Citation check MCP

This MCP server allows agents to verify whether a specific URL supports a given claim. It charges 0.08 credits per successful call and requires an API key for authentication via the X-API-Key header.

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Community listingStreamable HTTPNo sign-inEndpoint checked 2026-11-06Published by Best Smart Goods

You need:Get a key: https://firm.bestsmartgoods.com/signupAuth header: X-API-Key: ak_...

MCP endpoint (Streamable HTTP)

https://cite.bestsmartgoods.com/mcp

Vendor documentation

What its tools do

1 tool, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

Read-only (1)

check_citation

1 of 1 have a description · 1 of 1 declare behavior hints · 1 of 1 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

Passed Endpoint answered the live check · Nov 6, 2026, 11:12 PM UTC
Availability 1 of 1 checks passed in 30 days

What you can do with it

Check if a URL supports a specific claim
Verify factual assertions against web sources

Source and maintenance

Community listingRegistry 1.0.1

mcp-registry: io.github.ladanyin/citation-check@1.0.1 Source repository Project website

Maintenance checked: Nov 6, 2026, 10:43 PM UTC

Protocol and capabilities

Server: citecheck 0.1.0
MCP protocol negotiated in check: 2025-11-25
Tools: 1 advertised
Resources: Not advertised
Resource templates: Not advertised
Prompts: Not advertised

Server-advertised capabilities

{
  "tools": {}
}

Tools

1 advertised

check_citation — Check a citation

Advertised by the server during the last successful anonymous check.

Advertised read-onlyOpen-world

Check whether one public page supports one claim. Returns verdict supported, partially_supported, unclear, or unsupported, plus score, confidence, page_title, and method. score is the share of claim words found on the page, from 0 to 1, not a legal grade. Costs 0.08 credit only after the page is fetched. invalid_url and fetch_failed are not charged. Use it with one public http or https URL and one statement. Do not use it for login pages, files, or as legal advice. A low score means few claim words appear on the page. Key: https://firm.bestsmartgoods.com/signup

check_citation input schema

{
  "type": "object",
  "required": [
    "claim",
    "url"
  ],
  "properties": {
    "url": {
      "type": "string",
      "description": "Public http or https page. Login walls, localhost, and non-http URLs return invalid_url or fetch_failed and are not charged."
    },
    "claim": {
      "type": "string",
      "description": "One statement to compare with the page text. Short factual sentences score more clearly than long quotes."
    }
  }
}

check_citation output schema

{
  "type": "object",
  "properties": {
    "ok": {
      "type": "boolean",
      "description": "False for invalid_url or fetch_failed. Those calls are not charged."
    },
    "url": {
      "type": "string"
    },
    "claim": {
      "type": "string"
    },
    "error": {
      "enum": [
        "invalid_url",
        "fetch_failed"
      ],
      "type": "string",
      "description": "Present only when ok is false."
    },
    "score": {
      "type": "number",
      "description": "Share of claim words found on the page, from 0 to 1."
    },
    "method": {
      "type": "string",
      "const": "heuristic"
    },
    "verdict": {
      "enum": [
        "supported",
        "partially_supported",
        "unclear",
        "unsupported"
      ],
      "type": "string",
      "description": "supported at score 0.55 or more, partially_supported at 0.30, unclear at 0.15, otherwise unsupported."
    },
    "confidence": {
      "type": "number",
      "description": "Between 0.30 and 0.85, rising with score."
    },
    "page_title": {
      "type": "string",
      "description": "HTML title, empty when the page has none."
    },
    "credits_remaining": {
      "type": "number",
      "description": "Present only after a charged, successful check."
    }
  }
}

check_citation annotations

{
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

90-day uptime

A lightweight connection check about every six hours, sampled on hosts with many listings. It shows the server answered, not that its tools work.

Too few checks for a percentage yet (2 of 2 answered).

2026-11-07: 2 of 2 checks answered

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks: 1 of 1 (100%)
Average latency: 971 ms
95th percentile latency: 971 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

Nov 6, 2026, 11:12 PM UTC · probe · passed · 971 ms · metadata changed · 1 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http citation-check-mcp https://cite.bestsmartgoods.com/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add citation-check-mcp --url https://cite.bestsmartgoods.com/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable citation-check-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "citation-check-mcp": {
      "url": "https://cite.bestsmartgoods.com/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).

Cline configuration

{
  "mcpServers": {
    "citation-check-mcp": {
      "type": "streamableHttp",
      "url": "https://cite.bestsmartgoods.com/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start citation-check-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "citation-check-mcp": {
      "type": "http",
      "url": "https://cite.bestsmartgoods.com/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http citation-check-mcp https://cite.bestsmartgoods.com/mcp

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.

Claude Desktop configuration

https://cite.bestsmartgoods.com/mcp

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "citation-check-mcp": {
      "serverUrl": "https://cite.bestsmartgoods.com/mcp"
    }
  }
}

Let your agent find its tools

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