cnvrt.ing

cnvrt.ing is a universal media conversion and analysis service — convert, transcribe, and analyze media from over 1000 platforms including YouTube, TikTok, Instagram, Twitter, and more. Through the Obul proxy, each request is paid individually via x402 — no account or API key required. Supports audio, video, and image formats with AI-powered transcription and image analysis.

Authentication

All requests route through the Obul proxy. Include your Obul API key in every request:

{
  "headers": {
    "Content-Type": "application/json",
    "x-obul-api-key": "{{OBUL_API_KEY}}"
  }
}

Base URL: https://proxy.obul.ai/proxy/https/cnvrt.ing

To get an Obul API key, sign up at https://my.obul.ai.

Common Operations

Convert Media

Convert media from a URL to a different format. Supports 1000+ platforms including YouTube, TikTok, Instagram, Twitter, Facebook, Vimeo, Twitch, SoundCloud, Reddit, and more. Output formats include mp3, mp4, wav, aac, flac, ogg, m4a, mov, mkv, avi, webm, jpg, png, webp, gif, and bmp.

Pricing: $0.00 (free)

{
  "method": "POST",
  "url": "https://proxy.obul.ai/proxy/https/cnvrt.ing/api/convert",
  "headers": {
    "Content-Type": "application/json",
    "x-obul-api-key": "{{OBUL_API_KEY}}"
  },
  "body": {
    "url": "https://www.youtube.com/watch?v=VIDEO_ID",
    "format": "mp3",
    "quality": "best"
  }
}

Response: JSON object with the converted media file URL. Download the file from the returned URL.

Transcribe Audio or Video

Transcribe audio or video content to text using OpenAI Whisper with 95%+ accuracy. Provide a URL to any supported platform and receive a full text transcription.

Pricing: $0.025

{
  "method": "POST",
  "url": "https://proxy.obul.ai/proxy/https/cnvrt.ing/api/transcribe",
  "headers": {
    "Content-Type": "application/json",
    "x-obul-api-key": "{{OBUL_API_KEY}}"
  },
  "body": {
    "url": "https://www.youtube.com/watch?v=VIDEO_ID"
  }
}

Response: JSON object with the transcribed text content. Includes the full transcription of the audio or video.

Analyze Image (OCR and Object Detection)

Extract text via OCR and detect objects in images using GPT-4o Vision. Provide a URL to an image and receive structured analysis results.

Pricing: $0.005

{
  "method": "POST",
  "url": "https://proxy.obul.ai/proxy/https/cnvrt.ing/api/analyze-image",
  "headers": {
    "Content-Type": "application/json",
    "x-obul-api-key": "{{OBUL_API_KEY}}"
  },
  "body": {
    "url": "https://example.com/image.png"
  }
}

Response: JSON object containing extracted text (OCR) and detected objects from the image.

Detect Format

Identify the format and metadata of a media URL before converting. Useful for determining what formats are available and estimating conversion costs.

Pricing: $0.00 (free)

{
  "method": "POST",
  "url": "https://proxy.obul.ai/proxy/https/cnvrt.ing/api/detect-format",
  "headers": {
    "Content-Type": "application/json",
    "x-obul-api-key": "{{OBUL_API_KEY}}"
  },
  "body": {
    "url": "https://www.youtube.com/watch?v=VIDEO_ID"
  }
}

Response: JSON object with the detected format, resolution, duration, and other metadata about the media.

Estimate Cost

Pre-flight cost estimation for paid operations like transcription and image analysis. Check the price before committing to a paid request.

Pricing: $0.00 (free)

{
  "method": "POST",
  "url": "https://proxy.obul.ai/proxy/https/cnvrt.ing/api/estimate-cost",
  "headers": {
    "Content-Type": "application/json",
    "x-obul-api-key": "{{OBUL_API_KEY}}"
  },
  "body": {
    "url": "https://www.youtube.com/watch?v=VIDEO_ID",
    "operation": "transcribe"
  }
}

Response: JSON object with the estimated cost in USDC for the requested operation.

Endpoint Pricing Reference

Endpoint	Price	Purpose
POST /api/convert	$0.00	Convert media from 1000+ platforms to any format
POST /api/transcribe	$0.025	Transcribe audio/video to text via OpenAI Whisper
POST /api/analyze-image	$0.005	OCR and object detection via GPT-4o Vision
POST /api/detect-format	$0.00	Detect format and metadata of a media URL
POST /api/estimate-cost	$0.00	Estimate cost for a paid operation
POST /api/convertlive	$0.05	Real-time live stream analysis with transcription
POST /api/validate	$0.00	Pre-flight URL validation

When to Use

• Media downloading — Download and convert videos or audio from YouTube, TikTok, Instagram, Twitter, and 1000+ other platforms to common formats like mp3 or mp4.
• Transcription — Convert spoken content in videos or audio files to text with high accuracy, useful for meeting notes, podcast transcripts, or content indexing.
• Image analysis — Extract text from images via OCR or detect objects in photographs, screenshots, or documents.
• Format conversion — Convert between audio formats (mp3, wav, flac, aac), video formats (mp4, mkv, webm), or image formats (jpg, png, webp).
• Content research — Download and transcribe video content for research, summarization, or knowledge base building.

Best Practices

• Use detect-format first — Call /api/detect-format before converting to understand the source media's properties and available quality levels.
• Use estimate-cost for paid operations — Call /api/estimate-cost before transcription or image analysis to check pricing, especially for long media files.
• Choose the right quality — Set "quality": "best" for highest quality output, or omit for default quality which balances size and fidelity.
• Use convert for free downloads — The /api/convert endpoint is free, making it ideal for downloading media in common formats without cost.
• Prefer transcribe over manual extraction — For audio or video content, use the transcription endpoint rather than downloading and processing locally. The Whisper-based transcription is fast and accurate.

Error Handling

Error	Cause	Solution
402 Payment Required	Payment not processed or insufficient	Verify your OBUL_API_KEY is valid and your account has sufficient balance at my.obul.ai.
400 Bad Request	Missing or invalid request body	Ensure url is provided and is a valid, accessible URL. Check format is supported.
404 Not Found	URL content not found on platform	Verify the URL is correct and the content is still available on the source platform.
415 Unsupported Media	Format not supported for conversion	Check supported formats. Use /api/detect-format to see available options.
429 Too Many Requests	Rate limit exceeded	Add a short delay between requests. Avoid rapid-fire conversion calls.
500 Internal Server Error	Upstream service issue	Wait a few seconds and retry. If persistent, the service may be experiencing downtime.
504 Gateway Timeout	Media processing took too long	The source file may be too large. Try a shorter clip or lower quality setting.