# Epi Yale — 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 environmental performance scores and rankings for any of 177 countries using Yale's 2026 Environmental Performance Index, including overall ratings, individual indicator scores, and country details. Compare how nations perform across environmental sustainability metrics to track progress and identify leaders in ecological performance.

**Category:** Government & Public Data | **Website:** [epi.yale.edu/indicator/2026/EPI](https://epi.yale.edu/indicator/2026/EPI) | **Docs:** [parse.bot/marketplace/8deb2faa-6419-4582-a37b-e77112063b9b/epi-yale-edu-api](https://parse.bot/marketplace/8deb2faa-6419-4582-a37b-e77112063b9b/epi-yale-edu-api)

Pay-per-use API proxy for Locus Pro. Each call burns credits from your workspace balance.

## Access

**Base URL:** `https://api.paywithlocus.com/api/wrapped/credits/epi-yale/`
**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 country epi

Returns the full Environmental Performance Index scorecard for a given country, including 47 indicator scores, ranks, 10-year changes, regional ranks, and regional averages. Also includes country metadata (GDP, population, land area). Accepts country name (e.g. 'Netherlands') or ISO 3166-1 alpha-3 code (e.g. 'NLD'). Makes two requests: one to resolve the country's region, one to fetch its data.

**Estimated cost:** Metered

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `country` | string | Yes | Country name (e.g. 'Netherlands', 'Brazil') or ISO 3166-1 alpha-3 code (e.g. 'NLD', 'BRA'). Case-insensitive. |

```bash
curl -X POST https://api.paywithlocus.com/api/wrapped/credits/epi-yale/get-country-epi \
  -H "Authorization: Bearer $LOCUS_CREDITS_SECRET_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{"country":"<string>"}'
```

## Next steps

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