# io.github.memosr/base-gas-mcp (npm · base-gas-mcp)

Live Base gas, tx cost in USD, 4-chain comparison and gas history. Paid per call in USDC via x402.

- Trust score: 73/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-23

## Components

- npm · `base-gas-mcp`: 73/100 (this document), [markdown](https://verifymcp.io/servers/memosr-base-gas-mcp/base-gas-mcp.md), [page](https://verifymcp.io/servers/memosr-base-gas-mcp/base-gas-mcp)

## Channel facts

- Registry: `npm`
- Package: `base-gas-mcp`
- Version: `0.3.2`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-10-23.

- **Supply Chain Security**: 99/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - 32 of 118 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 4 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 80/100
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 570 tokens (~114/item across 5 items; 5 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 17/100
  - Stability observed for 5 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 5 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 5 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the io.github.memosr/base-gas-mcp server?

io.github.memosr/base-gas-mcp runs locally as an npm package, launched with npx -y base-gas-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add memosr-base-gas-mcp -- npx -y base-gas-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "memosr-base-gas-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "base-gas-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "memosr-base-gas-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "base-gas-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add memosr-base-gas-mcp -- npx -y base-gas-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "memosr-base-gas-mcp": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "base-gas-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add memosr-base-gas-mcp --command npx --arg -y --arg base-gas-mcp
```

### Hermes

```yaml
mcp_servers:
  memosr-base-gas-mcp:
    command: "npx"
    args: ["-y", "base-gas-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "memosr-base-gas-mcp": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "base-gas-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add memosr-base-gas-mcp -t stdio -c npx -a -y base-gas-mcp
```

### Other

```json
{
  "mcpServers": {
    "memosr-base-gas-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "base-gas-mcp"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-10-21 (score 73, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-19 (score 72, +1)

- [security regression] Stability: 0.00 → unverified
- [security regression] Tool safety: pass → unverified
- [functional regression] Capabilities: pass → unverified
- [functional regression] Tool coverage: 100 → unverified
- [functional] First check of Schema quality: unverified
- [functional] Package version: 0.3.1 → 0.3.2

### 2026-10-18 (score 71)

First indexed and scored.

## MCP tools (5)

### `get_base_gas` (~156 tokens)

Live Base gas and transaction cost

Live Base mainnet gas: EIP-1559 base fee, low/medium/high priority fees in gwei, the cost of a transaction in USD, ETH and gwei, and ready-to-sign maxFeePerGas / maxPriorityFeePerGas. Costs about $0.002. Each call makes a real USDC micropayment on Base mainnet via x402 from BUYER_PRIVATE_KEY; payments above MAX_USD_PER_CALL are refused. Do not call it in loops.

Input parameters:

- `gasLimit` (integer): Gas units to price. 21000 ETH transfer (default), ~65000 ERC-20 transfer, ~85000 NFT mint, ~180000 Uniswap swap, ~1500000 contract deploy.

### `compare_gas_costs` (~134 tokens)

Compare gas costs across Base, OP, Arbitrum and Ethereum

Live cost of the same transaction on Base, OP Mainnet, Arbitrum One and Ethereum, in USD and ETH, ranked cheapest first. Costs about $0.01. Each call makes a real USDC micropayment on Base mainnet via x402 from BUYER_PRIVATE_KEY; payments above MAX_USD_PER_CALL are refused. Do not call it in loops.

Input parameters:

- `gasLimit` (integer): Gas units to price. 21000 ETH transfer (default), ~65000 ERC-20 transfer, ~85000 NFT mint, ~180000 Uniswap swap, ~1500000 contract deploy.

### `get_gas_history` (~116 tokens)

Base gas history and verdict

Base gas sampled every 5 minutes over a lookback window (default 24h): min/max/average/median and whether gas is cheap, normal, expensive or flat right now. Costs about $0.01. Each call makes a real USDC micropayment on Base mainnet via x402 from BUYER_PRIVATE_KEY; payments above MAX_USD_PER_CALL are refused. Do not call it in loops.

Input parameters:

- `hours` (integer): Lookback window in hours, 1 to 168. Default 24.

### `get_cheapest_window` (~120 tokens)

When to transact on Base

From 7 days of Base gas history: the hours of day to avoid, the cheapest hour (UTC), and the saving versus the average hour in percent and USD. Says so plainly when timing saves nothing. Costs about $0.02. Each call makes a real USDC micropayment on Base mainnet via x402 from BUYER_PRIVATE_KEY; payments above MAX_USD_PER_CALL are refused. Do not call it in loops.

Input parameters:

- `hours` (integer): Lookback window in hours, 1 to 168. Default 168.

### `get_service_status` (~44 tokens)

Service status and history coverage (free)

Free, no wallet needed. Reports whether the gas service is up and how much gas history it has collected, so you can decide whether the history tools are worth paying for.

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/memosr-base-gas-mcp/base-gas-mcp#diagnostics

## Score history

- 2026-10-23: 73
- 2026-10-22: 73
- 2026-10-21: 73
- 2026-10-20: 72
- 2026-10-19: 72
- 2026-10-18: 71

## Common questions

### What is the io.github.memosr/base-gas-mcp server?

io.github.memosr/base-gas-mcp is listed in the public MCP registry as io.github.memosr/base-gas-mcp. Live Base gas, tx cost in USD, 4-chain comparison and gas history. Paid per call in USDC via x402. This page covers its npm package (base-gas-mcp).

### Is the io.github.memosr/base-gas-mcp server safe to use?

io.github.memosr/base-gas-mcp scores 73 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 23 October 2026. It declares no install or post-install scripts. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the io.github.memosr/base-gas-mcp server expose?

io.github.memosr/base-gas-mcp exposes 5 tools: get_base_gas, compare_gas_costs, get_gas_history, get_cheapest_window, get_service_status. Their descriptions and schemas cost roughly 570 tokens of context every time the server is loaded.

### Is the io.github.memosr/base-gas-mcp server still maintained?

io.github.memosr/base-gas-mcp is still listed as active in the MCP registry. We last reached this channel on 23 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What licence is the io.github.memosr/base-gas-mcp server under?

io.github.memosr/base-gas-mcp declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- npm package: https://www.npmjs.com/package/base-gas-mcp
- Socket report: https://socket.dev/npm/package/base-gas-mcp
- Repository: https://github.com/memosr/base-gas-mcp
- Website: https://base-gas-x402.vercel.app/
- Changelog RSS feed: https://verifymcp.io/servers/memosr-base-gas-mcp/base-gas-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/memosr-base-gas-mcp/base-gas-mcp.json
- HTML version of this page: https://verifymcp.io/servers/memosr-base-gas-mcp/base-gas-mcp