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Gas Estimator API MCP Server

by br0ski777 Your server? Claim it
not responding

Gas Estimator API is listed as active in the registry but did not answer our last check. It exposes 1 tools. Last commit 2 Sep 2026.

Multi-chain gas estimation — ETH, Base, Polygon, Arbitrum, BSC. x402 micropayment.

Uptime history 91 days of history · worst day 0%
91 days agonow
0.0%
Uptime 24h
0 of 91 checks
1
Tools
read from the server
6 ms
Response time
average over 24h
0
Stars
last commit 2 Sep 2026

Gas Estimator API does not always answer

Over the last week it answered 0.0% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 11 min ago.

run in your terminal
claude mcp add gas-estimator --transport sse https://gas-estimator.api.klymax402.com/mcp
Settings → Connectors → Add custom connector, then paste this address
https://gas-estimator.api.klymax402.com/mcp
~/.codex/config.toml
[mcp_servers.gas-estimator]
url = "https://gas-estimator.api.klymax402.com/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "gas-estimator": {
      "url": "https://gas-estimator.api.klymax402.com/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "gas-estimator": {
      "type": "sse",
      "url": "https://gas-estimator.api.klymax402.com/mcp"
    }
  }
}

Available tools 1

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

crypto
crypto_estimate_gas
Use this when you need to compare gas prices across multiple EVM chains at once. Returns multi-chain gas estimates in JSON. 1. chains: array of chain gas data with chain name 2. low: gas price in gwei for slow confirmation 3. medium: gas price in gwei for standard confirmation 4. high: gas price in gwei for fast confirmation 5. transferCostUsd: estimated USD cost for a simple transfer on each chain 6. cheapestChain: which chain currently has the lowest gas cost Example output: {"chains":[{"chain":"base","low":0.005,"medium":0.008,"high":0.012,"transferCostUsd":0.01},{"chain":"ethereum","low":12.5,"medium":18.0,"high":25.0,"transferCostUsd":0.85}],"cheapestChain":"base"} Use this FOR choosing the cheapest chain before a cross-chain transaction. Essential for multi-chain agents that need to optimize gas costs. Do NOT use for single-chain gas only -- use gas_get_current_price instead. Do NOT use for swap quotes -- use dex_get_swap_quote instead. Do NOT use for bridging -- use bridge_find_best_route instead.

Endpoints

URLTransportStateLatencyChecked
https://gas-estimator.api.klymax402.com/mcp sse answering 6 ms 11 min ago

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Gas Estimator API — questions

Answers built from our own checks of this server.

What can Gas Estimator API do?
It exposes 1 tools, read directly from the server on our last check. Among them: crypto_estimate_gas. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is Gas Estimator API working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 0 of 91 checks got a reply (0.0%), average response time 6 ms. The bar chart above shows every period we have measured.
The registry lists Gas Estimator API as active — why does it not respond?
The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.
How do I connect Gas Estimator API?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Gas Estimator API need an API key?
No. Gas Estimator API completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 1 of them are readable on this page. This is what we observed, not what the docs claim.
Is Gas Estimator API open source?
The code is open source: it is published under the MIT licence, written in TypeScript and 0 stars on GitHub. The licence covers the code in the repository, not the hosted service at gas-estimator.api.klymax402.com, which runs on its operator's own terms.