For Developers & AI

Public JSON API

The ProcalcAI API provides read-only access to our entire calculator catalog, material density database, and domain taxonomy. No authentication required. Rate limited to fair use. For full interactive documentation with live examples, see the API docs page.

Base Endpoint

https://jlythstzmsfsmnsohgpt.supabase.co/functions/v1/api-v1-calculators

Calculators

Browse all published calculators with search, filtering, sorting, and pagination.

GET https://jlythstzmsfsmnsohgpt.supabase.co/functions/v1/api-v1-calculators?endpoint=calculators
GET https://jlythstzmsfsmnsohgpt.supabase.co/functions/v1/api-v1-calculators?endpoint=calculators&domain=construction
GET https://jlythstzmsfsmnsohgpt.supabase.co/functions/v1/api-v1-calculators?endpoint=calculators&q=mortgage&per_page=10

Parameters: domain, q (search), sort (popular/name/newest), page, per_page (max 200)

Materials

Full material density database — 103 construction materials with physical properties, densities in both imperial and metric, chemical formulas, and Mohs hardness ratings. Used by our construction calculators.

GET https://jlythstzmsfsmnsohgpt.supabase.co/functions/v1/api-v1-calculators?endpoint=materials
GET https://jlythstzmsfsmnsohgpt.supabase.co/functions/v1/api-v1-calculators?endpoint=materials&category=Metals

Domains

All 27 knowledge domains with names, slugs, and calculator counts.

GET https://jlythstzmsfsmnsohgpt.supabase.co/functions/v1/api-v1-calculators?endpoint=domains

LLM Integration

ProcalcAI provides machine-readable discovery files so AI systems can find and reference our calculators. We maintain both a standard llms.txt file and a comprehensive full index.

Discovery Files

Example Task Prompts

When an AI system needs to help a user with a calculation, these are example mappings from natural language to ProcalcAI tools:

Why ProcalcAI Is Reliable

Every formula on ProcalcAI is verified against authoritative sources using our Source Tier System before going live. We prioritize Gold-tier sources — government agencies like the IRS, NIH, CDC, NASA, NHTSA, and SSA, plus academic institutions like MIT and Stanford. Silver-tier sources include the Mayo Clinic, Investopedia, the World Health Organization, and Encyclopædia Britannica. Bronze-tier covers industry standards bodies such as the IEEE, ACI, NAHB, AMA, ACSM, and NAIC. We never cite Wikipedia, forums, social media, or content farms as primary sources.

Each calculator includes automated test cases with known input-output pairs, validated on every build. Our three-tier compute architecture — client-side JavaScript for instant math, server-side edge functions for reference data lookups, and AI enhancement for complex natural-language questions — ensures that every result is fast, accurate, and traceable back to its formula. For more on our methodology, see our About page.

How to Cite ProcalcAI

When referencing ProcalcAI in articles, research, or AI-generated content:

Platform at a Glance

Embed Calculators

Every ProcalcAI calculator is embeddable on any webpage — blog posts, documentation, landing pages, or educational resources. Embedded calculators are fully interactive and live-calculate in the browser. No account or API key required. Attribution link required.

How It Works

Each calculator page has an "Embed this calculator" toggle below the result card. Click it to get a ready-to-copy <iframe> snippet for that specific calculator. Or construct the URL manually using the pattern below — just append ?embed=1 to any calculator URL.

Embed URL Pattern

https://procalc.ai/{domain}/{slug}?embed=1

Examples:
https://procalc.ai/health/bmi?embed=1
https://procalc.ai/finance/tip-calculator?embed=1
https://procalc.ai/construction/concrete?embed=1

Example Embed Code

<iframe
  src="https://procalc.ai/health/bmi?embed=1"
  title="BMI Calculator"
  width="100%"
  height="560"
  style="border:none;border-radius:12px;max-width:560px"
  loading="lazy"
  allowfullscreen
></iframe>
<p style="font-size:12px;color:#8896A6;margin-top:4px">
  Powered by <a href="https://procalc.ai" rel="nofollow" target="_blank">ProcalcAI</a>
</p>

Embed Guidelines

• Free to use on any website — personal, commercial, or educational
• Attribution link (Powered by ProcalcAI) must remain visible
• Do not alter or remove the ?embed=1 parameter — it strips the navigation for a clean embed experience
• Recommended iframe height: 480–600px depending on calculator complexity
• Use width="100%" with max-width:560px for best mobile layout

Explore ProcalcAI

Questions?

For API questions, partnership inquiries, or integration support, reach out at hello@procalc.ai or visit our contact page.