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Customer.io Messages API

Retrieve information about individual messages sent to customers.

Customer.io Messages API is one of 42 APIs that Customer.io publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

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

This API exposes 3 operations across 3 paths. It is described by OpenAPI 3.2.0, at version 1.0.0.

Requests are made against 2 base URLs: https://api.customer.io, https://api-eu.customer.io.

3 operations 3 paths 0 schemas 3 GET

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
1.0.0
Base URL
https://api.customer.io
Authentication
HTTP Bearer, HTTP Bearer, HTTP Bearer
Resource Areas
1

Authentication & Security 3

Customer.io Messages API declares 3 security schemes for authenticating requests. It accepts HTTP bearer tokens (Bearer-Auth). It accepts HTTP bearer tokens (sa_live_) (ServiceAccount-Auth). It accepts HTTP bearer tokens (bearerAuth).

  • Bearer-Auth — The App API uses a bearer authentication scheme. You can generate a bearer token, known as an App API Key, with a defined scope in [your account settings](http…
  • ServiceAccount-Auth — Transactional send endpoints (/v1/send/email, /v1/send/push, /v1/send/sms, /v1/send/inapp, /v1/send/inboxmessage) also accept a service-account bearer token, p…
  • bearerAuth — API key passed as a Bearer token

Paths & Operations 3

Across 3 paths, the API surfaces 3 operations — 3 GET. Each is listed below with its method, path, parameters, and response codes.

Messages 3

Return information about message and webhook "deliveries"—the instance of a message or webhook intended for an individual recipient.

GET
/v1/messages
List messages
listMessages 11 params → 200400429
GET
/v1/messages/{message_id}
Get a message
getMessage 2 params → 200404429
GET
/v1/messages/{message_id}/archived_message
Get an archived message
getArchivedMessage 1 param → 200404429

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

customer-io-messages-api-openapi.yml Raw ↑

Other APIs Customer.io publishes across the network.

Customer.io Track API
Customer.io Activities API
Customer.io Alias API
Customer.io Batch API
Customer.io Broadcasts API
Customer.io Campaigns API
Customer.io Collections API
Customer.io Customers API
Customer.io Exports API
Customer.io Group API
Customer.io Identify API
Customer.io Newsletters API
Where this information came from

This is an independent, third-party profile of Customer.io Messages 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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