AI Website Analyzer API

The CaptureKit Analyze API reads a website and returns AI insights: summary, value proposition, features, categories, use cases and optional contact signals.

• Analyze (AI) API — AI Content API analyzes any webpage and returns AI insights summary, value proposition, features, categories, use cases, and optional contact signals.

Use it for lead enrichment, competitor intelligence, directories and sales research.

Endpoint	Request	Credits
Analyze (AI) API	GET /v1/analyze	1

Table of contents

• How it works
• Analyze (AI) API
• Code examples in other languages
• Use cases
• Why CaptureKit?
• FAQ
• Related repositories
• Support

How it works

1. Create a CaptureKit account and copy your API key from the dashboard.
2. Call https://api.capturekit.dev with the header x-api-key: YOUR_API_KEY.
3. Use the result in your app — no infrastructure to run.

export CAPTUREKIT_API_KEY="your-api-key"
pip install requests        # Python
# TypeScript: Node.js 18+ (native fetch), run with `npx tsx file.ts`

Analyze (AI) API

AI Content API analyzes any webpage and returns AI insights summary, value proposition, features, categories, use cases, and optional contact signals.

GET https://api.capturekit.dev/v1/analyze · 1 credit per request · API reference

Request parameters

Parameter	In	Type	Required	Description
url	query	string	✅	The URL of the webpage to capture.
custom_response	query	string	—	Pass custom response fields to be included in the AI response.
custom_prompt	query	string	—	Add your own instructions to guide the AI’s analysis.
proxy	query	string	—	Specify a proxy server to route your request through.
cache	query	boolean	—	Cache the response.
cache_ttl	query	number	—	Cache the response for a custom TTL (in seconds).

Python example

import os

import requests

API_KEY = os.environ["CAPTUREKIT_API_KEY"]
HEADERS = {"x-api-key": API_KEY}

response = requests.get(
    "https://api.capturekit.dev/v1/analyze",
    headers=HEADERS,
    params={
        "url": "https://github.com/seaweedfs/seaweedfs",
    },
    timeout=120,
)
response.raise_for_status()

data = response.json()
print(data)

TypeScript example

type AnalyzeAiApi = {
  data?: {
    emails?: string[];
    summary?: string;
    useCases?: string[];
    categories?: string[];
    keyFeatures?: string[];
    phoneNumbers?: string[];
    targetAudience?: string;
    valueProposition?: string;
  };
  success?: boolean;
};

const headers = { "x-api-key": process.env.CAPTUREKIT_API_KEY!, "Content-Type": "application/json" };

const params = new URLSearchParams({
  "url": "https://github.com/seaweedfs/seaweedfs",
});

const response = await fetch(`https://api.capturekit.dev/v1/analyze?${params}`, { headers });
if (!response.ok) throw new Error(`HTTP ${response.status}: ${await response.text()}`);

const data = (await response.json()) as AnalyzeAiApi;
console.log(data);

Output example

Example response from the API reference, abridged.

{
  "data": {
    "emails": [
      "admin@company.com"
    ],
    "summary": "Tailwind CSS is a utility-first CSS framework for modern web design.",
    "useCases": [
      "Building websites",
      "Customizing themes"
    ],
    "categories": [
      "Web Development",
      "CSS Frameworks"
    ],
    "keyFeatures": [
      "Responsive design",
      "Dark mode"
    ],
    "phoneNumbers": [
      "+13322767084"
    ],
    "targetAudience": "Web developers and designers.",
    "valueProposition": "A flexible CSS framework packed with utility classes."
  },
  "success": true
}

Response fields

Field	Type	Description
data	object
data.emails	string[]
data.summary	string
data.useCases	string[]
data.categories	string[]
data.keyFeatures	string[]
data.phoneNumbers	string[]
data.targetAudience	string
data.valueProposition	string
success	boolean

Code examples in other languages

Ready-to-run examples live in examples/; each reads your key from CAPTUREKIT_API_KEY.

Language	analyze
cURL (Bash)	analyze.sh
PHP	analyze.php
C#	Analyze.cs
Go	analyze.go
Java	AnalyzeExample.java
Ruby	analyze.rb
Node.js	analyze.mjs

Use cases

• Lead enrichment — Qualify companies from their website.
• Competitor intelligence — Summarise competitors' positioning at scale.

Why CaptureKit?

• Screenshots as a service — the response body is the image or PDF; save it or upload it straight to your S3 bucket.
• Pixel-perfect options — full page, viewport size, scale factor, element selector, 18 mobile/tablet devices, delays and wait conditions.
• Clean pages — remove cookie banners, ads and any CSS selector before capturing.
• Beyond screenshots — extract content (metadata, links, HTML, Markdown) or get an AI analysis of any page.
• Copy-paste examples — Python and TypeScript in each README, 7 more languages in examples/.

FAQ

How do I authenticate?

Create an account on CaptureKit, copy your API key and send it in the x-api-key header of every request to https://api.capturekit.dev.

How much does a request cost?

Credits per call: /v1/analyze 1. See CaptureKit pricing.

Which languages are supported?

Any language that can make an HTTP request. This README shows Python and TypeScript; the examples/ folder contains cURL, PHP, C#, Go, Java, Ruby and Node.js.

Related repositories

• Screenshot API
• Full Page Screenshot API
• Website to PDF API
• Mobile Screenshot API
• Website Content API
• Website Crawler API
• All CaptureKit repositories

Support

• 💬 Join the Discord to ask questions and share what you build.
• 📚 Read the API reference.
• 🔑 Get your API key.

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_{Built by CaptureKit. Examples are released under the MIT license.}