# TfL London Tube/Rail Line Route Metadata

> TfL London Tube/Rail Line Route Metadata is a paid API for AI agents from clonecho.builda.company, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Returns route metadata (id, display name, transport mode) for a single Transport for London tube or rail line given a line id.

## Facts

- Endpoint: POST https://clonecho.builda.company/x402/s/tfl-london-line-route
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tfl-london-tube-rail-line-route-metadata-a6573df6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RLIXc7UcA1KvSi8V8cWCm

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-tube-rail-line-route-metadata-a6573df6 -d '<json body>'
```

Example prompt: What's the official display name and transport mode for the Piccadilly line on the TfL network?

## When to prefer this

Use this endpoint when you need quick, structured metadata about a specific TfL tube or rail line by its official line id — for example, to validate a line id, retrieve its human-readable name, or determine its transport mode. Prefer this over scraping TfL's website or calling a broader transit API when you only need line-level route metadata for London.

## Known failure modes

- Invalid or unrecognized line id returns an error or empty result
- Missing q parameter causes a bad request response
- TfL line ids are case-sensitive; incorrect casing may yield no match
- Discontinued or renamed lines may not resolve correctly

## How this service works

London (Transport for London) route metadata for a single tube/rail line — id, display name and transport mode. Param q = line id (e.g. victoria, piccadilly). Query: ?q= Returns JSON.

## Output

A JSON object containing the line's id, human-readable display name, and transport mode (e.g. tube, elizabeth-line, dlr) as defined by Transport for London.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tfl-london-tube-rail-line-route-metadata-a6573df6/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)