Index onlineMerchant portal
Api Endpoint

Speech to Text Transcription (Wh

Audio transcription and speech to text: transcribe a voice note, meeting, podcast or call recording into text with timestamps, in about 100 languages with automatic language detection. Runs OpenAI Whisper (small by default, base for speed) on agentsvc.io itself, the audio is deleted after the call. Send audio_url or audio_base64 (mp3, mp4, m4a, wav, ogg, webm, flac), up to 10 minutes and 24 MB per call. Returns text, detected language, duration and segments with start and end seconds.

Open interactive test console

Offering

Provider
agentsvc.io
Method
POST
Offering type
Api Endpoint
Transport type
http
Category
Creative
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://agentsvc.io/api/v1/proxy/audio-transcribe
MIME type
application/json
First seen
2026-10-16T01:50:45.949Z
Last seen
Tags
audio transcription, transcribe audio, speech to text, transcription, whisper

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1
0.01 USDC
Atomic price: 10000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2
0.01 USDC
Atomic price: 10000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact
Payment option 3
0.01 USDC
Atomic price: 10000 · Network: eip155:137 · Asset: USDC · Scheme: exact
Payment option 4
0.01 USDC
Atomic price: 10000 · Network: eip155:42161 · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "payTo": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27"
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "10000",
    "payTo": "5JzPS5qpEwUM1vTC9GG7uqvwJdHzbEwfoPHf2Ki977tg"
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "10000",
    "payTo": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27"
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "10000",
    "payTo": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27"
  }
]

Observed health

Status
Healthy
Latest latency
310 ms
Average latency
596 ms
HTTP status
204
Last checked
Reachability
100% over 14 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "POST",
        "PUT",
        "PATCH"
      ]
    },
    "bodyType": {
      "type": "string",
      "enum": [
        "json",
        "form-data",
        "text"
      ]
    },
    "body": {
      "properties": {
        "audio_url": {
          "type": "string",
          "description": "Public URL of the audio file"
        },
        "audio_base64": {
          "type": "string",
          "description": "Audio file as base64; or use audio_url"
        },
        "language": {
          "type": "string",
          "description": "ISO 639-1 code like en or de, default auto-detect"
        },
        "model": {
          "type": "string",
          "enum": [
            "small",
            "base"
          ],
          "default": "small",
          "description": "small is more accurate, base about twice as fast"
        },
        "timestamps": {
          "type": "boolean",
          "default": true,
          "description": "Include segments with start and end seconds"
        }
      },
      "required": []
    }
  },
  "required": [
    "type",
    "method",
    "bodyType",
    "body"
  ],
  "additionalProperties": false
}

Output schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string"
    },
    "example": {
      "type": "object",
      "required": [
        "success",
        "data"
      ],
      "properties": {
        "success": {
          "type": "boolean"
        },
        "data": {
          "type": "object",
          "properties": {
            "text": {
              "type": "string"
            },
            "language": {
              "type": "string"
            },
            "language_probability": {
              "type": "number"
            },
            "duration_seconds": {
              "type": "number"
            },
            "model": {
              "type": "string"
            },
            "processing_ms": {
              "type": "integer"
            },
            "segments": {
              "type": "array",
              "items": {
                "type": "object",
                "properties": {
                  "start": {
                    "type": "number"
                  },
                  "end": {
                    "type": "number"
                  },
                  "text": {
                    "type": "string"
                  }
                }
              }
            },
            "model_license": {
              "type": "string"
            }
          },
          "required": [
            "text",
            "language",
            "duration_seconds"
          ]
        }
      }
    }
  },
  "required": [
    "type"
  ]
}