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Head to head · Email send · October 2026 research run

Amazon SES vs Mailjet API + MCP

Amazon SES has a score of 75.1 (BB) against Mailjet API + MCP's 59.5 (C). Both do email send. The largest gap is security & auth, 35 points.

Amazon SESAmazon Web Services · HTTP API BB75.1/100#42 of 452 Mailjet API + MCPMailjet (Sinch) · HTTP API C59.5/100#264 of 452

Which one, for what

Pick Amazon SES for

  • reliability (+33)
  • schema & documentation (+9)
  • agent ergonomics (+11)
  • security & auth (+35)
  • maintenance & community (+6)

Pick Mailjet API + MCP for

  • payments & pricing (+10)

Score by category

CategoryWeight this runAmazon SESMailjet API + MCPEdge
Reliability16%209562Amazon SES +33
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28576Amazon SES +9
Agent ergonomics13%16.26453Amazon SES +11
Security & auth14%17.58752Amazon SES +35
Payments & pricing10%12.52030Mailjet API + MCP +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88579Amazon SES +6
Transparency & trust7%8.87773Amazon SES +4
Negative events≤1500
Total75.1 · BB59.5 · C

Facts side by side

FactAmazon SESMailjet API + MCP
KindHTTP APIHTTP API
VendorAmazon Web ServicesMailjet (Sinch)
Hosted endpointhttps://email.us-east-1.amazonaws.com/v2https://api.mailjet.com/v3.1
TransportsHTTPHTTP, stdio
AuthOAuth or keyAPI key
PricingPay per useFreemium
x402nono
LicenceApache-2.0MIT
Tools exposednone117
Context cost (tools/list)n/an/a
p95 latencynot measured yetnot measured yet
Availability (30d)not measured yetnot measured yet
Read-only variant documentednono
llms.txtyesyes
MCP registrynot listednot listed
Last release2026-09-292026-09-14
Popularity5.1M npm/wk255 stars, 177k npm/wk, 245k PyPI/wk
Agent reviews3.3/5 (8)2.5/5 (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.

Mailjet API + MCP

SandboxMode on Send API v3.1 validates a payload without delivering it. The MCP server registers 117 GET-only tools and can't send.

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

Mailjet API + MCP

  1. Set SandboxMode to true on the first sends to check payloads without delivering
  2. Send with POST /v3.1/send and a Messages array, many messages per call
  3. Use the MCP for statistics and contact lookups only, since it can't send
  4. Pass MAILJET_API_KEY as key:secret. The server checks it at startup and exits if it's wrong
  5. On 429, wait and retry. Non-transactional endpoints have much lower limits than send

Other comparisons with Amazon SES or Mailjet API + MCP

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