toolspool

P402.io

What it does

P402 Router is a sophisticated routing control plane designed to operationalize and scale x402 (HTTP 402 Payment Required) payments for paid endpoints and agent stacks. It addresses fragmentation and instability in the x402 ecosystem by sitting between paid endpoints and payment facilitators. The Router evaluates requests, selects optimal acceptance options, routes verification and settlement, and enforces critical policies like spend controls and rate limits. It facilitates trustless micropayment settlement using USDC and USDT on the Base blockchain with a low 1% flat fee, making it ideal for high-volume pay-per-call APIs and agent-to-agent transactions.

Core features

  • ✦Smart Routing: Selects the best facilitator based on health, cost, and policy, with failover capability.
  • ✦Spend Controls: Enforces per-buyer budgets, rate limits (RPM), route caps, and denial rules.
  • ✦x402 Payment Settlement: Route, verify, and settle USDC/USDT payments on the Base blockchain with a 1% flat fee.
  • ✦Observability & Tracing: Provides a DecisionTrace timeline for every payment attempt, tracking conversion and failure causes.
  • ✦Bazaar Overlays: Exposes machine-readable metadata tied to runtime health for endpoint discovery.

Use cases

  • →Monetizing Pay-per-call APIs by metering every request without relying on subscriptions.
  • →Implementing MCP (Multi-Chain Protocol) servers to charge per tool invocation.
  • →Enabling agent-to-agent commerce where policies gate spend and domains.
  • →Creating Self-Healing Data Pipelines where agents automatically pay for premium access upon hitting rate limits (429).
  • →Internal chargeback systems for paid edges between services across internal teams.