Receipt — sign an agent's work, verify it offline for Claude.ai

io.github.ecstatica/ggbank-receipt

Ed25519 receipts over work artifacts: issue and verify offline, no account, no chain, no network.

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

Install Receipt — sign an agent's work, verify it offline in Claude.ai

Settings → Connectors → Add custom connector

https://receipt.whirlwindcorp.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

issue_receipt
verify_receipt

Receipt — sign an agent's work, verify it offline in other clients

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

Receipt — sign an agent's work, verify it offline MCP server