CustomerOS Mailboxes API
The Mailboxes API from CustomerOS — 1 operation(s) for mailboxes.
The Mailboxes API from CustomerOS — 1 operation(s) for mailboxes.
Every API here is available over the APIs.io API and to AI agents over MCP.
One button, every client — Claude, Cursor, VS Code and the rest.
https://apis.io/mcp
find_apisBrowse and filter every API in the catalog.get_api_artifactsOne API's artifacts, grouped by type.get_openapiThe primary OpenAPI for this API.find_similar_apisAPIs that look like this one.apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.resolveTurn a domain, URL or GitHub org into the provider it belongs to.find_cohortsEvery scored population of providers in the catalog.curl "https://apis.io/api/v1/apis/customeros-mailboxes-api"
curl "https://apis.io/api/v1/apis?limit=25"
Discovery needs no key. Ratings and market analysis are Pro.
Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.
A second provider on the same verified email joins the account you already have.
openapi: 3.2.0
info:
title: CustomerOS Mailboxes API
description: CustomerOS API for multiple services (Verify, Enrich, Orgs)
contact: {}
version: '1.0'
servers:
- url: https://api.customeros.ai/
tags:
- name: Mailboxes
paths:
/domains/{domain}/mailboxes:
get:
tags:
- Mailboxes
summary: List mailboxes
description: Retrieves all mailboxes configured for the specified domain
parameters:
- name: domain
in: path
description: Domain name
required: true
schema:
type: string
responses:
'200':
description: Successfully retrieved mailboxes
content:
application/json:
schema:
$ref: '#/components/schemas/restmailstack.MailboxesResponse'
'400':
description: Missing domain parameter
content:
application/json:
schema:
$ref: '#/components/schemas/rest.ErrorResponse'
'401':
description: Unauthorized - Missing or invalid API key
content:
application/json:
schema:
$ref: '#/components/schemas/rest.ErrorResponse'
'404':
description: Domain not found
content:
application/json:
schema:
$ref: '#/components/schemas/rest.ErrorResponse'
'500':
description: Internal server error
content:
application/json:
schema:
$ref: '#/components/schemas/rest.ErrorResponse'
security:
- ApiKeyAuth: []
post:
tags:
- Mailboxes
summary: Create mailbox
description: Creates a new mailbox for the specified domain with optional forwarding and webmail access
parameters:
- name: domain
in: path
description: Domain name
required: true
schema:
type: string
requestBody:
description: Mailbox configuration
content:
application/json:
schema:
$ref: '#/components/schemas/restmailstack.MailboxRequest'
required: true
responses:
'200':
description: Mailbox created successfully with generated password
content:
application/json:
schema:
$ref: '#/components/schemas/restmailstack.MailboxResponse'
'400':
description: Invalid request - Missing or invalid parameters
content:
application/json:
schema:
$ref: '#/components/schemas/rest.ErrorResponse'
'401':
description: Unauthorized - Missing or invalid API key
content:
application/json:
schema:
$ref: '#/components/schemas/rest.ErrorResponse'
'404':
description: Domain not found
content:
application/json:
schema:
$ref: '#/components/schemas/rest.ErrorResponse'
'409':
description: Mailbox already exists
content:
application/json:
schema:
$ref: '#/components/schemas/rest.ErrorResponse'
'500':
description: Internal server error
content:
application/json:
schema:
$ref: '#/components/schemas/rest.ErrorResponse'
security:
- ApiKeyAuth: []
x-codegen-request-body-name: body
components:
schemas:
restmailstack.MailboxRequest:
type: object
properties:
forwardingTo:
type: array
description: 'List of email addresses to forward to
required: false
maxItems: 10
example: ["user1@example.com","user2@example.com"]'
items:
type: string
linkedUser:
type: string
description: 'Associated user''s email address
required: false
format: email
example: john.doe@mycompany.com'
password:
type: string
description: 'Password for mailbox access
required: false
minLength: 8
maxLength: 64
example: SecurePassword123!'
username:
type: string
description: 'Username for the mailbox
required: true
pattern: ^[a-zA-Z0-9._%+-]+$
minLength: 3
maxLength: 64
example: john.doe'
webmailEnabled:
type: boolean
description: 'Enable webmail access
required: false
default: false'
description: Request payload for creating and configuring a new mailbox
rest.ErrorResponse:
type: object
properties:
message:
type: string
requestId:
type: string
example: 1234567890abcdef
status:
type: string
description: Status indicates the result of the operation ("success" or "error")
example: success
restmailstack.MailboxRecord:
type: object
properties:
email:
type: string
description: 'Email address for the mailbox
required: true
format: email
example: user@example.com'
forwardingEnabled:
type: boolean
description: 'Email forwarding status
required: true
default: false'
forwardingTo:
type: array
description: 'List of forwarding email addresses
required: false
maxItems: 10'
items:
type: string
password:
type: string
description: 'Mailbox password (only included in specific responses)
required: false
minLength: 8
maxLength: 64'
webmailEnabled:
type: boolean
description: 'Webmail access status
required: true
default: false'
description: Comprehensive mailbox configuration and status
restmailstack.MailboxResponse:
type: object
properties:
mailbox:
type: object
description: 'Mailbox information
required: false'
allOf:
- $ref: '#/components/schemas/restmailstack.MailboxRecord'
requestId:
type: string
example: 1234567890abcdef
status:
type: string
description: Status indicates the result of the operation ("success" or "error")
example: success
description: Response containing mailbox details and status
restmailstack.MailboxesResponse:
type: object
properties:
mailboxes:
type: array
description: 'List of mailboxes
required: false'
items:
$ref: '#/components/schemas/restmailstack.MailboxRecord'
requestId:
type: string
example: 1234567890abcdef
status:
type: string
description: Status indicates the result of the operation ("success" or "error")
example: success
description: Response containing list of mailboxes and status
securitySchemes:
ApiKeyAuth:
type: apiKey
name: X-CUSTOMER-OS-API-KEY
in: header
x-original-swagger-version: '2.0'