The crosscheck MCP server,
connected in one click.
Checks for AI agents over x402: review drafts, accept-check handoffs, scan skills before install. Connect the official crosscheck MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.
Free to start · No credit card · No hosting needed
Add crosscheck to your AI in one minute
Pick your client. Copy, paste, done — or let gate handle sign-ins and policies for you.
claude mcp add --transport http crosscheck https://crosscheckapi.com/mcpRun in your terminal, then restart Claude Code.
crosscheck · https://crosscheckapi.com/mcp
What your AI can do with crosscheck
Real prompts you can type the moment it's connected — no setup, no docs to read.
“Use “check”: Independent review of a draft (email, report, summary, PR description) before its human sees it. Returns pass or specific issues with fixes;.”
“Use “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,.”
“Use “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.”
“Use “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 {pa.”
How secure is the crosscheck MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how crosscheck holds up.
Security grade A
gate scanned 6 tools on Sep 27, 2026 for prompt injection and risky tool definitions — nothing to flag.
Official endpoint
Operated by crosscheck (crosscheckapi.com) at its documented MCP endpoint — not a third-party mirror or community re-host.
No sign-in needed
This server only exposes public data — no account and no credentials are involved when you connect.
Scanned before it goes live
gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.
Watched for drift
If crosscheck adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.
Connected in three steps
Connect your gate
Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.
Pick crosscheck
Choose crosscheck in the gate directory. No sign-in needed.
Use it anywhere
crosscheck's tools are live in every AI client you've connected — with rules and logging built in.
Free to start · No credit card · No hosting needed
The actual tools crosscheck exposes
Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.
check — Independent review of a draft (email, report, summary, PR description) before its human sees it. Returns pass or specific issues with fixes;
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,
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
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 {pa
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.
Who runs the crosscheck MCP server?
The crosscheck MCP server at a glance
https://crosscheckapi.com/mcpQuestions, answered
Is there an official crosscheck MCP server?
Yes — crosscheck operates its own remote MCP server at crosscheckapi.com. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.
How do I connect crosscheck to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick crosscheck in the directory. No account or sign-in is needed. From then on, crosscheck's tools are available in every client you've connected to gate.
Do I need to host anything?
No. crosscheck runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the crosscheck MCP server safe to connect?
It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.
Is it free?
Yes — you can get started with gate for free and connect crosscheck in minutes. No credit card required.
Connect more than just crosscheck
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up crosscheck in: Claude · Claude Code · ChatGPT · Cursor · VS Code