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.

Forward Email publishes 16 API contracts indexed on the APIs.io network, including Account API, Aliases API, Calendar Events API, and 13 more. Tagged areas include Email Forwarding, Email Hosting, Open Source, API, and Secure Email.

The Forward Email catalog on APIs.io includes 1 event-driven AsyncAPI specification, 1 JSON-LD context, and 1 Spectral governance ruleset.

Forward Email’s developer surface includes support, documentation, engineering blog, getting-started guide, API reference, authentication, and 27 more developer resources.

60.1/100 strong Agent 33/100 agent ready Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →
1 published contract 1 MCP Servers 1 Agent Skills
Email ForwardingEmail HostingOpen SourceAPISecure Email

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0
Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.
The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
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Agent readiness — checks not met, largest first (exact, from this profile):
  • Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
  • A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
  • Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
  • Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
  • Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
  • Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too
4 more unmet checks in the Agent Readiness table above.
Kin Score — facets with the most composite points still available (weight × headroom):
Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/forward-email/apis.yml: open an issue on github.com/api-evangelist/forward-email to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 16

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 means you can refer to t

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's ID :id.

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 for all 16

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Agent Skills 1

Packaged agent skills for driving this provider's APIs from an AI assistant.

getting-started

AGENT SKILL

Pricing Plans 1

Published pricing tiers and plan structures.

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Forward Email Context

37 classes · 216 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Forward Email API Rules

16 rules · 9 errors 6 warnings 1 info

SPECTRAL

JSON Schema 6

Standalone JSON Schema definitions for this provider's data models.

AliasAccount

18 properties

JSON SCHEMA

AliasInput

21 properties

JSON SCHEMA

Domain

53 properties

JSON SCHEMA

Message

32 properties

JSON SCHEMA

SMTP

26 properties

JSON SCHEMA

UpdateDomainInput

20 properties

JSON SCHEMA

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Forward Email Authentication

http · 1 scheme

SECURITY

Forward Email Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Forward Email Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Forward Email Agentic Access

76 operations · 47 acting · 1 human-in-the-loop

76 operations · 47 acting

AGENTIC

Resources

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 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

Source (apis.yml)

apis.yml Raw ↑
aid: forward-email
name: Forward Email
image: https://forwardemail.net/en/index.png?v=1793035193245
description: 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.
url: https://raw.githubusercontent.com/api-evangelist/forward-email/refs/heads/main/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-26 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-26'
modified: '2026-10-26'
tags:
- Email Forwarding
- Email Hosting
- Open Source
- API
- Secure Email
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/forward-email-agentic-access.yml
- type: Plans
  url: plans/forward-email-plans-pricing.yml
- type: Spectral
  url: rules/forward-email-rules.yml
- type: JSONLD
  url: json-ld/forward-email-context.jsonld
- type: Vocabulary
  url: vocabulary/forward-email-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Webhooks
  url: asyncapi/forward-email-webhooks.yml
- type: DataModel
  url: data-model/forward-email-data-model.yml
- type: ErrorCatalog
  url: errors/forward-email-problem-types.yml
- type: Conformance
  url: conformance/forward-email-conformance.yml
- type: LLMsTxt
  url: llms/forward-email-llms.txt
- type: MCPServer
  url: mcp/forward-email-mcp.yml
- type: SecurityTxt
  url: well-known/forward-email-security.txt
- type: WellKnown
  url: well-known/forward-email-well-known.yml
- type: Hosts
  url: hosts/forward-email-hosts.yml
- type: SDKs
  url: packages/forward-email-packages.yml
- type: Packages
  url: packages/forward-email-packages.yml
- type: TermsOfService
  url: https://forwardemail.net/en/terms
- type: Support
  url: https://forwardemail.net/en/help
- type: StatusPage
  url: https://status.forwardemail.net/
- type: Security
  url: https://forwardemail.net/en/security
- type: PrivacyPolicy
  url: https://forwardemail.net/privacy
- type: Newsroom
  url: https://forwardemail.net/en/press
- type: Login
  url: https://forwardemail.net/en/login
- type: GitHubOrganization
  url: https://github.com/isaacs
- type: Documentation
  url: https://forwardemail.net/en/guides
- type: Blog
  url: https://forwardemail.net/blog/feed/atom
- type: GettingStarted
  url: https://forwardemail.net/en/faq#how-do-i-get-started-and-set-up-email-forwarding
- type: APIReference
  url: https://forwardemail.net/en/email-api
- type: Authentication
  url: authentication/forward-email-authentication.yml
- type: VulnerabilityDisclosure
  url: security/forward-email-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/forward-email-domain-security.yml
- type: Website
  url: https://forwardemail.net/
apis:
- aid: forward-email:forward-email-account-api
  name: Forward Email Account API
  description: Account management endpoints
  humanURL: https://forwardemail.net/
  baseURL: https://api.forwardemail.net
  tags:
  - Account
  properties:
  - type: OpenAPI
    url: openapi/forward-email-account-api-openapi.yml
  - type: JSONSchema
    url: json-schema/forward-email-domain-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-update-domain-input-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-message-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-smtp-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-account-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-input-schema.json
- aid: forward-email:forward-email-aliases-api
  name: Forward Email Aliases API
  description: Domain alias management endpoints
  humanURL: https://forwardemail.net/
  baseURL: https://api.forwardemail.net
  tags:
  - Aliases
  properties:
  - type: OpenAPI
    url: openapi/forward-email-aliases-api-openapi.yml
  - type: JSONSchema
    url: json-schema/forward-email-domain-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-update-domain-input-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-message-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-smtp-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-account-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-input-schema.json
- aid: forward-email:forward-email-calendar-events-api
  name: Forward Email Calendar Events API
  description: 'Alias calendar events management endpoints (CalDAV)


