How do I install Presign Guard Wallet?

Copy the http config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.

Does Presign Guard Wallet need an API key?

The publisher lists these environment variables: AGENT_KEY, LIMIT_USDC_PER_TX, LIMIT_USDC_PER_DAY, TELEGRAM_BOT_TOKEN, TELEGRAM_CHAT_ID, AC2_OWNER, WALLET_SERVER_URL, WALLET_SERVER_KEY, CHAIN, MAX_PAYMENT_USD, ALLOW_LIST, PRESIGN_CREDIT_KEY, RPC_URL, TEMPO, TEMPO_CHAIN, TEMPO_RPC_URL, MPP_SESSION_DEPOSIT, SOLANA_PRIVATE_KEY, SOLANA_NETWORK, SOLANA_RPC_URL, ALGORAND_MNEMONIC, ALGORAND_NETWORK, XRPL_SEED, XRPL_NETWORK, XRPL_WS_URL.

What transport does Presign Guard Wallet use?

Presign Guard Wallet is reached over HTTP.

When was Presign Guard Wallet last checked?

Last checked 2026-11-09. Agent wallet with limits: pays x402/MPP on Base, Solana, Tempo, XRPL and Algorand; phone approval.

Presign Guard Wallet MCP server

Power your agent

Add this server

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

Add to Cursor Add in Claude Add to VS Code Run on PlugMCP

Host a copy with our keys and logs.

Server URL

https://wallet.fizzl.eu/mcp

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)
AC2_OWNER — Instead of Telegram: your Algorand address; approvals are signed in your own wallet over AC2 (needs the AC2 service, ac2-cli, paired with your wallet)
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

The Claude button above opens Claude with the name and URL filled in. You still confirm it there.

shClaude Code

1claude mcp add --transport http io.github.fizzl13-presign-guard-wallet https://wallet.fizzl.eu/mcp

Run in a terminal.

jsonClaude Desktop

1{2  "mcpServers": {3    "io.github.fizzl13-presign-guard-wallet": {4      "command": "npx",5      "args": [6        "-y",7        "mcp-remote",8        "https://wallet.fizzl.eu/mcp"9      ]10    }11  }12}

claude_desktop_config.json

Remote · HTTPPublisher installStep-by-step: add this in Claude

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

Tools

No tool list yet. Remote servers get one after the first health check.

FAQ

Presign Guard Wallet