402sentinel Mcp
Score x402 payment counterparties on Base before your agent sends USDC so you get allow, review, or block guidance.
Overview
402 Sentinel MCP is a Ship-phase MCP server that assesses x402 counterparty risk on Base and returns allow, review, or block guidance before you pay.
What is this MCP server?
- Returns allow / review / block style guidance for x402 counterparties before you pay
- On-chain risk scoring oriented to Base network usage
- Pay-per-call pricing from about $0.002 via Circle Gateway USDC balance
- Requires CLIENT_PRIVATE_KEY for the paying Base wallet
- Optional SENTINEL_URL override (default https://402sentinel.com); npm @kaditang/402sentinel-mcp v0.6.0
- Package version 0.6.0 as @kaditang/402sentinel-mcp
- Per-call pricing from $0.002 using client wallet on Base
- Default service URL https://402sentinel.com
Community signal: 1 GitHub stars.
What problem does it solve?
Agents that auto-pay x402 endpoints can send USDC to risky or unknown counterparties with no quick on-chain risk signal.
Who is it for?
Builders shipping agentic APIs or clients that use x402 on Base and want automated pre-payment risk gates.
Skip if: Projects with no x402 payments, teams unwilling to fund a Base wallet for per-call sentinel fees, or those needing full KYC/compliance platforms.
What do I get? / Deliverables
You get a scored risk decision in the agent loop so you can allow payment, pause for review, or block before funds move.
- MCP tools that query 402 Sentinel for counterparty risk outcomes
- Configurable service base URL for sentinel API
- Documented npm v0.6.0 stdio package for agent hosts
Recommended MCP Servers
Journey fit
How it compares
On-chain x402 risk MCP gate, not a general smart-contract audit skill or payment processor UI.
Common Questions / FAQ
Who is 402 Sentinel MCP for?
Developers building agents or services that pay or accept x402 on Base and want counterparty risk checks before each payment decision.
When should I use 402 Sentinel MCP?
Use it in Ship security workflows whenever your agent is about to pay an x402 counterparty and you need allow, review, or block guidance first.
How do I add 402 Sentinel MCP to my agent?
Install @kaditang/402sentinel-mcp, configure stdio MCP in your agent, set CLIENT_PRIVATE_KEY for a Base wallet with USDC on Circle Gateway, and optionally SENTINEL_URL.