# Omnicall Speech-to-Text Transcription (Whisper)

> Omnicall Speech-to-Text Transcription (Whisper) is a paid API for AI agents from omnicall.gocreativeai.com, paid per call via x402, $0.04/call, status unknown (last checked 2026-09-15).

Transcribes audio or video from any URL into text using OpenAI Whisper, with no API key required — pay per call via x402.

## Facts

- Endpoint: GET https://omnicall.gocreativeai.com/v1/ai/transcribe/https://f.stableupload.dev/ejh2w63pec/posit.wav
- Price: $0.04/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/omnicall-speech-to-text-transcription-whisper-4334f9cf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5Z7ALzbjXmXzNcPCzIJxN

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 omnicall-speech-to-text-transcription-whisper-4334f9cf
```

Example prompt: Transcribe the audio from this URL for me: https://f.stableupload.dev/ejh2w63pec/posit.wav — I need the full spoken text.

## When to prefer this

Choose this endpoint when you need quick, keyless speech-to-text transcription from a publicly accessible audio or video URL, especially in agentic workflows where managing API keys is impractical. It is ideal for one-off or infrequent transcription tasks billed per call at $0.04 USDC, avoiding the overhead of setting up and paying for a dedicated Whisper API subscription. Best for podcasts, call recordings, meeting audio, and voice notes accessible via URL.

## Known failure modes

- Invalid or inaccessible media URL — endpoint cannot fetch the file
- Unsupported audio/video format — Whisper cannot process the codec
- Network timeout if the media file is very large or slow to retrieve
- Payment failure via x402 protocol — transaction not completed
- Empty audio or silence-only file — returns empty or minimal transcript

## How this service works

Transcribe — speech-to-text from any audio/video URL (Whisper) in ONE call. Keyless pay-per-call for agents reading podcasts, calls, meetings, and voice notes.

## Output

A plain-text transcript of the spoken content in the provided audio or video file, generated by OpenAI Whisper via a single GET call to the Omnicall gateway. The agent receives the full transcription as a text string with no additional metadata unless specified.

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "input"
     ],
     "properties": {
      "input": {
       "type": "string",
       "description": "endpoint argument"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/omnicall-speech-to-text-transcription-whisper-4334f9cf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from omnicall.gocreativeai.com](https://www.zero.xyz/host/omnicall.gocreativeai.com/llms.txt)