x402 Preflight is a remote MCP server that gives an AI agent 3 tools, among them audit_x402_endpoint, inspect_x402_endpoint, order_x402_remediation. It answers at https://x402.chikocorp.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 6 of 6 times since 11 September 2026; the last check, on 21 October 2026, succeeded.
Inspect and validate an x402 endpoint before an autonomous agent spends USDC.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
audit_x402_endpoint | Purchase a deep, deterministic audit of payment schema, discovery metadata, redirects, CORS, cache, and operational signals. Returns HTTP 402 until the MCP client supplies a valid payment for this call. Inputs: resource_url, method, expected_network, max_price_usd |
inspect_x402_endpoint | Call before spending on an unfamiliar x402 resource. Free, read-only, and never sends payment credentials. Inputs: resource_url, method, expected_network, max_price_usd |
order_x402_remediation | Purchase a durable remediation intake after a failed audit. Creates an order but never deploys, signs, or spends automatically. Inputs: resource_url, goal, contact, constraints, callback_url, response_format |
Every block below points at https://x402.chikocorp.com/mcp. Pick your client and copy.
claude mcp add --transport http x402-preflight https://x402.chikocorp.com/mcp
{
"mcpServers": {
"x402-preflight": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://x402.chikocorp.com/mcp"]
}
}
}{
"mcpServers": {
"x402-preflight": {
"url": "https://x402.chikocorp.com/mcp"
}
}
}{
"servers": {
"x402-preflight": {
"type": "http",
"url": "https://x402.chikocorp.com/mcp"
}
}
}{
"context_servers": {
"x402-preflight": {
"url": "https://x402.chikocorp.com/mcp"
}
}
}{
"mcpServers": {
"x402-preflight": {
"serverUrl": "https://x402.chikocorp.com/mcp"
}
}
}{
"mcpServers": {
"x402-preflight": {
"url": "https://x402.chikocorp.com/mcp"
}
}
}name: x402 Preflight
version: 0.0.1
schema: v1
mcpServers:
- name: x402 Preflight
type: streamable-http
url: https://x402.chikocorp.com/mcp{
"mcpServers": {
"x402-preflight": {
"httpUrl": "https://x402.chikocorp.com/mcp"
}
}
}{
"mcpServers": {
"x402-preflight": {
"type": "http",
"url": "https://x402.chikocorp.com/mcp"
}
}
}{
"mcpServers": {
"x402-preflight": {
"url": "https://x402.chikocorp.com/mcp"
}
}
}goose://extension?url=https%3A%2F%2Fx402.chikocorp.com%2Fmcp&type=streamable_http&id=x402-preflight&name=x402%20Preflight
It answered our last check on 21 October 2026 in 563 ms. Over 6 checks since 11 September 2026 it answered 6. Status here comes from Neuronto's own probes, not from the publisher.
3, as returned by the server's own tools/list on 13 September 2026: audit_x402_endpoint, inspect_x402_endpoint, order_x402_remediation.
It answered our last check on 21 October 2026 in 563 ms. Over 6 checks since 11 September 2026 it answered 6.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://x402.chikocorp.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: io.github.chico10117. Endpoint host: x402.chikocorp.com. ARD identifier: urn:air:io.github.chico10117:mcp:x402-preflight.
First indexed 10 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.