# Sciencedirect — 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.

> Access peer-reviewed scientific articles with complete metadata including titles, author information, abstracts, and direct PDF links from ScienceDirect's research database. Quickly retrieve bibliographic details and full-text documents to streamline your academic research and literature review process.

**Category:** Education | **Website:** [www.sciencedirect.com/science/article/pii/S2590207524000108?via%3Dihub](https://www.sciencedirect.com/science/article/pii/S2590207524000108?via%3Dihub) | **Docs:** [parse.bot/marketplace/e20d2c9d-8be3-415c-b5c5-9dc1fb4b230a/sciencedirect-com-api](https://parse.bot/marketplace/e20d2c9d-8be3-415c-b5c5-9dc1fb4b230a/sciencedirect-com-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/sciencedirect/`
**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 article

Fetch metadata for a single ScienceDirect article by its PII (Publisher Item Identifier), DOI, or ScienceDirect URL. Returns the article title, authors, publisher, journal name, DOI, abstract text, PDF download URL, volume, pages, year, ISSN, and article URL. One upstream request per call when using PII or URL; two requests when resolving a DOI. Cloudflare protection is solved automatically. At least one of pii, doi, or url must be provided.

**Estimated cost:** Metered

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `doi` | string | No | Digital Object Identifier for the article, e.g. 10.1016/j.bioflm.2024.100185. Used to resolve the article when pii is not provided. At least one of pii, doi, or url must be provided. |
| `pii` | string | No | ScienceDirect Publisher Item Identifier (PII) for the article, e.g. S2590207524000108. Found in the article URL path after /pii/. At least one of pii, doi, or url must be provided. |
| `url` | string | No | Full ScienceDirect article URL containing the PII, e.g. https://www.sciencedirect.com/science/article/pii/S2590207524000108. The PII is extracted from the URL path. At least one of pii, doi, or url must be provided. |

```bash
curl -X POST https://api.paywithlocus.com/api/wrapped/credits/sciencedirect/get-article \
  -H "Authorization: Bearer $LOCUS_CREDITS_SECRET_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{"doi":"<string>","pii":"<string>","url":"<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.