PlainText Wallet Approval Checker

Name: PlainText Wallet Approval Checker
Author: Fizzl13

by Fizzl13version 1.1.2i★ –iRuns in the cloud

Registry nameio.github.Fizzl13/plaintext-wallet-checker

Install

Overview

Description from the maker (original English)

Explains wallet approvals and signature requests in plain language: SAFE, CAUTION or RISK.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs in the cloud
Transport: Streamable HTTP
Category: Other

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
The registry lists no key to fill in.

You need

Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

Open Settings → Connectors
Press Add custom connector
Paste the address below and press Add
If it asks you to sign in, sign in with the maker

https://plaintext.fizzl.eu/mcp

Run this in your terminal

claude mcp add --transport http plaintext-wallet-checker https://plaintext.fizzl.eu/mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "plaintext-wallet-checker": {
      "url": "https://plaintext.fizzl.eu/mcp"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "plaintext-wallet-checker": {
      "type": "http",
      "url": "https://plaintext.fizzl.eu/mcp"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

ChatGPT connects only to servers on the internet:

Open ChatGPT on the web → Settings → Connectors (Apps)
Press Create or Add (some plans need Developer mode under Advanced first)
Paste the address below, give it a name and save
If it asks you to sign in, sign in with the maker

https://plaintext.fizzl.eu/mcp

Menu names can differ slightly by plan and over time.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account Fizzl13, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
… Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Otheri

More stars than 0% of the other 18353 servers in this category
Published to the registry more recently than 59% of the other 18353 servers in this category
Basic checks equal to or better than 100% of the other 18353 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is PlainText Wallet Approval Checker safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.1.2) reached the registry 33 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, Date Math

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

PlainText — wallet approval translator

· Live status

Built on presign-guard: PlainText's verdicts now come from presign-guard (the same checks, sanctions list, wallet age and signed receipt); PlainText adds the explanation in plain language for people. POST /api/check-wallet ($0.04) uses presign-guard's approval audit, POST /api/explain ($0.03) its pre-sign check when the payload is a real approval, transaction or typed-data signature (anything else is explained by the model alone, source: "model"). Agents that only need the verdict and reason codes can call presign-guard directly ($0.01–$0.02). Needs FIZZL_INTERNAL_KEY (the same value on both services, Render only); without it the old path (GoPlus + Claude) runs.

A small Node.js app that looks up a wallet's token/NFT approvals via the GoPlus Security API and asks Claude to explain them in plain language.

▶ Watch the 1-minute explainer · Live: https://plaintext.fizzl.eu

Project structure

plaintext-wallet/

├── server.js Express backend (GoPlus + Anthropic calls) ├── media.js Serves the explainer video from the explainer-video branch ├── feedback.js POST /feedback and the MCP tool feedback (same file in every Fizzl service) ├── media/explainer/ Script and pipeline for the explainer video ├── package.json ├── render.yaml Render deploy config (optional, see below) ├── .env.example Copy to .env for local dev └── public/ └── index.html Frontend (wallet check + demo scenarios)

Feedback

Found a bug, or missing something? Send it with POST /feedback (free, no payment) or the MCP tool feedback:

curl -X POST https://plaintext.fizzl.eu/feedback \

-H 'content-type: application/json' \ -d '{"type": "feature", "message": "Support Solana wallets", "endpoint": "/api/check-wallet"}'

type is bug, feature or other; message is required (up to 2000 characters); endpoint and contact are optional. The answer is 202 with an id. At most 10 reports per hour per caller. Reports go to the usage log, and a person reads every one; nothing in a report is run or changed automatically. GET /feedback shows the schema.

1. Run it locally first

cd plaintext-wallet

npm install cp .env.example .env

edit .env and paste your ANTHROPIC_API_KEY

npm start

Open http://localhost:3000 — try the "Try a sample" tab first (no API keys needed besides Anthropic), then "Check a wallet" with a real address once you're happy it works.

2. Deploy to Render

Option A — one-click via render.yaml (Blueprint)

Push this folder to a new GitHub repo.
In the Render dashboard: New + → Blueprint → select your repo. Render reads render.yaml automatically and creates the web service.
When prompted, fill in the environment variables:

ANTHROPIC_API_KEY — required, from console.anthropic.com
GOPLUS_ACCESS_TOKEN — optional, only needed if you outgrow GoPlus's free 30 calls/minute limit (see console.gopluslabs.io)

Click Apply — Render builds and deploys automatically.

Option B — manual web service (no render.yaml needed)

Push this folder to a GitHub repo.
Render dashboard → New + → Web Service → connect your repo.
Settings:

Environment: Node
Build Command: npm install
Start Command: npm start
Instance Type: Free (fine for a prototype)

Under Environment Variables, add ANTHROPIC_API_KEY (and optionally GOPLUS_ACCESS_TOKEN).
Click Create Web Service. Render gives you a https:// .onrender.com URL once the build finishes.

Render's free tier spins the service down after inactivity — the first request after idling will take ~30-50 seconds to wake up. That's normal and fine for a prototype you're sharing for feedback.

Notes on the GoPlus integration

The wallet check calls token_approval_security or nft721_approval_security under https://api.gopluslabs.io/api/v2/.... This is documented but the GoPlus docs site is JS-rendered, so before you rely on this in front of real users, do one manual test call (e.g. with curl) against a wallet you control, and compare the actual JSON shape to what server.js expects — field names occasionally shift between GoPlus API versions.
The free GoPlus tier is capped at 30 calls/minute — plenty for early testing, but rate-limit errors will surface as a plain error message in the UI if you exceed it.
No user data is stored anywhere in this app — every check is a stateless round trip. If you later add accounts, saved wallets, or history, update this note (and your own privacy policy) accordingly.

Costs to expect

Render free tier: $0/month, with the cold-start behavior above. A paid tier ($7/month "Starter") removes the spin-down if this gets real usage.
Anthropic API: pay-per-use, billed to whatever key you provide. A single explanation call is small (well under 1K tokens), so cost per check will be a fraction of a cent — but keep an eye on your usage dashboard if this gets shared widely, since there's no rate limiting built into this prototype yet.

PlainText Wallet Approval Checker

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

Date Math

README from the maker

PlainText — wallet approval translator

Project structure

Feedback

1. Run it locally first

edit .env and paste your ANTHROPIC_API_KEY

2. Deploy to Render

Notes on the GoPlus integration

Costs to expect