# Usacoinbook — 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.

> Search and browse detailed information about U.S. coins including prices, melt values, and current marketplace listings. Discover coin categories, series, and identify the most valuable coins in any collection.

**Category:** Finance & Markets | **Website:** [usacoinbook.com/](https://usacoinbook.com/) | **Docs:** [parse.bot/marketplace/00dbc222-468f-42fa-9a65-41e8e8c496f9/usacoinbook-com-api](https://parse.bot/marketplace/00dbc222-468f-42fa-9a65-41e8e8c496f9/usacoinbook-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/usacoinbook/`
**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 coin detail page

Get specific coin detail page data including name, images, coin information (mintage, designer, metal composition, diameter, weight), and prices by grade. Returns stale_input if the URL does not point to a valid coin page.

**Estimated cost:** Metered

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `url` | string | Yes | Full URL of the coin detail page from get_coin_series_page coins[*].url (e.g. https://www.usacoinbook.com/coins/2775/half-dollars/walking-liberty/1916-P/). |

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

### Get coin melt values

Get current coin melt values for all US coin types including metal composition, weight, and melt value. Spot prices are included when parseable from the page. Melt values update with live metal prices.

**Estimated cost:** Metered

_No parameters required._

```bash
curl -X POST https://api.paywithlocus.com/api/wrapped/credits/usacoinbook/get-coin-melt-values \
  -H "Authorization: Bearer $LOCUS_CREDITS_SECRET_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{}'
```

### Get coin series page

Get coin series data including mintage and values table for a specific coin series. Use URLs from list_coin_categories series[*].url. Returns title, description, specifications, and a table of coins with year, mintage, grade values, and detail page URL. Returns stale_input if the URL does not point to a valid series page.

**Estimated cost:** Metered

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `url` | string | Yes | Full URL of the coin series page from list_coin_categories series[*].url (e.g. https://www.usacoinbook.com/coins/small-cents/lincoln-wheat-cent/). |

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

### Get listing detail

Get detail for a specific marketplace listing including title, price, listing specifications (seller info, shipping, return policy), and description. Returns stale_input if the listing has been removed.

**Estimated cost:** Metered

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `url` | string | Yes | Full URL of the listing from search_coins results[*].url (e.g. https://www.usacoinbook.com/item/1878-p-morgan-dollar-7-tail-feathers-very-fine-974447/). |

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

### Get most valuable coins

Get lists of the most valuable US coins with their estimated values. Returns multiple categorized lists of coins sorted by value, organized by coin type (e.g. pennies, nickels, dimes, quarters, half dollars, dollars).

**Estimated cost:** Metered

_No parameters required._

```bash
curl -X POST https://api.paywithlocus.com/api/wrapped/credits/usacoinbook/get-most-valuable-coins \
  -H "Authorization: Bearer $LOCUS_CREDITS_SECRET_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{}'
```

### List coin categories

Get structured list of all coin denominations and series from usacoinbook.com. Each denomination contains a name, coin count, URL, and nested series array. Series entries expose their URL for use with get_coin_series_page.

**Estimated cost:** Metered

_No parameters required._

```bash
curl -X POST https://api.paywithlocus.com/api/wrapped/credits/usacoinbook/list-coin-categories \
  -H "Authorization: Bearer $LOCUS_CREDITS_SECRET_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{}'
```

### Search coins

Search for coins for sale on the usacoinbook.com marketplace. Returns listings matching the search query with title, price, URL, and seller info. Results include all matching listings on a single page.

**Estimated cost:** Metered

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `query` | string | Yes | Search keyword for finding coin listings (e.g. 'morgan dollar', '1909 S VDB lincoln penny'). |

```bash
curl -X POST https://api.paywithlocus.com/api/wrapped/credits/usacoinbook/search-coins \
  -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://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.