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Gas Oracle API

br0ski777/gas-oracle-x402

Pulls real-time gas price data for Ethereum and Base networks through a dedicated API endpoint. You get current gwei rates across priority tiers (low, medium, high) and USD cost estimates for common operations like swaps and transfers. Built with x402 USDC micropayments integration, so each API call costs a small amount rather than requiring API keys or subscriptions. Reach for this when you're building crypto tools that need to help users time transactions or estimate fees before they commit. The MCP server connects via SSE transport and talks to gas-oracle.api.klymax402.com under the hood.

tool
1
transport
SSE
last updated
May 16, 2026
View on GitHub

Tools

1 tools

Public tool metadata for what this MCP can expose to an agent.

gas_get_current_priceUse this when you need current gas prices before submitting a transaction. Returns gas tiers and USD cost estimates in JSON. 1. slow: gas price in gwei for slow confirmation (~5 min) 2. standard: gas1 params

Use this when you need current gas prices before submitting a transaction. Returns gas tiers and USD cost estimates in JSON. 1. slow: gas price in gwei for slow confirmation (~5 min) 2. standard: gas

Parameters* required
chainstring
Blockchain network (default: base)one of base · ethereum

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Readme

Gas Oracle API

MCP Server x402 License: MIT

Live gas prices with gwei tiers, USD cost estimates, and congestion level. Time your transactions perfectly. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

{
  "mcpServers": {
    "gas-oracle": {
      "url": "https://gas-oracle.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

curl "https://gas-oracle.api.klymax402.com/api/price"
# -> 402 Payment Required, with an x402 payment challenge in the response body

View the full README on GitHub

Details

Repository
github.com/br0ski777/gas-oracle-x402
Website
github.com/Br0ski777/gas-oracle-x402
Category
Finance & Commerce
Transport
SSE
Registry
MCP registry, active

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