crosscheck

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

• Connection: Computer or cloud
• Transport: stdio, Streamable HTTP
• Category: Other
• You need to fill in: CROSSCHECK_WALLET_KEY

Install

Pick the AI app you use, then copy the settings.

You need

• Runs in the cloudNothing to install; it connects over the internet
• npmNode.js installed (for the npx command)

Which app do you use?

https://crosscheckapi.com/mcp

{
  "mcpServers": {
    "crosscheck": {
      "command": "npx",
      "args": [
        "-y",
        "crosscheckapi"
      ],
      "env": {
        "CROSSCHECK_WALLET_KEY": "your-value",
        "CROSSCHECK_MAX_USD": "your-value",
        "CROSSCHECK_NETWORKS": "your-value"
      }
    }
  }
}

claude mcp add --transport http crosscheck https://crosscheckapi.com/mcp

claude mcp add crosscheck --env CROSSCHECK_WALLET_KEY=your-value --env CROSSCHECK_MAX_USD=your-value --env CROSSCHECK_NETWORKS=your-value -- npx -y crosscheckapi

{
  "mcpServers": {
    "crosscheck": {
      "url": "https://crosscheckapi.com/mcp"
    }
  }
}

{
  "mcpServers": {
    "crosscheck": {
      "command": "npx",
      "args": [
        "-y",
        "crosscheckapi"
      ],
      "env": {
        "CROSSCHECK_WALLET_KEY": "your-value",
        "CROSSCHECK_MAX_USD": "your-value",
        "CROSSCHECK_NETWORKS": "your-value"
      }
    }
  }
}

{
  "servers": {
    "crosscheck": {
      "type": "http",
      "url": "https://crosscheckapi.com/mcp"
    }
  }
}

{
  "servers": {
    "crosscheck": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "crosscheckapi"
      ],
      "env": {
        "CROSSCHECK_WALLET_KEY": "your-value",
        "CROSSCHECK_MAX_USD": "your-value",
        "CROSSCHECK_NETWORKS": "your-value"
      }
    }
  }
}

https://crosscheckapi.com/mcp

Your choice stays on this device in a cookie; no account needed.

Values you fill in

• CROSSCHECK_WALLET_KEY secret env
  Private key of a dedicated EVM wallet with a few dollars of USDC on Base (or test USDC on Base Sepolia). Pays for checks.
• CROSSCHECK_MAX_USD env
  Refuse to pay more than this per check. Default 0.10.
• CROSSCHECK_NETWORKS env
  Networks to pay on, in order of preference. Default eip155:8453,eip155:84532. Set eip155:84532 for test USDC only.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Tool names and descriptions exactly as the server reported them on Nov 7, 2026. The maker wrote them, not us; we show them as plain text.

• check

  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 c

• accept

  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 verif

• skillcheck

  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

• sellercheck

  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

• sellerwatch

  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, settlement

• skillcheck_lookup

  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}).

• verify_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,

• 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.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 8, 2026

• ! Caution

  Maker matches the repo

  The publisher (crosscheckapi.com) is not the repo owner (maxugc); someone else may have listed it

• … Not checked yet

  Still maintained

  We have not read this repo from GitHub yet

• … Not checked yet

  Has a licence

  We have not read this repo from GitHub yet

• ✓ Pass

  Endpoint responds

  Responded in 202 ms (HTTP 200)

• – Not applicable

  Sign-in with OAuth

  No sign-in needed

• ✓ Pass

  No hidden instructions in tool descriptions

  Read 8 tool descriptions and found no hidden instructions to the AI

Compared with others in Otheri

• More stars than 0% of the other 18397 servers in this category
• Published to the registry more recently than 75% of the other 18397 servers in this category
• Basic checks equal to or better than 36% of the other 18397 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

README from the maker

{

npx -p crosscheckapi crosscheck quote draft.txt