---
ref: tool:customer-io/search-people
name: Search people
company: company:customer-io
workflows: []
access: [api]
tags: [capability:build-audience, category:email, has:api]
docs: https://docs.customer.io/integrations/api/app/tag/customers/getPeopleFilter/
updated: 2026-09-27
---

# Search people

Returns up to 1,000 people in a workspace who match a filter on segment membership and attribute values.

Note: For a set larger than the 1,000-person cap, export the people with `POST /v1/exports/customers` instead.

## Set up

Use the first option your agent supports.

### API (official)

- Base URL: https://api.customer.io
- Endpoint: `POST /v1/customers`
- Auth: send the header `Authorization: Bearer $CUSTOMERIO_API_KEY`
- Get a key: https://fly.customer.io/settings/api_credentials?keyType=app
- Docs: https://docs.customer.io/integrations/api/app/

Before anything else, confirm access with the cheapest read-only call, like a list or a search. Never send or change anything to test access.

## Rules

- Ask the user before anything that sends messages, costs money, or changes data, and say how many records it touches. One approval covers a batch the user has seen.
- Never print API keys.