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Preflight Checks (x402)

Preflight Checks (x402)

Local
preflight402.comAI & Agents
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About Preflight Checks (x402)

Deterministic pre-execution verification tools for AI agents with x402 USDC pay-per-call on Base

Configuration

Local server config is the same for every client. Copy it into your client’s MCP config file.

mcp.json · Universal config
{
  "mcpServers": {
    "josediegorobles-preflight-checks": {
      "command": "npx",
      "args": [
        "-y",
        "@joserobles/preflight-mcp"
      ],
      "env": {
        "PREFLIGHT_BUYER_PRIVATE_KEY": "<PREFLIGHT_BUYER_PRIVATE_KEY>",
        "PREFLIGHT_BASE_URL": "<PREFLIGHT_BASE_URL>"
      }
    }
  }
}
Run commandnpx -y @joserobles/preflight-mcp
Environment variables to set
PREFLIGHT_BUYER_PRIVATE_KEYSecretPrivate key of a Base wallet holding USDC, used to pay each call via x402 (0.05 USDC per check).
PREFLIGHT_BASE_URLAPI base URL. Defaults to https://preflight402.com.

Local servers need a runtime on your machine (e.g. Node.js 18+). Config file locations differ by client; see your client’s docs.

Packages
npm@joserobles/preflight-mcp0.4.0

Tools

8

Saved tool list · updated 2w ago

ParameterTypeRequiredDescription
packagesarrayYes
ecosystemenumYesnpm | pypi | crates

Details

The maintainer has not added details yet. Check the README in the repository.

Comments

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New to MCP?

From what the protocol is to installing your first server, these answers cover most first questions.

An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.