# EmailOctopus

**Canonical:** https://apis.io/providers/emailoctopus/  
**Website:** https://emailoctopus.com  
**APIs profiled:** 6

EmailOctopus is an affordable email-marketing platform for newsletters, campaigns, automations and audience management, built on a low-cost sending model that undercuts the incumbent ESPs. Its v2 REST API is served from a single host, https://api.emailoctopus.com, with no version segment in the path, and is authenticated with a Bearer API key. The API covers subscriber lists, contacts, per-list custom fields and tags, campaigns and three campaign report projections, plus an operation to enqueue a contact into an automation. EmailOctopus publishes a real OpenAPI 3.1.0 document (25 operations, 19 schemas) at its v2 reference URL, documents an RFC 7807 error envelope with dereferenceable type URIs, cursor pagination, a token-bucket rate limit of 10 requests per second with a burst of 100, and an HMAC-SHA256-signed webhook surface carrying eight contact event types. It ships no official client SDK, no CLI and no MCP server.

## Kin Score — 61.7 / 100 (strong)

Scored 2026-08-21 under rubric 0.12.0. Trend: flat (+0.0 from 61.7).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 67.5 |
| Governance | 16.7 |
| Contract Governance | 16.7 |
| Operational Transparency | 55.3 |
| Developer Ergonomics | 49.4 |
| Commercial Clarity | 84.2 |
| Access Clarity | 84.2 |

Regulatory layer — **Telecommunications**: 34.7 (matched via tags).

## Agent readiness — 44.7 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | verified |
| Rate Limit Signal | documented |
| Event Surface Described | yes |
| Agent Skills | derived |
| 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 (6)

- **EmailOctopus Automation API** — Enqueue an existing contact into an EmailOctopus automation. Write-only — the v2 API exposes no operation to list or read automations, so the automation id must come from the da...
- **EmailOctopus Campaign API** — Read campaigns and their three report projections — summary counters, per-link clicks, and per-contact engagement rows. Read-only: campaigns cannot be created, scheduled or sent...
- **EmailOctopus Contact API** — Manage subscribers on a list: create, read, update, delete, upsert by email address, and update many at once through the batch endpoint. The upsert (PUT /lists/{list_id}/contact...
- **EmailOctopus Field API** — Define the per-list custom fields contact records are written against. Fields are keyed by a stable tag slug and typed text, number or date, with optional choices and a fallback...
- **EmailOctopus List API** — Create and manage subscriber lists, the aggregate root of the EmailOctopus data model. Fields, tags and contacts are all owned by a list and addressed through list-scoped paths....
- **EmailOctopus Tag API** — Create, rename, delete and list the tags used to segment contacts on a list. Tags are keyed by slug rather than an id. 4 operation(s) in the EmailOctopus v2 OpenAPI 3.1.0.

## Agentic access (1)

- **Emailoctopus Agentic Access** — 25 operations · 15 acting

## Security (2)

- **Emailoctopus Authentication** — http · 1 scheme
- **Emailoctopus Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Emailoctopus Plans Pricing**

## Tags

Email, Email Marketing, Newsletters, Campaigns, Automation, Contacts, List, Marketing, Webhook, Transactional Email, Subscriber Management, Reporting

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