PipRail

{
  "_meta": {
    "io.modelcontextprotocol.registry/official": {
      "status": "active",
      "isLatest": true,
      "updatedAt": "2026-09-09T04:55:28.249925Z",
      "publishedAt": "2026-09-09T04:55:28.249925Z",
      "statusChangedAt": "2026-09-09T04:55:28.249925Z"
    }
  },
  "server": {
    "name": "io.github.piprail/mcp",
    "title": "PipRail",
    "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
    "version": "0.10.0",
    "packages": [
      {
        "version": "0.10.0",
        "transport": {
          "type": "stdio"
        },
        "identifier": "@piprail/mcp",
        "registryType": "npm",
        "environmentVariables": [
          {
            "name": "PIPRAIL_PRIVATE_KEY",
            "format": "string",
            "isSecret": true,
            "description": "Your wallet's private key/seed for the chosen chain. Optional: omit it to run read-only (discover/quote/register/budget/guide); set it to let the agent pay. Stays on your machine; the spend policy caps every payment."
          },
          {
            "name": "PIPRAIL_CHAIN",
            "format": "string",
            "description": "Chain to pay on (default: base)."
          },
          {
            "name": "PIPRAIL_CHAINS",
            "format": "string",
            "description": "Pay across several chains (instead of PIPRAIL_CHAIN): a comma-separated list, e.g. base,polygon,solana. Give each its own PIPRAIL_<CHAIN>_KEY (+ optional PIPRAIL_<CHAIN>_RPC_URL). The agent pays whichever chain a 402 asks for — the first listed that can settle — under one shared budget."
          },
          {
            "name": "PIPRAIL_MAX_AMOUNT",
            "format": "string",
            "description": "Max spend per single payment, in token units (default: 0.10)."
          },
          {
            "name": "PIPRAIL_MAX_TOTAL",
            "format": "string",
            "description": "Lifetime spend cap per token, in token units (default: 10.00)."
          },
          {
            "name": "PIPRAIL_MAX_TOTAL_DENOM",
            "format": "string",
            "description": "Cross-token GRAND TOTAL: one spend cap per denomination across every stablecoin and chain, e.g. USD:20.00,EUR:5.00. Not a price oracle — sums tokens of the same unit, each counted 1:1. Native coins are excluded."
          },
          {
            "name": "PIPRAIL_MAX_PAYMENTS",
            "format": "string",
            "description": "Lifetime cap on the NUMBER of payments, across every chain + token (e.g. 100)."
          },
          {
            "name": "PIPRAIL_MAX_PAYMENTS_PER_WINDOW",
            "format": "string",
            "description": "Cap on the number of payments within PIPRAIL_WINDOW_SECONDS (a rolling rate limit; set PIPRAIL_WINDOW_SECONDS too)."
          },
          {
            "name": "PIPRAIL_WARN_AT_FRACTION",
            "format": "string",
            "description": "Emit an early-warning event when spend crosses this fraction of any cap, e.g. 0.8 (80%). Needs PIPRAIL_EVENT_LOG to be visible."
          },
          {
            "name": "PIPRAIL_SPEND_LOG",
            "format": "string",
            "description": "Path to a local append-only spend log. When set, the budget (lifetime, grand total, counts) SURVIVES a restart — hydrated from this file. No backend; you own the file."
          },
          {
            "name": "PIPRAIL_EVENT_LOG",
            "format": "string",
            "description": "Mirror payment events (settled / declined / budget-threshold) as one-line JSON to 'stderr' or a file path — the operator's notification stream. Default: off."
          },
          {
            "name": "PIPRAIL_TOKENS",
            "format": "string",
            "description": "Comma-separated allowed token symbols, plus the alias 'native' for the chain's coin (default: USDC)."
          },
          {
            "name": "PIPRAIL_SCHEMES",
            "format": "string",
            "description": "Comma-separated payment schemes to settle (default: onchain-proof). Add 'exact' (onchain-proof,exact) to also pay standard x402 servers GASLESS on EVM + Solana (method auto-selected). Add 'upto' to also pay metered x402 servers on EVM (Permit2): sign a MAX, the server settles the actual <= max."
          }
        ]
      }
    ],
    "repository": {
      "url": "https://github.com/piprail/piprail",
      "source": "github",
      "subfolder": "mcp"
    },
    "websiteUrl": "https://piprail.com/mcp",
    "description": "Budget-bound x402 payment wallet for AI agents — pays HTTP 402 URLs, capped locally. No backend."
  }
}