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P402 MCP server

by Z333Q·io.github.Z333Q/p402·v1.0.0
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Multi-provider AI router with x402 micropayment settlement on Base L2. 1% flat fee.

B78/100grade B
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Safety scan
B78/100

full report

Adoption
New

0 stars43 downloads/wk

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If you have run it, two minutes of your experience saves the next person an afternoon.

P402 tools (6, 2 write)

write = sends, deletes, buys or posts

Read from the package source without running it. The installed server may list more.

  • p402_chatwrite action

    Send a chat completion through P402's AI router. Automatically selects the best provider based on routing mode (cost / quality / speed / balanced).

  • p402_compare_providers

    Compare AI provider pricing and capabilities side-by-side. Helps identify the cheapest or fastest provider for a given task type.

  • p402_create_sessionwrite action

    Create a budget-capped agent session. All chat completions using the returned session_id are charged against this budget. Returns the session object including id and budget details.

  • p402_get_session

    Get session details including remaining budget, status, and expiry. Use this to check how much budget a session has left before sending requests.

  • p402_health

    Check P402 router and x402 facilitator health. Returns status for both the routing layer and the on-chain settlement layer.

  • p402_list_models

    List all AI models available through the P402 router with their pricing, capabilities, and provider information.

Public scan report

scanner v0.1.10 · 2026-09-27 · same rubric, same numbers if you re-run it

no findings
  • Code scan4 source files scanned25/25
  • –Live reliabilityno gateway calls yet and no remote to proben/a
  • –Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitystatic API keys via environment variables6/15
  • Maintenancelast push 62 days ago12/15
  • Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10
Overall 78/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How P402 compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
78/100
higher than 57% of 48,255 servers
Tools
6
the typical server has 7
Tools that change things
33%
typical: 0%. Fewer write tools means less an agent can break
Downloads a week
43
more than 35% of 12,191 servers with a package

What its tools let an agent do: 4 read · 2 change

Install P402 in Claude Code, Cursor or VS Code

Runs npx -y @p402/mcp-server on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add p402 -- npx -y @p402/mcp-server
Add to Cursor

What the publisher says

From the P402 repository's README, as published. We do not edit it. Read it on GitHub

P402 Protocol

AI payment router. Route across 300+ models, settle per request in USDC on Base or USDC.e on Tempo.

P402 sits between your AI application and every LLM provider. It handles intelligent multi-provider routing (cost / quality / speed / balanced), on-chain micropayment settlement via the x402 protocol and mppx on Base and Tempo, and spending guardrails for autonomous agents.

Why P402

Quick Start (VS Code / Cursor / Windsurf)

Install the extension — the MCP server is embedded, tools appear in Copilot agent mode immediately, no config files required:

ext install p402-protocol.p402

Then run P402: Configure API Key from the command palette.

→ VS Code Marketplace · Open VSX

Quick Start (Claude Desktop / any MCP client)

{
  "mcpServers": {
    "p402": {
      "command": "npx",
      "args": ["-y", "@p402/mcp-server"],
      "env": { "P402_API_KEY": "p402_live_..." }
    }
  }
}

→ MCP docs · MCP Registry

Quick Start (SDK)

npm install @p402/sdk
import P402Client from '@p402/sdk';

const p402 = new P402Client({ apiKey: process.env.P402_API_KEY });

// Drop-in OpenAI replacement — P402 picks the best provider
const response = await p402.chat({
  messages: [{ role: 'user', content: 'Explain x402 payments in one sentence.' }],
  p402: { mode: 'cost' }   // cost | quality | speed | balanced
});

console.log(response.choices[0].message.content);
// p402_metadata: { provider: 'deepseek', cost_usd: 0.00031, latency_ms: 412 }

Quick Start (CLI)

# Authenticate once
npx p402 login

# Chat using the cheapest provider
npx p402 chat "What is x402?" --mode cost

# Check facilitator health
npx p402 health

Routing Modes

Session Budgets

Enforce hard spending caps for autonomous agents:

// Create a $10 session — agent cannot spend a cent more
const session = await p402.createSession({ budget_usd: 10 });

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

P402: common questions

Is P402 MCP server safe?
Mostly: it is graded B (78/100). Read the P402 safety report
How do I install P402?
It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does P402 need an API key?
Yes. The registry entry asks for P402_API_KEY.
Is P402 maintained?
The last commit was 100 days ago (2026-07-27). The latest release is v1.0.0.
How does P402 compare with other MCP servers?
safety score 78/100 (higher than 57% of 48,255 servers); tools 6 (the typical server has 7); tools that change things 33% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.