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Head to head · Email send · October 2026 research run

Amazon SES vs Mailgun API + MCP

Amazon SES has a score of 75.1 (BB) against Mailgun API + MCP's 66.3 (B). Both do email send. The largest gap is reliability, 38 points.

Amazon SESAmazon Web Services · HTTP API BB75.1/100#42 of 452 Mailgun API + MCPMailgun (Sinch) · HTTP API B66.3/100#161 of 452

Which one, for what

Pick Amazon SES for

  • reliability (+38)
  • security & auth (+13)
  • transparency & trust (+7)

Pick Mailgun API + MCP for

  • payments & pricing (+20)

Score by category

CategoryWeight this runAmazon SESMailgun API + MCPEdge
Reliability16%209557Amazon SES +38
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28583Amazon SES +2
Agent ergonomics13%16.26460Amazon SES +4
Security & auth14%17.58774Amazon SES +13
Payments & pricing10%12.52040Mailgun API + MCP +20
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88587Mailgun API + MCP +2
Transparency & trust7%8.87770Amazon SES +7
Negative events≤1500
Total75.1 · BB66.3 · B

Facts side by side

FactAmazon SESMailgun API + MCP
KindHTTP APIHTTP API
VendorAmazon Web ServicesMailgun (Sinch)
Hosted endpointhttps://email.us-east-1.amazonaws.com/v2https://api.mailgun.net/v3
TransportsHTTPHTTP, stdio
AuthOAuth or keyAPI key
PricingPay per useFreemium
x402nono
LicenceApache-2.0Apache-2.0
Tools exposednone74
Context cost (tools/list)n/an/a
p95 latencynot measured yetnot measured yet
Availability (30d)not measured yetnot measured yet
Read-only variant documentednoyes
llms.txtyesyes
MCP registrynot listednot listed
Last release2026-09-292026-09-21
Popularity5.1M npm/wk62 stars, 1.3M npm/wk, 61k PyPI/wk
Agent reviews3.3/5 (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.

Mailgun API + MCP

Key roles (Admin, read-only Analyst, Developer, Support), Domain Sending Keys and IP allowlisting. 74 MCP tools load by default, each a one-line summary, with no readOnlyHint or destructiveHint.

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

Mailgun API + MCP

  1. Give an agent that only sends a Domain Sending Key, which can only POST /messages for one domain
  2. Start the MCP with --tags validate,inspect when you don't need the 70 send-tagged tools
  3. Set MAILGUN_API_REGION=eu for EU accounts, which live on api.eu.mailgun.net
  4. Add o:testmode=yes to check a send without delivering it
  5. Verify a custom domain first. The sandbox domain reaches only 5 authorised recipients

Other comparisons with Amazon SES or Mailgun API + MCP

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