Solar payback Carbon footprint Water quality Facility emissions Pay-per-call USDC

Energy & environmental APIs
on the cheap. Pay-per-call. Verifiable on-chain.

Four x402 endpoints for renewable energy economics, household carbon math, regional water quality, and facility emissions modeling. LLM-backed with sustainability-specialized prompts. $0.05 per call. Settled on Base mainnet.

See the 4 endpoints → How to integrate →
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Four endpoints. Sustainability math at penny-scale.

Each returns structured analysis grounded in IRS energy tax credit rules, EPA emissions factors, and regional water quality monitoring data. Useful for ESG bots, residential decision tools, and quick facility-level scoping.

POST /api/renewable-energy $0.05
Renewable Energy Economics
Residential and commercial solar/wind/storage payback math. Tax credits, utility rates, regional sun/wind, sizing recommendations.
query: "10kW residential solar Texas $0.12 kWh payback"
POST /api/carbon-footprint $0.05
Household Carbon Footprint
Annual CO2 estimate from home energy, vehicles, diet, travel, consumption. EPA emissions factors. Comparable to US average.
query: "1000 sqft home gas heat 12000 mi/yr beef-heavy"
POST /api/water-quality $0.05
Regional Water Quality
Watershed-level water quality status: nitrate, bacterial, heavy metals, agricultural runoff. EPA + state water quality reports.
query: "Brazos River near Waco TX 2024 nitrate"
POST /api/emissions-calc $0.05
Facility Emissions Calculator
CO2, NOx, SOx, particulate matter from industrial/utility facilities. Fuel mix, capacity factor, EPA emissions factors aware.
query: "500MW natural gas plant CO2 NOx SOx annual TX grid"

One curl. Pay a nickel. Get a real estimate.

Standard x402: 402 challenge → sign EIP-3009 USDC transfer → resubmit. Settlement on Base mainnet.

# 1. Initial request — server returns 402 with payment instructions
curl -X POST https://x402.adametherzlab.com/api/carbon-footprint \
  -H "Content-Type: application/json" \
  -d '{"query": "1000 sqft home gas heat 12k mi/yr beef-heavy annual CO2"}'

# 2. Sign EIP-3009, resubmit:
curl -X POST https://x402.adametherzlab.com/api/carbon-footprint \
  -H "Content-Type: application/json" \
  -H "payment-signature: <base64 EIP-3009 signed payload>" \
  -d '{"query": "1000 sqft home gas heat 12k mi/yr beef-heavy annual CO2"}'

# Returns:
{
  "endpoint": "/api/carbon-footprint",
  "name": "Household Carbon Footprint",
  "vertical": "Energy/Environmental",
  "query": "...",
  "result": "<structured CO2 estimate broken out by category with US-average comparison and reduction levers>",
  "pricing": { "amount": "0.05", "currency": "USDC", "network": "base" }
}

Compatible with the MCP server, @x402/client npm, and the CDP SDK.

Flat $0.05 per call. No tier games.

All four endpoints cost the same. No subscription, no commitment, no "ESG plus" upsell.

renewable-energy — $0.05 carbon-footprint — $0.05 water-quality — $0.05 emissions-calc — $0.05

100 carbon footprint calculations = $5. 1,000 solar payback estimates = $50. Useful pricing for ESG dashboards, residential decision tools, sustainability bots.

FAQ

Is this useful for an ESG-reporting workflow?

For preliminary screening and back-of-envelope, yes. For audited Scope 1/2/3 reporting you still need a domain-specific tool (Sphera, Watershed, Persefoni). GreenLedger is for fast cheap math that scales to thousands of calls — the part where heavy tools are overkill.

How accurate is the solar payback estimate?

Good for go/no-go scoping, not for a final installer bid. Real payback varies with roof orientation, shading, panel degradation, utility rate plan changes, and tax structure. Use as a starting point, then get a real quote.

Why pay-per-call for sustainability tools?

Because a homeowner thinking about solar shouldn't pay $20/month for a tool they'll use three times. A school running a class on carbon footprints shouldn't pay enterprise SaaS pricing. Pay-per-call means proportional cost — $0.15 for the homeowner, $5 for the class of 100.

Is the water quality data current?

The model trains on EPA + state water quality reports through 2024. For real-time current data, hit the EPA's water quality data portal directly. GreenLedger is best at synthesizing patterns across years and watersheds.

How do I pay without a Coinbase account?

Any wallet on Base with USDC works. EIP-3009 transferWithAuthorization — sign off-chain, facilitator settles on-chain. No KYC, no signup.