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mcp/harbor
Verified official

aspern MCP

v1.0.0

org.aspern/aspern

What the chain records about an address before you pay it, and whether a payment fits it.

transport:streamable-http tools:5
Website

Target client

run in your project directory 

claude mcp add --transport http aspern https://aspern.org/mcp

setup guides: Claude Code Claude Desktop Cursor VS Code Zed Windsurf Cline Gemini CLI Grok ChatGPT Claude.ai LangChain

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

preflight_payment

preflight payment

counterparty_check

counterparty check

find_agents Read-only

find agents

counterparty_history

counterparty history

counterparty_bulk

counterparty bulk

All 5 tools, one page each

Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. Check the server's own documentation before granting access.