# MailPace

**Canonical:** https://apis.io/providers/mailpace/  
**Website:** https://mailpace.com  
**APIs profiled:** 4

MailPace is a fast, privacy-focused transactional email API for developers. It delivers application email - password resets, receipts, notifications - over a simple HTTPS REST API and SMTP, with DKIM-verified sending domains, Ed25519-signed webhooks, and EU-based hosting.

## Kin Score — 35.6 / 100 (thin)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 35.6).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 54.9 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 34.2 |
| Developer Ergonomics | 21.4 |
| Commercial Clarity | 28.9 |
| Access Clarity | 28.9 |

## Agent readiness — 25.5 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | verified |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Free · Self-serve signup — onboarding: self-serve, pricing: free, trial: no (confidence: high).

## APIs (4)

- **MailPace Webhooks API** — Delivers outbound, Ed25519-signed event callbacks (email.queued, email.delivered, email.deferred, email.bounced, email.spam) to your endpoints. Configured per domain in the Mail...
- **MailPace API Tokens API** — Manage per-domain API tokens.
- **MailPace Domains API** — Manage sending domains and DKIM verification.
- **MailPace Send API** — Send transactional email.

## Agentic access (1)

- **Mailpace Agentic Access** — 11 operations · 7 acting · 1 human-in-the-loop

## Security (2)

- **Mailpace Authentication** — apiKey · 2 schemes
- **Mailpace Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Mailpace Plans Pricing**

## Tags

Email, Transactional Email, Messaging, SMTP, Privacy

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/mailpace/). Scores are computed from the provider's own public artifacts under a published rubric.