POPCORN MCP for Claude Code

io.github.violetclaire/popcorn-mcp

Signed time and SHA-256 witness receipts for agents, with offline verification and x402 payment.

client:Claude Code transport:stdio runtime:npm

Install POPCORN MCP in Claude Code

run in your project directory

claude mcp add popcorn-mcp -e EVM_PRIVATE_KEY=<EVM_PRIVATE_KEY> -- npx -y @violetclaire/popcorn-mcp

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs