# Multi-Chain Gas Estimator — ETH, Base, Polygon, Arb

> Multi-Chain Gas Estimator — ETH, Base, Polygon, Arb — axel-belfort-gas-estimator. Use this tool when you need to optimize transaction costs across multiple blockchain chains, such as Ethereum, Base, Polygon, Arbitrum, and BSC. It provides a single API call to compare gas prices and find the cheapest chain for your transaction, solving problems related to cross-chain cost optimization and deployment decisions. The tool returns gas prices for all supported chains in one response, with no API key required and a micropayment fee of $0.002 per call.

Canonical page: https://skillsregistry.net/skills/axel-belfort-gas-estimator  
JSON: https://api.skillsregistry.net/v1/skills/axel-belfort-gas-estimator

## Description

Multi-chain gas price API for AI agents. Compare gas prices across Ethereum, Base, Polygon, Arbitrum, and BSC in a single call. Find the cheapest chain for your transaction.

Tools: crypto_estimate_gas.

Use this when choosing between chains for deployment, bridging decisions, or cross-chain cost optimization. IMPORTANT: For Ethereum-only gas, use gas_get_current_price for more detail.

Returns gas prices for all chains in one response. No API key required — x402 micropayment $0.002/call on Base L2.

## Trust

- **Trust score (0–1):** 0.73
- **Verification tier:** verified
- **Last scanned:** 2026-08-30

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** devops-ci
- **Updated:** 2026-08-30

## Source

- **Source listing:** [Smithery](https://smithery.ai/server/axel-belfort/gas-estimator)
- **Repository:** <https://github.com/Br0ski777/gas-estimator-x402>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "axel-belfort-gas-estimator"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/axel-belfort-gas-estimator` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/axel-belfort-gas-estimator/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt