--- title: "Claude Duet: connect Leadsets B2B data over MCP" description: "How to use Leadsets with Claude Duet through the remote MCP server and free skills: setup steps, an example workflow, limits, email labels and gaps." canonical: https://www.leadsets.ai/integrations/claude-duet updated: 2026-11-09 --- # Using Leadsets with Claude Duet Leadsets connects to Claude Duet the way it connects other personal agents: through its remote MCP server at https://mcp.leadsets.ai plus free, open-source GTM skills. Once connected, the agent can search people and companies, enrich contacts, return verified work emails and scrape company sites. Pricing is a flat monthly fee from $29, with 1,000 free records to start. ## What Claude Duet can do with Leadsets Claude Duet is Anthropic's personal agent, announced October 21, 2026 as a waitlisted research preview for Claude Pro and Max subscribers in the US. Leadsets lists it alongside other personal agents that connect through the **MCP server + skills**. Once Leadsets is connected, the agent gets eight tools it can call on its own: - `search_people`: find people by title, function, seniority, location, company size and industry, with a match reason on every result. - `search_companies`: find accounts by industry, headcount band, technology and location. - `enrich_person`: current role, company and a verified work email when one exists. - `enrich_company`: firmographics for a domain, with source and freshness on every field. - `verify_email`: verified, catch-all, unknown or invalid, with a confidence score. - `scrape_company` and `scrape_jobs`: a company homepage or careers page turned into structured facts, such as products, positioning and open roles. - `get_usage`: what is left in the current window and week, at no cost. You describe your customer in plain language, for example "RevOps leads at 50 to 200 person fintechs", and the agent turns it into filters and picks the tools. ## How to connect Claude Duet to Leadsets The Leadsets docs do not publish setup steps specific to Claude Duet. What follows is the generic remote MCP and REST setup the docs describe. For where Claude Duet lets you add connectors or skills, check Anthropic's own documentation. 1. **Get a key.** Create a free Leadsets account. You get 1,000 records, one time, with no card. API keys start with `ls_live_` and should be kept server-side. 2. **Add the MCP server URL.** The server is remote, so nothing is installed: `https://mcp.leadsets.ai`. For Claude on the web and desktop, the docs describe Customize, Connectors, + Add, Add custom connector, then naming it Leadsets, pasting the URL, choosing Continue, Sign in now and Add. That flow uses OAuth, so there is no key to paste. These steps are documented for Claude, not for Claude Duet. 3. **If a client asks for a key instead,** add an `Authorization` header with `Bearer ls_live_…`, as the docs show for Cursor. 4. **Check it works.** Ask the agent "What's my Leadsets usage?" If it calls `get_usage` and answers with your remaining balance, the connection is live. 5. **Add a skill.** Leadsets publishes 50 free, MIT-licensed SKILL.md playbooks. Download a skill folder and upload it, or clone the library with `git clone github.com/leadsets/leadsets-skills`. Skills work on the free key. 6. **Or call REST directly.** Every tool is also an endpoint at `https://api.leadsets.ai/v1` with a bearer key, for example `POST /v1/people/search`, with TypeScript and Python SDKs. 7. **Move the list on.** Export results as CSV, push to Google Sheets, or hand them to a sequencer or CRM through skills. Full details are in the [MCP connection docs](https://www.leadsets.ai/docs/mcp), and the Claude-specific steps are on the [Claude integration page](https://www.leadsets.ai/integrations/claude). ## Example workflow: a send-ready RevOps list Maya Chen runs revenue operations at Northwind Analytics (northwind.co). She asks her agent: "Build a list of 100 heads of RevOps at US B2B SaaS companies with 50 to 200 people. Put it in a Google Sheet." With the [build an outbound prospect list skill](https://www.leadsets.ai/skills/build-outbound-prospect-list), the agent: 1. Confirms the ICP and asks one question if anything is ambiguous. 2. Calls `get_usage` to check remaining limits and plan the run. 3. Probes the filters with a 1-record `search_companies` call. 4. Runs `search_people` for matching people, each with match reasons. 