    >[!NOTE]

    > Unlike other API endpoints, these require [Authentication](#description/authentication) "username" equal to the alias
    username and "password" equal to the alias generated password as Basic Authorization headers.


    >[!TIP]

    > These endpoints provide comprehensive calendar event management with full iCalendar (RFC 5545) support. Events are stored
    as iCal data and automatically parsed to extract common properties like summary, description, location, and dates for
    easy access. Events support soft deletion and can be filtered by calendar, date range, and deletion status.'
  humanURL: https://forwardemail.net/
  baseURL: https://api.forwardemail.net
  tags:
  - Calendar Events
  properties:
  - type: OpenAPI
    url: openapi/forward-email-calendar-events-api-openapi.yml
  - type: JSONSchema
    url: json-schema/forward-email-domain-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-update-domain-input-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-message-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-smtp-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-account-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-input-schema.json
- aid: forward-email:forward-email-calendars-api
  name: Forward Email Calendars API
  description: 'Alias calendars management endpoints (CalDAV)


    >[!NOTE]

    > Unlike other API endpoints, these require [Authentication](#description/authentication) "username" equal to the alias
    username and "password" equal to the alias generated password as Basic Authorization headers.


    >[!TIP]

    > These endpoints provide complete calendar management with timezone and color support, including creation, retrieval,
    updating, and deletion of calendars. Calendar names are required, while other properties like color, timezone, and description
    are optional.'
  humanURL: https://forwardemail.net/
  baseURL: https://api.forwardemail.net
  tags:
  - Calendars
  properties:
  - type: OpenAPI
    url: openapi/forward-email-calendars-api-openapi.yml
  - type: JSONSchema
    url: json-schema/forward-email-domain-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-update-domain-input-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-message-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-smtp-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-account-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-input-schema.json
- aid: forward-email:forward-email-contacts-api
  name: Forward Email Contacts API
  description: 'Alias contacts management endpoints (CardDAV)


    >[!NOTE]

    >Unlike other API endpoints, these require Authentication "username" equal to the alias username and "password" equal
    to the alias generated password as Basic Authorization headers.


    >[!TIP]

    >These endpoints provide full CRUD operations for contact management with vCard support, including creation, retrieval,
    updating, and deletion of contacts. You can provide either vCard content directly or individual contact fields that will
    be converted to vCard format.'
  humanURL: https://forwardemail.net/
  baseURL: https://api.forwardemail.net
  tags:
  - Contacts
  properties:
  - type: OpenAPI
    url: openapi/forward-email-contacts-api-openapi.yml
  - type: JSONSchema
    url: json-schema/forward-email-domain-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-update-domain-input-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-message-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-smtp-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-account-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-input-schema.json
- aid: forward-email:forward-email-domains-api
  name: Forward Email Domains API
  description: '> [!TIP]

