Get historical carbon intensity API

Retrieve historical or forecast carbon intensity data for a specific time period from the Carbon Intensity API. Supports regional filtering.

The Get historical carbon intensity operation is part of the Energy Intelligence API on BRAINIAC.software. Retrieve historical or forecast carbon intensity data for a specific time period from the Carbon Intensity API. Supports regional filtering. It is exposed as POST /api/v1/energy-intelligence/historical and priced at $0.05 USDC on Base. Payment uses the x402 exact scheme: an unpaid call returns HTTP 402 with payment requirements; after paying the exact USDC amount, retry the same request with a payment-signature header and Idempotency-Key. No account and no API key are required. Data sources for this product: Carbon Intensity API Limitations: Figures are the published grid values for Great Britain. Forecasts are the source forecast, not a BRAINIAC.software prediction. Outputs are compliance prechecks, drafts, or data lookups for human review. They are not official determinations, legal advice, identity confirmation, or certified filings. Related operations in this group include Get current carbon intensity, Get regional carbon intensity, Get generation mix, Get carbon intensity forecast. Open the group documentation for the full request schema, field notes, and response examples before integrating.

POST$0.05 USDC
/api/v1/energy-intelligence/historical

Example request

curl -i -X POST "https://www.brainiac.software/api/v1/energy-intelligence/historical" \
  -H 'content-type: application/json' \
  -H 'Idempotency-Key: <fresh-64-character-random-hex-key>' \
  --data-binary @- <<'JSON'
{
  "from": "2026-11-01T00:00:00Z",
  "to": "2026-11-01T23:30:00Z"
}
JSON

An unpaid probe returns HTTP 402 with x402 payment requirements. After paying the exact USDC amount on Base, retry the identical request with a payment-signature header.

FAQ

  • Do I need an API key? No. Pay the listed USDC amount with x402.
  • What network? Base (eip155:8453), USDC.
  • Is this an official determination? No. Results are for human review against the cited sources.

Related APIs

Energy Intelligence APIFull docsHow it works