# Blockbuster.ai YouTube MP3 Audio Extractor

> Blockbuster.ai YouTube MP3 Audio Extractor is a paid API for AI agents from blockbuster-ai.vercel.app, paid per call via x402, $0.07/call, status unknown (last checked 2026-09-14).

Converts a YouTube video into a downloadable MP3 audio file given a video URL or search query

## Facts

- Endpoint: POST https://blockbuster-ai.vercel.app/api/youtube-mp3-audio
- Price: $0.07/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blockbuster-ai-youtube-mp3-audio-extractor-641b2230
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2BKs_dX-0pYdhLEj3a57S

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability blockbuster-ai-youtube-mp3-audio-extractor-641b2230 -d '<json body>'
```

Example prompt: Can you download the audio from this YouTube video as an MP3? Here's the link: https://www.youtube.com/watch?v=dQw4w9WgXcQ

## When to prefer this

Use this endpoint when an agent needs to extract or download audio from a YouTube video as an MP3 file, especially in workflows involving podcast archiving, offline listening, audio transcription pipelines, or music extraction. Prefer this over generic media conversion tools when the source is specifically YouTube.

## Known failure modes

- Invalid or non-existent YouTube URL returns error
- Video is age-restricted or private and cannot be accessed
- YouTube rate limiting or geo-blocking prevents access
- Video has no audio track
- Query string does not resolve to a valid video
- Payment failure via x402 micropayment on Base chain

## How this service works

115+ premium paid endpoints: Social Media, AI/ML, E-commerce, Finance, Data Intelligence, Media, Tools. x402 micropayments on Base chain.

## Output

Returns a data object containing a link or binary data for the extracted MP3 audio, along with a success boolean indicating whether the conversion completed successfully.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "query": {
   "type": "string",
   "description": "Input parameter for the API call"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "data": {
   "type": "object"
  },
  "success": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockbuster-ai-youtube-mp3-audio-extractor-641b2230/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from blockbuster-ai.vercel.app](https://www.zero.xyz/host/blockbuster-ai.vercel.app/llms.txt)