# Email delivery APIs for AI agents (slim)

> 9 email delivery APIs ranked by the Anchor benchmark. Leader Resend API + MCP (BB). APIs that send application and transactional email, and often parse inbound mail by webhook. Compared on price per 1,000 emails, deliverability tooling (SPF, DKIM, DMARC, dedicated IPs), inbound handling, sandbox limits and what an agent needs before its first send.

- Full: https://www.anchorterminal.com/categories/email.md (~5,550 tokens) · this version ~480 tokens · JSON https://www.anchorterminal.com/categories/email.json · canonical https://www.anchorterminal.com/categories/email
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-05

- Tools: 9 · agent-ready (BB+): 2 · accept x402: 0 · JSON: https://www.anchorterminal.com/api/v1/tools.json · by capability: https://www.anchorterminal.com/api/v1/capabilities.json
- Capabilities: email.send, email.inbound, email.templates, email.domains, email.analytics

| # | Tool | Grade | Score | Confidence | x402 | Auth | Where | Slim |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 38 | Resend API + MCP | BB | 75.3 | medium | no | OAuth or key | hosted + local | https://www.anchorterminal.com/tools/resend.min.md |
| 42 | Amazon SES | BB | 75.1 | medium | no | OAuth or key | hosted | https://www.anchorterminal.com/tools/amazon-ses.min.md |
| 158 | Postmark API + MCP | B | 66.7 | medium | no | API key | hosted + local | https://www.anchorterminal.com/tools/postmark.min.md |
| 161 | Mailgun API + MCP | B | 66.3 | medium | no | API key | hosted + local | https://www.anchorterminal.com/tools/mailgun.min.md |
| 202 | Twilio SendGrid | B | 63.6 | medium | no | API key | hosted | https://www.anchorterminal.com/tools/sendgrid.min.md |
| 209 | Loops API + MCP | B | 63.1 | medium | no | OAuth or key | hosted | https://www.anchorterminal.com/tools/loops.min.md |
| 264 | Mailjet API + MCP | C | 59.5 | medium | no | API key | hosted + local | https://www.anchorterminal.com/tools/mailjet.min.md |
| 336 | SMTP2GO API + MCP | D | 53.2 | medium | no | API key | hosted | https://www.anchorterminal.com/tools/smtp2go.min.md |
| 403 | Brevo API + MCP | E | 45.2 | medium | no | API key | hosted | https://www.anchorterminal.com/tools/brevo.min.md |