# Londonstockexchange — Wrapped API

> **You are on:** `https://api.beta.paywithlocus.com/api` | [llms.txt](https://beta.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 for Locus Pro. Each call burns credits from your workspace balance.

## Access

**Base URL:** `https://api.beta.paywithlocus.com/api/wrapped/credits/londonstockexchange/`
**Auth:** `Authorization: Bearer <LOCUS_CREDITS_SECRET_KEY>` (an `lcr_` secret key or a scoped `lcac_` agent credential)
**Required header:** `Idempotency-Key: <fresh UUID per call>`. A retry with the same key replays the stored result without a new charge.
**Response:** the provider response after any endpoint-specific normalization. `X-Locus-Credits-Charged` carries the charge and `X-Locus-Credits-Balance` the remaining balance. Insufficient credits return `402` before the provider is called.
**Pricing:** estimated costs below are USD. Locus debits the credit equivalent at your workspace rate.

Full call contract: https://docs.paywithlocus.com/api-reference/introduction

> Using a Pay With Locus wallet key (`claw_` prefix)? Wallet routes are documented separately: https://docs.paywithlocus.com/wrapped-apis/for-agents

## 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.beta.paywithlocus.com/api/wrapped/credits/londonstockexchange/get-ftse100-constituents \
  -H "Authorization: Bearer $LOCUS_CREDITS_SECRET_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{"index_name":"<string>"}'
```

## Next steps

- [All wrapped API providers](https://beta.paywithlocus.com/wapi/index.md): pick another provider.
- [Find and call tools](https://beta.paywithlocus.com/agent/tools.md): price ceilings, async results, and errors.
- [Credits and billing](https://beta.paywithlocus.com/agent/billing.md): what a call costs and how to add credits.
- [Agent docs index](https://beta.paywithlocus.com/agent/index.md): every Locus agent page.