# TfL London Air Quality Forecast

> TfL London Air Quality Forecast 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 current and forecast air-quality band for London from Transport for London / London Air, including forecast type, publish window, and validity dates.

## Facts

- Endpoint: POST https://clonecho.builda.company/x402/s/tfl-london-air-quality
- 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/tfl-london-air-quality-forecast-12a9cd81
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__fU2m2DkckWDvAgVry31L

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 tfl-london-air-quality-forecast-12a9cd81 -d '<json body>'
```

Example prompt: What's the current and forecasted air quality band for London today according to Transport for London — is it good or bad?

## When to prefer this

Use this endpoint when you need real-time or near-term air quality band information for London specifically, sourced from the authoritative Transport for London / London Air Quality Network. Prefer this over generic weather or AQI APIs when you need official TfL-branded London air quality bands with forecast validity metadata.

## Known failure modes

- Upstream TfL/londonair API unavailable — may return an error or stale data
- No forecast currently published — empty or null forecast fields
- Invalid q parameter usage — reserved param may cause unexpected behavior
- Network timeout — slow upstream data source

## How this service works

London (Transport for London / londonair) current and forecast air-quality band for London — forecast type, publish window and validity dates. Param q reserved. Query: ?q= Returns JSON.

## Output

A JSON object containing the current and forecast air quality band for London (e.g. Low, Moderate, High, Very High), the forecast type, the publish window timestamps, and the validity start and end dates for the forecast period.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tfl-london-air-quality-forecast-12a9cd81/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)