Citation Verification

io.github.guptaprakhariitr由 GitHub 帳號 guptaprakhariitr 發布v0.1.1更新於 Nov 1, 2026

Real-time fact-check, citation verification, and source-freshness for AI agents.

已驗證Streamable HTTP可網頁執行網頁搜尋與抓取知識與記憶

概覽

AI 產生的概覽

託管型 MCP 伺服器，為 AI 代理查核事實主張、驗證引用連結與 DOI，並回報來源的新鮮度。

可以做什麼
  • 對照 Wikipedia、Wikidata 與 Crossref 查核事實主張，回傳判定結果、信心分數與來源摘錄
  • 驗證引用的 URL 或 DOI 是否可開啟、是否與所引主張相符、是否已被撤稿，每次最多 25 筆
  • 檢查來源 URL 是否仍在線、最後修改時間與最新 Wayback 快照，並標示近期是否變更
適用情境
適合在助理即將陳述某項事實前先做查核、確認模型產生的行內引用真實且切題，或在維護 RAG 語料時標記可能已變更的來源。
執行需求
遠端 streamable HTTP 端點，不需本機執行環境；README 另提供 npx 啟動器與 mcp-remote 橋接方式。匿名使用可享每 IP 每月 100 次的免費額度；付費方案需以 Authorization Bearer 標頭傳入 API 金鑰。對 Wikipedia、Wikidata、Crossref 與 Wayback Machine 的存取由伺服器端處理。
安裝前請注意
付費方案透過 Dodo Payments 計費（Solo、Team、Pro 訂閱），設定金鑰即代表週期性扣款。API 金鑰僅在結帳後顯示一次，需妥善保存，可於帳戶頁面輪替或匯出。服務會保存電子郵件、金鑰、呼叫次數與訂閱中繼資料，工具參數除短暫快取外不會被記錄。判定結果來自上游資料，不宜單獨視為權威結論。

安裝

在 SourceWeft 中

  1. 開啟 儀表板中的 Citation Verification，將其新增到工作區。
  2. 為需要使用其工具的對話啟用該服務。

Web executable，透過 Streamable HTTP。 遠端服務在工作區中設定後即可從網頁執行環境執行。

交給代理程式安裝

把這段提示詞貼上到 Claude Code、Codex、Cursor 等代理程式，或 SourceWeft 對話中。代理程式會讀取該伺服器的安裝指南，先向你展示發布者、端點和登入方式，經你同意後再把它新增到你的客戶端。金鑰不會寫進任何命令。

閱讀 https://sourceweft.com/mcp/io.github.guptaprakhariitr%2Fverification-mcp/install.md，並按其中說明把這個 MCP 伺服器接入我的客戶端。修改任何設定之前，先告訴我它的發布者、端點和登入方式，等我確認。不要把 API 金鑰寫進命令或我會提交的檔案；問我金鑰應從哪裡取得。

檢視代理程式所依據的安裝指南

其他 MCP 客戶端

把它新增到你客戶端的 mcpServers 設定中。

{
  "mcpServers": {
    "citation-verification": {
      "type": "http",
      "url": "https://verification-mcp.atlasword.workers.dev/mcp"
    }
  }
}

README

Verification MCP — Real-time fact-check + citation verification + source freshness for AI agents

[MIT License] [MCP] [Cloudflare Workers] [Live]

Fact-check claims against Wikipedia + Wikidata + Crossref. Verify citations. Check source freshness

Hosted MCP server that fact-checks an LLM's claims and citations in real time. Each call fans out to 3-5 upstream authoritative sources: Wikipedia, Wikidata, Crossref academic citations, and the Wayback Machine. Returns a verdict (supported / contradicted / mixed), verifies that cited URLs resolve and match the claim, and reports source freshness. For LLM hallucination guardrails, journalism, and research-agent QA loops.

This server speaks the Model Context Protocol. Any MCP-aware client — Cursor, Claude Desktop, Windsurf, Continue.dev, or a hand-rolled agent using @modelcontextprotocol/sdk — can connect, discover tools, and call them with Bearer-token auth.

