---
title: "List topics"
method: GET
path: "/topics"
tags: ["Topics"]
---

# List topics

`GET /topics`

## Request

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

Every topic the organization has defined, by name, with the number of contacts explicitly opted in to each. Unpaginated — the list is capped at 100 entries.

## Response `200`

The topics.

- ListTopicsResponse
  - `data` Topic[], required
    - `id` string, uuid, required
    - `name` string, required
    - `description` string, nullable, required
    - `defaultSubscription` 'opt_in' | 'opt_out', required: What a contact who has never expressed a preference receives. Fixed at creation.
    - `visibility` 'public' | 'private', required
    - `subscriberCount` integer: Contacts who explicitly opted in. Returned by create and list, not by get. For an `opt_out` topic this is the reachable audience; for an `opt_in` topic it is not, since everyone who never chose is subscribed too.
    - `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)