youtube-channels

1# YouTube Channels
2 
3YouTube channel tools via [TranscriptAPI.com](https://transcriptapi.com).
4 
5## Setup
6 
7If `$TRANSCRIPT_API_KEY` is not set, read [references/auth-setup.md](references/auth-setup.md) and follow the instructions there to get and store the key.
8 
9## Required Headers
10 
11Every request needs two headers:
12 
13- **Authorization:** `Bearer $TRANSCRIPT_API_KEY`
14- **User-Agent:** your agent's name and version if known (e.g. `HermesAgent/0.11.0`, `ClaudeCode/1.0`). Version is optional — agent name alone is fine. Do not omit this header or send a bare default — Cloudflare will return a 403 (error code 1010) and block the request.
15 
16## API Reference
17 
18Full OpenAPI spec: [transcriptapi.com/openapi.json](https://transcriptapi.com/openapi.json) — consult this for the latest parameters and schemas.
19 
20All channel endpoints accept flexible input — `@handle`, channel URL, or `UC...` channel ID. No need to resolve first.
21 
22## GET /api/v2/youtube/channel/resolve — FREE
23 
24Convert @handle, URL, or UC... ID to canonical channel ID.
25 
26```bash
27curl -s "https://transcriptapi.com/api/v2/youtube/channel/resolve?input=@TED" \
28  -H "Authorization: Bearer $TRANSCRIPT_API_KEY" \
29  -H "User-Agent: YourAgent/1.0"
30```
31 
32| Param   | Required | Validation                              |
33| ------- | -------- | --------------------------------------- |
34| `input` | yes      | 1-200 chars — @handle, URL, or UC... ID |
35 
36**Response:**
37 
38```json
39{ "channel_id": "UCsT0YIqwnpJCM-mx7-gSA4Q", "resolved_from": "@TED" }
40```
41…