crosscheck

com.crosscheckapi由 crosscheckapi.com 發布官方發布者v0.6.0更新於 Oct 25, 2026

Checks for AI agents over x402: review drafts, accept-check handoffs, scan skills before install.

已驗證Streamable HTTP可網頁執行金融開發者工具安全與監控

概覽

AI 產生的概覽

一個獨立審查服務，讓助理在行動前檢查草稿、代理交付物和技能檔案，按次透過 x402 以 USDC 付費。

可以做什麼
審查電子郵件、報告或 PR 描述等草稿，回傳通過或具體問題與修正建議，可對照原始請求與來源，並附簽章回執及免費的回執驗證工具。在付款或轉交前，依任務驗收另一個代理交付的工作。安裝前對技能或 MCP 伺服器的檔案做唯讀安全審查，可依套件雜湊免費查詢先前的掃描結果。面向 x402 賣家，對自有付費資源產出附日期的報告，並連續 30 天每小時監控、變更時告警。查詢先前付費呼叫的狀態、結論與回執。
適用情境
適合在助理產出將由人閱讀的文字時取得第二意見，檢查算術、矛盾、佔位符、外洩的密鑰或提示注入；也適合在付款前判斷其他代理的交付物，或在安裝前審查技能。
執行需求
可作為遠端端點執行，也可透過 npx 作為本機 npm 套件執行。付費工具需要 CROSSCHECK_WALLET_KEY，即一個專用 EVM 錢包的私鑰，錢包內需有少量 Base 上的 USDC；也可改用 Base Sepolia 的測試 USDC。選用設定包括 CROSSCHECK_MAX_USD、CROSSCHECK_NETWORKS 和 CROSSCHECK_URL。無需帳號或 API 金鑰，但需要網路存取。
安裝前請注意
付費工具每次呼叫會花費真實 USDC，約 0.02 至 0.06 美元，每個來源網址另加 0.01 美元；CROSSCHECK_MAX_USD 可限制單次費用。CROSSCHECK_WALLET_KEY 是私鑰，應使用餘額很少的專用錢包，切勿使用主錢包。草稿會傳送給該服務及其審查模型，完成後刪除，僅保留雜湊；不要傳送機密文字。sellerwatch 會向你設定的 webhook 或 ntfy 主題推送告警。

安裝

在 SourceWeft 中

  1. 開啟 儀表板中的 crosscheck，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/com.crosscheckapi%2Fcrosscheck/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": {
    "crosscheck": {
      "type": "http",
      "url": "https://crosscheckapi.com/mcp"
    }
  }
}

README

crosscheckapi

An independent second opinion on a draft before your human sees it.

Your agent sends the text it wrote: an email, report, message, PR description, or summary. crosscheck returns a JSON verdict, either pass or a list of specific issues with fixes, plus an Ed25519-signed receipt. It catches wrong arithmetic (checked in code, not by the model), contradictions, leftover placeholders, leaked secrets, unauthorized commitments, and prompt injection. Each check costs $0.02 in USDC on Base for up to 12,000 units (one per English character), paid per request over x402. There is no account and no API key.

To try it without real money, pay with test USDC on Base Sepolia (free at https://faucet.circle.com) and set CROSSCHECK_NETWORKS=eip155:84532.

MCP server

json
{  "mcpServers": {    "crosscheck": {      "command": "npx",      "args": ["-y", "crosscheckapi"],      "env": { "CROSSCHECK_WALLET_KEY": "0x<private key of a dedicated wallet>" }    }  }}

Tools:

  • quote: free. The price for a draft, and whether checks are available now.
  • order: pays the quoted price and returns the verdict and signed receipt. Pass moltbook_identity to use a free check if you are a verified Moltbook agent. Optional: request (what your human asked, word for word; the draft fails if it answers a different question or leaves part out), sources (text the draft relies on), source_urls (up to 3 pages crosscheck opens and checks the draft against, +$0.01 each), and fetch_cited (also open the draft's own links).
  • accept: pays about $0.03 and checks work another agent or service handed back against the task you gave it. Returns accept or reject with each requirement judged, before you pay for the work or pass it on.
  • skillcheck: security-checks a skill or MCP server folder before you install it. Free when someone already scanned the same files, otherwise about $0.03.
  • result: free. Status, verdict, and receipt of an earlier order.

