API Endpoint Reference

/api/v1/audio-converter

Convert audio files to MP3, WAV, or AAC.

Get API Key Pricing & Tokens

Auth

Bearer or X-API-Key

Every request must include a valid user API key.

Estimate first

Preview token cost

Estimate endpoints help validate input and expected usage before processing.

Response

Download URL on success

Successful sync responses return a result URL plus token details.

Tool Usage Notes

Accepts one or multiple audio URLs.
Output format can be mp3, wav, or aac.
If one file is converted, you get a single audio file.
If multiple files are converted, you get a ZIP file.

Estimate Before Processing

Use the estimate endpoint to preview token cost and validate your input URLs before starting conversion.

curl -X POST https://your-domain.example/api/v1/audio-converter/estimate \
  -H "Authorization: Bearer fm_live_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "inputs": ["https://example.com/file"],
    "response_type": "json"
  }'

{
  "ok": true,
  "tool": "audio-converter",
  "mode": "estimate",
  "estimated_tokens": 1,
  "available_tokens": 10,
  "enough_tokens": true,
  "shortfall_tokens": 0
}

Example Request

Set target audio output format.

curl -X POST https://your-domain.example/api/v1/audio-converter \
  -H "Authorization: Bearer fm_live_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "inputs": ["https://example.com/input.wav"],
    "output_format": "mp3",
    "response_type": "json"
  }'

Request Parameters Breakdown

Parameter	Required	Type	Options	Default	Example
inputs	Yes	array<string>	HTTP/HTTPS URL(s) to audio files	`none (required)`	`["https://example.com/input.wav"]`
Provide one or more audio URLs.
output_format	Yes	string	`mp3, wav, aac`	`none (required)`	`mp3`
Target output audio format.
response_type	No	string	`json, xml, text`	`json`	`json`
Controls API response payload format.
promo_code	No	string	Any active promo code	`empty`	`SPRING25`
Optional; applies discount rules when valid.

Example Response

Converted audio file is provided via download URL.

{
  "ok": true,
  "tool": "audio-converter",
  "mode": "sync",
  "status": "completed",
  "download_url": "https://your-domain.example/tool/audio-converter/jobs/.../download",
  "estimated_tokens": 1,
  "final_tokens": 1
}

Response Fields Breakdown

Field	Type	Always Returned	Example
ok	boolean	Yes	`true`
Indicates success/failure.
tool	string	Yes	`audio-converter`
Tool identifier.
mode	string	Yes	`sync`
Current execution mode.
status	string	Yes	`completed`
Processing state.
download_url	string	Yes	`https://your-domain.example/tool/audio-converter/jobs/.../download`
Single file or ZIP download URL.
estimated_tokens	integer	Yes	`1`
Estimated reserved tokens.
final_tokens	integer	Yes	`1`
Final charged tokens.