Live Base gas, tx cost in USD, 4-chain comparison and gas history. Paid per call in USDC via x402.
Connect Runs on your machine
claude mcp add base-gas-mcp -e BUYER_PRIVATE_KEY=<BUYER_PRIVATE_KEY> -e MAX_USD_PER_CALL=<MAX_USD_PER_CALL> -- npx -y [email protected]{
"mcpServers": {
"base-gas-mcp": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"BUYER_PRIVATE_KEY": "<BUYER_PRIVATE_KEY>",
"MAX_USD_PER_CALL": "<MAX_USD_PER_CALL>"
}
}
}
}{
"mcpServers": {
"base-gas-mcp": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"BUYER_PRIVATE_KEY": "<BUYER_PRIVATE_KEY>",
"MAX_USD_PER_CALL": "<MAX_USD_PER_CALL>"
}
}
}
}{
"servers": {
"base-gas-mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"BUYER_PRIVATE_KEY": "<BUYER_PRIVATE_KEY>",
"MAX_USD_PER_CALL": "<MAX_USD_PER_CALL>"
}
}
}
}Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
BUYER_PRIVATE_KEYRequired, secret | Private key of a Base mainnet wallet holding a little USDC. Pays $0.002 to $0.02 per call. Use a separate wallet with small funds. |
MAX_USD_PER_CALLOptional | Refuse any single payment above this many USD. Default 0.05. |
Details
| Package | [email protected] (NPM, stdio) |
| First published | 18 Oct 2026 |
| Last updated | 18 Oct 2026 |
| Registry name | io.github.memosr/base-gas-mcp |
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