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Live Ethereum and L2 gas fees for AI agents: current gas, cheapest L2, ETH price, cost estimates.
About
Live Ethereum and L2 gas fees for AI agents: current gas, cheapest L2, ETH price, cost estimates.
Security Report
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.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
What You'll Need
Set these up before or after installing:
Environment variable: GASFEE_API_BASE
How to Install
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"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
Gas Fee Predictor — MCP Server
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.
Tools
| 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. |
Install
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.
Configure your client
Claude Desktop
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?"
OpenClaw / Cursor / Cline
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.
Config
| Env var | Default | Purpose |
|---|---|---|
GASFEE_API_BASE | https://api.gasfeepredictor.com | Override the API base. |
Notes
- Read-only and unauthenticated — it only reads public gas data.
- Data refreshes ~every 30–60s upstream.
- MIT licensed.
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