<\!DOCTYPE html> Substrata — 501 Building Products API | Specs, Pricing, Carbon Data <\!-- Show HN / social sharing OG tags -->
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501 products · 12 categories · 201 manufacturers

Search 501 building
materials instantly.

Specs, pricing, and carbon data for windows, doors, insulation and more. Free API — no credit card, no sales call.

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Products
Categories
Manufacturers
ENERGY STAR
Daily
Updated
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Live Demo Search the database — no signup required
GET /v1/products
Run a search above to see the live API response...
{
  "data": [
    { "name": "...", "u_value": 0.30, "price_min_usd": 450 },
    ...
  ],
  "pagination": { "total": 501, "limit": 5 }
}
                
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before
// The old way
1. Google "Andersen 400 series specs"
2. Download 47-page PDF catalog
3. Find page 23, table 4
4. Copy values into spreadsheet
5. Repeat for 200 more products
6. Data is stale by next quarter

// Time: 3 days
// Accuracy: questionable
after
GET /v1/products?category=windows
    &manufacturer=andersen&max_u_value=0.30

{
  "data": [{
    "name": "Andersen 400 Series Casement",
    "u_value": 0.30,
    "shgc": 0.27,
    "price_min_usd": 450
  }, ...]
}
<\!-- How it works -->
How it works
01

We ingest the mess

Manufacturer catalogs, spec sheets, pricing tables, government databases. We crawl, parse, and structure data from sources that were never designed to be queried.

02

AI structures it

LLMs extract attributes, normalize units, reconcile conflicts, and produce clean, typed data. Every record traceable to its source document.

03

You query it

Clean REST API. Filterable by performance specs, material, price, certifications. Drop it into your construction software, procurement tool, AI agent, or estimating workflow.

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Ready to get started?

Get your free API key and start building. No credit card, no sales call.

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<\!-- Endpoints -->
API endpoints
<\!-- Query params -->
Query parameters

Filter, search, and sort on /v1/products

q
Full-text search across names, descriptions, manufacturers
q=triple+pane+casement
category
Filter by product category
windows | doors | insulation
manufacturer
Partial match on manufacturer name
andersen, marvin, rockwool
subcategory
Product subcategory filter
casement, entry, spray-foam
max_u_value
Maximum thermal transmittance (W/m²K)
max_u_value=0.25
min_r_value
Minimum thermal resistance (m²K/W)
min_r_value=15
energy_star
ENERGY STAR certified products only
true | false
max_price
Maximum price range filter (USD)
max_price=1000
frame_material
Filter by frame material (partial match)
vinyl, fiberglass, wood, aluminum
glazing_type
Filter by glazing type
triple, double, laminated
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Every industry has data that's hard to find. We make it queryable.

Substrata is the data infrastructure layer for industries the internet forgot to index. Starting with construction.

Explore the API first →

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