Customer.io Objects API

Objects are "groups" that you can relate people to in Customer.io—like the companies they work for, the online classes they take, and so on. These APIs help you find objects, their attributes, the people they're related to, etc. Use the [track API v1](/api/track/#tag/Track-Customers) or the [Track v2 API](/api/track/#tag/track_v2) to add and relate people to objects to your workspace and assign their attributes.

Operations 4

Each operation below carries the questions people ask an LLM about it and the instructions they give an agent to run it. Generated by API Evangelist overlay

GET /v1/object_types List object types · List object types #
Ask an LLM
“What object types, like companies or accounts, exist in my workspace?”
“How do I find the ID of an object type?”
Tell an agent
List my object types.
Show the IDs of every object type in this workspace.
POST /v1/objects Find objects matching a filter · Find objects #
Ask an LLM
“How do I find all accounts whose plan attribute is enterprise?”
“Can I search objects of one type by their attributes?”
Tell an agent
Find objects of type {object_type_id} matching {filter}.
Search up to {limit} objects of type {object_type_id} where {filter}.
GET /v1/objects/{object_type_id}/{object_id}/relationships List people related to an object · Get Object Relationships #
Ask an LLM
“Which people belong to a given company or account object?”
“How do I page through the people related to an object?”
Tell an agent
List people related to object {object_id} of type {object_type_id}.
Show the members of account {object_id} (object type {object_type_id}).
GET /v1/objects/{object_type_id}/{object_id}/attributes Get an object's attributes · Get Object Attributes #
Ask an LLM
“What attributes are stored on a particular account object?”
“How do I see an object's billing date or name?”
Tell an agent
Get attributes for object {object_id} of type {object_type_id}.
Show what we know about object {object_id} in type {object_type_id}.

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • 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.
All 92 tools →

Call it yourself

curl for this page
This API
curl "https://apis.io/api/v1/apis/customer-io:customer-io-objects-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

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 Specification

customer-io-objects-api-openapi.yml Raw ↑
openapi: 3.2.0
info:
  version: 1.0.0
  title: Customer.io App Objects API
  description: Our App API provides ways to trigger messages and retrieve information about people, campaigns, broadcasts, and more.
servers:
- url: https://api.customer.io
  description: The base URL for broadcasts, transactional messages, and data-retrieval APIs. These endpoints use bearer authorization, and require a [token that you generate in the UI](https://fly.customer.io/settings/api_credentials?keyType=app).
- url: https://api-eu.customer.io
  description: The base URL for broadcasts, transactional messages, and data-retrieval APIs (EU region). These endpoints use bearer authorization, and require a [token that you generate in the UI](https://fly.customer.io/settings/api_credentials?keyType=app).
tags:


# --- truncated at 32 KB (38 KB total) ---
# Full source: https://raw.githubusercontent.com/api-evangelist/customer-io/refs/heads/main/openapi/customer-io-objects-api-openapi.yml