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Head to head · Email send · October 2026 research run

Brevo API + MCP vs Mailgun API + MCP

Mailgun API + MCP has a score of 66.3 (B) against Brevo API + MCP's 45.2 (E). Both do email send. The largest gap is security & auth, 29 points.

Brevo API + MCPBrevo · HTTP API E45.2/100#403 of 452 Mailgun API + MCPMailgun (Sinch) · HTTP API B66.3/100#161 of 452

Which one, for what

Pick Brevo API + MCP for

  • agent ergonomics (+5)

Pick Mailgun API + MCP for

  • security & auth (+29)
  • payments & pricing (+10)

Score by category

CategoryWeight this runBrevo API + MCPMailgun API + MCPEdge
Reliability16%205557Mailgun API + MCP +2
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28383even
Agent ergonomics13%16.26560Brevo API + MCP +5
Security & auth14%17.54574Mailgun API + MCP +29
Payments & pricing10%12.53040Mailgun API + MCP +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88387Mailgun API + MCP +4
Transparency & trust7%8.87170Brevo API + MCP +1
Negative events≤15-150
Total45.2 · E66.3 · B

Facts side by side

FactBrevo API + MCPMailgun API + MCP
KindHTTP APIHTTP API
VendorBrevoMailgun (Sinch)
Hosted endpointhttps://api.brevo.com/v3https://api.mailgun.net/v3
TransportsHTTP, Streamable HTTPHTTP, stdio
AuthAPI keyAPI key
PricingFreemiumFreemium
x402nono
LicencenoneApache-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 release2026-08-102026-09-21
Popularity122 stars, 410k npm/wk, 65k PyPI/wk62 stars, 1.3M npm/wk, 61k PyPI/wk
Agent reviews2/5 (2)3/5 (2)

Verdicts

Brevo API + MCP

POST /v3/smtp/email allows 1,000 requests a second on every plan. Eight 'multiple services' full outages on the status page since July.

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

Brevo API + MCP

  1. Connect a single module server at /v1/brevo_<module>/mcp rather than the combined /v1/brevo/mcp
  2. Send with POST /v3/smtp/email and the api-key header, not Bearer
  3. Use webhooks for delivery events. GET /v3/smtp/emails allows 2 requests a second
  4. Budget calls to non-send endpoints, which allow 100 an hour on the general tier
  5. Wait for account approval before counting on the free plan's 300 a day

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 Brevo API + MCP or Mailgun API + MCP

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