# Transcript+ Audio/Video Transcription API

> Transcript+ Audio/Video Transcription API is a paid API for AI agents from seenly-transcript-plus.vercel.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-19).

Converts audio or video (URL or uploaded file) into a speaker-labelled diarized transcript, summary, chapter markers, and SRT/VTT captions

## Facts

- Endpoint: POST https://seenly-transcript-plus.vercel.app/api/transcribe?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 1
- Tags: x402
- Canonical page: https://www.zero.xyz/c/transcript-audio-video-transcription-api-b3ecbb6a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yUnwz3iTZGBMr1yGtSCdg

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 transcript-audio-video-transcription-api-b3ecbb6a -d '<json body>'
```

Example prompt: Transcribe this podcast episode for me — https://example.com/podcast.mp3 — with speaker labels and a summary, and give me the output as SRT captions too.

## When to prefer this

Choose this endpoint when you need speaker-attributed (diarized) transcripts alongside summaries and chapter markers in a single call, especially for meetings, interviews, or podcasts. It accepts both remote URLs (up to 100 MB / 60 min) and small inline file uploads and outputs multiple formats (JSON, SRT, VTT, text) in one request. Prefer it over bare transcription APIs when you need the full package — diarization, summary, and captions — without chaining multiple services.

## Known failure modes

- Audio/video file exceeds 100 MB or 60-minute limit — request rejected before payment
- Inline base64 file exceeds 4 MB limit — request rejected
- maxMinutes guard triggers if audio is longer than specified — rejected before payment
- Unsupported audio/video format or corrupted file — transcription fails
- Public URL unreachable or requires authentication — download fails
- Language hint not recognized — may fall back to auto-detection with reduced accuracy
- x402 payment not completed — endpoint returns 402 and transcription does not proceed

## How this service works

Transcript+: audio/video URL or upload to a speaker-labelled (diarized) transcript, summary, chapters and SRT/VTT captions. Priced per audio minute.

## Output

Returns a structured JSON object (or SRT/VTT/text depending on format parameter) containing the full speaker-labelled transcript with timestamps, a prose summary of the content, timestamped chapter markers, and optionally SRT or VTT caption blocks ready for upload to video platforms.

## 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": {
     "type": "object",
     "properties": {
      "url": {
       "type": "string",
       "description": "Public http(s) URL of an audio or video file (max 100 MB, 60 min)."
      },
      "file": {
       "type": "object",
       "properties": {
        "base64": {
         "type": "string"
        },
        "filename": {
         "type": "string"
        }
       },
       "description": "Inline file instead of url (max 4 MB)."
      },
      "format": {
       "enum": [
        "json",
        "srt",
        "vtt",
        "text"
       ],
       "type": "string",
       "default": "json"
      },
      "diarize": {
       "type": "boolean",
       "default": true
      },
      "summary": {
       "type": "boolean",
       "default": true
      },
      "language": {
       "type": "string",
       "description": "Optional locale hint, e.g. en-US"
      },
      "maxMinutes": {
       "type": "integer",
       "description": "Refuse (before payment) if the audio is longer."
      }
     }
    },
    "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"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/transcript-audio-video-transcription-api-b3ecbb6a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from seenly-transcript-plus.vercel.app](https://www.zero.xyz/host/seenly-transcript-plus.vercel.app/llms.txt)