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Live Ethereum and L2 gas fees for AI agents: current gas, cheapest L2, ETH price, cost estimates.
Live Ethereum and L2 gas fees for AI agents: current gas, cheapest L2, ETH price, cost estimates.
This is a well-written, read-only MCP server that wraps a public, unauthenticated gas fee prediction API. The code is clean, properly handles errors, and has no malicious patterns or credential storage issues. Minor quality suggestions around input validation and timeout configuration exist but do not represent security risks. Supply chain analysis found 2 known vulnerabilities in dependencies (0 critical, 2 high severity). Package verification found 1 issue.
3 files analyzed · 6 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
This plugin requests these system permissions. Most are normal for its category.
Set these up before or after installing:
Environment variable: GASFEE_API_BASE
Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-higherbeing-gasfeepredictor-mcp": {
"env": {
"GASFEE_API_BASE": "your-gasfee-api-base-here"
},
"args": [
"-y",
"gasfeepredictor-mcp"
],
"command": "npx"
}
}
}From the project's GitHub README.
Live Ethereum + Layer-2 gas-fee data for AI agents, via the Model Context Protocol. Works with Claude Desktop, OpenClaw, Cursor, Cline, and any other MCP client.
It's a thin, read-only wrapper over the free public API at
https://api.gasfeepredictor.com (no key, no auth). Every answer includes a
citation back to gasfeepredictor.com.
| Tool | What it answers |
|---|---|
get_current_gas | "What's the Ethereum gas fee right now?" — low/avg/high Gwei, ETH price, send-now-vs-wait. |
get_l2_gas | "Cheapest L2 right now?" — live Arbitrum / Base / Optimism / Polygon fees. |
get_eth_price | Current ETH/USD and 24h change. |
best_time_to_transact | Send now or wait? Next cheaper window + expected savings. |
estimate_transaction_cost | USD cost of an ETH transfer / USDC transfer / Uniswap swap / NFT mint (or custom gas), per tier. |
With npm (once published):
npx gasfeepredictor-mcp
Or from source:
git clone https://github.com/higherbeing/gasfeepredictor-mcp
cd gasfeepredictor-mcp
npm install
npm start
Requires Node ≥ 18.
Add to claude_desktop_config.json (macOS:
~/Library/Application Support/Claude/claude_desktop_config.json):
{
"mcpServers": {
"gasfeepredictor": {
"command": "npx",
"args": ["-y", "gasfeepredictor-mcp"]
}
}
}
(Or use "command": "node", "args": ["/absolute/path/to/gasfeepredictor-mcp/index.mjs"] to run from source.)
Restart Claude Desktop, then ask: "What's the Ethereum gas fee right now, and is it cheaper on an L2?"
Any MCP-capable client uses the same shape — register a stdio server with
command: npx, args: ["-y", "gasfeepredictor-mcp"] (or node + the path to
index.mjs) in that client's MCP servers config.
| Env var | Default | Purpose |
|---|---|---|
GASFEE_API_BASE | https://api.gasfeepredictor.com | Override the API base. |
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