# Valorebooks — 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.

> Search for books and instantly compare prices across ValoreBooks' inventory while getting real-time buyback quotes for books you want to sell. Access detailed book information including pricing and resale values to find the best deals on textbooks and used books.

**Category:** Education | **Website:** [valorebooks.com/](https://valorebooks.com/) | **Docs:** [parse.bot/marketplace/d1f3b079-b992-4bd2-915a-805f6ca24c1c/valorebooks-com-api](https://parse.bot/marketplace/d1f3b079-b992-4bd2-915a-805f6ca24c1c/valorebooks-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/valorebooks/`
**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 book details

Get detailed information about a book by ISBN including title, metadata (ISBN-13, ISBN-10, LCCN), structured JSON-LD data, and current marketplace offers with price, condition, and seller. Searches by ISBN and follows the redirect to the product page.

**Estimated cost:** Metered

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `isbn` | string | Yes | ISBN-13 or ISBN-10 of the book. |

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

### Get buyback quote

Get a buyback quote for a book by ISBN. Returns eligibility status, the offered buyback price, shipping info, and any edition restrictions. Books that do not qualify return eligible=false with an explanatory message.

**Estimated cost:** Metered

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `isbn` | string | Yes | ISBN of the book to get a buyback quote for. |

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

### Search books

Search for books by title, author, or ISBN. Returns a list of matching books with title, ISBN, and product URL. When the query matches an ISBN exactly the site may redirect to the product page; in that case the response contains full book details instead of a results list.

**Estimated cost:** Metered

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `query` | string | Yes | Search query — a title, author name, or ISBN. |

```bash
curl -X POST https://api.beta.paywithlocus.com/api/wrapped/credits/valorebooks/search-books \
  -H "Authorization: Bearer $LOCUS_CREDITS_SECRET_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{"query":"<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.