","Teams needing a large free tier"],"best_when":"An agent needs to send critical transactional emails with the highest possible deliverability guarantees.","avoid_when":"You need to send any marketing content or need a cheap bulk sender.","alternatives":["sendgrid-api","mailgun-api","resend-api"],"af_score":69.8,"security_score":85.0,"reliability_score":null,"package_type":"mcp_server","discovery_source":["github"],"priority":"low","status":"evaluated","version_evaluated":"current","last_evaluated":"2026-03-01T09:50:06.093456+00:00","performance":{"latency_p50_ms":100,"latency_p99_ms":300,"uptime_sla_percent":99.99,"rate_limits":"Varies by plan, typically burst to 500/sec","data_source":"llm_estimated","measured_on":null}}