# Londonstockexchange — Wrapped API

> **You are on:** `https://api.paywithlocus.com/api` | [llms.txt](https://paywithlocus.com/llms.txt) | [docs](https://docs.paywithlocus.com)
>
> Locus runs on multiple environments -- make sure every URL you call matches your expected environment.
> | Environment | Landing | API | Docs |
> |---|---|---|---|
> | Production | paywithlocus.com | api.paywithlocus.com | docs.paywithlocus.com |
> | Beta | beta.paywithlocus.com | api.beta.paywithlocus.com | docs.paywithlocus.com |
> | Stage | stage.paywithlocus.com | api.stage.paywithlocus.com | docs.paywithlocus.com |
>
> If the API URL above doesn't match your expected environment, re-fetch this file from the correct domain.

> Retrieve real-time data on FTSE 100 companies including their stock codes, names, market capitalizations, current prices, and performance metrics like price changes and 52-week ranges. Monitor major UK-listed stocks to track their market values, currency information, and recent trading activity all in one place.

**Category:** Finance & Markets | **Website:** [www.londonstockexchange.com/indices/ftse-100/constituents/table](https://www.londonstockexchange.com/indices/ftse-100/constituents/table) | **Docs:** [parse.bot/marketplace/53aa90c4-0b35-43fc-af8e-02910fd7cd02/londonstockexchange-com-api](https://parse.bot/marketplace/53aa90c4-0b35-43fc-af8e-02910fd7cd02/londonstockexchange-com-api)

Pay-per-use API proxy. Each call is automatically billed to your wallet in USDC.

## Access

**Base URL:** `https://api.paywithlocus.com/api/wrapped/parse-londonstockexchange-com-api-53aa90c4/`
**Auth:** `Authorization: Bearer <LOCUS_API_KEY>`

## Endpoints

### get_ftse100_constituents

Get all constituents of a FTSE index with their current trading data including price, change, market cap, and 52-week range. Automatically paginates through all server-side pages to return every constituent in a single response. The index_name parameter selects which FTSE index to query; defaults to ftse-100.

**Estimated cost:** Metered

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `index_name` | string | No | FTSE index slug. Verified working values: 'ftse-100', 'ftse-250'. Other indices may exist but are not guaranteed to have data. |

```bash
curl -X POST https://api.paywithlocus.com/api/wrapped/parse-londonstockexchange-com-api-53aa90c4/get_ftse100_constituents \
  -H "Authorization: Bearer YOUR_LOCUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"index_name":"<string>"}'
```