# How to use Claude to build a B2B lead list with looot

Describe the companies you sell to in one sentence and get a list with websites, LinkedIn pages and size bands.

## Connect looot to Claude

1. In Claude, open Customize, then Connectors.
2. Click "+ Add", then "Add custom connector".
3. Name it looot and paste the remote MCP server URL https://api.looot.ai/mcp. Click Continue.
4. Review the authentication settings Claude detects and click Continue. Under Authentication pick "Sign in now" or "Sign in when needed". Under OAuth client, Anthropic recommends "Use Claude's published identity". Click Add.
5. looot's sign-in page opens: sign in with your looot account and allow access. Runs are paid from your prepaid looot balance.

Anthropic's help center says custom connectors work on Free, Pro, Max, Ultra, Team and Enterprise, and a Free account can add one custom connector. On Team and Enterprise an Owner or Primary Owner adds it under Organization settings, Connectors, and each member then clicks Connect under Customize, Connectors.

In Claude Code instead: Add looot from your terminal with one command: `claude mcp add --transport http looot https://api.looot.ai/mcp`. Then type /mcp inside Claude Code and follow the browser sign-in.

- Source, read 2026-11-10: [Anthropic help center: Get started with custom connectors using remote MCP](https://support.claude.com/en/articles/11175166-getting-started-with-custom-connectors-using-remote-mcp)
- Source, read 2026-11-10: [Claude Code docs: Connect Claude Code to tools via MCP](https://code.claude.com/docs/en/mcp)

## Ask Claude

In a new chat, click the "+" button at the lower left, choose Connectors and switch looot on for this conversation. Then paste the prompt.

Use looot to find companies that match this description: [industry, country, employee range]. Run the job company.search with fallback on and ask for up to 25 results. Return a table with name, website, city, size band and LinkedIn URL. Do not add companies the search did not return.

## Jobs it calls and what they cost

One use costs from $0.00038 at today's cheapest providers. A provider that misses can fall back to the next one, which can cost more; looot charges only the calls that ran, from your prepaid balance.

- `company.search`: 1 call, from $0.00038 per result (Icypeas, the cheapest of 19 providers). Compare providers: [company.search benchmark](/benchmarks/company-search). [About the cheapest provider](/providers/icypeas)

## A real run

We ran this task through the looot MCP on 2026-11-10. Asked: B2B SaaS companies in France with 50 to 200 employees. Total charged: $0.0089.

- company.search on tomba-reveal-search (Tomba): answered, charged $0.0089. Run id run_07e81b417e2245afa2a1b8a071258082.
- 8 companies came back. Tomba read the sentence as: country FR, size 51 to 250, industry Software Development, keyword b2b saas.
- Examples: Welii (welii.io), Stonal (stonal.com), Fabriq (fabriq.tech), lempire (lempire.com), PLPSoft (plpsoft.com).
- Each row has a website, a LinkedIn URL, the city and how many emails the provider knows at the company (1 to 7).
- The size band 51 to 250 is wider than the 50 to 200 we asked for.

## Good to know

- The provider turns your sentence into filters. Check the filters it used against what you asked before you trust the list.

## More

- [The same task in ChatGPT](/guides/chatgpt/b2b-lead-generation)
- [The prompt on its own](/prompts/find-companies-by-filters)
- [All Claude guides](/guides/claude)