P402 Router | X402 Payment Infrastructure

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P402 Router is an AI payment router that optimizes LLM calls across 300+ models. It enables gasless USDC micropayments on Base for autonomous AI agents, ensuring cost efficiency and transparent settlement.

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At a glance

Pricing

Freemium · Paid · Enterprise

Free tier

Yes

API

Yes

Skill level

Technical

About

What is P402 Router | x402 Payment Infrastructure?

P402 Router is an AI payment router and x402 payment infrastructure designed to optimize and settle LLM calls for autonomous AI agents. It intelligently routes requests across over 300 AI models to find the cheapest option that meets specified quality standards. Payments are settled gaslessly in USDC on the Base blockchain via the x402 protocol, providing a full audit trail for every transaction. The platform supports OpenAI-compatible endpoints, allowing seamless integration by simply changing a base URL. Key features include real-time cost tracking, policy enforcement through AP2 mandates, conditional USDC escrow, and an A2A JSON-RPC 2.0 task protocol for orchestration. P402 aims to be the economic layer for the agentic web, offering a robust solution for managing AI agent commerce.

Best used for

Ideal for developers who need to optimize AI model costs, enable agent-to-agent commerce, and ensure transparent, gasless micropayments for their AI applications. Especially valuable for those building autonomous AI agents requiring auditable and policy-enforced transactions on the Base blockchain.

Common actions

optimize AI costs

route LLM calls

settle micropayments

manage AI agents

enforce spending policies

Capabilities

Key features

Intelligent LLM call routing
Gasless USDC micropayments
300+ AI model support
Real-time cost tracking
AP2 mandate policy enforcement
Conditional USDC escrow
OpenAI-compatible endpoint

Target Audience

developer

Integrations

openaiclaudegemini

Pricing & Plans

Freemium · Paid · Enterprise

Not publicly disclosed. Check p402.io for current pricing.

FAQs

What is the difference between the platform fee and the subscription?

The subscription fee (e.g., $499/mo for Pro) unlocks the SaaS control plane, advanced analytics, and priority infrastructure. The platform fee (e.g., 0.75% for Pro) is taken atomically on-chain during each x402 settlement, representing a percentage of the payment.

Can I pay for my P402 subscription with crypto?

Yes, you can pay for your subscription using USDC on Base via a gasless EIP-2612 wallet flow in the Billing dashboard. Traditional Stripe payments are also supported as an alternative option.

Do cache hits count towards the platform fee?

No, semantic cache hits bypass the routing engine and on-chain settlement entirely. This means that any queries served from the cache are free of platform fees, further optimizing your AI spend.

How does P402 ensure gasless USDC payments?

P402 utilizes EIP-3009 transferWithAuthorization for gasless USDC payments. Users sign an authorization once, and a facilitator executes the transfer on their behalf, eliminating gas fees for the user and enabling instant service.

What is the purpose of the P402 Claude Skill?

The P402 Claude Skill provides Claude Code and Claude.ai with deep knowledge of the routing API, billing guard, x402 payment flows, and A2A protocol. This assists with P402 integration and allows Claude to understand the system better.

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