Forward Email
Forward Email provides free email forwarding for custom domains with an open-source, privacy‑focused service. It offers API access to manage domains, aliases, messages, calendars, contacts and webhooks, supports SMTP, IMAP, POP3, CalDAV and CardDAV, and includes features like encrypted SQLite mailboxes, DKIM, SPF, DMARC, and detailed analytics. The platform serves over 1.6 million domains, offers unlimited aliases, and provides SDKs and client apps for desktop, mobile and terminal environments.
Solid contracts, transparent operations, and an easy start — typically complete on four or five facets with one clear soft spot.
API Evangelist profiles Forward Email the way a machine reads it — 32 machine-readable artifacts across 1 API, 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 — Forward Email scores 60.1/100 (strong), with a separate agent-readiness read of 33/100 (agent ready). 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 2026-10-31 · rubric v0.25.0
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</a>[](https://providers.apievangelist.com/providers/forward-email/)<!-- Kin Score · API Evangelist -->
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title="Forward Email on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/forward-email/card.svg"
alt="Forward Email 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 Forward Email
Each block below is one kind of artifact we hold for Forward Email. 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 16
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.
Forward Email Account API
Account management endpoints
Forward Email Aliases API
Domain alias management endpoints
Forward Email Calendar Events API
Alias calendar events management endpoints (CalDAV) >[!NOTE] > Unlike other API endpoints, these require [Authentication](#description/authentication) "username" equal to the al...
Forward Email Calendars API
Alias calendars management endpoints (CalDAV) >[!NOTE] > Unlike other API endpoints, these require [Authentication](#description/authentication) "username" equal to the alias us...
Forward Email Contacts API
Alias contacts management endpoints (CardDAV) >[!NOTE] >Unlike other API endpoints, these require Authentication "username" equal to the alias username and "password" equal to t...
Forward Email Domains API
> [!TIP] > Domain endpoints with a domain's name /v1/domains/:domain\_name as their endpoint are interchangeable with a domain's ID :domain\_id. This m...
Forward Email Emails API
Email management endpoints
Forward Email Encrypt API
Encryption endpoints
Forward Email Folders API
Alias folders management endpoints (IMAP/POP3) >[!TIP] > Folder endpoints with a folder's path /v1/folders/:path as their endpoint are interchangeable with a folder...
Forward Email Invites API
Domain invite management endpoints
Forward Email Logs API
Log management endpoints
Forward Email Members API
Domain member management endpoints
Forward Email Messages API
Alias messages management endpoints (IMAP/POP3) >[!NOTE] > Unlike other API endpoints, these require [Authentication](#description/authentication) "username" equal to the alias ...
Forward Email Push Tokens API
Register and manage push notification tokens for APNs, FCM, UnifiedPush, and Web Push. Tokens are scoped to an alias and used to deliver notifications when the app is background...
Forward Email Sieve Scripts API
Sieve script management endpoints >[!NOTE] > Sieve is a powerful email filtering language defined in RFC 5228. Scripts are executed on incoming mail to automatically organize, f...
Forward Email WebSockets API
Real-time push notifications via WebSocket. Connect to the /v1/ws endpoint to receive live events. Authentication is optional: authenticated clients receive per-alias events (IM...
Scroll within the panel for all 16 ·
MCP Servers 1
Model Context Protocol servers expose these APIs directly to AI agents. We profile them because agent-native access is the fastest-growing way this provider's capabilities actually get used.
Model Context Protocol servers that expose these APIs to AI agents.
Forward Email MCP Server
MCP SERVERAgent Skills 1
An agent skill packages the how-to for driving these APIs from an assistant — the prompts, the sequence, the guardrails — so the knowledge to use the API travels with it.
Packaged agent skills for driving this provider's APIs from an AI assistant.
getting-started
AGENT SKILLPricing 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.
Event Specifications 1
Not every API is request/response. AsyncAPI describes the event-driven and streaming side — the webhooks and channels — so the asynchronous half of the interface is documented the same way the synchronous half is.
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Forward Email Webhooks
ASYNCAPISemantic Vocabularies 1
JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.
JSON-LD contexts and semantic vocabularies used across these APIs.
Forward Email Context
JSON-LDSpectral Rules 1
Governance rulesets we run against this provider's specs — the automated checks behind parts of the score. Profiling them makes the quality bar explicit and re-runnable, not a matter of opinion.
Forward Email API Rules
SPECTRALJSON Schema 6
Standalone JSON Schema definitions describe the data models behind the API. We profile them so the shapes are validatable on their own — useful long after a single request is forgotten.
Standalone JSON Schema definitions for this provider's data models.
AliasAccount
JSON SCHEMAAliasInput
JSON SCHEMADomain
JSON SCHEMAMessage
JSON SCHEMASMTP
JSON SCHEMAUpdateDomainInput
JSON SCHEMASecurity Posture 3
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 Forward Email — 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.
Get Started 2
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 5
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 7
Pagination, idempotency, versioning, errors, and events
Scroll within the panel for all 7 ·
Build 3
SDKs, sample code, and the tooling you integrate with
Access & Security 5
Authentication, authorization, and security posture
Operate 2
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
Other 1
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/forward-email · machine-readable index on apis.io
This is an independent, third-party profile of Forward Email, 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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