Base Tx Preflight for Claude.ai

com.madebydevx.preflight/preflight

Simulate a Base tx before signing: revert reason, gas limit, full fee in ETH/USD. Paid x402.

client:Claude.ai transport:streamable-http tools:2

Install Base Tx Preflight in Claude.ai

Settings → Connectors → Add custom connector

https://preflight.madebydevx.com/mcp

Claude on the web takes a remote URL and completes OAuth in the browser. For a packaged server use Claude Desktop or Claude Code instead. Claude.ai docs

What Claude.ai can do once it is connected

preflight_quote
preflight_validate

Base Tx Preflight in other clients

Claude Code
Claude Desktop
Cursor
VS Code
Zed
Windsurf
Cline
Gemini CLI
Grok
ChatGPT
LangChain

Base Tx Preflight MCP server