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io.github.si-imtiaz/leadquasar

by si-imtiaz · remote · no sign-in to list tools · v1.0.0 · published by GitHub user si-imtiaz

Counts and firmographics for 7.5M+ verified US B2B businesses, by industry, state and city.

Read only
CompareRegistry entry

3 tools: 3 only read.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http leadquasar https://leadquasar.com/api/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

3 tools

Only reads 3Claude Code: allow
  • count_businessesCount verified B2B businesses in the LeadQuasar database matching an industry, country, US state and/or city, with how many have an email address and a phone number.Reads private dataReads text others writeNo findings

    Why it is in this group

    • The name "count_businesses" says "count": a word for reading.

    What it can reach

    • private-dataThe description's first sentence says "count" and "database": it reads databases.
    • untrusted-inputThe description's first sentence says "count" and "email": it reads inbound email, which other people can write.
    Description, as the server wrote it
    Count verified B2B businesses in the LeadQuasar database matching an industry, country, US state and/or city, with how many have an email address and a phone number. Use this to answer questions like 'how many managed service providers are there in Texas', 'how many dentists in Chicago have a business email' or 'how many movers are there in London' (country GB). Returns real counts from 9.5 million+ live records, most of them US.

    Annotations the server declares

    • title: Count businesses
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • list_industriesList the industries LeadQuasar covers and how many verified businesses each holds.No findings

    Why it is in this group

    • The name "list_industries" says "list": a word for reading.
    Description, as the server wrote it
    List the industries LeadQuasar covers and how many verified businesses each holds. Use this first when unsure what industry wording will match.

    Annotations the server declares

    • title: List industries
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • search_businessesReturn a sample of matching businesses with industry, location and data-quality signals.No findings

    Why it is in this group

    • The name "search_businesses" says "search": a word for reading.
    Description, as the server wrote it
    Return a sample of matching businesses with industry, location and data-quality signals. Contact details (name, company, email, phone, address) are never returned by this tool — it shows what exists and how reachable it is, not who to call.

    Annotations the server declares

    • title: Sample matching businesses
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged outbound.

Reads private data1
Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write1
Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
Can send data out0
Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http leadquasar https://leadquasar.com/api/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__leadquasar__count_businesses",
      "mcp__leadquasar__search_businesses",
      "mcp__leadquasar__list_industries"
    ],
    "ask": [],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as leadquasar. Review it before you use it.

Capability tags behind 1 rule
  • mcp__leadquasar__count_businesses private-data, untrusted-input