5. Calls `enrich_person` on each person. Emails returned this way are already verified, with no second bill. 6. Returns a sheet with verified addresses, catch-alls on a separate tab, and a note on who had no email. If Maya wants timing signals too, she can ask which of those companies are hiring SDRs. The agent then uses `scrape_jobs` on their careers pages, which needs scrape units on a paid plan. ## What to watch for - **Records and requests.** A record is one person or company returned with data. Empty searches use no records, but every call counts as one request. The request limit is five times the record allowance. - **Plan limits.** Search and enrichment each have a rolling five-hour window and a weekly limit. Solo ($29 a month) allows 500 search records and 1,000 enrichments per five hours; Pro ($99) allows 7,500 and 15,000. Team is $399 and Max is $999. See [limits and costs](https://www.leadsets.ai/docs/limits). - **Hitting a limit.** The API returns 429 with a Retry-After time, and the blocked call counts against nothing. On the free plan, a 402 `free_records_exhausted` means the 1,000 records are used up. - **Concurrency.** Solo runs 3 searches at once, Pro 5, Team and Max 8. - **Email labels.** Verified means the mailbox accepts mail. Catch-all means the domain accepts everything, so send at lower volume. Unknown means the server gave no clear answer. Invalid addresses are never served as contact emails. Read more on [catch-all emails](https://www.leadsets.ai/answers/what-is-a-catch-all-email). - **Scraping.** `scrape_company` and `scrape_jobs` are not on the free plan. They use add-on units: $9 for 1,000, $19 for 5,000, $49 for 20,000. ## What it does not do - **No phone numbers yet.** If you need direct dials or mobiles, use a provider that offers them. - **Not a CRM or sending tool.** Leadsets feeds HubSpot, Salesforce, Pipedrive, Attio, Instantly, Smartlead or LinkedCamp; it does not send email itself. - **Business data only.** No consumer data, sensitive categories or home addresses. US personal emails are available on paid plans. - **No logged-in scraping.** Only public company pages, with robots signals respected. - **No SOC 2 report today.** SOC 2 Type I readiness is underway with a target of Q3 2027. If your security review requires SOC 2 now, factor that in. - **No guarantee about Claude Duet itself.** Access, availability and connector support in Claude Duet are set by Anthropic, not Leadsets. ## Questions and answers ### What is Claude Duet? Claude Duet is Anthropic's personal agent, announced October 21, 2026 as a waitlisted research preview for Claude Pro and Max subscribers in the US. Leadsets lists it among personal agents that connect through its MCP server and skills. ### How do I connect Leadsets to Claude Duet? Leadsets connects through its remote MCP server at https://mcp.leadsets.ai plus its free skills. The Leadsets docs do not publish Claude Duet-specific menus, so follow the generic MCP setup and check Anthropic's documentation for where to add it. To confirm the connection, ask the agent "What's my Leadsets usage?". ### Do I need an API key to use Leadsets with Claude Duet? In Claude on the web and desktop, the documented Leadsets connector uses OAuth, so there is no key to paste. Clients that need a key take an Authorization header with Bearer and your key, which starts with ls_live_. The REST API at https://api.leadsets.ai/v1 always uses a bearer key. ### Can Claude Duet get phone numbers through Leadsets? No. Leadsets does not offer phone numbers yet. It returns work emails, US personal emails on paid plans, roles and company data. ### How much does it cost to use Leadsets with Claude Duet? Leadsets has a free plan with 1,000 one-time records and no card, then flat monthly plans: Solo $29, Pro $99, Team $399 and Max $999 in USD, with no credits. Scraping is an add-on from $9 for 1,000 units. Any cost of Claude Duet itself is separate and set by Anthropic. ### Are emails found through Claude Duet and Leadsets verified? Every email Leadsets returns from enrich_person has already run through its verification waterfall. Each address is labelled verified, catch-all, unknown or invalid, and uncertain results are never rounded up to valid. --- Leadsets · https://www.leadsets.ai · Site index: https://www.leadsets.ai/llms.txt