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CustomerOS Mailboxes API

The Mailboxes API from CustomerOS — 1 operation(s) for mailboxes.

CustomerOS Mailboxes API is one of 11 APIs that CustomerOS publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Mailboxes. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

This API exposes 2 operations across 1 path, and defines 5 schemas. It is described by OpenAPI 3.2.0, at version 1.0.

Requests are made against a single base URL, https://api.customeros.ai/.

2 operations 1 paths 5 schemas 1 GET1 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
1.0
Base URL
https://api.customeros.ai
Authentication
API Key
Resource Areas
1

Authentication & Security 1

CustomerOS Mailboxes API declares 1 security scheme for authenticating requests. An API key is passed in the header as X-CUSTOMER-OS-API-KEY (ApiKeyAuth).

Paths & Operations 2

Across 1 path, the API surfaces 2 operations — 1 GET, 1 POST. Each is listed below with its method, path, parameters, and response codes.

Mailboxes 2
GET
/domains/{domain}/mailboxes
List mailboxes
1 param → 200400401404500
POST
/domains/{domain}/mailboxes
Create mailbox
1 param body → 200400401404409500

Schemas 5

The contract defines 5 schemas that model the data the API accepts and returns. The most detailed are restmailstack.MailboxRecord (5 properties), restmailstack.MailboxRequest (5 properties), restmailstack.MailboxesResponse (3 properties), restmailstack.MailboxResponse (3 properties). Each schema is shown below with its type and property counts.

restmailstack.MailboxRequest
object
Request payload for creating and configuring a new mailbox
5 properties
rest.ErrorResponse
object
3 properties
restmailstack.MailboxRecord
object
Comprehensive mailbox configuration and status
5 properties
restmailstack.MailboxResponse
object
Response containing mailbox details and status
3 properties
restmailstack.MailboxesResponse
object
Response containing list of mailboxes and status
3 properties

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

customeros-mailboxes-api-openapi.yml Raw ↑

Other APIs CustomerOS publishes across the network.

CustomerOS Website Tracker
CustomerOS GraphQL API
CustomerOS Billing API
CustomerOS CustomerBASE API
CustomerOS Domains API
CustomerOS Email Verification API
CustomerOS Enrichment API
CustomerOS Flows API
CustomerOS IP Intelligence API
CustomerOS Outreach API
Where this information came from

This is an independent, third-party profile of CustomerOS Mailboxes API, 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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