# The Blue Book — 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 retrieve company profiles from The Blue Book Building & Construction Network. Find commercial contractors by keyword, trade category (CSI code), and geographic region.

**Category:** Business Directories | **Website:** [thebluebook.com/](https://thebluebook.com/) | **Docs:** [parse.bot/marketplace/0be507ac-e9e5-4bd5-8811-a59cc48caba4/thebluebook-com-api](https://parse.bot/marketplace/0be507ac-e9e5-4bd5-8811-a59cc48caba4/thebluebook-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/the-blue-book/`
**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 company detail

Fetch the full profile for one company by its ID. Returns name, address, phone, website, description narrative, and list of trade specialties. The company_id comes from search_companies results.

**Estimated cost:** Metered

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `company_id` | string | Yes | The company ID from search_companies results (e.g. '398517'). |

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

### List categories

List all CSI trade categories available in the Blue Book search interface. Each category has a code usable as csi_code in search_companies.

**Estimated cost:** Metered

_No parameters required._

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

### List regions

List all available Blue Book geographic regions. Each region has an ID usable as region_id in search_companies. Optionally filter by name substring.

**Estimated cost:** Metered

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `query` | string | No | Region name search filter. Use '****' (default) to return all regions. |

```bash
curl -X POST https://api.paywithlocus.com/api/wrapped/credits/the-blue-book/list-regions \
  -H "Authorization: Bearer $LOCUS_CREDITS_SECRET_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{"query":"<string>"}'
```

### Search companies

Full-text search over commercial construction companies. Returns paginated summaries matching the keyword, optionally filtered by geographic region and CSI trade code. Each result carries a company_id for drill-down via get_company_detail.

**Estimated cost:** Metered

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `csi_code` | string | No | CSI trade code for filtering results (e.g. '1680' for Electrical Contractors). Obtain codes from list_categories endpoint. |
| `query` | string | Yes | Search keyword (e.g. 'HVAC', 'plumbing', 'electrical contractor'). |
| `region_id` | string | No | Region ID to filter by geographic area (e.g. '1' for New York - NYC region). Obtain IDs from list_regions endpoint. |

```bash
curl -X POST https://api.paywithlocus.com/api/wrapped/credits/the-blue-book/search-companies \
  -H "Authorization: Bearer $LOCUS_CREDITS_SECRET_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{"csi_code":"<string>","query":"<string>","region_id":"<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.