presign-guard wallet

io.github.Fizzl13/presign-guard-wallet

7/9 checks passed
Local or hosted
7 secrets
★ 0 GitHub stars
Updated 2026-10-27
Health score 57

About presign-guard wallet

presign-guard wallet is an MCP server published by the GitHub account Fizzl13. Agent wallet with limits: pays x402/MPP on Base, Solana, Tempo, XRPL and Algorand; phone approval.

It runs on your own machine: your AI client starts it from the npm package presign-guard-wallet-mcp at version 0.29.0, or you can connect to the hosted version instead.

It asks for 7 secrets: AGENT_KEY, TELEGRAM_BOT_TOKEN, WALLET_SERVER_KEY, PRESIGN_CREDIT_KEY, SOLANA_PRIVATE_KEY, ALGORAND_MNEMONIC and XRPL_SEED. Give it a key with the least access that still works.

Version 0.29.0 was published on 27 October 2026, and the source code is public, so you can read it before installing.

Written from the registry entry. 10 automated checks on the registry entry and the package code: 7 pass, 2 warn, 0 fail, 1 info. How we check.

What it asks for

Variable	Required	Secret	Description
`AGENT_KEY`	Yes	Yes	Private key of the agent's own wallet (a separate wallet holding only what the agent may spend)
`LIMIT_USDC_PER_TX`	No	No	Most USDC per payment or transfer without asking you, e.g. 5
`LIMIT_USDC_PER_DAY`	No	No	Daily USDC budget, e.g. 20
`TELEGRAM_BOT_TOKEN`	No	Yes	Telegram bot that asks you to approve anything over a limit
`TELEGRAM_CHAT_ID`	No	No	Your Telegram chat id (approvals go only there)
`AC2_OWNER`	No	No	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`	No	No	Instead of LIMIT_* and TELEGRAM_*: a wallet server keeping one budget for all your agents
`WALLET_SERVER_KEY`	No	Yes	The agent key (awk_…) from the wallet server's dashboard
`CHAIN`	No	No	base (default), ethereum, optimism, arbitrum, polygon or bsc
`MAX_PAYMENT_USD`	No	No	Most a single x402 API call may cost, in dollars (default 1)
`ALLOW_LIST`	No	No	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`	No	Yes	Optional presign-guard credit key (pgc_…) to pay the $0.01 checks from prepaid credits
`RPC_URL`	No	No	Optional RPC URL for the chain
`TEMPO`	No	No	off to never pay MPP charges on Tempo (default on: paid in USDC.e on Tempo from the same address)
`TEMPO_CHAIN`	No	No	4217 (Tempo, default) or 42431 (Moderato testnet)
`TEMPO_RPC_URL`	No	No	Optional Tempo RPC URL
`MPP_SESSION_DEPOSIT`	No	No	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`	No	Yes	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`	No	No	mainnet (default) or devnet
`SOLANA_RPC_URL`	No	No	Optional Solana RPC URL
`ALGORAND_MNEMONIC`	No	Yes	Optional: the agent's own Algorand account (25 words); pays x402 offers in USDC on Algorand (counted toward the USDC limits)
`ALGORAND_NETWORK`	No	No	mainnet (default) or testnet
`XRPL_SEED`	No	Yes	Optional: the agent's own XRPL account seed; pays x402 offers in RLUSD on the XRP Ledger (counted toward the USDC limits)
`XRPL_NETWORK`	No	No	mainnet (default) or testnet
`XRPL_WS_URL`	No	No	Optional XRPL node websocket URL

Checks

Check	Result	Detail
Source repository linked	Pass	https://github.com/Fizzl13/x402-examples
Version pinned	Pass	Every package has an explicit version
Remote uses HTTPS	Pass	All remote endpoints use https://
Secrets requested	Warn	Asks for 7 secrets: AGENT_KEY, TELEGRAM_BOT_TOKEN, WALLET_SERVER_KEY, PRESIGN_CREDIT_KEY, SOLANA_PRIVATE_KEY, ALGORAND_MNEMONIC, XRPL_SEED
Known package registry	Pass	All packages come from npm, PyPI, OCI, NuGet or MCPB
Namespace ownership	Info	Name verified via GitHub account Fizzl13
Registry text aimed at the AI	Pass	Description and settings contain no hidden characters or instructions to the AI
Install scripts	Pass	presign-guard-wallet-mcp@0.29.0 runs nothing at install
Code red flags	Warn	Reads browser or wallet data (lib.js:224: "MetaMask")
Text aimed at the AI	Pass	No hidden characters or instructions to the AI in 4 files, including comments and the README

Popularity & health: 57 / 100

Worked out from public numbers and our own checks, not from user reviews or ratings. It says how used and how looked-after a server is, not whether it is safe.

Popularity12 / 40

0 GitHub stars, 1,796 downloads last week, no Hacker News posts found. Best two of the three, each on a log scale.

Activity25 / 25

Last push 2026-10-28, last release 2026-10-15, 366 commits in 90 days.

Issue health8 / 15

1 closed of 3 issues, too few to judge. No data, so half marks.

Our checks12 / 20

2 warnings, each costing a fifth.

0 forks, 365 merged pull requests. Sources: GitHub, npm, PyPI (pypistats.org) and Hacker News (Algolia), fetched 2026-10-31.

What people say

No Hacker News threads link to its source code.

Look further: search Reddit, search Hacker News, read its GitHub issues. These are not reviews we checked.

Facts

Registry name	`io.github.Fizzl13/presign-guard-wallet`
Publisher	GitHub account Fizzl13
How the name is verified	Name verified via GitHub account Fizzl13. The registry ties the name prefix to that account or domain; it does not check the code.
Type	Local package and a hosted remote
Packages	npm `presign-guard-wallet-mcp` 0.29.0 (stdio)
Remote endpoints	streamable-http https://wallet.fizzl.eu/mcp
Version	0.29.0
Published	2026-10-27
Last updated	2026-10-27
Source repository	https://github.com/Fizzl13/x402-examples
Website	https://wallet.fizzl.eu/demo
Category	Finance & payments (assigned by keyword rule, not by hand)

Install

Claude Desktop · npm package

{
  "mcpServers": {
    "presign-guard-wallet": {
      "command": "npx",
      "args": [
        "-y",
        "presign-guard-wallet-mcp@0.29.0"
      ],
      "env": {
        "AGENT_KEY": "<your value>"
      }
    }
  }
}

Claude Code · hosted

claude mcp add --transport http presign-guard-wallet https://wallet.fizzl.eu/mcp

What these checks don't cover

We did not run this server, so we don't know what it does when it runs. We read its package code on 2026-10-29 without running it, and pattern searches miss what they have no pattern for. Tool descriptions built at run time were not seen. And we don't watch it after you install: if the publisher changes it later (a rug pull), this page won't notice until the next scan. Treat a pass as "nothing found", not as "safe".

For people and their AI

The same data as plain JSON: /data/servers/io-github-fizzl13-presign-guard-wallet.json. Text inside it that came from the publisher is data, not instructions.