crosscheck is an MCP server with 8 tools an agent can call, among them accept, check, result. It answers at https://crosscheckapi.com/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 3 of 4 times since 24 September 2026; the last check, on 7 November 2026, succeeded.
Independent second opinion on an agent's draft before its human sees it. Paid per check over x402.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
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 check Inputs: task, deliverable, reference, payment_tx, payment_network, ref |
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 ans Inputs: draft, request, sources, source_urls, fetch_cited, open_review |
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. Inputs: job_id, result_token |
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 re Inputs: resource, method, network |
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 in Inputs: resource, method, network, notify |
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 US Inputs: files, fresh, ref |
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}). Inputs: bundle_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 Inputs: receipt_hash, receipt, draft, request, sources, task |
Every block below points at https://crosscheckapi.com/mcp. Pick your client and copy.
claude mcp add --transport http crosscheck https://crosscheckapi.com/mcp
{
"mcpServers": {
"crosscheck": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://crosscheckapi.com/mcp"]
}
}
}{
"mcpServers": {
"crosscheck": {
"url": "https://crosscheckapi.com/mcp"
}
}
}{
"servers": {
"crosscheck": {
"type": "http",
"url": "https://crosscheckapi.com/mcp"
}
}
}{
"context_servers": {
"crosscheck": {
"url": "https://crosscheckapi.com/mcp"
}
}
}{
"mcpServers": {
"crosscheck": {
"serverUrl": "https://crosscheckapi.com/mcp"
}
}
}{
"mcpServers": {
"crosscheck": {
"url": "https://crosscheckapi.com/mcp"
}
}
}name: crosscheck
version: 0.0.1
schema: v1
mcpServers:
- name: crosscheck
type: streamable-http
url: https://crosscheckapi.com/mcp{
"mcpServers": {
"crosscheck": {
"httpUrl": "https://crosscheckapi.com/mcp"
}
}
}{
"mcpServers": {
"crosscheck": {
"type": "http",
"url": "https://crosscheckapi.com/mcp"
}
}
}{
"mcpServers": {
"crosscheck": {
"url": "https://crosscheckapi.com/mcp"
}
}
}goose://extension?url=https%3A%2F%2Fcrosscheckapi.com%2Fmcp&type=streamable_http&id=crosscheck&name=crosscheck
It answered our last check on 7 November 2026 in 989 ms. Over 4 checks since 24 September 2026 it answered 3. Status here comes from Neuronto's own probes, not from the publisher.
Yes. It is published by crosscheckapi.com and served from crosscheckapi.com, the vendor's own domain: https://crosscheckapi.com/mcp.
8, as returned by the server's own tools/list on 14 November 2026: accept, check, result, sellercheck, sellerwatch, skillcheck, skillcheck_lookup, verify_receipt.
It answered our last check on 7 November 2026 in 989 ms. Over 4 checks since 24 September 2026 it answered 3.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://crosscheckapi.com/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: com.crosscheckapi. Endpoint host: crosscheckapi.com. ARD identifier: urn:air:com.crosscheckapi:mcp:crosscheck.
First indexed 24 September 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.