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Native coins are excluded.","format":"string","name":"PIPRAIL_MAX_TOTAL_DENOM"},{"description":"Lifetime cap on the NUMBER of payments, across every chain + token (e.g. 100).","format":"string","name":"PIPRAIL_MAX_PAYMENTS"},{"description":"Cap on the number of payments within PIPRAIL_WINDOW_SECONDS (a rolling rate limit; set PIPRAIL_WINDOW_SECONDS too).","format":"string","name":"PIPRAIL_MAX_PAYMENTS_PER_WINDOW"},{"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.","format":"string","name":"PIPRAIL_WARN_AT_FRACTION"},{"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.","format":"string","name":"PIPRAIL_SPEND_LOG"},{"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.","format":"string","name":"PIPRAIL_EVENT_LOG"},{"description":"Comma-separated allowed token symbols, plus the alias 'native' for the chain's coin (default: USDC).","format":"string","name":"PIPRAIL_TOKENS"},{"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).","format":"string","name":"PIPRAIL_SCHEMES"}]}]},"_meta":{"io.modelcontextprotocol.registry/official":{"status":"active","statusChangedAt":"2026-06-19T16:12:46.374026Z","publishedAt":"2026-06-19T16:12:46.374026Z","updatedAt":"2026-06-19T16:12:46.374026Z","isLatest":false}}},{"server":{"$schema":"https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json","name":"io.github.piprail/mcp","description":"Budget-bound x402 payment wallet for AI agents — pays HTTP 402 URLs, capped locally. No backend.","title":"PipRail","repository":{"url":"https://github.com/piprail/piprail","source":"github","subfolder":"mcp"},"version":"0.9.0","websiteUrl":"https://piprail.com/mcp","packages":[{"registryType":"npm","identifier":"@piprail/mcp","version":"0.9.0","transport":{"type":"stdio"},"environmentVariables":[{"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.","format":"string","isSecret":true,"name":"PIPRAIL_PRIVATE_KEY"},{"description":"Chain to pay on (default: base).","format":"string","name":"PIPRAIL_CHAIN"},{"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.","format":"string","name":"PIPRAIL_CHAINS"},{"description":"Max spend per single payment, in token units (default: 0.10).","format":"string","name":"PIPRAIL_MAX_AMOUNT"},{"description":"Lifetime spend cap per token, in token units (default: 10.00).","format":"string","name":"PIPRAIL_MAX_TOTAL"},{"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.","format":"string","name":"PIPRAIL_MAX_TOTAL_DENOM"},{"description":"Lifetime cap on the NUMBER of payments, across every chain + token (e.g. 100).","format":"string","name":"PIPRAIL_MAX_PAYMENTS"},{"description":"Cap on the number of payments within PIPRAIL_WINDOW_SECONDS (a rolling rate limit; set PIPRAIL_WINDOW_SECONDS too).","format":"string","name":"PIPRAIL_MAX_PAYMENTS_PER_WINDOW"},{"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.","format":"string","name":"PIPRAIL_WARN_AT_FRACTION"},{"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.","format":"string","name":"PIPRAIL_SPEND_LOG"},{"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.","format":"string","name":"PIPRAIL_EVENT_LOG"},{"description":"Comma-separated allowed token symbols, plus the alias 'native' for the chain's coin (default: USDC).","format":"string","name":"PIPRAIL_TOKENS"},{"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.","format":"string","name":"PIPRAIL_SCHEMES"}]}]},"_meta":{"io.modelcontextprotocol.registry/official":{"status":"active","statusChangedAt":"2026-06-20T14:35:49.266978Z","publishedAt":"2026-06-20T14:35:49.266978Z","updatedAt":"2026-06-20T14:35:49.266978Z","isLatest":true}}}],"metadata":{"count":16}}