Gas Estimator API vs Swap API

In-depth architectural comparison of the Gas Estimator API and Swap API MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

Which MCP Server Should You Choose?

Choose Gas Estimator API when:

• You need dedicated capabilities in the Finance & Fintech domain.
• You prefer remote streaming HTTP/SSE transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).
• Primary tools included: crypto_estimate_gas, chain.

Explore Gas Estimator API Details

Choose Swap API when:

• You need dedicated capabilities in the Finance & Fintech domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).
• Primary tools included: EVM token-swap calldata generation, Quote and price-impact details, Configurable maximum slippage.

Explore Swap API Details

Feature & Specification Comparison

Specification	Gas Estimator API Finance & Fintech	Swap API Finance & Fintech
Summary	Multi-chain gas estimation — ETH, Base, Polygon, Arbitrum, BSC. x402 micropayment.	MCP server for SwapAPI - get executable token swap calldata for EVM chains
Category & Scope	Finance & Fintech	Finance & Fintech
Quality signal

Tools & Capabilities Breakdown

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

{
  "mcpServers": {
    "gas-estimator-api": {
      "url": "https://gas-estimator.api.klymax402.com/mcp"
    }
  }
}

{
  "mcpServers": {
    "mcp-207": {
      "command": "npx",
      "args": [
        "-y",
        "@swapapi/mcp"
      ]
    }
  }
}

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