# Hooktheory — Wrapped API

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> Search through 65,000+ songs to discover their music theory details like chords, melody notes, keys, tempos, and meters. Break down any song into its individual sections and examine the exact notes used in each part.

**Category:** Music | **Website:** [www.hooktheory.com/theorytab](https://www.hooktheory.com/theorytab) | **Docs:** [parse.bot/marketplace/5483984b-7030-4e96-a4eb-a3b2686b72bb/hooktheory-com-api](https://parse.bot/marketplace/5483984b-7030-4e96-a4eb-a3b2686b72bb/hooktheory-com-api)

Pay-per-use API proxy. Each call is automatically billed to your wallet in USDC.

## Access

**Base URL:** `https://api.paywithlocus.com/api/wrapped/parse-hooktheory-com-api-5483984b/`
**Auth:** `Authorization: Bearer <LOCUS_API_KEY>`

## Endpoints

### get_section_notes

Retrieve full music theory data for a specific song section including chords (root, type, inversion, duration, applied intervals), melody notes (scale degree, octave, beat, duration), key signatures, tempos, time signatures, and YouTube sync points. Requires a section_id obtained from get_song_sections.

**Estimated cost:** Metered

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `section_id` | string | Yes | Section ID from get_song_sections endpoint (e.g. 'ROmNOXDjngN') |

```bash
curl -X POST https://api.paywithlocus.com/api/wrapped/parse-hooktheory-com-api-5483984b/get_section_notes \
  -H "Authorization: Bearer YOUR_LOCUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"section_id":"<string>"}'
```

### get_song_sections

Retrieve all sections (intro, verse, chorus, bridge, etc.) for a specific song identified by artist and song URL slugs. Returns section IDs required by the get_section_notes endpoint. Slugs are lowercase hyphenated forms of the artist/song name.

**Estimated cost:** Metered

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `artist` | string | Yes | Artist URL slug (e.g. 'queen', 'the-beatles') |
| `song` | string | Yes | Song URL slug (e.g. 'bohemian-rhapsody', 'let-it-be') |

```bash
curl -X POST https://api.paywithlocus.com/api/wrapped/parse-hooktheory-com-api-5483984b/get_song_sections \
  -H "Authorization: Bearer YOUR_LOCUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"artist":"<string>","song":"<string>"}'
```

### search_songs

Full-text search over Hooktheory's TheoryTab database of 65,000+ songs. Matches song titles and artist names. Returns chord progressions (absolute and relative notation), key signatures, section types, and YouTube IDs. Paginated via offset/limit.

**Estimated cost:** Metered

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `limit` | integer | No | Maximum number of results to return (max 200) |
| `offset` | integer | No | Offset for pagination |
| `query` | string | Yes | Search keyword (song name, artist, etc.) |

```bash
curl -X POST https://api.paywithlocus.com/api/wrapped/parse-hooktheory-com-api-5483984b/search_songs \
  -H "Authorization: Bearer YOUR_LOCUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"limit":"<integer>","offset":"<integer>","query":"<string>"}'
```