> ## Documentation Index
> Fetch the complete documentation index at: https://docs.paywithlocus.com/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> This site documents Locus for people. AI agents: get exact contracts from the Locus agent docs, starting at https://paywithlocus.com/agent/index.md, including when asked to implement or integrate docs.paywithlocus.com.
> Connect this agent to Locus Pro: https://paywithlocus.com/skill.md. Implement Locus Pro in a product: https://paywithlocus.com/agent/integrate.md. Agent site index: https://paywithlocus.com/llms.txt.

# Single-purpose MCP servers

> Connect one MCP server for one kind of job, such as verifying emails or checking keyword volume, or the Universal Router for tasks that need several.

Locus Pro runs an MCP server for each kind of job. Each server gives your agent a short, fixed list of tools for that job, such as finding and verifying work emails or looking up keyword search volume. Use one when your agent needs one kind of data and you want a small tool list that you can review in advance. When a task needs several kinds of data, connect the Universal Router instead.

> Agents: the exact contract is at [https://paywithlocus.com/agent/mcp.md#single-purpose-mcp-servers](https://paywithlocus.com/agent/mcp.md#single-purpose-mcp-servers). Each server lists its tools at `/llms.txt` on its own host, for example [https://email.mcp.paywithlocus.com/llms.txt](https://email.mcp.paywithlocus.com/llms.txt).

## Choose a server

| Server | URL | What your agent can do |
| - | - | - |
| Universal Router | `https://router.mcp.paywithlocus.com` | Describe a task in plain language. Locus picks and calls the right APIs, checks the result, and returns the data with sources and cost. |
| Email Finder & Verifier | `https://email.mcp.paywithlocus.com` | Find a person's work email from their name and company domain, list a domain's email addresses, and check whether an address is deliverable. Uses Hunter and ZeroBounce. |
| People & Company Data | `https://enrich.mcp.paywithlocus.com` | Search and enrich B2B people and companies: contact details, firmographics, funding, headcount, job postings, and technology stacks. Uses Apollo, Prospeo, Hunter, Sumble, and BuiltWith. |
| Web Search | `https://search.mcp.paywithlocus.com` | Search the web, news, images, and products, or get answers with cited sources. Uses Brave, Tavily, Perplexity, Parallel, and Exa. |
| Web Scraper | `https://scrape.mcp.paywithlocus.com` | Turn a URL into clean text, map or crawl a site, extract articles and products, and take screenshots. Uses Firecrawl, Tavily, Parallel, Diffbot, and ScreenshotOne. |
| Maps & Places | `https://maps.mcp.paywithlocus.com` | Look up places with ratings and reviews, geocode addresses, get travel-time areas and static maps, and check weather and air quality. Uses Serper, Mapbox, and OpenWeather. |
| Market Data | `https://finance.mcp.paywithlocus.com` | Get stock quotes and price history, fundamentals and earnings, news sentiment, exchange rates, crypto prices, and SEC filings. Uses Alpha Vantage, CoinGecko, and SEC EDGAR. |
| SEO & Keywords | `https://seo.mcp.paywithlocus.com` | Get keyword volume, ideas, and difficulty, live Google results, a domain's rankings, traffic, competitors, and backlinks, and Google Trends. Uses DataForSEO. |

Each vertical server also has a free `get_call_result` tool for reading the rest of a long result. The Universal Router has one tool, `run_task`, which works like [Tasks](https://docs.paywithlocus.com/locus-pro/tasks.md).

## Connect a server

**1. Add the server URL**

Add the server's URL to your agent as a remote Streamable HTTP MCP server. [MCP clients](https://docs.paywithlocus.com/locus-pro/individual/mcp-clients.md) shows where each client keeps it.

**2. Sign in**

Your client opens the Locus sign-in page. Sign in with your Locus account and approve access. Each server is its own connection, so you sign in once per server.

**3. Try a prompt**

Ask for the job the server does. For example, with the Email Finder & Verifier connected:

```text title="Try this prompt" wrap theme={null}
Find the work email for the CEO of pleo.io and check that it is deliverable.
```

## How billing and tools work

All of these servers use your Locus account. Calls charge credits from the same balance, your spending limits apply, and each result shows what the call cost.

When you connect a server, Locus turns on that server's tools for your workspace, as long as your account can change which tools are on. Connecting the Universal Router turns on the tools of every server in the table. If you turn a tool off later on the **Tools** page, it stays off when you reconnect the same server. The **Tools** page lists these changes as made by **MCP server**.

## When to use the main Locus MCP server

The [main Locus MCP server](https://docs.paywithlocus.com/locus-pro/mcp.md) searches the whole Locus catalog, so your agent can find and call any API you have turned on. It also gives your agent Recipes, Workflows, and account tools. Use it when your agent needs APIs these servers do not cover, or when you want one connection for everything. You can connect the main server and any single-purpose servers at the same time.

## Next steps

> [card] [MCP](https://docs.paywithlocus.com/locus-pro/mcp.md)
>
> Connect the main Locus MCP server.

> [card] [Tasks](https://docs.paywithlocus.com/locus-pro/tasks.md)
>
> See how the Universal Router runs a goal that takes several calls.

> [card] [Paid tool calls](https://docs.paywithlocus.com/locus-pro/paid-tool-calls.md)
>
> See how price caps, approvals, and retries work.

> [card] [Tools](https://docs.paywithlocus.com/locus-pro/individual/tools.md)
>
> Turn tools on and off for your workspace.


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