io.github.si-imtiaz/leadquasar
REMOTE · LEADQUASAR.COM
Counts and firmographics for 7.5M+ verified US B2B businesses, by industry, state and city.
Available components
Last scanned (2 hours ago)
Scores higher than 89% of remote servers
Reachable. Last reached 5 Nov 2026.
Category CRM and Sales
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security80
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability63
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 1330 tokens (~332/item across 4 items; 4 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 4 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 5 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities60
- Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28. See how to fix → Fail
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 5 Nov 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Tool “count_businesses” rewrote its description, which is the text the model reads security
- Tool “search_volume” rewrote its description, which is the text the model reads security
- “search_volume” reworded the description of “location” cosmetic
- 4 Nov 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Tool “count_businesses” rewrote its description, which is the text the model reads security
- “count_businesses” reworded the description of “country” cosmetic
- “search_businesses” reworded the description of “country” cosmetic
- 3 Nov 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Tool “count_businesses” rewrote its description, which is the text the model reads security
- Schema quality: 940 → 1247 ▼ functional
- New tool “search_volume” functional
- “count_businesses” reworded the description of “country” cosmetic
- “search_businesses” reworded the description of “country” cosmetic
- 28 Oct 26 0
- The server rewrote its instructions, which are the text every model session reads security
- “count_businesses” reworded the description of “country” cosmetic
- “search_businesses” reworded the description of “country” cosmetic
- 27 Oct 26 0
- The server rewrote its instructions, which are the text every model session reads security
- 23 Oct 26 0
- Tool “count_businesses” rewrote its description, which is the text the model reads security
- 20 Oct 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Tool “count_businesses” rewrote its description, which is the text the model reads security
- “count_businesses” reworded the description of “country” cosmetic
- “search_businesses” reworded the description of “country” cosmetic
- 19 Oct 26 0
- Tool “count_businesses” rewrote its description, which is the text the model reads security
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 5 Nov 2026 · Probed https://leadquasar.com/api/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_256_GCM_SHA384 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=leadquasar.com | CN=YE2,O=Let's Encrypt,C=US | 15 Sept 2026 | 14 Dec 2026 | ECDSA 256 | ECDSA-SHA384 | 516b29302a93c6506984c9320c849d006ae |
| SANs: leadquasar.com, www.leadquasar.com | ||||||
| CN=YE2,O=Let's Encrypt,C=US (CA) | CN=Root YE,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | ECDSA 384 | ECDSA-SHA384 | 4df3b15dd6c0784c507cd37b58e6f115 |
| CN=Root YE,O=ISRG,C=US (CA) | CN=ISRG Root X2,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | ECDSA-SHA384 | 872165fc34b6e5fba8add5b3705fb53a |
| CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | SHA256-RSA | 6c8f1dc727c7117f7baf853ac980f9cd |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of leadquasar.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| leadquasar.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=31536000 |
| x-content-type-options | nosniff |
| x-frame-options | SAMEORIGIN |
| referrer-policy | strict-origin-when-cross-origin |
| permissions-policy | camera=(), geolocation=(), microphone=(self) |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://leadquasar.com/api/mcp | Verified | 200 | |
| http (plaintext) | http://leadquasar.com/api/mcp | HTTPS enforced | 301 | https://leadquasar.com/api/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
count_businesses Count businesses ~477
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 10.5 million+ live records, most of them US.
| Name | Type | Req | Description |
|---|---|---|---|
| city | string | – | City name, e.g. "Chicago", or "London" with country GB. |
| country | string | – | Country, as an ISO code ("US", "GB", "CA") or a name ("United Kingdom"), or "all". This server never guesses the user's location (a request reaches it from the AI client's servers, not the user), so… |
| industry | string | – | Industry or business type in plain words, e.g. 'managed service provider', 'dentist', 'HVAC contractor', 'plumbers'. Everyday wording is resolved to the stored categories, so 'HVAC contractor' finds… |
| no_website | boolean | – | true = only businesses whose Google Maps listing shows no website of their own (read from the listing; a Facebook-only listing counts as none). For questions like 'plumbers in the UK without a websit… |
| state | string | – | US state, either full name ("Texas") or two-letter code ("TX"). US only. |
No output schema declared.
No examples provided.
list_industries List industries ~36
List the industries LeadQuasar covers and how many verified businesses each holds. Use this first when unsure what industry wording will match.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
search_businesses Sample matching businesses ~416
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.
| Name | Type | Req | Description |
|---|---|---|---|
| city | string | – | City name, e.g. "Chicago", or "London" with country GB. |
| country | string | – | Country, as an ISO code ("US", "GB", "CA") or a name ("United Kingdom"), or "all". This server never guesses the user's location (a request reaches it from the AI client's servers, not the user), so… |
| industry | string | – | Industry or business type in plain words. Everyday wording is resolved to the stored categories, and `matchedIndustry` in the response says which one. |
| limit | number | – | How many rows to return, 1-25. Defaults to 10. |
| no_website | boolean | – | true = only businesses whose Google Maps listing shows no website of their own (read from the listing; a Facebook-only listing counts as none). For questions like 'plumbers in the UK without a websit… |
| state | string | – | US state, either full name ("Texas") or two-letter code ("TX"). US only. |
No output schema declared.
No examples provided.
search_volume Keyword search volume ~250
How many people search Google each month for a keyword in a city, region or country (via LeadQuasar KeywordQuasar), with up to 3 related searches and how many matching businesses LeadQuasar holds there. Use this to answer questions like 'how many people search for plumber in Austin' or 'search volume for wedding photographer in Manchester'. When the place name matches several places the response lists them under `choose`: ask the user which, then call again with that place's geoId. Each connection has a few lookups a day; quote `source` and give `link` with the numbers. Contact details are never returned.
| Name | Type | Req | Description |
|---|---|---|---|
| country | string | – | Optional two-letter ISO country code ("US", "GB", "DE") to narrow the place. |
| geoId | string | – | Only a geoId from a `choose` list this tool returned, after the user picked one. |
| keyword | string | yes | The search term, e.g. "plumber" or "emergency plumber". 2 to 80 characters. |
| location | string | yes | A city, region or country, e.g. "Austin, TX", "Manchester", "Germany". Any country. |
No output schema declared.
No examples provided.
How do I install the io.github.si-imtiaz/leadquasar MCP server?
io.github.si-imtiaz/leadquasar is a hosted endpoint at https://leadquasar.com/api/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · leadquasar.com
claude mcp add --transport http si-imtiaz-leadquasar 'https://leadquasar.com/api/mcp'
What is the io.github.si-imtiaz/leadquasar MCP server?
io.github.si-imtiaz/leadquasar is an MCP server listed in the public MCP registry as io.github.si-imtiaz/leadquasar. Counts and firmographics for 7.5M+ verified US B2B businesses, by industry, state and city. This page covers its hosted endpoint (https://leadquasar.com/api/mcp).
Is the io.github.si-imtiaz/leadquasar MCP server safe to use?
io.github.si-imtiaz/leadquasar scores 84 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the io.github.si-imtiaz/leadquasar MCP server expose?
io.github.si-imtiaz/leadquasar exposes 4 tools: count_businesses, search_businesses, search_volume, list_industries. Their descriptions and schemas cost roughly 1,179 tokens of context every time the server is loaded.
Does the io.github.si-imtiaz/leadquasar MCP server require authentication?
No. We connected to io.github.si-imtiaz/leadquasar without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the io.github.si-imtiaz/leadquasar MCP server still maintained?
io.github.si-imtiaz/leadquasar is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.