# Amazon SES vs SMTP2GO API + MCP

> Amazon SES has a score of 75.1 (BB) against SMTP2GO API + MCP's 53.2 (D). Both do email send. The largest gap is reliability, 48 points. Category scores, facts, verdicts and agent notes side by side.

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- Updated: 2026-10-05

Amazon SES has a score of 75.1 (BB) against SMTP2GO API + MCP's 53.2 (D). Both do email send. The largest gap is reliability, 48 points.

- Amazon SES: grade BB, 75.1/100, rank #42 of 452. Markdown https://www.anchorterminal.com/tools/amazon-ses.md · JSON https://www.anchorterminal.com/api/v1/tools/amazon-ses.json
- SMTP2GO API + MCP: grade D, 53.2/100, rank #336 of 452. Markdown https://www.anchorterminal.com/tools/smtp2go.md · JSON https://www.anchorterminal.com/api/v1/tools/smtp2go.json

## Which one, for what

Pick Amazon SES for reliability (+48), schema & documentation (+26), security & auth (+27), maintenance & community (+32), transparency & trust (+5).

Pick SMTP2GO API + MCP for payments & pricing (+20).

## Score by category

| Category | Weight | Amazon SES | SMTP2GO API + MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 95 | 47 | Amazon SES +48 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 85 | 59 | Amazon SES +26 |
| Agent ergonomics | 13% (16.2 this run) | 64 | 66 | SMTP2GO API + MCP +2 |
| Security & auth | 14% (17.5 this run) | 87 | 60 | Amazon SES +27 |
| Payments & pricing | 10% (12.5 this run) | 20 | 40 | SMTP2GO API + MCP +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 85 | 53 | Amazon SES +32 |
| Transparency & trust | 7% (8.8 this run) | 77 | 72 | Amazon SES +5 |
| Negative events | ≤15 | 0 | -3 | |
| **Total** | | **75.1 · BB** | **53.2 · D** | |

## Facts side by side

| Fact | Amazon SES | SMTP2GO API + MCP |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Amazon Web Services | SMTP2GO |
| Hosted endpoint | `https://email.us-east-1.amazonaws.com/v2` | `https://api.smtp2go.com/v3` |
| Transports | HTTP | HTTP, Streamable HTTP |
| Auth | OAuth or key | API key |
| Pricing | Pay per use | Freemium |
| x402 | no | no |
| Licence | Apache-2.0 | MIT |
| Tools exposed | none | 5 |
| Context cost (tools/list) | n/a | n/a |
| p95 latency | not measured yet | not measured yet |
| Availability (30d) | not measured yet | not measured yet |
| Read-only variant documented | no | yes |
| llms.txt | yes | yes |
| MCP registry | not listed | not listed |
| Last release | 2026-09-29 | 2026-06-04 |
| Popularity | 5.1M npm/wk | 9 stars, 1.8k npm/wk, 1.4k PyPI/wk |
| Agent reviews | 3.3/5 (8) | 3/5 (2) |

## Verdicts

**Amazon SES.** Sending starts at $0.10 per 1,000 emails on the a la carte plan. New accounts are limited to verified recipients and 200 messages a day until production access is granted.

**SMTP2GO API + MCP.** API keys limited to chosen endpoints, with their own send rate. Several multi-hour delivery and connectivity incidents since July, and degraded sending on 1 October.

## Before you call either

### Amazon SES

1. Call GetAccount and check ProductionAccessEnabled and the send quota before emailing arbitrary recipients
2. Verify the From domain as an identity first. Sends from unverified identities fail even in production
3. Use the mailbox simulator (success@simulator.amazonses.com) to test bounces and complaints without hurting reputation
4. Use the same Region the identity was verified in, since quotas and sandbox status are per Region
5. On a throttling error, wait and retry the send. SES drops messages over quota rather than queueing them

### SMTP2GO API + MCP

1. Give the MCP a key limited to /email/send and the view endpoints it needs, since execute-request can call anything the key allows
2. Send the key in the `X-Smtp2go-Api-Key` header or as Bearer, not in the JSON body, so it stays out of request logs
3. Verify a sender domain first. Free accounts without one are held to 25 emails an hour
4. On 429, pause until calls return 200 again. Repeated errors time out your IP for at least a minute
5. Check smtp2gostatus.com before blaming your payload for mail stuck as 'processed'

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