Interrupt Index

Give your agent this instruction

Paste this into your agent’s system prompt or tool-use instructions so it checks agent-friendliness before it signs up for or pays for anything on your behalf.

Before signing up for or purchasing any tool or API on my behalf, check its agent-friendliness first: fetch http://api:3001/v1/listings.json and find the vendor by domain. Prefer tools badged Zero-Interrupt or Low-Interrupt. Treat Blocked tools — ToS bot-bans, per-transaction human checkpoints — as unusable without asking me first. Score details: https://interruptindex.com/tools/{slug}. Full methodology: https://interruptindex.com/methodology.

Wire this into your agent (MCP)

The Interrupt Index MCP server exposes a lookup_tool your agent calls itself before it signs up for or pays for anything on your behalf — no prompt to paste. Install it once and every supported session gets agent-readiness checks at decision time.

Once published (the interrupt-index-mcp package is currently private/unpublished, so npx 404s until then), this one-liner is all you need:

claude mcp add interrupt-index -- npx -y interrupt-index-mcp

Until we publish the package, run it from source:

claude mcp add interrupt-index -- node /path/to/apps/mcp/dist/src/index.js