I built a Screenshot & Metadata API that extracts 50+ fields from any URL

DarkPancakes — Fri, 13 Mar 2026 12:41:18 +0000

I built a Screenshot/PDF API that does more than just screenshots. The metadata endpoint extracts 50+ fields from any URL — OG tags, Twitter Card, JSON-LD, content analysis, and more.

What it does

URL to Screenshot — capture any webpage as PNG, JPEG, or WebP
URL to PDF — generate PDFs with custom format, margins, orientation
Metadata Extraction — 50+ fields from any URL (see below)
HTML to Image — render custom HTML/CSS to PNG/JPEG/WebP

The Metadata Endpoint

This is what makes it different. A single GET request extracts:

Basic SEO:
title, description, keywords, author, language, charset, viewport, robots, canonical URL, generator

Open Graph:
og:title, og:description, og:image (+ dimensions), og:url, og:type, og:site_name, og:locale

Twitter Card:
card type, title, description, image, @site, @creator

Icons & Theme:
favicon, apple-touch-icon, manifest, theme-color, color-scheme

Content Analysis:
first h1 text, h2 count, internal links count, external links count, images count, images without alt text, forms count, scripts count, stylesheets count, word count

Structured Data:
JSON-LD (Schema.org) parsed and returned

Feeds:
RSS/Atom feeds auto-detected

Raw dump:
All meta tags as key-value pairs

Quick Start (Python)

import requests

headers = {
    "X-RapidAPI-Key": "YOUR_KEY",
    "X-RapidAPI-Host": "screenshot-pdf-api.p.rapidapi.com"
}

# Screenshot a website
response = requests.get(
    "https://screenshot-pdf-api.p.rapidapi.com/v1/screenshot",
    headers=headers,
    params={"url": "https://github.com", "width": 1280, "format": "png"}
)

with open("screenshot.png", "wb") as f:
    f.write(response.content)

print(f"Saved {len(response.content)} bytes")

Quick Start (JavaScript)

// Screenshot
const response = await fetch(
  "https://screenshot-pdf-api.p.rapidapi.com/v1/screenshot?url=https://github.com&format=png",
  {
    headers: {
      "X-RapidAPI-Key": "YOUR_KEY",
      "X-RapidAPI-Host": "screenshot-pdf-api.p.rapidapi.com"
    }
  }
);
const blob = await response.blob();

// Metadata
const meta = await fetch(
  "https://screenshot-pdf-api.p.rapidapi.com/v1/metadata?url=https://github.com",
  {
    headers: {
      "X-RapidAPI-Key": "YOUR_KEY",
      "X-RapidAPI-Host": "screenshot-pdf-api.p.rapidapi.com"
    }
  }
);
const data = await meta.json();
console.log(data.data.title); // "GitHub · Build and ship software..."
console.log(data.data.og_image); // "https://..."
console.log(data.data.word_count); // 834

cURL

# Screenshot
curl -o screenshot.png \
  -H "X-RapidAPI-Key: YOUR_KEY" \
  -H "X-RapidAPI-Host: screenshot-pdf-api.p.rapidapi.com" \
  "https://screenshot-pdf-api.p.rapidapi.com/v1/screenshot?url=https://github.com"

# Full page capture
curl -o fullpage.png \
  -H "X-RapidAPI-Key: YOUR_KEY" \
  -H "X-RapidAPI-Host: screenshot-pdf-api.p.rapidapi.com" \
  "https://screenshot-pdf-api.p.rapidapi.com/v1/screenshot?url=https://en.wikipedia.org&full_page=true"

Endpoints

Endpoint	Description	Tier
GET /v1/screenshot	Screenshot URL to PNG/JPEG/WebP	Free
GET /v1/health	API status & queue depth	Free
GET /v1/pdf	Generate PDF from URL	Basic
GET /v1/metadata	Extract 50+ metadata fields	Basic
POST /v1/screenshot/html	Render HTML/CSS to image	Pro

Screenshot Parameters

Param	Default	Description
url	required	URL to capture
width	1280	Viewport width
height	800	Viewport height
format	png	png, jpeg, webp
quality	85	JPEG/WebP quality (1-100)
full_page	false	Capture entire scrollable page
delay	0	Wait N seconds before capture (0-5)
selector	null	CSS selector to capture specific element

Use Cases

Social media previews — generate Open Graph images
PDF reports — convert dashboards and pages to PDF
Web scraping — screenshot + metadata in one call
Thumbnails — generate website thumbnails at scale
SEO auditing — check OG tags, missing alt text, structured data
Link previews — build rich preview cards
Visual regression testing — automated screenshots for QA

Pricing vs Competitors

Feature	This API	ScreenshotOne	URLBox
Free tier	20/day	100 one-time	None
Basic plan	$9/mo	$17/mo	$19/mo
Metadata extraction	50+ fields	No	No
JSON-LD parsing	Yes	No	No
Content analysis	Yes	No	No

Try it

Screenshot & PDF API on RapidAPI

Postman Collection

Built with FastAPI + Playwright (headless Chromium). Hosted on a Hetzner VPS.

