MCP server

Ask Claude, Cursor or VS Code about the technologies behind 21.9M websites through the Model Context Protocol. A free account with a verified e-mail address is required.

Server URL

https://larger.io/mcp

Get started

Claude.ai and Claude Desktop

Settings → Connectors → Add custom connector, then paste https://larger.io/mcp.

Claude Code

claude mcp add --transport http larger https://larger.io/mcp

Cursor

~/.cursor/mcp.json

{
    "mcpServers": {
        "larger": {
            "url": "https://larger.io/mcp"
        }
    }
}

VS Code

.vscode/mcp.json

{
    "servers": {
        "larger": {
            "type": "http",
            "url": "https://larger.io/mcp"
        }
    }
}

Sign-in

1Add the configuration above to your MCP client.
2On first use, a browser window opens to sign in to your LargerIO account.
3Authorize the application and you're ready to go. The session persists across uses.

Tools

list-categories-tool

List all technology categories with their top technologies and domain counts.

list-technologies-tool

List technologies in a specific category with domain counts.

category_slug: : The category slug (e.g. "javascript-libraries", "cms", "ecommerce")

search-technologies-tool

Search technologies and categories by name. Returns matching categories with their matching technologies and domain counts.

query: : Search query to match against technology or category names (e.g. "wordpress", "analytics", "cms")

get-technology-tool

Get details about a technology including top domains using it, language distribution, and related technologies.

technology_slug: : The technology slug (e.g. "jquery", "react", "wordpress")
page: : Page number (1-5, default 1). Each page returns 25 domains.

lookup-domain-tool

Scan a domain to detect its technologies, language, emails, and metadata. mode=quick (default, 5 tokens) fetches the site over HTTP in a few seconds; mode=full (100 tokens, at most 1 a minute per account, shared with the REST API) also renders it in a browser to catch technologies injected by JavaScript. A result less than 6 hours old is reused for 1 token.

domain: : The domain to scan (e.g. "example.com", "https://shop.example.com")
mode: : quick (default) fetches over HTTP; full also renders the page in a browser

list-my-exports-tool

List your purchased data exports with their status, filters, and row counts.

get-export-tool

Get a page of a purchased lead list as CSV (domain, title, description, language, country, rank, page_rank, technology, version, first_detected, last_detected, technologies, emails, contact_page, last_scanned, ip). Use offset and limit (up to 500 rows; about 100 rows fit comfortably in a model's context) to page through it.

export_id: : The export ID from list-my-exports
offset: : Number of data rows to skip (default 0).
limit: : Rows to return (1-500, default 100).

Token costs

Operation	Tokens
Catalog	0
Technology details	1
Lookup, cached result	1
Quick lookup	5
Full lookup	100
Exports	0

Limits

2,000 tokens a month with a free verified account, shared by the REST API and the MCP server, reset on the 1st (UTC).

REST API: 60 requests a minute, 10 lookups a minute.
MCP server: 30 calls a minute, 3 lookups a minute.

Full lookups are limited to 1 a minute per account, shared by the REST API and the MCP server.

Errors

Rate limit exceeded — Too many calls in a minute. Wait a minute and try again.
Not enough API tokens left this month — The monthly allowance is spent. Check your usage under API keys.
This domain is flagged as dangerous — The domain is on a malware or phishing feed and is not scanned.
Failed to reach the crawler — The scan could not run. Try again in a moment.
403 Forbidden — Your e-mail address is not verified yet.