crosscheck MCP Server
by maxugccom.crosscheckapi/crosscheckv0.5.5
Checks for AI agents over x402: review drafts, accept-check handoffs, scan skills before install.
context tax
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security
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cold start
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freshness
Active12d ago
Install crosscheck MCP server
Install in Claude Code
claude mcp add client-maxugc -e CROSSCHECK_WALLET_KEY='<crosscheck-wallet-key>' -- npx -y crosscheckapiInstall in Cursor
{
"mcpServers": {
"client-maxugc": {
"command": "npx",
"args": [
"-y",
"crosscheckapi"
],
"env": {
"CROSSCHECK_WALLET_KEY": "<crosscheck-wallet-key>"
}
}
}
}Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).
Install in Claude Desktop
{
"mcpServers": {
"client-maxugc": {
"command": "npx",
"args": [
"-y",
"crosscheckapi"
],
"env": {
"CROSSCHECK_WALLET_KEY": "<crosscheck-wallet-key>"
}
}
}
}Settings → Developer → Edit Config (claude_desktop_config.json), then restart.
Install in VS Code
{
"servers": {
"client-maxugc": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"crosscheckapi"
],
"env": {
"CROSSCHECK_WALLET_KEY": "<crosscheck-wallet-key>"
}
}
}
}Add to .vscode/mcp.json in your workspace.
Install in Windsurf
{
"mcpServers": {
"client-maxugc": {
"command": "npx",
"args": [
"-y",
"crosscheckapi"
],
"env": {
"CROSSCHECK_WALLET_KEY": "<crosscheck-wallet-key>"
}
}
}
}Add to ~/.codeium/windsurf/mcp_config.json.
Configuration
| Variable | Required | Secret | Description |
|---|---|---|---|
| CROSSCHECK_WALLET_KEY | — | yes | 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 | — | — | Refuse to pay more than this per check. Default 0.10. |
| CROSSCHECK_NETWORKS | — | — | Networks to pay on, in order of preference. Default eip155:8453,eip155:84532. Set eip155:84532 for test USDC only. |
Remote endpoints
- streamable-http
https://crosscheckapi.com/mcp
Freshness
Active — last maintenance signal 12d ago. The newest of the signals below sets the band.
Last commit (default branch)
2026-09-27 · 12d ago · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-09-28 · 12d ago · official registry · v0.5.5
FAQ
›How do I install the crosscheck MCP server in Claude Code?
Run: claude mcp add client-maxugc -e CROSSCHECK_WALLET_KEY='<crosscheck-wallet-key>' -- npx -y crosscheckapi. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.
›Does crosscheck require an API key?
Yes. It expects CROSSCHECK_WALLET_KEY, of which 1 is a secret.
›Can I use crosscheck as a remote (hosted) MCP server?
Yes — it offers both a hosted endpoint and a local stdio package.
›Is crosscheck in the official MCP registry?
Yes, as com.crosscheckapi/crosscheck.