Security scan of an AI agent skill or MCP server before install: a malware and prompt injection audit of its files (read, never run). Finds downloads piped to a shell, credential and wallet theft, secrets sent over the network, persistence, hidden Unicode, and instructions aimed at the agent or the scanner. Supply-chain check with a signed receipt keyed to the file hashes; bundles already scanned are free to look up. $0.03.
# 1. Ask the endpoint what it costs (no payment, no wallet needed): curl -i -X POST 'https://crosscheckapi.com/v1/skillcheck' # -> HTTP/1.1 402 Payment Required # the response carries the price, asset and pay-to address. # 2. Pay and retry with any x402 client: npx x402-fetch -X POST 'https://crosscheckapi.com/v1/skillcheck'
Endpoint: https://crosscheckapi.com/v1/skillcheck. Operated by crosscheckapi.com, not by Animica. Price and availability were correct at the last probe on 2026-10-01 and are set by the operator, who may change them.
Verify output and validate work another AI agent hands back, before you pay, release escrow, or pass it on. An acceptance test and quality check: send the task …
Verify output another AI agent hands back, by code alone, for $0.005: no model call, answers in about a second. Recomputes the deliverable's written sums, total…
Fact-check and review an AI agent's draft before a human sees it: a hallucination check and second opinion on any email, report, summary, or PR description. Ret…