# SMTP2GO

**Canonical:** https://apis.io/providers/smtp2go/  
**Website:** https://www.smtp2go.com/  
**APIs profiled:** 11

SMTP2GO is a New Zealand-founded email and SMS delivery platform, running since 2006, that sends and tracks transactional and marketing messages over SMTP relay or a JSON REST API from data centres in the United States, the European Union and Australia. The v3 API covers sending standard, MIME, batch and scheduled email, sending and receiving SMS, verifying sender domains and single sender addresses, managing SMTP users, API keys, IP allow lists and IP authentication, templates, webhooks, suppressions, subaccounts, dedicated IPs and the email archive, plus activity search and delivery statistics. It also ships a remote MCP server and a published Agent Skill for AI agents.

## Kin Score — 74.1 / 100 (exemplar)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 74.1).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 73.5 |
| Governance | 40.2 |
| Contract Governance | 40.2 |
| Operational Transparency | 76.3 |
| Developer Ergonomics | 63.1 |
| Commercial Clarity | 92.1 |
| Access Clarity | 92.1 |

Regulatory layer — **Telecommunications**: 41.7 (matched via tags).

## Agent readiness — 52.4 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | verified |
| OpenAPI Examples | partial |
| 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

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

## APIs (11)

- **SMTP2GO Email API** — REST API for sending transactional emails and SMS, managing sender domains, SMTP users, API keys, templates, webhooks, suppressions, and accessing delivery reports and activity ...
- **SMTP2GO Activity API** — Email activity search
- **SMTP2GO API Keys API** — API key management
- **SMTP2GO Domains API** — Sender domain management
- **SMTP2GO SMS API** — Send and receive SMS messages
- **SMTP2GO SMTP Users API** — SMTP user account management
- **SMTP2GO Stats API** — Email delivery statistics and reports
- **SMTP2GO Subaccounts API** — Subaccount management
- **SMTP2GO Suppressions API** — Suppression list management
- **SMTP2GO Templates API** — Email template management
- **SMTP2GO Webhooks API** — Webhook configuration

## MCP servers (1)

- **SMTP2GO remote MCP server**

## Agentic access (1)

- **Smtp2Go Agentic Access** — 52 operations · 52 acting

## Security (2)

- **Smtp2Go Authentication** — apiKey · 2 schemes
- **Smtp2Go Domain Security** — TLSv1.3 · DMARC

## Plans (1)

- **Smtp2Go Plans Pricing**

## Tags

Email, Email Delivery, Transactional Email, SMTP, SMS, Email API, Deliverability, Webhook, Messaging, Communications, MCP, Agent Skills

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/smtp2go/). Scores are computed from the provider's own public artifacts under a published rubric.