    > Domain endpoints with a domain''s name <code>/v1/domains/:domain\_name</code> as their endpoint are interchangeable
    with a domain''s ID <code>:domain\_id</code>. This means you can refer to the domain by either its <code>name</code> or
    <code>id</code> value.'
  humanURL: https://forwardemail.net/
  baseURL: https://api.forwardemail.net
  tags:
  - Domains
  properties:
  - type: OpenAPI
    url: openapi/forward-email-domains-api-openapi.yml
  - type: JSONSchema
    url: json-schema/forward-email-domain-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-update-domain-input-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-message-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-smtp-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-account-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-input-schema.json
- aid: forward-email:forward-email-emails-api
  name: Forward Email Emails API
  description: Email management endpoints
  humanURL: https://forwardemail.net/
  baseURL: https://api.forwardemail.net
  tags:
  - Emails
  properties:
  - type: OpenAPI
    url: openapi/forward-email-emails-api-openapi.yml
  - type: JSONSchema
    url: json-schema/forward-email-domain-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-update-domain-input-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-message-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-smtp-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-account-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-input-schema.json
- aid: forward-email:forward-email-encrypt-api
  name: Forward Email Encrypt API
  description: Encryption endpoints
  humanURL: https://forwardemail.net/
  baseURL: https://api.forwardemail.net
  tags:
  - Encrypt
  properties:
  - type: OpenAPI
    url: openapi/forward-email-encrypt-api-openapi.yml
  - type: JSONSchema
    url: json-schema/forward-email-domain-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-update-domain-input-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-message-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-smtp-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-account-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-input-schema.json
- aid: forward-email:forward-email-folders-api
  name: Forward Email Folders API
  description: 'Alias folders management endpoints (IMAP/POP3)


    >[!TIP]

    > Folder endpoints with a folder''s path <code>/v1/folders/:path</code> as their endpoint are interchangeable with a folder''s
    ID <code>:id</code>. This means you can refer to the folder by either its <code>path</code> or <code>id</code> value.


    >[!NOTE]

    > Unlike other API endpoints, these require [Authentication](#description/authentication) "username" equal to the alias
    username and "password" equal to the alias generated password as Basic Authorization headers.


    >[!TIP]

    > These endpoints provide full folder management including creation, renaming, and deletion. Folder paths can include
    parent folders (e.g., ''INBOX/Subfolder''), and parent folders will be created automatically if they don''t exist.'
  humanURL: https://forwardemail.net/
  baseURL: https://api.forwardemail.net
  tags:
  - Folders
  properties:
  - type: OpenAPI
    url: openapi/forward-email-folders-api-openapi.yml
  - type: JSONSchema
    url: json-schema/forward-email-domain-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-update-domain-input-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-message-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-smtp-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-account-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-input-schema.json
- aid: forward-email:forward-email-invites-api
  name: Forward Email Invites API
  description: Domain invite management endpoints
  humanURL: https://forwardemail.net/
  baseURL: https://api.forwardemail.net
  tags:
  - Invites
  properties:
  - type: OpenAPI
    url: openapi/forward-email-invites-api-openapi.yml
  - type: JSONSchema
    url: json-schema/forward-email-domain-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-update-domain-input-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-message-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-smtp-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-account-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-input-schema.json
- aid: forward-email:forward-email-logs-api
  name: Forward Email Logs API
  description: Log management endpoints
  humanURL: https://forwardemail.net/
  baseURL: https://api.forwardemail.net
  tags:
  - Logs
  properties:
  - type: OpenAPI
    url: openapi/forward-email-logs-api-openapi.yml
  - type: JSONSchema
    url: json-schema/forward-email-domain-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-update-domain-input-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-message-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-smtp-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-account-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-input-schema.json
- aid: forward-email:forward-email-members-api
  name: Forward Email Members API
  description: Domain member management endpoints
  humanURL: https://forwardemail.net/
  baseURL: https://api.forwardemail.net
  tags:
  - Members
  properties:
  - type: OpenAPI
    url: openapi/forward-email-members-api-openapi.yml
  - type: JSONSchema
    url: json-schema/forward-email-domain-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-update-domain-input-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-message-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-smtp-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-account-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-input-schema.json
- aid: forward-email:forward-email-messages-api
  name: Forward Email Messages API
  description: 'Alias messages management endpoints (IMAP/POP3)


    >[!NOTE]

    > Unlike other API endpoints, these require [Authentication](#description/authentication) "username" equal to the alias
    username and "password" equal to the alias generated password as Basic Authorization headers.


    >[!TIP]

    > These endpoints provide comprehensive message management with advanced search capabilities. You can search by folder,
    flags, content, headers, date ranges, size, and more. Messages can be created using standard Nodemailer format and support
    moving between folders and flag management.


    Please ensure that you have followed setup instructions for your domain.

