# UK Carbon Intensity Forecast by Date

> UK Carbon Intensity Forecast by Date is a paid API for AI agents from clonecho.builda.company, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-13).

Returns half-hourly national carbon intensity forecast and actual values for the GB electricity grid for a specified date.

## Facts

- Endpoint: POST https://clonecho.builda.company/x402/s/uk-carbon-intensity-by-date
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/uk-carbon-intensity-forecast-by-date-9d21a5ba
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_U-H3Q1Alz8I9roL7OHJmQ

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability uk-carbon-intensity-forecast-by-date-9d21a5ba -d '<json body>'
```

Example prompt: Can you pull up the half-hourly carbon intensity forecast and actual values for the UK national grid on 2024-06-15? I want to see which periods had the cleanest electricity.

## When to prefer this

Use this endpoint when you need time-series carbon intensity data (both forecast and actual) for the GB national electricity grid on a specific calendar date, broken into half-hourly intervals. Prefer this over the emission factors endpoint (which gives per-fuel-type static values) when you need temporal, date-specific intensity data. Ideal for sustainability dashboards, scheduling energy-intensive tasks to low-carbon periods, or retrospective carbon footprint analysis.

## Known failure modes

- Invalid date format (not YYYY-MM-DD) returns an error
- Date too far in the future may return only forecast values with no actuals
- Date too far in the past may return no data if outside data retention window
- Missing date parameter may return an error or default behavior
- Network or upstream API outage returns HTTP 5xx

## How this service works

Half-hourly national carbon intensity forecast/actual for a given date (param: date YYYY-MM-DD). Query: ?date= Returns JSON.

## Output

A JSON array of half-hourly time slots for the requested date, each containing forecast and actual carbon intensity values in gCO2/kWh, along with the intensity index (e.g. very low, low, moderate, high) for the GB national electricity grid.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/uk-carbon-intensity-forecast-by-date-9d21a5ba/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from clonecho.builda.company](https://www.zero.xyz/host/clonecho.builda.company/llms.txt)