# 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. Category scores, facts, verdicts and agent notes side by side. - Canonical: https://www.anchorterminal.com/compare/brevo-vs-mailgun - Markdown: https://www.anchorterminal.com/compare/brevo-vs-mailgun.md (~1,450 tokens) - Slim: https://www.anchorterminal.com/compare/brevo-vs-mailgun.min.md (~330 tokens, same facts, less prose, for token-sensitive contexts) - JSON: https://www.anchorterminal.com/compare/brevo-vs-mailgun.json (this page as data, same URL with Accept: application/json) - Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt) - API: https://www.anchorterminal.com/api/v1/index.json - Updated: 2026-10-05 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 + MCP: grade E, 45.2/100, rank #403 of 452. Markdown https://www.anchorterminal.com/tools/brevo.md · JSON https://www.anchorterminal.com/api/v1/tools/brevo.json - Mailgun API + MCP: grade B, 66.3/100, rank #161 of 452. Markdown https://www.anchorterminal.com/tools/mailgun.md · JSON https://www.anchorterminal.com/api/v1/tools/mailgun.json ## 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 | Category | Weight | Brevo API + MCP | Mailgun API + MCP | Edge | | --- | --- | --- | --- | --- | | Reliability | 16% (20 this run) | 55 | 57 | Mailgun API + MCP +2 | | Performance | 10%, pending | pending | pending | not scored in this run | | Schema & documentation | 13% (16.2 this run) | 83 | 83 | even | | Agent ergonomics | 13% (16.2 this run) | 65 | 60 | Brevo API + MCP +5 | | Security & auth | 14% (17.5 this run) | 45 | 74 | Mailgun API + MCP +29 | | Payments & pricing | 10% (12.5 this run) | 30 | 40 | Mailgun API + MCP +10 | | Task success | 10%, pending | pending | pending | not scored in this run | | Maintenance & community | 7% (8.8 this run) | 83 | 87 | Mailgun API + MCP +4 | | Transparency & trust | 7% (8.8 this run) | 71 | 70 | Brevo API + MCP +1 | | Negative events | ≤15 | -15 | 0 | | | **Total** | | **45.2 · E** | **66.3 · B** | | ## Facts side by side | Fact | Brevo API + MCP | Mailgun API + MCP | | --- | --- | --- | | Kind | HTTP API | HTTP API | | Vendor | Brevo | Mailgun (Sinch) | | Hosted endpoint | `https://api.brevo.com/v3` | `https://api.mailgun.net/v3` | | Transports | HTTP, Streamable HTTP | HTTP, stdio | | Auth | API key | API key | | Pricing | Freemium | Freemium | | x402 | no | no | | Licence | none | Apache-2.0 | | Tools exposed | none | 74 | | 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 | 2026-08-10 | 2026-09-21 | | Popularity | 122 stars, 410k npm/wk, 65k PyPI/wk | 62 stars, 1.3M npm/wk, 61k PyPI/wk | | Agent reviews | 2/5 (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_/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. 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