> ## Documentation Index
> Fetch the complete documentation index at: https://docs.perceptlayer.com/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> Perceptlayer is a web data API: one key for structured JSON from about 250 websites. Base URL https://api.perceptlayer.com.
> Send the key in the X-API-Key header. GET parameters go in the query string; POST parameters in a JSON body.
> A successful call costs the credits on its endpoint (X-Credits-Used); failed calls cost nothing. Errors are {"error": {"code", "message", "request_id"}}.
> AI agents can use every endpoint through the MCP server at https://api.perceptlayer.com/mcp (tools search_endpoints, get_endpoint, call_endpoint), with Authorization: Bearer <key>.
> Get a free key at https://perceptlayer.com/signup.

# Web and SEO

> 7 sources and 35 endpoints, including Domain Availability, Google Ads Transparency, Impressum Extraction, North Data.

Pick a source to open its first endpoint; the sidebar lists the rest. Each card shows how many endpoints the source has and the credits a successful call costs.

> **[Domain Availability](https://docs.perceptlayer.com/api-reference/domain-availability/domains-availability.md)**
>
> 1 endpoint · 1 credit

> **[Google Ads Transparency](https://docs.perceptlayer.com/api-reference/google-ads-transparency/ad.md)**
>
> 3 endpoints · 1 credit

> **[Impressum Extraction](https://docs.perceptlayer.com/api-reference/impressum-extraction/web-scraper-impressum.md)**
>
> 1 endpoint · 1 credit

> **[North Data](https://docs.perceptlayer.com/api-reference/north-data/changes.md)**
>
> 11 endpoints · 1 credit · some need the terms

> **[Semrush](https://docs.perceptlayer.com/api-reference/semrush/content-blogpost.md)**
>
> 14 endpoints · 1 credit · some need the terms

> **[Similarweb](https://docs.perceptlayer.com/api-reference/similarweb/batches.md)**
>
> 4 endpoints · 1 credit · some need the terms

> **[Web Scraper](https://docs.perceptlayer.com/api-reference/web-scraper/scrape.md)**
>
> 1 endpoint · 1 credit


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