What other metadata fields would be useful to extract? Let me know in the comments!

Free Prediction Market Data API — Real-Time Polymarket Odds, Signals & Sentiment from 28+ Sources

DarkPancakes — Fri, 13 Mar 2026 12:40:38 +0000

Ever wanted real-time prediction market data without scraping? I built Sirius API — a free REST API that gives you live Polymarket odds, algorithmic trading signals, sentiment analysis, and more.

What you get (Free tier)

Live markets — all active Polymarket markets with current odds
Trading signals — 2,500+ signals/day from 6 detection layers (15-min delay on Free)
Sentiment analysis — crypto Fear & Greed index, long/short ratios
Sports odds — NBA, NFL, NHL, NCAA, soccer from ESPN + Kalshi
Weather forecasts — NOAA data matched to prediction markets
Cross-platform comparison — Polymarket vs Kalshi vs PredictIt odds

Data Sources (28+)

Polymarket, Kalshi, PredictIt, Manifold Markets, ESPN, The Odds API, NOAA, NHC, USGS, FRED, GDELT, FiveThirtyEight, Congress.gov, OpenFDA, Sleeper, Eurovision, Spotify Charts, TMDB, Google Trends, CourtListener, DOJ, Federal Register, Finnhub, and more.

Quick start (Python)

import requests

headers = {
    "X-RapidAPI-Key": "YOUR_KEY",
    "X-RapidAPI-Host": "sirius-prediction-market-api.p.rapidapi.com"
}

# Get trading signals
signals = requests.get(
    "https://sirius-prediction-market-api.p.rapidapi.com/v1/signals",
    headers=headers
).json()

print(f"Found {signals['data']['count']} signals")
print(f"Total stored: {signals['data']['total_stored']}")

for s in signals["data"]["signals"][:5]:
    print(f"  {s['side']} {s['market'][:50]} — gap: {s['gap_pct']}%")

Quick start (JavaScript)

const response = await fetch(
  "https://sirius-prediction-market-api.p.rapidapi.com/v1/signals",
  {
    headers: {
      "X-RapidAPI-Key": "YOUR_KEY",
      "X-RapidAPI-Host": "sirius-prediction-market-api.p.rapidapi.com"
    }
  }
);
const { data } = await response.json();
console.log(`${data.count} signals from ${data.sources_active} sources`);

Endpoints

Endpoint	Description	Tier
GET /v1/markets	All active markets + odds	Free
GET /v1/signals	Trading signals from 28+ sources	Free (15min delay)
GET /v1/signals/history	Historical signals + results	Free
GET /v1/sentiment	Fear & Greed, long/short ratios	Free
GET /v1/sports	Live sports odds	Free
GET /v1/weather	Weather forecasts	Free
GET /v1/odds	Cross-platform odds comparison	Free
GET /v1/performance	Bot track record & win rate	Basic
GET /v1/trades	Trade history with P&L	Basic
GET /v1/brain	AI reasoning engine	Pro

Signal Detection Layers

The API exposes signals from 6 algorithmic detection layers that scan continuously:

L1 — Price Lag: Black-Scholes model vs Polymarket odds on crypto markets
L3 — Weather: NOAA/NHC/USGS data matched to weather prediction markets
L4 — Kalshi: Cross-platform arbitrage between Kalshi and Polymarket
L5 — Sports & Politics: ESPN live scores + Kalshi political predictions
L6 — Universal: 20+ sources including PredictIt, Manifold, Odds API, FRED, GDELT, Google Trends, and more

Pricing

Plan	Price	Requests/day	Signal Delay
Free	$0	50	15 min
Basic	$9/mo	1,000	5 min
Pro	$29/mo	5,000	2 min

Use Cases

Trading bots — automated prediction market trading
Dashboards — real-time odds monitoring
Research — prediction market data analysis
Backtesting — historical signal data
Arbitrage detection — cross-platform odds comparison

Try it

Sirius Prediction Market API on RapidAPI

Postman Collection

Built with FastAPI + Python, running 24/7 on a Hetzner VPS. Data updates every 2 minutes.

Questions? Drop a comment below!

DEV Community: DarkPancakes

I built a Screenshot & Metadata API that extracts 50+ fields from any URL

What it does

The Metadata Endpoint

Quick Start (Python)

Quick Start (JavaScript)

cURL

Endpoints

Screenshot Parameters

Use Cases

Pricing vs Competitors

Try it

Free Prediction Market Data API — Real-Time Polymarket Odds, Signals & Sentiment from 28+ Sources

What you get (Free tier)

Data Sources (28+)

Quick start (Python)

Quick start (JavaScript)

Endpoints

Signal Detection Layers

Pricing

Use Cases

Try it