Countersign for Claude.ai

ai.llpro.countersign/countersign

Independent, signed check of AI work: math, quotes, sources, links, code. Public verifiable log.

client:Claude.ai transport:streamable-http tools:9

Install Countersign in Claude.ai

Settings → Connectors → Add custom connector

https://countersign.llpro.ai/mcp?via=mcp-registry

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

countersign_stamp
countersign_verify
countersign_log
feedback.submit
feedback_submit
launchpad.start
launchpad_start
launchpad.progress
launchpad_progress

Countersign in other clients

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

Countersign MCP server