MCP server de Leadbase

Leadbase: AI Lead Generation and Contact Enrichment

Your next customer list starts with one sentence.

Tell your AI assistant which companies or decision-makers you want to reach. Leadbase turns that request into a researched, editable prospect list with sources, ready for your team to qualify and use.

Find target accounts, research professional contacts and enrich the details that make a lead worth pursuing. Work inside a compatible AI assistant or open the same persistent sheet in Leadbase. Keep your research, evidence and next questions together as your list develops.

Try your own target market with 200 free credits in every new workspace.

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Find 10 solar installation companies in Bavaria that serve commercial customers. Include their websites, evidence of commercial projects and relevant professional contacts. Save the companies in a new Leadbase sheet.

Contents

• What is Leadbase?
• Why teams choose Leadbase
• Features and practical benefits
• DACH lead generation
• Who uses Leadbase?
• From your first request to a qualified list
• Research questions that reveal customer fit
• Example prompts
• Connect your account
• Live sheets and source evidence
• Pricing and free credits
• Considering an Apollo alternative?
• Frequently asked questions
• Data and permissions
• About this public plugin bundle
• Glossary
• Support and useful links

What is Leadbase?

Leadbase is an AI lead generation, company research and contact enrichment platform. It helps you discover accounts, understand why they fit your offer and bring the results into a sheet you can continue working with.

The Leadbase MCP server connects that research workflow to compatible AI assistants, including ChatGPT, Claude, Claude Code, Codex, Cursor and Cline. Describe the result in ordinary language, then let your assistant use Leadbase to create a list, research existing records or retrieve findings and supporting sources.

Think of the output as a working prospect list. Each company, person, product or public content item has its own row. Research fields become columns. Your team can inspect the evidence, correct a value, add a qualification question and export the shortlist when it is ready.

This repository provides the shared integration bundle for those workflows. A single hosted service connects your assistant to your existing Leadbase workspace and sheets.

Why teams choose Leadbase

Describe the customer you actually want

Your ideal customer may be a regional manufacturer, a specialist installer or an agency serving one particular market. Describe the services, business model, location and evidence that make an account relevant. Turn your ideal customer profile into a research brief your assistant can act on.

Understand why an account belongs on your list

A company name is a starting point. Add the details that explain fit: a relevant service, a commercial customer focus, a public hiring signal or a branch network. Keep the explanation and available source links beside the account, so a teammate can understand your reasoning when reviewing the list.

Bring company research and contact research together

Build your account shortlist, then research the professional roles that matter for your offer. You can also create a dedicated people list when the person is your starting point. Keep the company context close to the contact, so your next conversation starts with something relevant.

Keep the work useful after the first answer

Your list stays in an editable Leadbase sheet. Revisit it, enrich another field, filter the results or export the accounts you want to pursue. The first research request becomes a foundation for the next one.

Features and practical benefits

Capability	What you can do	Why it helps
AI company discovery	Describe target businesses by region, offer and relevant criteria	Build a list around your actual market
Professional contact research	Research people by company, role and business context	Identify relevant decision-makers for an account
New company and people lists	Save each requested entity as its own result row	Get a usable list structure from the start
Existing-list enrichment	Add missing details and new research fields to your sheet	Improve the records your team already has
Whole-column enrichment	Research a defined field across existing rows	Apply the same qualification question consistently
Custom account qualification	Ask questions about services, customers or public signals	Evaluate fit using criteria specific to your offer
Readable source evidence	Inspect available supporting links with the findings	Check and cite the facts behind your shortlist
Persistent research sheets	Return to the same saved results	Continue research without recreating the list
Interactive sheet editing	Edit cells, search and filter in the sheet	Turn research into a practical working dataset
Research progress	Follow the operation and retrieve completed findings	See how the request is progressing
CSV export	Export the reviewed sheet	Move a shortlist into your downstream workflow
Hosted MCP connection	Connect a supported client through OAuth	Use Leadbase from an existing AI workflow
Workspace access controls	Work with sheets your connected account can access	Keep research within the intended workspace
Product and public web research	Collect structured products, suppliers or content	Reuse the workflow beyond sales prospecting

DACH lead generation

Leadbase is useful for teams researching companies in Germany, Austria and Switzerland, including German SMEs, regional service providers and craft businesses. Start with a specific territory and the kind of customer your offer is built for.

