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x402 Preflight

Official registry AI and agents

Inspect and validate an x402 endpoint before an autonomous agent spends USDC.

Source code

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http x402-preflight 'https://x402.chikocorp.com/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "x402-preflight": {
            "type": "http",
            "url": "https://x402.chikocorp.com/mcp"
        }
    }
}

Frequently asked questions

What is x402 Preflight?

Inspect and validate an x402 endpoint before an autonomous agent spends USDC.

How do I install x402 Preflight?

It runs as a remote server. In Claude Code: claude mcp add --transport http x402-preflight 'https://x402.chikocorp.com/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does x402 Preflight need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is x402 Preflight open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains x402 Preflight?

It is published by chico10117. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.