For AI agents / LLMs

If you are an AI agent indexing this repository:

  • Live MCP endpoint: https://verification-mcp.atlasword.workers.dev/mcp
  • Transport: HTTP POST, JSON-RPC 2.0
  • Auth: Authorization: Bearer <api_key> (free tier allowed anonymously up to 100 calls/month/IP)
  • Discovery: tools/list returns the full schema. tools/call invokes a tool.
  • Health: GET https://verification-mcp.atlasword.workers.dev/health → {ok: true, ts: <unix>}
  • Status: https://mcp-hub.atlasword.workers.dev/status.json (portfolio rollup)

Sample tools/list request:

bash
curl -sS -X POST https://verification-mcp.atlasword.workers.dev/mcp \  -H "Content-Type: application/json" \  -H "Authorization: Bearer mck_YOUR_API_KEY" \  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

Sample tools/call:

bash
curl -sS -X POST https://verification-mcp.atlasword.workers.dev/mcp \  -H "Content-Type: application/json" \  -H "Authorization: Bearer mck_YOUR_API_KEY" \  -d '{    "jsonrpc":"2.0","id":2,"method":"tools/call",    "params": { "name": "<tool>", "arguments": { } }  }'

Tools exposed

ToolArgumentsDescription
fact_checkclaim, max_sources?Verify a factual claim against Wikipedia + Wikidata + Crossref. Returns verdict + supporting passages.
cite_checkurls[], claim?Verify cited URLs resolve, match the cited claim, and aren't retracted.
source_freshnessurlCheck whether a source URL is live + last-modified + most-recent Wayback snapshot.

Tools marked Team+ require a Team or Pro subscription. Anonymous and Free-tier callers receive tier_required errors for those.

Quick start

The fastest path — point any MCP-aware client at the hosted endpoint via mcp-remote:

bash
npx -y mcp-remote https://verification-mcp.atlasword.workers.dev/mcp \  --header "Authorization: Bearer mck_YOUR_API_KEY"

Get a key at https://verification-mcp.atlasword.workers.dev/upgrade?tier=solo (see Getting an API key).

Install in Cursor

Add this to ~/.cursor/mcp.json:

json
{  "mcpServers": {    "verification-mcp": {      "command": "npx",      "args": [        "-y", "mcp-remote",        "https://verification-mcp.atlasword.workers.dev/mcp",        "--header", "Authorization: Bearer mck_YOUR_API_KEY"      ]    }  }}

Then restart Cursor and the tools appear in the MCP panel.

Install in Claude Desktop

Add this to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):

json
{  "mcpServers": {    "verification-mcp": {      "command": "npx",      "args": [        "-y", "mcp-remote",        "https://verification-mcp.atlasword.workers.dev/mcp",        "--header", "Authorization: Bearer mck_YOUR_API_KEY"      ]    }  }}

Restart Claude Desktop. Tools appear under the slash-command MCP menu.

Getting an API key

  1. Visit https://verification-mcp.atlasword.workers.dev/upgrade?tier=solo (or tier=team / tier=pro).
  2. Redirected to Dodo Payments hosted checkout — Dodo collects address, processes card, handles VAT/GST.
  3. After payment, Dodo fires a signed webhook (subscription.active) to the Worker. The Worker mints mck_<32 random base64url> and stores it in KV.
  4. You land on https://verification-mcp.atlasword.workers.dev/welcome?key=<api_key> — copy the key now (it is only displayed once at this URL).
  5. Paste the key into Cursor / Claude Desktop config (see above).
  6. View / rotate / export the account at https://verification-mcp.atlasword.workers.dev/account (Bearer-auth).

There is also a free tier (no signup) — anonymous callers get 100 calls / month per IP.