For a DACH prospecting project, you might describe:

• Solar installers in Bavaria with evidence of commercial projects.
• HVAC service companies in Austria that offer maintenance contracts.
• Swiss manufacturers advertising a relevant public job opening.
• Independent kitchen retailers in Germany with multiple showrooms.
• Industrial service providers in a defined German sales territory.

These are research briefs you can adapt to your own market. Decide which details would make the result useful, then include those fields in your request. For a local sales campaign, that could be the business address and service area. For account-based sales, it could be customer segments, relevant services and professional roles.

Leadbase also supports research outside DACH. Specify the country, language context and target criteria when researching another region.

Who uses Leadbase?

Team or role	A useful starting task	The result to work toward
Founders	Find businesses matching a new product's ideal customer profile	A focused first prospect list
SDR and BDR teams	Research target accounts and the professional roles involved	Accounts with context for relevant outreach preparation
Account executives	Add business-fit evidence to named accounts	A better-informed account review
Sales operations	Enrich missing company fields in an existing sheet	More useful data for the next workflow
Agencies	Research prospects for a specific service or client niche	A shortlist tailored to the campaign
Consultants	Map a regional market and classify relevant providers	A structured market overview
Partnership teams	Find distributors, agencies or complementary businesses	Potential partners with a clear reason for relevance
Recruiting businesses	Research employers and professional decision-makers	Company context for business development
Procurement teams	Compare suppliers or products against requirements	A source-linked supplier or product shortlist

From your first request to a qualified list

1. Define the result

Start with the entity you want: companies, professional contacts, products or public content. Add the number of results, geographic scope and fields that matter. A clear brief gives your assistant a concrete outcome to work toward.

Find 10 independent coffee roasters in Berlin. Include the company name, official website, location and evidence that they supply cafes or restaurants. Save one company per row in a new private sheet.

2. Connect the intended workspace

Complete the Leadbase sign-in flow in your supported client and choose the workspace you want to use. You can ask the assistant to show your accessible sheets or check the credit balance before starting research.

3. Follow progress and inspect the findings

Research can continue after the first tool response. Ask your assistant to follow the operation, retrieve its results and show the sheet. Review the source links for the criteria that matter to your decision.

4. Add your qualification questions

Once the list exists, enrich the same rows with another field. For example, research whether each roaster offers wholesale supply, training or equipment support. Your list becomes more useful as the questions become more specific to your offer.

5. Review and use the shortlist

Edit values, filter your sheet and export the accounts you want to pursue. Keep the sheet for follow-up research when your campaign develops or a teammate needs more context.

New rows or enrichment?

Use new-list research when you want additional entities, such as 50 new companies or 20 professional contacts. Each entity becomes a new result row.

Use enrichment when the entities already exist in your sheet and you want to learn something else about them. You can research selected records or an entire column. The standard column workflow preserves populated values and skips cells already undergoing research.

Research questions that reveal customer fit

The most valuable field is often the one that reflects how you sell. Before adding a research column, ask which answer would change your decision about an account.

Research question	What it helps you assess	Useful evidence to request
Does this company serve commercial customers?	Fit for a B2B offer	A service page or commercial project example
Does it offer installation and maintenance?	Fit for a recurring-service workflow	Service descriptions and maintenance pages
Does it operate multiple locations?	Potential operational complexity	Official branch or location pages
Is it hiring for a relevant role?	A public signal connected to your offer	Current job posting and publication context
Which customer industries does it mention?	Relevance to your vertical	Customer pages or case studies
Does it offer the product category we support?	Product or supplier fit	Official product and category pages
Who appears responsible for the relevant function?	A starting point for contact research	Professional role and profile evidence

Request both the conclusion and the supporting source. A finding such as “commercial projects mentioned on the services page” is easier to review when the source stays attached to the account. Where the evidence does not answer the question, keep that uncertainty visible in the sheet.

