AI Content API

OverviewLink to Overview

CaptureKit’s AI Content API analyzes a webpage and returns AI-generated insights such as a summary, value proposition, key features, categories, use cases, and optionally contact signals (emails, phone numbers).

It’s built for workflows where you need fast, consistent content intelligence for competitive research, lead enrichment, content monitoring, and automation, without maintaining your own scraping + LLM pipeline.

API endpoint: https://api.capturekit.dev/v1/analyze

Typical use casesLink to Typical use cases

• Competitive research: summarize competitor landing pages and extract positioning/value propositions.
• Product intelligence: extract key features, categories, and common use cases from product pages.
• Lead enrichment: identify target audience and extract public emails / phone numbers when present.
• Content monitoring: track changes in messaging, features, and positioning over time.
• SEO & content ops: quickly classify pages and generate consistent summaries at scale.
• Custom AI analysis: inject your own fields and instructions via custom_response and custom_prompt.
• Geo / restricted pages: route requests through a proxy.

QuickstartLink to Quickstart

Send a request with url and your x-api-key.

Example request:

curl -L "https://api.capturekit.dev/v1/analyze?x-api-key=YOUR_KEY&url=https://tailwindcss.com"

ParametersLink to Parameters

RequiredLink to Required

• url (string, required)
  The URL of the webpage to analyze.

• x-api-key (string, required)
  Your API access key. Can be provided via the x-api-key query parameter, x-api-key header, or request body.

AI output customizationLink to AI output customization

• custom_response (object | string, optional)
  Add custom fields to be included in the AI response. You can provide it:

  • as a JSON object in the request body, or
  • as a JSON-stringified object in query parameters.

  Example:

  {
    "sentiment": "sentiment",
    "language": "language"
  }
  

• custom_prompt (string, optional)
  Add your own instructions to guide the AI’s analysis (tone, focus, constraints, etc.).

Routing / cachingLink to Routing / caching

• proxy (string, optional)
  Specify a proxy server to route your request through. Supports HTTP, HTTPS, and SOCKS5 proxies.
  Format: http://username:password@proxy.com:PORT.

• cache (boolean, optional, default: false)
  Cache the response.

• cache_ttl (number, optional, default: 2592000)
  Cache the response for a custom TTL (in seconds).
  Maximum 2592000 seconds (1 month), minimum 3600 seconds (1 hour).

Notes / limitsLink to Notes / limits

• AI outputs are probabilistic: results can vary slightly over time; store timestamps and consider caching for monitoring workflows.
• Custom fields: keep custom_response focused (few fields) for predictable outputs.
• Proxy usage: use proxy for geo-restricted pages or when rotating IPs is required.
• Caching: enable cache + cache_ttl for repeated audits/monitoring to reduce cost and latency.