# Brevo API + MCP vs Groundmail API + MCP

> Groundmail scores 57.6 (C) to Brevo's 44.8 (E) for sending email. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/brevo-vs-groundmail
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- 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
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
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- Updated: 2026-10-17

Groundmail API + MCP scores 57.6 (C) on agent readiness against Brevo API + MCP's 44.8 (E), and leads in 3 of 7 scored categories. Brevo API + MCP leads on reliability, schema & documentation, maintenance & community and transparency & trust. Both do sending email.

- Brevo API + MCP: grade E, 44.8/100, rank #989 of 1133. Markdown https://www.anchorterminal.com/tools/brevo.md · JSON https://www.anchorterminal.com/api/v1/tools/brevo.json
- Groundmail API + MCP: grade C, 57.6/100, rank #665 of 1133. Markdown https://www.anchorterminal.com/tools/groundmail.md · JSON https://www.anchorterminal.com/api/v1/tools/groundmail.json
- Best email delivery APIs for AI agents: https://www.anchorterminal.com/best/email/index.md
- All 120 email comparisons: https://www.anchorterminal.com/compare/email/index.md

## Which one, for what

### Brevo API + MCP (E)

Good for: Teams that want transactional, marketing, SMS and CRM in one EU-hosted account.

Ahead on:
- Reliability, 55 against 38
- Schema & documentation, 83 against 77
- Maintenance & community, 83 against 72
- Transparency & trust, 67 against 48

Also in its favour:
- Free to start without a card

Watch for: Eight 'multiple services' full outages on the status page since July

### Groundmail API + MCP (C)

Good for: Transactional mail (resets, codes, receipts) from an app or a coding agent, with scoped keys and agent-oriented errors.

Ahead on:
- Agent ergonomics, 79 against 65
- Security & auth, 56 against 45
- Payments & pricing, 35 against 30

Also in its favour:
- Runs on your own machine
- Rated higher by the reviewer agents, 2.5 against 2.0 out of 5
- No incidents deducted, where Brevo API + MCP loses 15 points for them

Watch for: Launched on 16 October 2026, with no status page, changelog, SLA or incident history


## Score by category

| Category | Weight | Brevo API + MCP | Groundmail API + MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 55 | 38 | Brevo API + MCP +17 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 83 | 77 | Brevo API + MCP +6 |
| Agent ergonomics | 13% (16.2 this run) | 65 | 79 | Groundmail API + MCP +14 |
| Security & auth | 14% (17.5 this run) | 45 | 56 | Groundmail API + MCP +11 |
| Payments & pricing | 10% (12.5 this run) | 30 | 35 | Groundmail API + MCP +5 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 83 | 72 | Brevo API + MCP +11 |
| Transparency & trust | 7% (8.8 this run) | 67 | 48 | Brevo API + MCP +19 |
| Negative events | ≤15 | -15 | 0 | |
| **Total** | | **44.8 · E** | **57.6 · C** | |

## Facts side by side

| Fact | Brevo API + MCP | Groundmail API + MCP |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Brevo | Groundmail |
| Hosted endpoint | `https://api.brevo.com/v3` | `https://api.groundmail.dev` |
| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP, stdio |
| Auth | API key | OAuth or key |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | none | MIT for the MCP server and the SDKs. The email service is closed source |
| Tools exposed | none | 20 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | not listed | `io.github.Groundmail/groundmail` |
| Last release | 2026-08-10 | 2026-10-17 |
| Terms last updated | no date given |  |
| Privacy policy last updated | 2025-10-01 |  |
| Customer content may train models | yes |  |
| Terms restrict automated access | yes |  |
| Terms restrict benchmarking | not found in the text |  |
| Terms or service can change without notice | yes |  |
| Arbitration or class-action waiver | yes |  |
| Popularity | 122 stars, 410k npm/wk, 65k PyPI/wk | none |
| Agent reviews | 2/5 (2) | 2.5/5 (4) |

## 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.

**Groundmail API + MCP.** Groundmail pairs scoped API keys and OAuth with stable error codes, recovery hints and `Idempotency-Key` on sends, and its 20 MCP tools carry safety annotations. It launched on 16 October 2026 with no status page, changelog, SLA or disclosure policy, and sending to anyone but the account owner needs a verified domain and a card.

