A collection of ready-to-run examples and utilities for the BuiltWith API — helping you build smarter sales pipelines, enrich CRMs, and analyze the web's technology landscape.
Stream newly-detected domains in real time from the BuiltWith Live Feed WebSocket and pipe them straight into your stack.
| Example | Description | Languages |
|---|---|---|
| live-feed-to-slack | 💬 Stream newly detected domains into a Slack channel as they're discovered | Node.js, Python |
| live-feed-to-salesforce | ☁️ Stream live feed domains, enrich with Domain API profiles, and push mapped leads to Salesforce | Node.js, Python |
| live-feed-to-hubspot | 🟠 Stream live feed domains, enrich via Domain API, and upsert contacts directly into HubSpot CRM | Node.js, Python |
| live-feed-to-pipedrive | 🟢 Stream live feed domains, enrich via Domain API, and upsert organizations in Pipedrive with a tech-stack note | Node.js, Python |
Pull technology lists and enrich domains at scale — great for building targeted prospect lists and sales-ready exports.
| Example | Description | Languages |
|---|---|---|
| lists-api-to-csv-enriched | 📊 Pull a technology list, enrich each domain with tech stack and company metadata, and export a sales-ready CSV | Node.js, Python |
| list-of-websites-using-two-technologies | 🧩 Find websites that use one technology and also use required additional technologies with OTHERTECHS |
Node.js, Python |
| bulk-domain-api-async | ⚡ CLI wrapper for the async bulk Domain API — submit a batch, poll for completion, download results, and resume interrupted jobs | Node.js, Python |
| bulk-domain-enrichment | 🗂️ Enrich a CSV of domains with tech categories, spend score, and company metadata via the Free API or Domain API | Node.js, Python |
| keyword-search-to-live-high-spend | 💰 Search for sites by keyword, enrich with the Domain API, and filter to only live sites spending $1,000+/mo on web tech | Node.js, Python |
Fundamental building blocks for looking up domains, technologies, and companies.
| Example | Description | Languages |
|---|---|---|
| domain-api | 🌐 Look up the full technology stack and metadata for any domain | Node.js, Python |
| change-api | 🔄 Get technology additions and removals for domains | Node.js, Python |
| lists-api | 📝 Get lists of websites actively using a specific technology | Node.js, Python |
| free-api | 🆓 Get summary technology counts and group data for a domain | Node.js, Python |
| company-to-url-api | 🏢 Find domains associated with a company name | Node.js, Python |
Uncover hidden connections between websites, technologies, and social profiles.
| Example | Description | Languages |
|---|---|---|
| relationships-api | 🔗 Discover connections and relationships between websites | Node.js, Python |
| tags-api | 🏷️ Find domains related to IP addresses and site attributes | Node.js, Python |
| recommendations-api | 💡 Get technology recommendations based on what similar sites use | Node.js, Python |
| redirects-api | ↪️ Track live and historical domain redirects | Node.js, Python |
Analyze technology adoption over time and evaluate domain signals.
| Example | Description | Languages |
|---|---|---|
| trends-api | 📉 Analyze technology adoption trends and usage metrics over time | Node.js, Python |
| keywords-api | 🔑 Extract keywords and topics associated with a domain | Node.js, Python |
| product-api | 🛒 Find websites selling specific products | Node.js, Python |
| trust-api | 🛡️ Evaluate trust and fraud signals for a domain | Node.js, Python |
| vat-api | 🧾 Look up VAT, GST, and other company registration numbers for a domain | Node.js, Python |
| vat-types-api | 🧾 List all VAT registration types (no API key required) | Node.js, Python |
| mcp-registry-api | 🔌 Search and browse the BuiltWith MCP registry (v1) of discovered remote MCP servers (no API credits) | Node.js, Python |
| mcp-registry-v2-api | 🔌 Search and browse the BuiltWith MCP registry (v2), with per-endpoint auth flags and first/last detected dates (no API credits) | Node.js, Python |
Check your credentials, usage, and quota.
| Example | Description | Languages |
|---|---|---|
| whoami-api | 🪪 Verify API credentials and check your account status | Node.js, Python |
| usage-api | 📟 Check API usage and remaining quota | Node.js, Python |
Purchase and use BuiltWith API credits without a conventional API subscription.
| Example | Description | Languages |
|---|---|---|
| x402-payment | 💵 Buy a reusable BuiltWith credit package with USDC on Base via x402, then spend those credits on MCP domain lookups | Node.js |
- Get an API key — grab one at api.builtwith.com
- Pick an example — browse the sections above and navigate into the folder
- Follow the README — each example has its own setup instructions for both Node.js and Python
💡 Examples that require a BuiltWith API key read it from an environment variable—no hardcoded secrets needed. The x402 example purchases its own prepaid credits instead.
