A2A Gateway — Base Token Guard & x402 Settlement
Pre-trade Base token risk verdicts, EVM route simulation and code audits, paid per call over x402.
Description from the maker (original English)
Live crypto prices, conversion, gas tracker, portfolio tools, and calculators for AI agents.
These three are never merged into one score: opinions, measurements and popularity are different things.
We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.
Pick the AI app you use, then copy the settings.
COINGECKO_API_KEY, COINGECKO_PROValues marked secret are keys to your account. Never share them or paste them into a chat.
You need
Which app do you use?
Pick your app above. We remember it, so next time the button says “Install in …”.
Works in Claude on the web, desktop and mobile:
https://mcp-crypto-toolkit.nad33mahm3d.workers.dev/mcpOpen Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json
{
"mcpServers": {
"crypto-toolkit": {
"command": "npx",
"args": [
"-y",
"mcp-crypto-toolkit"
],
"env": {
"COINGECKO_API_KEY": "your-value",
"COINGECKO_PRO": "your-value"
}
}
}
}Run this in your terminal
claude mcp add --transport http crypto-toolkit https://mcp-crypto-toolkit.nad33mahm3d.workers.dev/mcpclaude mcp add crypto-toolkit --env COINGECKO_API_KEY=your-value --env COINGECKO_PRO=your-value -- npx -y mcp-crypto-toolkitFill in the empty values before running it.
Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"crypto-toolkit": {
"url": "https://mcp-crypto-toolkit.nad33mahm3d.workers.dev/mcp"
}
}
}Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"crypto-toolkit": {
"command": "npx",
"args": [
"-y",
"mcp-crypto-toolkit"
],
"env": {
"COINGECKO_API_KEY": "your-value",
"COINGECKO_PRO": "your-value"
}
}
}
}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.
Paste into .vscode/mcp.json in your project
{
"servers": {
"crypto-toolkit": {
"type": "http",
"url": "https://mcp-crypto-toolkit.nad33mahm3d.workers.dev/mcp"
}
}
}Paste into .vscode/mcp.json in your project
{
"servers": {
"crypto-toolkit": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"mcp-crypto-toolkit"
],
"env": {
"COINGECKO_API_KEY": "your-value",
"COINGECKO_PRO": "your-value"
}
}
}
}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:
https://mcp-crypto-toolkit.nad33mahm3d.workers.dev/mcpMenu names can differ slightly by plan and over time.
Your choice stays on this device in a cookie; no account needed.
COINGECKO_PRO envThese settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
The server did not answer when we last checked, so we could not read its tools.
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 10, 2026
The registry name was verified with the GitHub account nad33mahm3d, which owns the repo
We have not read this repo from GitHub yet
We have not read this repo from GitHub yet
Did not respond within 6 seconds when we checked
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Not checked yet; we read the tool list when we check the endpoint
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
It passed 1 of 2 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.
You need to fill in: COINGECKO_API_KEY
Either way works: install it on your computer or connect to the cloud version.
The GitHub repo last changed –, and the latest version (1.3.0) reached the registry 2 months ago.
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.
In the same category: A2A Gateway — Base Token Guard & x402 Settlement, PayStage Auth Watch, Diamond Bitcoin Intelligence
Servers in the same category from other makers, sorted by stars.
Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
Pre-trade Base token risk verdicts, EVM route simulation and code audits, paid per call over x402.
Read-only MCP tools to list and flag outstanding ERC-20, Permit2, and EIP-3009 auths
Bitcoin MCP for fee budgets, transaction proofs and address checks. Free service discovery.
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.
Live crypto prices, conversion, gas tracker, portfolio tools, and calculators for AI agents.
Ask Claude: *What's ETH doing? Top 10 coins? Gas on Base? What's my portfolio worth?*
Hosted (Claude.ai Custom Connector): https://mcp-crypto-toolkit.nad33mahm3d.workers.dev/mcp Docs: DeepWiki · mcpservers.org
COINGECKO_API_KEY for higher limits)npx -y mcp-crypto-toolkit
{
"mcpServers": { "crypto-toolkit": { "command": "npx", "args": ["-y", "mcp-crypto-toolkit"] } } }
Local build:
{
"mcpServers": { "crypto-toolkit": { "command": "node", "args": ["/ABSOLUTE/PATH/TO/mcp-crypto-toolkit/dist/index.js"] } } }
npm run build
npm run start:http
You do not need paid hosting for discoverability. This server already installs via npx -y mcp-crypto-toolkit (stdio) and is listed on the Official MCP Registry. Glama and PulseMCP ingest from there — no Fly/Railway bill required.
