---
title: "List contact properties"
method: GET
path: "/contact-properties"
tags: ["Contact properties"]
---

# List contact properties

`GET /contact-properties`

## Request

- Base URL: `https://api.eusend.dev`
- URL: `https://api.eusend.dev/contact-properties`
- Auth: HTTP bearer

Every property the organization has defined, by name. Unpaginated — the registry is capped at 100 entries.

## Response `200`

The properties.

- ListContactPropertiesResponse
  - `data` ContactProperty[], required
    - `id` string, uuid, required
    - `key` string, required
    - `type` 'string' | 'number', required
    - `fallbackValue` string, nullable, required: Substituted into `{{key}}` for contacts carrying no value of their own. `null` renders empty.
    - `createdAt` string, date-time, required
    - `updatedAt` string, date-time, nullable

## Other responses

- `401`: Missing, malformed, or revoked API key (`UNAUTHORIZED`).
- `403`: The key exists but may not reach this resource — a `sending_access` key outside the send paths, a test-mode key writing live state, or an account on hold (`FORBIDDEN`, `ACCOUNT_RESTRICTED`).
- `429`: Rate limit exceeded (`RATE_LIMITED`).
- `500`: Unexpected server error (`INTERNAL_ERROR`). Carries `request_id`.

---

[API](https://skmtc.dev/eusend/apis/eusend-api.md) · [All operations](https://skmtc.dev/eusend/apis/eusend-api/llms.txt) · [OpenAPI document](https://skmtc.dev/eusend/apis/eusend-api/revisions/bec561f55488?raw)