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Customer.io Identify API

Identify people and set their profile attributes. The identify call tells Customer.io who the current user is and assigns traits to them.

Customer.io Identify 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 Identify. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

This API exposes 1 operation across 1 path, and defines 10 schemas. It is described by OpenAPI 3.2.0, at version 1.0.0.

Requests are made against 2 base URLs: https://cdp.customer.io/v1, https://cdp-eu.customer.io/v1.

1 operations 1 paths 10 schemas 1 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
1.0.0
Base URL
https://cdp.customer.io/v1
Authentication
HTTP Basic
Resource Areas
1

Authentication & Security 1

Customer.io Identify API declares 1 security scheme for authenticating requests. It accepts HTTP basic authentication (Basic-Auth).

  • Basic-Auth — The Data Pipelines API uses a basic authentication scheme with your API key. Because basic authorization typically expects a username and password combination,…

Paths & Operations 1

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

Identify 1
POST
/identify
Add and Update People
identify 1 param body → 200

Schemas 10

The contract defines 10 schemas that model the data the API accepts and returns. The most detailed are common_fields (8 properties), context_page (7 properties), context_common (5 properties). Each schema is shown below with its type and property counts.

userId
string
The unique identifier for a person. This value should be unique across systems, so you recognize the same person in your sources and destinations.
context_mobile
A dictionary of context about a source call/event, like the user’s IP address or locale. Context is automatically collected by our source libraries.
all_common_fields
integrations
object
Contains a list of booleans indicating the integrations that are enabled (true) or disabled (false). By default, all integrations are enabled (returning an emp…
identify
anonymousId
string
A unique substitute for a User ID in cases when you don’t have an absolutely unique identifier. Our libraries generate this value automatically to help you tra…
context_common
object
Contains contextual information about the event.
5 properties
context_page
object
Contains information about the current page in the browser. This is automatically collected by our JavaScript source.
7 properties
context_non_mobile
A dictionary of context about a source call/event, like the user’s IP address or locale. Context is automatically collected by our source libraries.
common_fields
object
8 properties

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

customer-io-identify-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 Messages API
Customer.io Newsletters API
Where this information came from

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