MCP server: One MCP server.MCP server: One MCP server.
Mgo
@chain-opsRun by its publisher: served from their own domain, namespace checked by the registry.MCP server · External
Compare live gas across up to 9 EVM chains and get the cheapest one. x402 pay-per-call on Base.
Freeno charge per call
One address for any MCP client. No sign-in needed on this server.
What it does
4 read
Grouped by tool name. At most: only reads or looks up information.
What it costs
FreeOdel charges nothing per call. The publisher may charge for its own service.
Tools
4 · grouped by tool name · checked 11 Oct 2026Read · 4Look things up
- get_gas_demo
- get_cheapest_chain
- get_gas_basic
- get_gas_premium
MGO — Multi-chain Gas Optimizer
An x402-native API that compares real-time gas prices across up to 9 EVM chains and recommends the cheapest one. Built for trading agents, DeFi bots, and any AI agent that needs to optimize transaction costs.
Quick Start
bash
# 1. Install dependencies
npm install
# 2. Set environment variables
cp .env.example .env
# Set WALLET_ADDRESS to your USDC receiving wallet on Base
# 3. Run locally
npm run dev
# 4. Test
# Open in browser: http://localhost:3000/gas/demo
Tiers
| Feature | Demo (Free) | Basic ($0.001) | Premium ($0.002) |
|---|---|---|---|
| Chains | 4 | 4 | 9 |
| Gas prices | Yes | Yes | Yes |
| Cheapest chain recommendation | No | Yes | Yes |
| Savings % calculation | No | Yes | Yes |
| Cost savings estimate | No | Yes | Yes |
| BNB, Polygon, Avalanche, zkSync, Hyperliquid | No | No | Yes |
| Rate limit | 10/hr, 100/day | Unlimited | Unlimited |
Endpoints
| Endpoint | Payment | Description |
|---|---|---|
GET /gas/demo | Free | Raw gas prices only (10/hr rate limit) |
GET /gas/basic | $0.001 USDC (x402) | 4-chain comparison + recommendation + savings |
GET /gas/premium | $0.002 USDC (x402) | 9-chain full comparison |
GET /llms.txt | Free | AI agent discovery file |
GET /health | Free | Server health check |
Payment Flow (x402 Protocol)
GET /gas/basicor/gas/premium→ 402 response with payment requirements- Client signs EIP-712 USDC authorization (using x402-axios or x402-fetch)
- Resend with
X-PAYMENTheader → facilitator verifies → data response → on-chain settlement
javascript
// Client example (x402-axios)
const { withPayment } = require("x402-axios");
const client = withPayment(axios.create(), walletClient);
const response = await client.get("https://api.mgo.chain-ops.xyz/gas/basic");
MCP Server (Claude / Cursor)
bash
npm run mcp
Add to Claude Desktop config:
json
{
"mcpServers": {
"mgo-gas": {
"command": "node",
"args": ["/path/to/x402-gas-api/mcp-server.js"]
}
}
}
Deploy to Vercel
bash
npm i -g vercel
vercel --prod
Platform Registration
- BlockRun — Register MCP server URL
- Dexter — One-line facilitator config
- x402.org — Automatic llms.txt crawling