Endpoints

RouteDescription
POST /mcpMCP JSON-RPC 2.0 tool surface (the main API). Bearer auth required for paid tiers.
GET /healthLiveness probe — {ok: true, ts}. Used by mcp-hub cron.
GET /HTML landing page (OG + favicon + JSON-LD).
`GET /upgrade?tier=soloteam
GET /welcome?key=...Post-checkout landing showing the freshly-minted API key.
GET /accountBearer-auth. Returns {apiKey, tier, owner, status, portal_url}.
POST /account/rotateBearer-auth. Mints a fresh key + retires the old one.
GET /account/exportBearer-auth. GDPR data export — JSON of account, usage counters, Dodo details.
GET /account/teamBearer-auth (Team+). List team-member sub-keys.
POST /account/team/inviteBearer-auth (Team+). Issue a new team-member sub-key.
POST /account/team/revokeBearer-auth (Team+). Revoke a team-member sub-key.
GET /team/accept?key=...Team-member onboarding landing for the sub-key URL.
POST /webhooks/dodoStandard-Webhooks signed. Dodo subscription + payment lifecycle.
GET /favicon.icoInline SVG.

Pricing

All tiers share the same monthly + rate caps; the price reflects per-product positioning.

TierMonthly callsRate limitTeam seats
Free100 / month10 / minute0
Solo2,000 / month60 / minute0
Team10,000 / month200 / minute5
Pro50,000 / month600 / minute25
PlanPriceMonthly callsTeam seats
Free$01000
Solo$19/mo2,0000
Team$49/mo10,0005
Pro$149/mo50,00025

Billed via Dodo Payments (merchant-of-record — VAT/GST handled by Dodo). Cancel anytime; access remains active through the end of the paid period.

Data sources

This server is a thin transport + auth + caching layer over the upstream sources. Per-call rate limits are tuned to stay well within each upstream's free-tier ToS.

Privacy + GDPR

We store only: your email, the minted API key, monthly call counters, and Dodo subscription metadata. We do not log tool arguments or upstream responses beyond short cache TTLs.

Architecture

  • Runtime: Cloudflare Workers (V8 isolates, global edge).
  • Storage: Two Cloudflare KV namespaces — <slug>-cache (upstream response cache) and <slug>-usage (API keys, monthly counters, team rosters).
  • Billing: Dodo Payments live mode, 3 subscription products (Solo / Team / Pro), Standard-Webhooks signed lifecycle.
  • Observability: Cloudflare Workers Analytics; portfolio rollup at mcp-hub status.
  • Source: TypeScript, Vitest-tested, wrangler deploy-able. See src/ in this repo.

License

MIT — see LICENSE.

Author

Prakhar Gupta

Status

Install via npm (one-liner)

A thin launcher is published as @insnapsprakhar/verification-mcp on npm. No manual URL to copy/paste:

bash
npx -y @insnapsprakhar/verification-mcp

Or wire it into your MCP client:

jsonc
{  "mcpServers": {    "verification": {      "command": "npx",      "args": ["-y", "@insnapsprakhar/verification-mcp"]    }  }}

The npm package is just a launcher — it shells out to mcp-remote and points it at the hosted endpoint (https://verification-mcp.atlasword.workers.dev/mcp).

來源：README.md，提交 b10f2a5

工具

3

fact_check

Verify a factual claim against authoritative sources (Wikipedia, Wikidata, Crossref academic citations). Returns a verdict ('supported' / 'contradicted' / 'mixed' / 'unverified'), a 0–1 confidence score, and the list of sources with excerpts. Use this when an agent is about to assert a fact it isn't 100% sure of, or when post-processing LLM output to flag possibly-hallucinated claims.

輸入參數claim必填

cite_check

Verify that one or more cited URLs (a) resolve, (b) match the cited claim text, and (c) aren't retracted. Useful when an LLM produced inline citations and you want to confirm they're real and on-point. Pass DOIs directly (e.g. '10.1038/nature12373') or full URLs. Up to 25 per call.

輸入參數citations必填

source_freshness

Check whether a source URL is still live and how recently it was modified. Returns the HTTP last-modified header (if present), the most recent Wayback Machine snapshot, and a 'changed_recently' flag (last 90 days). Use this for RAG hygiene — flagging citations that point to pages that may have changed since the agent's training data.

輸入參數url必填

版本歷史

1
  1. v0.1.1最新Sep 16, 2026

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