CLI

bash
npx -p crosscheckapi crosscheck quote draft.txtnpx -p crosscheckapi crosscheck order draft.txtnpx -p crosscheckapi crosscheck accept task.txt deliverable.txtnpx -p crosscheckapi crosscheck skillcheck ./some-skillnpx -p crosscheckapi crosscheck result <job_id> <result_token>npx -p crosscheckapi crosscheck credits [wallet]npx -p crosscheckapi crosscheck order draft.txt --request "What will 12 seats cost per year?" --url https://example.com/pricing

The draft is read from the file, or from stdin if no file is given. Output is JSON.

Referrals: the paid commands (order, accept, skillcheck) take --ref <receipt hash>, the id in a crosscheck proof link (/r/<hash>) that led you here. When your wallet's first check paid in real USDC carries a ref, the wallet behind that receipt earns check credits worth 20% of what you pay for 90 days; it costs you nothing. --credits pays with your own wallet's referral credits by signing a credit order instead of paying, and falls back to USDC only when the credits do not cover the price. crosscheck credits shows your balance. The MCP tools take the same options as ref and credits, and add a free credits tool.

Settings

VariableMeaning
CROSSCHECK_WALLET_KEYPrivate key of the wallet that pays. Use a dedicated wallet holding a few dollars, never your main wallet. Only needed for paid orders.
CROSSCHECK_MAX_USDRefuse to pay more than this per check. Default 0.10.
CROSSCHECK_URLService URL. Default https://crosscheckapi.com.
CROSSCHECK_NETWORKSNetworks the client may pay on, in order of preference. Default eip155:8453,eip155:84532 (Base, then Base Sepolia). Set eip155:84532 to use test USDC only.

Receipts

Every paid check returns receipt with body, hash, and sig. The client verifies it automatically against the public key at https://crosscheckapi.com/.well-known/crosscheck-keys.json and reports receipt_check.valid. The receipt covers a SHA-256 of your draft (never the text), the payment, and a SHA-256 of the verdict, and it is chained into an append-only ledger.

Privacy

The draft is sent to crosscheck and to its review model, then deleted when the check finishes. Only its hash is kept. Do not send text your human has marked confidential.

Source, examples for Claude Code, Cursor, VS Code, OpenAI Agents SDK, LangChain, and more: https://github.com/maxugc/crosscheck

Service summary for agents: https://crosscheckapi.com/llms.txt

來源：client/README.md，提交 f67118f

工具

8

check

Review a draft

Independent review of a draft (email, report, summary, PR description) before its human sees it. Returns pass or specific issues with fixes; arithmetic is recomputed in code. With request (what the human asked), it also checks the draft answers that. With sources, each claim is checked against them and quotes are verified; with source_urls or fetch_cited, crosscheck fetches up to 3 web pages itself and checks against those (+$0.01 a page, and a dead link the draft gives fails it). $0.02. Paid per call in USDC over x402 (Base, or free test USDC on Base Sepolia). An x402-aware MCP client pays automatically: the first call returns the price as an x402 PaymentRequired error, and the retry carries the payment in _meta["x402/payment"]. Without one, use the npm client `npx -y crosscheckapi`, which pays from a wallet you set.

輸入參數refdraft必填requestsourcesfetch_citedopen_reviewsource_urlsmoltbook_identity

accept

Check a deliverable against its task

Checks work another agent handed back against the task it was given, before you pay, release escrow, or pass it on. Returns accept, reject, or verify_externally with every requirement judged; counts, required JSON fields, and sums are checked in code. Optional payment_tx is verified on chain. $0.03 base. Paid per call in USDC over x402 (Base, or free test USDC on Base Sepolia). An x402-aware MCP client pays automatically: the first call returns the price as an x402 PaymentRequired error, and the retry carries the payment in _meta["x402/payment"]. Without one, use the npm client `npx -y crosscheckapi`, which pays from a wallet you set.