Only deploy HTTP if you want a remote /mcp endpoint (e.g. Claude.ai Custom Connector or Smithery URL publish).
Public hosted endpoint (Cloudflare Workers):
https://mcp-crypto-toolkit.nad33mahm3d.workers.dev/mcp
/mcp)Or deploy your own (Cloudflare / Docker / Render) and use https://YOUR-HOST/mcp. After upgrading a hosted server, remove and re-add the connector if tools still show as empty.
Do not put a remote URL in claude_desktop_config.json — that file is stdio-only. For Claude Desktop local use, prefer:
{
"mcpServers": { "crypto-toolkit": { "command": "npx", "args": ["-y", "mcp-crypto-toolkit"] } } }
Cloudflare Workers (recommended remote — free tier)
Uses the web-standard MCP transport (src/worker.ts) — no Docker required.
npm install
npx wrangler login npm run deploy:cf
After deploy: https://mcp-crypto-toolkit. .workers.dev/health Claude / Smithery URL: https://mcp-crypto-toolkit. .workers.dev/mcp
Local preview: npm run dev:cf
Optional secrets / vars:
npx wrangler secret put COINGECKO_API_KEY
npx wrangler secret put MCP_API_KEY # optional: require Bearer / x-api-key on /mcp
CI: add repo secrets CLOUDFLARE_API_TOKEN + CLOUDFLARE_ACCOUNT_ID — Worker auto-deploys on GitHub Release (and via workflow_dispatch).
Render (free — no credit card)
render.yaml uses the Free plan)https://YOUR-SERVICE.onrender.com/healthhttps://YOUR-SERVICE.onrender.com/mcpFree tier sleeps after ~15 min idle; first request may take ~30s to wake.
Docker (local / your own VPS)
docker build -t mcp-crypto-toolkit .
docker run -p 3000:3000 mcp-crypto-toolkit
Paid PaaS (if you outgrow free tier): Fly.io and Railway work with the included fly.toml / railway.toml but are not free long-term.
Optional env: COINGECKO_API_KEY, COINGECKO_PRO=1, gas oracle keys (see table below).
| Tool | Description |
|---|---|
get_price | Live price + market cap, volume, rank, ATH/ATL |
convert | Crypto ↔ fiat/crypto conversion |
search_coin | Search by name or symbol |
top_coins | Top N by market cap/volume + gainers/losers |
compare_coins | Side-by-side compare 2–5 coins |
portfolio_value | Value a list of holdings |
historical_price | Point date or range chart + investment snapshot |
gas_tracker | Gas fees + estimated transfer cost (USD) |
profit_calc | P&L, ROI, break-even (fees + network fee) |
trending | Trending coins + Fear & Greed Index |
| Prompt | Purpose |
|---|---|
market-overview | Top coins + trending + market tone |
whats-trending | Trending coins + Fear & Greed |
analyze-coin | Price + 7d trend for one coin |
trade-pnl | Walk through a P&L calc |
gas-check | Gas + transfer cost advice |
git clone https://github.com/nad33mahm3d/mcp-crypto-toolkit
cd mcp-crypto-toolkit npm install npm test npm run build npm run inspector
| Variable | Purpose |
|---|---|
COINGECKO_API_KEY | Higher CoinGecko rate limits (still optional) |
COINGECKO_PRO=1 | Use Pro header with your key |
MCP_API_KEY | Worker only: require Bearer / x-api-key on /mcp |
RATE_LIMIT_PER_MINUTE | Worker only: default 60 |
ETHERSCAN_API_KEY / BSCSCAN_API_KEY / … | Better gas oracles |
OPTIMISM_API_KEY | Optimism gas oracle |
PORT | HTTP server port (default 3000) |
Without gas API keys, gas falls back to Blocknative then static estimates.
See CONTRIBUTING.md for setup, PR guidelines, and the release process.
nad33mahm3d/mcp-crypto-toolkit, workflow publish.yml, environment `release`, allow `npm publish`CHANGELOG.mdvX.Y.ZNPM_TOKEN; provenance automatic)MIT — see LICENSE