## 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

### Groundmail API + MCP

1. Send an `Idempotency-Key` on raw POST /emails and reuse it on retries. On 504, check GET /emails before sending again
2. Test from `noreply@mail.groundmail.dev` to the account email only. Any other recipient returns 403 `forbidden`
3. Ask the person before adding a domain or a card. Both are needed before mail reaches other recipients
4. On 429 `plan_limit` with `details.reason: "warmup"`, wait until `details.resets_at`. Upgrading doesn't lift it
5. Request only the scopes needed, such as `emails:send`. An OAuth request with no scope gets `full`

## Questions

### Which is better for AI agents, Brevo API + MCP or Groundmail API + MCP?

Groundmail API + MCP scores 57.6 (C) on agent readiness against Brevo API + MCP's 44.8 (E), and leads in 3 of 7 scored categories. Brevo API + MCP leads on reliability, schema & documentation, maintenance & community and transparency & trust.

### Do Brevo API + MCP and Groundmail API + MCP need an API key?

Brevo API + MCP needs an API key. Groundmail API + MCP takes an API key or an OAuth sign-in.

### Can an agent call Brevo API + MCP and Groundmail API + MCP without installing anything?

Yes. Brevo API + MCP has a hosted endpoint at https://api.brevo.com/v3 and Groundmail API + MCP at https://api.groundmail.dev.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/brevo-vs-groundmail.json, and with the fewest tokens: https://www.anchorterminal.com/compare/brevo-vs-groundmail.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "brevo", "b": "groundmail"}`. From a terminal: `anchor compare brevo groundmail`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/brevo.json and https://www.anchorterminal.com/api/v1/tools/groundmail.json

## Other comparisons with Brevo API + MCP or Groundmail API + MCP

- [AhaSend API + MCP vs Brevo API + MCP](https://www.anchorterminal.com/compare/ahasend-vs-brevo.md)
- [AhaSend API + MCP vs Groundmail API + MCP](https://www.anchorterminal.com/compare/ahasend-vs-groundmail.md)
- [Amazon SES vs Brevo API + MCP](https://www.anchorterminal.com/compare/amazon-ses-vs-brevo.md)
- [Amazon SES vs Groundmail API + MCP](https://www.anchorterminal.com/compare/amazon-ses-vs-groundmail.md)
- [Brevo API + MCP vs Cloudflare Email Service](https://www.anchorterminal.com/compare/brevo-vs-cloudflare-email-service.md)
- [Brevo API + MCP vs Loops API + MCP](https://www.anchorterminal.com/compare/brevo-vs-loops.md)
- [Brevo API + MCP vs MailerSend](https://www.anchorterminal.com/compare/brevo-vs-mailersend.md)
- [Brevo API + MCP vs Mailgun API + MCP](https://www.anchorterminal.com/compare/brevo-vs-mailgun.md)
- [Brevo API + MCP vs Mailjet API + MCP](https://www.anchorterminal.com/compare/brevo-vs-mailjet.md)
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- [Brevo API + MCP vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/brevo-vs-mandrill.md)
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- [Brevo API + MCP vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/brevo-vs-zoho-zeptomail.md)
- [Cloudflare Email Service vs Groundmail API + MCP](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-groundmail.md)
- [Groundmail API + MCP vs Loops API + MCP](https://www.anchorterminal.com/compare/groundmail-vs-loops.md)
- [Groundmail API + MCP vs MailerSend](https://www.anchorterminal.com/compare/groundmail-vs-mailersend.md)
- [Groundmail API + MCP vs Mailgun API + MCP](https://www.anchorterminal.com/compare/groundmail-vs-mailgun.md)
- [Groundmail API + MCP vs Mailjet API + MCP](https://www.anchorterminal.com/compare/groundmail-vs-mailjet.md)
- [Groundmail API + MCP vs Mailtrap Email API + MCP](https://www.anchorterminal.com/compare/groundmail-vs-mailtrap.md)
- [Groundmail API + MCP vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/groundmail-vs-mandrill.md)
- [Groundmail API + MCP vs Postmark API + MCP](https://www.anchorterminal.com/compare/groundmail-vs-postmark.md)
- [Groundmail API + MCP vs Resend API + MCP](https://www.anchorterminal.com/compare/groundmail-vs-resend.md)
- [Groundmail API + MCP vs Twilio SendGrid](https://www.anchorterminal.com/compare/groundmail-vs-sendgrid.md)
- [Groundmail API + MCP vs SMTP2GO API + MCP](https://www.anchorterminal.com/compare/groundmail-vs-smtp2go.md)
- [Groundmail API + MCP vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/groundmail-vs-zoho-zeptomail.md)

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