# agentutility MP4 to MP3 Converter

> agentutility MP4 to MP3 Converter is a paid API for AI agents from x402.agentutility.ai, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Converts an MP4 video file to an MP3 audio file and returns a download URL, bitrate, and file size.

## Facts

- Endpoint: POST https://x402.agentutility.ai/mp4-to-mp3-converter
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentutility-mp4-to-mp3-converter-a44719da
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_u-b9_GRUWek3FVJ4Lb79C

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 agentutility-mp4-to-mp3-converter-a44719da -d '<json body>'
```

Example prompt: Can you convert this mp4 video to an mp3 audio file for me? Here's the link: https://example.com/video.mp4

## When to prefer this

Use this endpoint when you need a quick, pay-per-use MP4-to-MP3 audio extraction without managing your own FFmpeg infrastructure. Ideal for agents that occasionally need to pull audio from video files and want a simple REST call with USDC micropayment via x402 on Base.

## Known failure modes

- Invalid or inaccessible MP4 URL returns an error
- Unsupported video format or corrupted file causes conversion failure
- Payment not settled in USDC causes 402 rejection
- Large file sizes may exceed processing limits
- Network timeout if source video is very large or slow to fetch

## How this service works

Paid x402 endpoints organized into product clusters. USDC-settled on Base. MCP-callable. ERC-8004 identity registry agentId 47167.

## Output

Returns a JSON object with the MP3 audio download URL, the bitrate in kbps (e.g. 128), and the file size in bytes (e.g. 161109).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "required": [
      "video_url"
     ],
     "properties": {
      "bitrate": {
       "enum": [
        96,
        128,
        192
       ],
       "type": "number",
       "description": "Output MP3 bitrate in kbps. 96 (smaller, voice), 128 (default, balanced), 192 (higher quality)."
      },
      "video_url": {
       "type": "string",
       "description": "Public URL of the source video. Max 500MB / 60 minutes."
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "bitrate": {
       "type": "integer"
      },
      "audio_url": {
       "type": "string"
      },
      "file_size_bytes": {
       "type": "integer"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "bitrate": 128,
  "audio_url": "https://...mp3",
  "file_size_bytes": 161109
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentutility-mp4-to-mp3-converter-a44719da/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.agentutility.ai](https://www.zero.xyz/host/x402.agentutility.ai/llms.txt)