# MailerSend

**Canonical:** https://apis.io/providers/mailersend/  
**Website:** https://www.mailersend.com/  
**APIs profiled:** 8

MailerSend is a transactional email and SMS platform built for developers. Its v1 REST API covers email sending (single, bulk to 500 objects per request, and scheduled up to 72 hours out), SMTP relay, templates, sending domains and DNS verification, sender identities, recipients and five suppression lists, inbound routing, activity and analytics, email verification, DMARC and blocklist monitoring, SMS, and account/token administration. Authentication is a domain-scoped bearer token drawn from a 30-value scope vocabulary. MailerSend ships six official SDKs, an official Laravel driver, a Go CLI with an interactive TUI, a remote OAuth-protected MCP server exposing 127 tools, and its own published Agent Skill — but no machine-readable API contract and no idempotency guarantee.

## Kin Score — 65.0 / 100 (strong)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 65.0).

| Facet | Score |
|---|---|
| Discoverability | 92.6 |
| Contract Quality | 61.5 |
| Governance | 16.7 |
| Contract Governance | 16.7 |
| Operational Transparency | 57.9 |
| Developer Ergonomics | 76.2 |
| Commercial Clarity | 60.5 |
| Access Clarity | 60.5 |

Regulatory layer — **Telecommunications**: 52.8 (matched via tags).

## Agent readiness — 46.0 (agent-ready)

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

## Access

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

## APIs (8)

- **MailerSend API** — MailerSend API v1 provides RESTful endpoints for sending emails (single, bulk, scheduled), templates, domains, recipients, suppression lists, webhooks, analytics, SMS, and inbou...
- **MailerSend Bulk Email API** — The Bulk Email API from MailerSend — 2 operation(s) for bulk email.
- **MailerSend Domains API** — The Domains API from MailerSend — 2 operation(s) for domains.
- **MailerSend Email API** — The Email API from MailerSend — 1 operation(s) for email.
- **MailerSend Messages API** — The Messages API from MailerSend — 2 operation(s) for messages.
- **MailerSend Sender Identities API** — The Sender Identities API from MailerSend — 1 operation(s) for sender identities.
- **MailerSend Templates API** — The Templates API from MailerSend — 2 operation(s) for templates.
- **MailerSend Webhooks API** — The Webhooks API from MailerSend — 2 operation(s) for webhooks.

## MCP servers (1)

- **MailerSend MCP Server**

## Agentic access (1)

- **Mailersend Agentic Access** — 16 operations · 7 acting

## Security (2)

- **Mailersend Authentication** — http/oauth2 · 3 schemes
- **Mailersend Domain Security** — TLSv1.3 · DMARC

## Plans (1)

- **Mailersend Plans Pricing**

## Tags

Email, Transactional Email, SMTP, Marketing, Communications, SMS, Messaging, Templates, Webhook, Email Verification, Deliverability, Analytics, MCP

---

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