    These instructions can be found in our FAQ section [Do you support receiving email with IMAP?](/faq#do-you-support-receiving-email-with-imap).'
  humanURL: https://forwardemail.net/
  baseURL: https://api.forwardemail.net
  tags:
  - Messages
  properties:
  - type: OpenAPI
    url: openapi/forward-email-messages-api-openapi.yml
  - type: JSONSchema
    url: json-schema/forward-email-domain-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-update-domain-input-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-message-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-smtp-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-account-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-input-schema.json
- aid: forward-email:forward-email-push-tokens-api
  name: Forward Email Push Tokens API
  description: 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 backgrounded or closed.
  humanURL: https://forwardemail.net/
  baseURL: https://api.forwardemail.net
  tags:
  - Push Tokens
  properties:
  - type: OpenAPI
    url: openapi/forward-email-push-tokens-api-openapi.yml
  - type: JSONSchema
    url: json-schema/forward-email-domain-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-update-domain-input-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-message-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-smtp-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-account-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-input-schema.json
- aid: forward-email:forward-email-sieve-scripts-api
  name: Forward Email Sieve Scripts API
  description: '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, filter, and respond to messages.


    >[!TIP]

    > Supported extensions include: fileinto, reject, ereject, vacation, vacation-seconds, imap4flags, envelope, body, relational,
    comparator-i;ascii-numeric, copy, date, index, editheader, enotify, regex, subaddress, ihave, duplicate, special-use,
    mailbox, environment, and variables. Scripts are validated before saving to ensure they are syntactically correct.


    >[!NOTE]

    > **Two authentication methods are supported:**

    > - **API Token Auth** (`/v1/domains/{domain_id}/aliases/{alias_id}/sieve`): Use your API key as the username with Basic
    Auth. Requires domain_id and alias_id in the URL path.

    > - **Alias Auth** (`/v1/sieve-scripts`): Use the alias email and generated password as Basic Auth credentials. No domain_id
    or alias_id needed in the URL.


    >[!TIP]

    > Script ID parameters accept either the MongoDB ObjectId or the script name, allowing flexible script identification.'
  humanURL: https://forwardemail.net/
  baseURL: https://api.forwardemail.net
  tags:
  - Sieve Scripts
  properties:
  - type: OpenAPI
    url: openapi/forward-email-sieve-scripts-api-openapi.yml
  - type: JSONSchema
    url: json-schema/forward-email-domain-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-update-domain-input-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-message-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-smtp-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-account-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-input-schema.json
- aid: forward-email:forward-email-websockets-api
  name: Forward Email WebSockets API
  description: '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 (IMAP, CalDAV, CardDAV) and global broadcast events, while
    unauthenticated clients receive only global broadcast events (e.g. newRelease). Supports 20 distinct event types covering
    message delivery, moves, copies, flag changes, expunges, mailbox CRUD, calendar CRUD, calendar event CRUD, contact CRUD,
    address book CRUD, and app release broadcasts from the Forward Email Mail App (https://github.com/forwardemail/mail.forwardemail.net).'
  humanURL: https://forwardemail.net/
  baseURL: https://api.forwardemail.net
  tags:
  - WebSockets
  properties:
  - type: OpenAPI
    url: openapi/forward-email-websockets-api-openapi.yml
  - type: JSONSchema
    url: json-schema/forward-email-domain-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-update-domain-input-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-message-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-smtp-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-account-schema.json
  - type: JSONSchema
    url: json-schema/forward-email-alias-input-schema.json
x-submission-probe: 200 2026-10-25
x-enrichment:
  date: '2026-10-26'
  status: enriched
  artifacts_added: 28
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Forward Email API — frequently asked questions

Does Forward Email have an API?

Yes. APIs.io lists 16 APIs from Forward Email, including Forward Email Account API, Forward Email Aliases API and Forward Email Calendar Events API, and 13 more.

Is there an OpenAPI specification for the Forward Email API?

Yes. APIs.io indexes 16 OpenAPI specifications for Forward Email, each linked for download from this page.

How do I authenticate with the Forward Email API?

Forward Email uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Forward Email Authentication.

How much does the Forward Email API cost?

APIs.io lists 4 pricing plans for Forward Email, with each plan's price, limits and inclusions under Pricing Plans on this page.

Does Forward Email have an MCP server?

Yes. APIs.io lists 1 MCP server for Forward Email.

Is the Forward Email API ready for AI agents?

Forward Email has a Kin Score of 60.1 out of 100 (strong) and an Agent Readiness score of 33.2 (agent-ready), scored by API Evangelist on 2026-10-31.

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