Skip to content

TokenOS Gas & Fee Tracker

by tokenos.ai · remote · no sign-in to list tools · v1.0.1 · published by ai.tokenos

Live fees on five chains

Changes · 3
CompareRegistry entry

3 tools: 3 change things.

Scanned Oct 21, 2026

1 check matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http gas-tracker https://tokenos.ai/api/mcp/apps/gas-tracker

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warncheapest_chain_to_deploy

    The server marks "cheapest_chain_to_deploy" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "cheapest_chain_to_deploy" says "deploy": a word for a change.

    What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

3 tools

Changes things 3Claude Code: ask
  • cheapest_chain_to_deployRank Ethereum, Base, Arbitrum, Robinhood Chain and Solana by the cost of deploying a contract or program of a given bytecode size.1 finding

    Why it is in this group

    • The name "cheapest_chain_to_deploy" says "deploy": a word for a change.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "cheapest_chain_to_deploy" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "cheapest_chain_to_deploy" says "deploy": a word for a change.

      What this check looks for
    Description, as the server wrote it
    Rank Ethereum, Base, Arbitrum, Robinhood Chain and Solana by the cost of deploying a contract or program of a given bytecode size.

    Annotations the server declares

    • title: Cheapest chain to deploy
    • readOnlyHint: true
    • openWorldHint: true
    • destructiveHint: false
    • idempotentHint: true
  • estimate_tx_costCost of one transaction on a chain at a speed tier, by transaction type (transfer, erc20_transfer, swap, nft_mint, deploy) or explicit gas / compute units.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Cost of one transaction on a chain at a speed tier, by transaction type (transfer, erc20_transfer, swap, nft_mint, deploy) or explicit gas / compute units.

    Annotations the server declares

    • title: Estimate a transaction cost
    • readOnlyHint: true
    • openWorldHint: true
    • destructiveHint: false
    • idempotentHint: true
  • gas_nowCurrent fees on Ethereum, Base, Arbitrum, Robinhood Chain and Solana: base fee, slow/standard/fast tiers, USD cost per transaction type, trend and the cheapest chain.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Current fees on Ethereum, Base, Arbitrum, Robinhood Chain and Solana: base fee, slow/standard/fast tiers, USD cost per transaction type, trend and the cheapest chain.

    Annotations the server declares

    • title: Live gas fees
    • readOnlyHint: true
    • openWorldHint: true
    • destructiveHint: false
    • idempotentHint: true

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.0.1. Values in angle brackets are yours to fill in.

claude mcp add --transport http gas-tracker https://tokenos.ai/api/mcp/apps/gas-tracker

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [],
    "ask": [
      "mcp__gas-tracker__gas_now",
      "mcp__gas-tracker__estimate_tx_cost",
      "mcp__gas-tracker__cheapest_chain_to_deploy"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as gas-tracker. Review it before you use it.