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.