MCP serverOfficial registry

Presign Guard Wallet

Agent wallet with limits: pays x402/MPP on Base, Solana, Tempo, XRPL and Algorand; phone approval.

by io.github.Fizzl13v0.17.0GitHub npm Website

Power your agent

Add this server

The publisher's own command. Not a PlugMCP endpoint.

Local command

npx -y [email protected]

Credentials from the publisher

AGENT_KEY — Private key of the agent's own wallet (a separate wallet holding only what the agent may spend)
LIMIT_USDC_PER_TX — Most USDC per payment or transfer without asking you, e.g. 5
LIMIT_USDC_PER_DAY — Daily USDC budget, e.g. 20
TELEGRAM_BOT_TOKEN — Telegram bot that asks you to approve anything over a limit
TELEGRAM_CHAT_ID — Your Telegram chat id (approvals go only there)
WALLET_SERVER_URL — Instead of LIMIT_* and TELEGRAM_*: a wallet server keeping one budget for all your agents
WALLET_SERVER_KEY — The agent key (awk_…) from the wallet server's dashboard
CHAIN — base (default), ethereum, optimism, arbitrum, polygon or bsc
MAX_PAYMENT_USD — Most a single x402 API call may cost, in dollars (default 1)
ALLOW_LIST — Optional: only pay or sign for these addresses (0x, XRPL r… or Algorand, comma-separated); anything else needs approval. Not with a wallet server
PRESIGN_CREDIT_KEY — Optional presign-guard credit key (pgc_…) to pay the $0.01 checks from prepaid credits
RPC_URL — Optional RPC URL for the chain
TEMPO — off to never pay MPP charges on Tempo (default on: paid in USDC.e on Tempo from the same address)
TEMPO_CHAIN — 4217 (Tempo, default) or 42431 (Moderato testnet)
TEMPO_RPC_URL — Optional Tempo RPC URL
MPP_SESSION_DEPOSIT — Optional: pay MPP sessions on Tempo; the USDC.e each channel deposit or top-up puts in (counted toward the USDC limits); then each call is a signed voucher
SOLANA_PRIVATE_KEY — Optional: the agent's own Solana secret key (base58 or solana-keygen byte array); pays x402 offers in USDC on Solana (checked by presign-guard, counted toward the USDC limits)
SOLANA_NETWORK — mainnet (default) or devnet
SOLANA_RPC_URL — Optional Solana RPC URL
ALGORAND_MNEMONIC — Optional: the agent's own Algorand account (25 words); pays x402 offers in USDC on Algorand (counted toward the USDC limits)
ALGORAND_NETWORK — mainnet (default) or testnet
XRPL_SEED — Optional: the agent's own XRPL account seed; pays x402 offers in RLUSD on the XRP Ledger (counted toward the USDC limits)
XRPL_NETWORK — mainnet (default) or testnet
XRPL_WS_URL — Optional XRPL node websocket URL

Provider

Claude Code

AGENT_KEY=<secret> LIMIT_USDC_PER_TX=<value> LIMIT_USDC_PER_DAY=<value> TELEGRAM_BOT_TOKEN=<secret> TELEGRAM_CHAT_ID=<value> WALLET_SERVER_URL=<value> WALLET_SERVER_KEY=<secret> CHAIN=<value> MAX_PAYMENT_USD=<value> ALLOW_LIST=<value> PRESIGN_CREDIT_KEY=<secret> RPC_URL=<value> TEMPO=<value> TEMPO_CHAIN=<value> TEMPO_RPC_URL=<value> MPP_SESSION_DEPOSIT=<value> SOLANA_PRIVATE_KEY=<secret> SOLANA_NETWORK=<value> SOLANA_RPC_URL=<value> ALGORAND_MNEMONIC=<secret> ALGORAND_NETWORK=<value> XRPL_SEED=<secret> XRPL_NETWORK=<value> XRPL_WS_URL=<value> claude mcp add io.github.fizzl13-presign-guard-wallet -- npx -y [email protected]

Run in a terminal.

Claude Desktop

{
  "mcpServers": {
    "io.github.fizzl13-presign-guard-wallet": {
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ],
      "env": {
        "AGENT_KEY": "<secret>",
        "LIMIT_USDC_PER_TX": "<value>",
        "LIMIT_USDC_PER_DAY": "<value>",
        "TELEGRAM_BOT_TOKEN": "<secret>",
        "TELEGRAM_CHAT_ID": "<value>",
        "WALLET_SERVER_URL": "<value>",
        "WALLET_SERVER_KEY": "<secret>",
        "CHAIN": "<value>",
        "MAX_PAYMENT_USD": "<value>",
        "ALLOW_LIST": "<value>",
        "PRESIGN_CREDIT_KEY": "<secret>",
        "RPC_URL": "<value>",
        "TEMPO": "<value>",
        "TEMPO_CHAIN": "<value>",
        "TEMPO_RPC_URL": "<value>",
        "MPP_SESSION_DEPOSIT": "<value>",
        "SOLANA_PRIVATE_KEY": "<secret>",
        "SOLANA_NETWORK": "<value>",
        "SOLANA_RPC_URL": "<value>",
        "ALGORAND_MNEMONIC": "<secret>",
        "ALGORAND_NETWORK": "<value>",
        "XRPL_SEED": "<secret>",
        "XRPL_NETWORK": "<value>",
        "XRPL_WS_URL": "<value>"
      }
    }
  }
}

claude_desktop_config.json

Step-by-step: add this in Claude

Remote URL or a command on your machine? How the two installs differ

Run on PlugMCP

Host a copy with our keys and logs.

A new server you create. It is not this listing's official endpoint. Use the publisher install when you want their URL and their credentials.

Launch

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Host a copy with our keys and logs.

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