EmailEngine
EmailEngine is a self-hosted email automation platform that provides a unified REST API for accessing email accounts via IMAP, SMTP, the Gmail API, and the Microsoft Graph API. It exposes JSON payloads, real-time webhooks, OAuth2 integration, an IMAP/SMTP proxy, hosted authentication forms, low-code custom integrations, Prometheus monitoring, and bounce detection so developers can build modern email functionality without paying per-account fees.
Limited machine-readable signal and partial portal coverage — documentation a human can read, but little a machine or agent can consume without scraping.
API Evangelist profiles EmailEngine the way a machine reads it — 33 machine-readable artifacts across 13 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — EmailEngine scores 27.1/100 (thin), with a separate agent-readiness read of 22/100 (agent aware). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-09-08 · rubric v0.20.0
Put this on your own site. The badge is drawn live from EmailEngine's current Kin Score — paste it once and it updates itself every time the score is recomputed. It follows your visitor's light or dark setting, and it links back here so anyone who sees it can read the full breakdown.
<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/emailengine/"
title="EmailEngine on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/emailengine.svg"
alt="EmailEngine Kin Score — API readiness rating by API Evangelist" width="150" height="150" loading="lazy">
</a>[](https://providers.apievangelist.com/providers/emailengine/)<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/emailengine/"
title="EmailEngine on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/emailengine/card.svg"
alt="EmailEngine Kin Score — API readiness rating by API Evangelist" width="340" height="120" loading="lazy">
</a>More shapes, themes and sizes → · Score as JSON · How badges work
How we profile EmailEngine
Each block below is one kind of artifact we hold for EmailEngine. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 13
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
EmailEngine Account API
The Account API from EmailEngine — 3 operation(s) for account.
EmailEngine Accounts API
The Accounts API from EmailEngine — 1 operation(s) for accounts.
EmailEngine Autoconfig API
The Autoconfig API from EmailEngine — 1 operation(s) for autoconfig.
EmailEngine Deliverytest API
The Deliverytest API from EmailEngine — 1 operation(s) for deliverytest.
EmailEngine Gateways API
The Gateways API from EmailEngine — 1 operation(s) for gateways.
EmailEngine License API
The License API from EmailEngine — 1 operation(s) for license.
EmailEngine Logs API
The Logs API from EmailEngine — 1 operation(s) for logs.
EmailEngine Oauth2 API
The Oauth2 API from EmailEngine — 1 operation(s) for oauth2.
EmailEngine Outbox API
The Outbox API from EmailEngine — 1 operation(s) for outbox.
EmailEngine Stats API
The Stats API from EmailEngine — 1 operation(s) for stats.
EmailEngine Templates API
The Templates API from EmailEngine — 1 operation(s) for templates.
EmailEngine Tokens API
The Tokens API from EmailEngine — 1 operation(s) for tokens.
EmailEngine Webhookroutes API
The Webhookroutes API from EmailEngine — 1 operation(s) for webhookroutes.
Scroll within the panel for all 13 ·
Open Collections 15
Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
API Collection
OPEN COLLECTIONEmailEngine Account API
OPEN COLLECTIONEmailEngine Account Accounts API
OPEN COLLECTIONEmailEngine Account Autoconfig API
OPEN COLLECTIONEmailEngine Account Deliverytest API
OPEN COLLECTIONEmailEngine Account Gateways API
OPEN COLLECTIONEmailEngine Account License API
OPEN COLLECTIONEmailEngine Account Logs API
OPEN COLLECTIONEmailEngine Account Oauth2 API
OPEN COLLECTIONEmailEngine Account Outbox API
OPEN COLLECTIONEmailEngine Account Stats API
OPEN COLLECTIONEmailEngine Account Templates API
OPEN COLLECTIONEmailEngine Account Tokens API
OPEN COLLECTIONEmailEngine Account Webhookroutes API
OPEN COLLECTIONEmailEngine API
OPEN COLLECTIONScroll within the panel for all 15 ·
Pricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the things the Kin Score reads for access clarity — renamed from commercial clarity in rubric 0.12, because a free statutory interface has access terms and no commercial ones.
Published pricing tiers and plan structures.
Rate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Emailengine Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.
Cost, billing, and metering signals for API financial operations.
Emailengine Finops
FINOPSSecurity Posture 1
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.
Recommended x-agentic-access execution contracts for AI agents.
Resources
Every other property we hold for EmailEngine — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Documentation 3
Reference material describing how the API behaves
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 1
Pagination, idempotency, versioning, errors, and events
Build 2
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Operate 3
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 2
The organization behind the API
← All providers · Data indexed from github.com/api-evangelist/emailengine · machine-readable index on apis.io
This is an independent, third-party profile of EmailEngine, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.