Example prompts

Copy a prompt, replace the market and criteria with your own, and start with a focused request. These examples describe research tasks; the available evidence and contact data determine the findings.

Company search and B2B prospecting

1. Regional sales: “Find 10 industrial cleaning companies in North Rhine-Westphalia that work with manufacturing customers. Include official websites and the source for the customer focus.”
2. Craft businesses: “Find 10 electrical installation businesses in Hamburg. Research whether they offer commercial building services. Save one company per row.”
3. Specialist services: “Find 5 Austrian HVAC companies with a maintenance offering. Include the relevant service page for each company.”
4. Market mapping: “Create a company list of Swiss packaging manufacturers. Include location, product focus and official website.”

Decision-makers and professional contacts

1. Account contacts: “For the companies in this sheet, research the most relevant professional contact for facilities management. Include role and available profile sources.”
2. People list: “Create a new list of professional contacts responsible for partnerships at German B2B software companies. Save one person per row with company context.”
3. Founder research: “Research the founders of these agencies and add available professional profile links to the existing rows.”

Existing-list and column enrichment

1. Company details: “Fill the empty headquarters cells in this sheet using official company sources. Keep existing values.”
2. Qualification: “Research whether each company in this sheet serves commercial customers. Add a short explanation and supporting source.”
3. Locations: “For the selected companies, research their branch locations using the official websites.”
4. Public hiring signals: “Check whether these companies have a current public job posting for a service technician. Include the job URL and what you found.”
5. Follow-up research: “Add a field explaining which of these suppliers offer maintenance contracts. Use the same sheet.”

Suppliers, products and public content

1. Supplier discovery: “Find 5 suppliers of reusable transport packaging in Germany. Include their product focus and source websites.”
2. Product research: “Create a shortlist of commercial air purifiers. Include manufacturer, product name, published specifications and source URL.”
3. Content research: “Find public posts about commercial solar installation in Germany. Save each relevant post as a row with author, topic and source link.”
4. Competitor research: “Research the public service offerings of the companies in this sheet. Add the service categories and supporting pages.”

Working with your results

1. Progress: “Show the progress of my latest Leadbase research and open the corresponding sheet.”
2. Evidence review: “Read the source evidence behind these qualification results and cite the links in your summary.”
3. Workspace overview: “Show my accessible Leadbase sheets and check the workspace credit balance.”
4. Next research step: “Summarize which accounts have evidence of commercial projects and suggest one useful follow-up field. Wait for my choice before starting it.”

Connect your account

The hosted Leadbase MCP endpoint is:

https://www.leadbase.io/api/mcp

Use a client that supports remote MCP over Streamable HTTP and the Leadbase OAuth sign-in flow. Choose your workspace during authorization. If you already have the Leadbase connection in that client, reuse it.

Choose your client

Client	How to connect	Where to learn more
ChatGPT	Use the available Leadbase connection or the client's supported custom MCP connection flow	Leadbase connection guide
Claude	Use the Leadbase connector where available, or add the endpoint through supported connector settings	Leadbase connection guide
Claude Code	Add the remote HTTP MCP server and complete sign-in	Command below
Codex and Agent Plugins 1.0 clients	Use the supported plugin installation flow with this bundle	Portable manifest and MCP configuration
Cursor	Use the supported plugin import flow or add the remote MCP server	Cursor manifest and HTTP configuration
Cline	Add a native remote HTTP connection and authorize with OAuth	Cline setup guide
Gemini CLI	Install the shared extension, then authorize your Leadbase workspace	Gemini setup guide
Other compatible clients	Add the hosted endpoint using the client's remote MCP settings	General connection guide

Direct MCP connections and plugin bundles use the same Leadbase service. Public marketplace availability follows each host's publication process; the connection instructions also cover clients with a supported direct setup.

Claude Code

Add the hosted server:

claude mcp add --transport http leadbase https://www.leadbase.io/api/mcp

Then open /mcp in Claude Code and complete the Leadbase authentication flow. See the official Claude Code MCP documentation for client configuration and scope options.

