These are genuinely different tools for different jobs. Transcript APIs (TranscriptAPI, Supadata, and others) are on-demand lookup services — great when you already have a video URL and just need the text. VidProxy is a channel monitoring platform — it watches for new videos and pushes transcripts to your app automatically. Here's an honest breakdown of both so you can pick the right one.
REST APIs that return a transcript for a video ID you provide. You call them when you need a transcript — they have no concept of channels, monitoring, or automatic delivery. You build the rest.
A monitoring platform that watches YouTube channels and automatically delivers full transcripts to your webhook when new videos publish. On-demand lookup is also available for one-off needs.
Transcript APIs are stateless lookup services. You give them a video ID, they return a transcript. That's the entire job. They're well-suited for: browser extensions where a user pastes a URL, one-off analysis scripts, tools where a user triggers the lookup explicitly, or any workflow where you already know which video you want.
VidProxy is a channel monitoring platform. You subscribe to YouTube channels, and VidProxy detects new videos, fetches the transcript, and delivers everything to your webhook — automatically. The use case is different: reacting to new content as it publishes, not looking up specific videos on demand.
If your goal is a pipeline that reacts to new videos — competitor monitoring, an AI knowledge base, a newsletter digest — a transcript API is only part of what you need. You still have to: detect when new videos publish (polling YouTube RSS or the YouTube Data API), trigger the transcript lookup, handle availability delays (captions can take minutes to hours to appear after a video publishes), retry on failure, store results, and route the data into your app. That's significant infrastructure before any business logic.
VidProxy handles all of that. But if you don't need monitoring — if you just need text for a video you already have — a transcript API is the simpler tool.
YouTube doesn't make auto-generated captions available immediately. They typically appear 5 minutes to a few hours after a video publishes. A transcript API call right after detection often returns empty, requiring retry logic you have to build.
VidProxy's hold-and-retry system handles this automatically — it retries on a widening backoff for up to 24 hours and delivers exactly once when the transcript is ready.
Sometimes you have a specific video URL and just need the transcript, outside of any channel subscription. VidProxy's GET /api/transcript endpoint does exactly that — pass a video ID or YouTube URL, get back the transcript with timestamps. It's included in every paid plan with a monthly credit limit.
This means VidProxy can cover both cases: automated monitoring of channels and one-off lookups. But if you only need on-demand lookups, a dedicated transcript API may be cheaper.
| Capability | TranscriptAPI & similar | VidProxy |
|---|---|---|
| Transcript Retrieval | ||
| On-demand transcript by video ID | ✓ Core feature | ✓ Included on paid plans |
| On-demand transcript by YouTube URL | ✓ Most services | ✓ |
| Timestamped caption segments | ✓ | ✓ |
| Multi-language transcript support | ✓ Some services | ✓ Where available on YouTube |
| AI-generated summary + key takeaways | ✕ | ✓ Pro / Agency |
| Channel Monitoring & Delivery | ||
| Watch channels for new videos automatically | ✕ You build this | ✓ Core feature |
| Webhook push when a new video publishes | ✕ | ✓ |
| Webhook payload includes full transcript | ✕ | ✓ |
| Hold & retry until transcript is ready | ✕ You build this | ✓ Up to 24h automatic |
| Pull API — query stored transcripts by time window | ✕ | ✓ |
| Keyword alerts — fire only when transcript matches | ✕ | ✓ Pro / Agency |
| Multiple webhook endpoints per channel | ✕ | ✓ |
| Integration & Automation | ||
| Works with n8n, Make, Zapier via webhook | ✕ Requires polling setup | ✓ Native push, zero config |
| Tag subscriptions for filtering in pull API | ✕ | ✓ |
| Pricing & Limits | ||
| Free tier | ✓ Limited credits | ✓ 1 channel, 10 on-demand lookups/mo |
| Pricing model | Per-request or credit bundles | Flat monthly subscription |
| Predictable cost at scale | Grows with volume | ✓ Fixed monthly rate |
A transcript API doesn't try to monitor channels. VidProxy doesn't try to be the cheapest per-request transcript lookup. The overlap is in on-demand fetching, where VidProxy's credit-based endpoint is a reasonable option if you're already using it for monitoring — but if all you need is raw transcript lookups at volume, a dedicated transcript API will likely cost less.
Most channel-monitoring pipelines will reach for VidProxy. Most user-triggered transcript tools will reach for a dedicated API. Both are legitimate choices depending on what you're building.
GET /api/transcript?url=... (or ?video_id=...) returns the full transcript plus timestamped segments for any public YouTube video, with no subscription involved. Same one-call shape a transcript API gives you. The monthly quota is 10 lookups on Free, 500 on Starter, 2,500 on Pro and 10,000 on Agency, and a lookup that comes back empty is not charged.
Subscribe to channels, get transcripts delivered to your webhook automatically. Free tier, no credit card.
No credit card · Free tier forever