# List Slack channels

`GET https://evohub.io/api/v1/slack/channels`

Part of the [On-Call API](https://docs-dev.evohub.io/oncall.md) reference · operationId `listSlackChannels`.

The connected workspace's channels, for choosing where an escalation step or
the default channel posts.

**Permission (API-key scope):** `oncall:escalation:write`.

## Authorization

Any one of:

- `bearerAuth` (oncall:escalation:write)
- `apiKeyHeader` (oncall:escalation:write)

Where:

- `bearerAuth`: HTTP Bearer — An EvoHub API key (`evohub_…`) as a bearer token.
- `apiKeyHeader`: API key in the header `X-API-Key` — An EvoHub API key (`evohub_…`).

## Responses

### 200 — The channels.

Content type: `application/json`

Type: `object`

- `data` (array of SlackChannel, required)
  - `id` (string)
  - `name` (string)
  - `private` (boolean)
- `success` (boolean, required, value `true`)

### 401 — No API key was sent, or it is unknown, revoked or expired (`UNAUTHORIZED`).

Content type: `application/json`

Type: `Error`

- `error` (object, required)
  - `code` (string, required): Machine-readable code. Branch on this.
  - `message` (string, required): Human-readable explanation.

### 403 — The key lacks the scope this endpoint needs (`FORBIDDEN`).

Content type: `application/json`

Type: `Error`

- `error` (object, required)
  - `code` (string, required): Machine-readable code. Branch on this.
  - `message` (string, required): Human-readable explanation.

### 409 — Slack is not connected (`SLACK_NOT_CONNECTED`).

Content type: `application/json`

Type: `Error`

- `error` (object, required)
  - `code` (string, required): Machine-readable code. Branch on this.
  - `message` (string, required): Human-readable explanation.

### 429 — Too many requests (`RATE_LIMITED`). Wait `Retry-After` seconds.

Headers:

- `Retry-After` (integer): Seconds to wait.

Content type: `application/json`

Type: `Error`

- `error` (object, required)
  - `code` (string, required): Machine-readable code. Branch on this.
  - `message` (string, required): Human-readable explanation.

### 500 — Something went wrong on EvoHub's side (`INTERNAL_ERROR`). Retry later.

Content type: `application/json`

Type: `Error`

- `error` (object, required)
  - `code` (string, required): Machine-readable code. Branch on this.
  - `message` (string, required): Human-readable explanation.

### 502 — Slack did not return the list (`SLACK_ERROR`).

Content type: `application/json`

Type: `Error`

- `error` (object, required)
  - `code` (string, required): Machine-readable code. Branch on this.
  - `message` (string, required): Human-readable explanation.

## Example request

```bash
curl -X GET 'https://evohub.io/api/v1/slack/channels' \
  -H 'Authorization: Bearer <TOKEN>'
```