Website Tech Stack Detector

Web & SEO Tools

Operated by Sourcelane✓ verified

Detects and catalogs the technology stack of websites from a list of domains, producing per-site technology fingerprints. The connector analyzes homepage HTML, HTTP response headers, and DNS records to identify CMS and ecommerce platforms, JavaScript frameworks, analytics and tag managers, marketing and payment tools, fonts, CDN and hosting providers, web server and server headers, inferred email provider (from MX records), DNS records (A, MX, NS with primary IP), page title, final resolved URL, and HTTP status. Outputs include categorized lists of detected technologies and a de-duplicated aggregate of all technologies found for each domain.

Verified Sep 28, 12:10 AM

$0.003

per domain

Up to 100 per call. Only pay for results returned; failed calls are refunded.

What people use it for

Lead qualification and enrichment by scoring prospects on the tools they run (e.g., find sites using a specific platform)
Competitive intelligence to inventory competitors’ analytics, payment, and marketing stacks
Sales prospecting for building target lists of sites running platforms you integrate with
Technology due diligence to generate quick tech snapshots for a portfolio of domains
Email-provider segmentation to split domain lists by email hosting provider (e.g., Google Workspace vs Microsoft 365)

Trust & reliability

7d uptime trend

Window	Uptime	Success rate	p50	p95
24h	—	—	—	—
7d	—	—	—	—
30d	—	—	—	—

Calling contract

Call it through Sourcelane's gateway or MCP server. We run the connector, apply your agent's spend guardrails, and bill only the results returned.

Call it via Sourcelane

curl -X POST https://cool-puffin-608.convex.site/v1/call \
  -H "Authorization: Bearer sl_live_your_agent_key" \
  -H "Content-Type: application/json" \
  -d '{"listing":"website-tech-stack-detector","params":{"maxItems":5},"maxResults":10}'

Request params

Field	Type	Required	Description
`maxItems`	integer	optional	Maximum number of domains to analyze. 0 = analyze all domains in the list. Capped at 100 per call.

Each result contains

Field	Type	Description
`input`	string	Input
`domain`	string	Domain
`finalUrl`	string	Final Url
`statusCode`	integer	Status Code
`ipAddress`	string	Ip Address
`server`	string	Server
`poweredBy`	null	Powered By
`cdn`	string	Cdn
`emailProvider`	string	Email Provider
`technologies`	object	—
`technologiesFlat`	array	Technologies Flat
`mxRecords`	array	Mx Records
`nsRecords`	array	Ns Records
`aRecords`	array	—
`title`	string	—
`error`	null	—

Use Website Tech Stack Detector from Claude, ChatGPT or Cursor

Pick your tool and connect in under a minute. Then just ask — for example: “For these 50 domains, find contact emails and what e-commerce platform they run on.”

Connect Claude

Web, desktop and mobile. Paste one URL.

1Copy your personal connector URL
2In Claude open Settings → Connectors → Add custom connector
3Paste the URL and click Add — done

Manual setup (config files, REST, Python) +

Claude Code

Adds the Sourcelane MCP server with your key as a header.

terminal

claude mcp add --transport http sourcelane https://cool-puffin-608.convex.site/mcp \
  --header "Authorization: Bearer sl_live_your_agent_key"

Claude Desktop (config file)

Alternative to the connector URL: add to claude_desktop_config.json, then restart Claude.

claude_desktop_config.json

{
  "mcpServers": {
    "sourcelane": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://cool-puffin-608.convex.site/mcp",
        "--header",
        "Authorization:${AUTH_HEADER}"
      ],
      "env": {
        "AUTH_HEADER": "Bearer sl_live_your_agent_key"
      }
    }
  }
}

Cursor & Windsurf

Add to ~/.cursor/mcp.json (or Windsurf's mcp_config.json).

mcp.json

{
  "mcpServers": {
    "sourcelane": {
      "url": "https://cool-puffin-608.convex.site/mcp",
      "headers": {
        "Authorization": "Bearer sl_live_your_agent_key"
      }
    }
  }
}

VS Code

Save as .vscode/mcp.json. VS Code prompts for your key once.

.vscode/mcp.json

{
  "servers": {
    "sourcelane": {
      "type": "http",
      "url": "https://cool-puffin-608.convex.site/mcp",
      "headers": {
        "Authorization": "Bearer ${input:sourcelane-key}"
      }
    }
  },
  "inputs": [
    {
      "type": "promptString",
      "id": "sourcelane-key",
      "description": "Sourcelane agent key",
      "password": true
    }
  ]
}

ChatGPT Custom GPT (Actions)

Create a GPT → Actions → Import from URL, then Authentication: API Key, Bearer.

OpenAPI schema URL

https://sourcelane-amber.vercel.app/openapi.json

REST

One POST. Pass maxResults to cap cost.

curl

curl -X POST https://cool-puffin-608.convex.site/v1/call \
  -H "Authorization: Bearer sl_live_your_agent_key" \
  -H "Content-Type: application/json" \
  -d '{"listing":"website-tech-stack-detector","params":{"maxItems":5},"maxResults":10}'

Python, LangChain, CrewAI, OpenAI Agents SDK…

Wrap the REST call as a tool, or point an MCP client at the endpoint.

python

import requests

res = requests.post(
    "https://cool-puffin-608.convex.site/v1/call",
    headers={"Authorization": "Bearer sl_live_your_agent_key"},
    json={
        "listing": "website-tech-stack-detector",
        "params": {"maxItems":5},
        "maxResults": 10,
    },
    timeout=300,
)
body = res.json()
print(body["receipt"]["chargedMicros"], "micro-USD for", body["receipt"]["results"], "results")
print(body["data"])

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