輸入參數reftask必填referencepayment_txdeliverable必填payment_network

skillcheck

Security review of a skill or MCP server

Security review of a skill or MCP server's files before you install or connect it: read, never run. Free when these exact files were scanned before (looked up by bundle hash); otherwise paid, $0.03 base. Never says safe. Paid per call in USDC over x402 (Base, or free test USDC on Base Sepolia). An x402-aware MCP client pays automatically: the first call returns the price as an x402 PaymentRequired error, and the retry carries the payment in _meta["x402/payment"]. Without one, use the npm client `npx -y crosscheckapi`, which pays from a wallet you set.

輸入參數reffiles必填fresh

sellercheck

Check an x402 seller's resource

For x402 sellers: one dated report on your own paid resource, by code alone. Does it answer a valid 402 (v1 or v2: price, network, payTo), is it in the x402 Bazaar index, would agent402's router route to it, and how many USDC settlements reached its payTo on Base in 24 hours and 7 days. Nothing is paid to the resource. $0.05. Paid per call in USDC over x402 (Base, or free test USDC on Base Sepolia). An x402-aware MCP client pays automatically: the first call returns the price as an x402 PaymentRequired error, and the retry carries the payment in _meta["x402/payment"]. Without one, use the npm client `npx -y crosscheckapi`, which pays from a wallet you set.

輸入參數methodnetworkresource必填

sellerwatch

Watch an x402 resource for 30 days

For x402 sellers: sellercheck every hour for 30 days on one resource, paid once. An alert to your webhook (JSON POST) or ntfy topic only when something changes: the 402 breaks or its price or payTo change, it leaves or rejoins the Bazaar index, agent402's router flips, settlements start, double, or halve, or it is down twice in a row. Returns a public record page to link from your listing. $1. Paid per call in USDC over x402 (Base, or free test USDC on Base Sepolia). An x402-aware MCP client pays automatically: the first call returns the price as an x402 PaymentRequired error, and the retry carries the payment in _meta["x402/payment"]. Without one, use the npm client `npx -y crosscheckapi`, which pays from a wallet you set.

輸入參數methodnotify必填networkresource必填

skillcheck_lookup

Look up a past skillcheck

Free. The latest skillcheck of an exact bundle, by its bundle_sha256 (SHA-256 of the canonical JSON of the files sorted by path, each as {path, sha256}).

輸入參數bundle_sha256必填

verify_receipt

Verify a crosscheck receipt

Free. Before trusting work that arrives with a crosscheck receipt, check in code that crosscheck issued it, its signature is valid, what the outcome was, and that it covers exactly the text you were handed. Pass receipt_hash (or the receipt object) plus that text: draft, request, and sources for check, task and deliverable for accept, files for skillcheck, and the verdict if one came with it.

輸入參數taskdraftfilesreceiptrequestsourcesverdictdeliverablereceipt_hash

result

Get a result

Free. Status, verdict, and signed receipt of an earlier paid call that was still running, using the job_id and result_token it returned.

輸入參數job_id必填result_token必填

版本歷史

7
  1. v0.6.0最新Oct 25, 2026
  2. v0.5.5Sep 28, 2026
  3. v0.5.4Sep 25, 2026
  4. v0.5.3Sep 25, 2026
  5. v0.5.1Sep 25, 2026
  6. v0.2.1Sep 24, 2026
  7. v0.2.0Sep 24, 2026

評分

已滿足適用檢查項的 100%

該評分衡量此收錄條目的完整程度，依據註冊中心條目、端點與公開來源計算得出。它不是對伺服器本身的評價，也不表示伺服器安全或目前可用：可連通性是帶日期的檢查結果，評分也不包含安裝量或使用者評價。

  • 近 30 天內可連通必需25 分
  • 已宣告認證方式必需10 分
  • 已列出工具必需15 分
  • 描述必需15 分
  • 圖示10 分
  • 文件15 分
  • 授權條款10 分