HTTP configuration example

For clients using the Claude and Cursor compatibility format, the shared configuration is:

{
  "mcpServers": {
    "leadbase": {
      "type": "http",
      "url": "https://www.leadbase.io/api/mcp"
    }
  }
}

Merge the leadbase entry into your existing client configuration. Transport labels differ by format: this bundle's portable configuration uses streamable-http, while the Cline extension uses streamableHttp. Follow the guide for your client when configuring the connection.

Verify your first connection

Ask your assistant to list your accessible sheets and check the workspace balance. Then request a small research task using your own market, inspect the results and open the sheet. Complete sign-in in the host's authorization window; keep credentials out of prompts and public configuration files.

Live sheets and source evidence

A working sheet inside your research workflow

Leadbase saves results in persistent sheets. You can open a sheet, edit cells, search, filter and export the data. Add another research field when you need more context, or return later to continue with the same accounts.

Hosts with MCP Apps support can display the interactive Leadbase sheet inside the assistant. Other clients can read structured tool results and provide the link to the same sheet in Leadbase. Embedded display modes, full-screen views and sidebar pinning follow the host's available features.

Evidence your assistant can read and cite

Available sources are included with research findings, so an assistant can retrieve the evidence and cite the relevant links in an answer. Your team can inspect the source pages when checking a qualification decision.

For a useful handoff, ask for a concise conclusion, the supporting URL and any context needed to understand it. “Offers commercial maintenance” with the corresponding service page is more actionable than a standalone label.

Progress that stays connected to the result

Research status and saved findings let you follow an operation and inspect its results. For a larger request, the assistant should retrieve every result page needed for the requested scope. A research operation's completion and final credit settlement are separate states, so ask for the settled usage when reviewing cost.

Pricing and free credits

Every new Leadbase workspace starts with 200 free credits. Use them to test your own target market before choosing a paid plan.

Start with a focused task: a small company list, a contact research request or a qualification field on existing rows. Review the result quality and credit usage, then expand the workflow that fits your team.

The public plugin bundle is free to use under its MIT license. Research runs on the hosted Leadbase service using your workspace credits and plan limits. The price of a task depends on the tools and research requested. Check the current pricing for plan details and usage examples.

Create your first workspace

Considering an Apollo alternative?

If your evaluation starts with “Can this tool build the list my team actually needs?”, test Leadbase against a real brief from your market.

Bring a target account description, one qualification question and a set of fields your team would use. Assess the relevance of the companies, the usefulness of the evidence and how easily you can continue working with the results. For DACH prospecting, try a concrete regional or specialist-business use case.

The Leadbase and Apollo comparison explains the product's approach to natural-language targeting and custom account research. Explore the comparison hub for other evaluation starting points.

Frequently asked questions

What can I use the Leadbase plugin for?

Use it for B2B lead generation, company discovery, professional contact research, existing-list enrichment and custom account qualification. The same research workflow supports supplier discovery, product research and public web content.

Who is Leadbase for?

Leadbase helps founders, sales teams, agencies, consultants and researchers who need relevant accounts and useful business context. It is especially helpful when the criteria that define a good prospect need their own research questions.

Can I try Leadbase for free?

Yes. Every new workspace starts with 200 free credits. Create a workspace and try a focused task before selecting a paid plan.

Is the plugin free?

The public integration bundle is available under the MIT license. Research uses the hosted Leadbase service and your workspace credits. Your account's plan and usage terms apply to that service.

How do I control research costs?

Start with a small, clearly defined request, check the balance and review usage before expanding. Specify the number of results and the fields you actually need. Current plan details and examples are on the pricing page.

How do I create my first company list?

Describe the company type, region, result count and required fields. Ask Leadbase to save each company as a row in a new sheet. For example, request ten installers in one region with official websites and evidence of the service you care about.

Can I find companies in Germany, Austria and Switzerland?

Yes. Specify the DACH country or region and the business criteria that matter. Research regional service providers, SMEs, craft businesses and other target accounts, then qualify them in the sheet.

Can I research markets outside DACH?

Yes. Define the country or region and your research brief. Include any language or location context that helps identify the intended market.

Can I find small businesses and specialist providers?

You can describe a specialist business type and request evidence of the relevant service or customer focus. Start with a narrow geography and a small sample to evaluate how the results fit your niche.