PayStage runs on your own machine — the client starts it, so there is no endpoint to ping. Last commit 2 Nov 2026.
Umbrella MCP: payment preflight, auth watch, HIP-3 trade preflight, velocity checks
Today is the operative word: we check PayStage every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
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 mcp add mcp -- npx -y @paystage/mcp
{
"mcpServers": {
"mcp": {
"command": "npx",
"args": [
"-y",
"@paystage/mcp"
]
}
}
}
[mcp_servers.mcp]
command = "npx"
args = ["-y", "@paystage/mcp"]
{
"mcpServers": {
"mcp": {
"command": "npx",
"args": [
"-y",
"@paystage/mcp"
]
}
}
}
{
"servers": {
"mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@paystage/mcp"
]
}
}
}
Optional settings from the registry entry, left out of the block above:
PAYSTAGE_POLICY_PATH (Path to policy.json spending rules), PAYSTAGE_RPC_URL (Base RPC URL override).
MCP tool: evaluate HIP-3/trade.xyz orders against a local TradePolicy before trading
Surface contracts: API behavior evidence, x402 pre-payment check, MCP server preflight
Evidence-backed UBL, PDF, and image invoice checks before approval or payment.
Preflight checks for agent repository contributions, bounty work, and Base payments.
Pay-per-call x402 API for AI trading agents: pre-trade security checks, Polymarket & HIP-4 odds.
22 pay-per-call x402 tools for agents: scam checks, payment pre-flight, approvals, data. USDC/Base
Draft ERC-8478 payee verification, x402 Lint, receipts and stablecoin payment checks.
MCP server for no-payment x402 surface triage, 402 Index health checks, and paid review handoff.
Answers built from our own checks of this server.