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GEDX402 ASR Flux - Automatic Speech Recognition
x402
GEDX402 ASR Flux - Automatic Speech Recognition is a paid API for AI agents from media.gedx402.com, paid per call via x402, $0.098/call, not verified (last probed 2026-10-28); live alternatives: x402engine ElevenLabs Text-to-Speech ($0.02) and Google Gemini 3.1 Flash TTS ($0.0028).
Agents call it through Zero, which pays per call: no API key and no wallet of your own. New accounts start with $5. Live alternatives for the same use case: x402engine ElevenLabs Text-to-Speech ($0.02) · Google Gemini 3.1 Flash TTS ($0.0028).
Transcribes audio to text using streaming ASR, accepting linear16 PCM audio via GET request and returning turn-based speech events with transcripts
Price / call$0.098
Success—
StatusUnknown
How this service works
x402 workers ai. pay with usdc on base, polygon, arbitrum, world, or solana. no api keys.
Output
A JSON object containing a TurnInfo event with fields: type ('TurnInfo'), event (e.g. 'SpeechStarted'), and transcript (the recognized text string from the audio input).
Example use cases
Real-time call transcription for support agents
“Can you listen to this customer call recording and transcribe what they're saying so I can see the conversation text in real time?”
Voice memo to text conversion
“I've got a voice memo in PCM audio format—can you turn it into readable text for me?”
Live meeting transcript generation
“Transcribe this audio stream from our team meeting as it's happening and give me the speaker's words as text.”
Technical details
Endpoint
GEThttps://media.gedx402.com/v1/asr/flux?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need keyless, pay-per-use speech-to-text transcription using USDC on-chain payment (Base, Polygon, Arbitrum, World, or Solana) without managing API credentials. Ideal for agents that handle linear16 PCM audio and need real-time turn-based transcription events via x402 micropayment protocol.
Side effects
- Missing required 'encoding' query parameter returns error
- Missing required 'sample_rate' query parameter returns error
- Unsupported encoding type other than 'linear16' rejected
- Invalid sample_rate format (non-numeric) rejected
- Payment not completed or insufficient USDC balance returns 402
- Audio stream too short or empty may return empty transcript
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"type": "TurnInfo",
"event": "SpeechStarted",
"transcript": "Hello"
}
}Tags
x402
Reviews
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