PayStage Preflight MCP Server

by paystage Your server? Claim it

local only

PayStage Preflight runs on your own machine — the client starts it, so there is no endpoint to ping. Last commit 2 Nov 2026.

Evaluate x402 PaymentRequired against a local spending policy before an agent pays

—

Installs / week

npm · @paystage/preflight

Stars

0 open issues

2 Nov 2026

Last commit

3 releases in 90 days

MIT

License

TypeScript

Nothing serious here today

Today is the operative word: we check PayStage Preflight every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add preflight -- npx -y @paystage/preflight

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "preflight": {
      "command": "npx",
      "args": [
        "-y",
        "@paystage/preflight"
      ]
    }
  }
}

~/.codex/config.toml

[mcp_servers.preflight]
command = "npx"
args = ["-y", "@paystage/preflight"]

.cursor/mcp.json

{
  "mcpServers": {
    "preflight": {
      "command": "npx",
      "args": [
        "-y",
        "@paystage/preflight"
      ]
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "preflight": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@paystage/preflight"
      ]
    }
  }
}

Optional settings from the registry entry, left out of the block above: PAYSTAGE_POLICY_PATH (Path to policy.json spending rules).

Alternatives to PayStage Preflight

same job, measured the same way

PayStage Trade Preflight

by paystage

MCP tool: evaluate HIP-3/trade.xyz orders against a local TradePolicy before trading

local only

Presidio Hardened X402 MCP

by presidio-v

Pre-payment safety gate for x402 agents: PII screening, spend policy, replay checks before signing.

180 installs/wk local only

x402Shield

by x402shield

Public demo: evaluate AI-agent payment authorization and approval policy. No signing, no settlement.

5 tools answering

Pulsefeed X402

by nikolife2016

Verify x402 payment endpoints before an AI agent pays: scam scan, on-chain checks, trust scores.

103 installs/wk 11 tools answering

Attest

by attestagents

Scan agent payment endpoints (x402, AP2, L402, MPP, 402) for a trust grade A-F before paying.

37 installs/wk 2 tools answering

Invoice Preflight

by ahmet11159

Evidence-backed UBL, PDF, and image invoice checks before approval or payment.

4 tools answering

JSON Schema Validator

by ryuamarines

Validates JSON against a JSON Schema, lists violations. x402 payment required (Base mainnet USDC).

1 tools answering

AccessGraph

by chatgpt-snugguppy5-accessgraph

Policy-aware web access preflight: robots, licensing, payment and advertised routes for agents.

1 tools answering

PayStage Preflight — questions

Answers built from our own checks of this server.

Why is there no uptime for PayStage Preflight?

PayStage Preflight runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package @paystage/preflight.

How do I connect PayStage Preflight?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It runs locally, so the command pulls @paystage/preflight straight from npm; nothing to host, nothing to sign up for.

Is PayStage Preflight open source?

Yes — it is published under the MIT licence, written in TypeScript and 3 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.