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Customer.io Track Segments API

Manual segments are lists of people that you incorporate using the API or by uploading CSVs. You can add people to, or remove people from, manual segments with these endpoints. These endpoints do _not_ let you modify data-driven segments.**NOTE**: These endpoints do not yet support workspaces that use both `email` and `id` as identifiers.A segment must exist before you can add people to it. You can create manual segments using the [App API `/segments` endpoints](/api/#operation/createManSegment).

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

This API exposes 2 operations across 2 paths. It is described by OpenAPI 3.2.0, at version 1.0.0.

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

2 operations 2 paths 0 schemas 2 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://track.customer.io
Authentication
HTTP Basic
Resource Areas
1

Authentication & Security 1

Customer.io Track Segments API declares 1 security scheme for authenticating requests. It accepts HTTP basic authentication (Tracking-API-Key).

  • Tracking-API-Key — The Track API uses a basic authentication scheme. Your credentials are your Site ID and your API key, Base-64 encoded in the format siteid:apikey. You can find…

Paths & Operations 2

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

Track Segments 2

Manual segments are lists of people that you incorporate using the API or by uploading CSVs. You can add people to, or remove people from, manual segments with these endpoints. Th…

POST
/api/v1/segments/{segment_id}/add_customers
Add people to a manual segment
add_to_segment 2 params body → 200400401
POST
/api/v1/segments/{segment_id}/remove_customers
Remove people from a manual segment
remove_from_segment 2 params body → 200400401

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

customer-io-track-segments-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 Messages API
Where this information came from

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