Runtime security for AI agent commerce. CLI + MCP server blocks hallucinated purchases.
To add pop-pay to Claude, run the install command below or copy the ready-made config for Claude Code, Claude Desktop, Cursor and VS Code further down. Restart your client after adding it and its tools show up in your next conversation. It declares 5 environment variables, listed below.
Install
npx -y pop-pay@0.5.7Environment variables
POP_CDP_URLSet in your MCP configPOP_ALLOWED_CATEGORIESSet in your MCP configPOP_MAX_PER_TXSet in your MCP configPOP_MAX_DAILYSet in your MCP configPOP_GUARDRAIL_ENGINESet in your MCP configSet only if the maker requires them; this listing does not flag any of them as required.
Install with your client
claude mcp add pop-pay --env POP_CDP_URL=<YOUR_POP_CDP_URL> --env POP_ALLOWED_CATEGORIES=<YOUR_POP_ALLOWED_CATEGORIES> --env POP_MAX_PER_TX=<YOUR_POP_MAX_PER_TX> --env POP_MAX_DAILY=<YOUR_POP_MAX_DAILY> --env POP_GUARDRAIL_ENGINE=<YOUR_POP_GUARDRAIL_ENGINE> -- npx -y pop-pay@0.5.7
Run this in a terminal to add the server to Claude Code.
What this does
pop-pay exposes a set of tools to Claude over the Model Context Protocol. After you add it to claude_desktop_config.json (snippet above) and restart Claude Desktop, those tools become callable inside any conversation.
Requirements
This server declares the following environment variables. Set only the ones the maker requires for your setup; this listing does not flag any of them as required:
POP_CDP_URL POP_ALLOWED_CATEGORIES POP_MAX_PER_TX POP_MAX_DAILY POP_GUARDRAIL_ENGINE
Set these via the env object in your MCP config (see claude_desktop_config.json snippet above).
Frequently asked questions
How do I install pop-pay?
Run the Claude Code command in the install section to add pop-pay to Claude Code, or copy the ready-made config for your client from the install section on this page. Restart your client afterwards and the tools appear in your next conversation.
Which clients work with pop-pay?
This page carries setup and config for Claude Code, Claude Desktop, Cursor and VS Code. Any other MCP client that accepts a standard server config can connect to pop-pay as well.
Does pop-pay need an API key?
This listing does not flag an API key as required. The server can use these environment variables: POP_CDP_URL, POP_ALLOWED_CATEGORIES, POP_MAX_PER_TX, POP_MAX_DAILY, POP_GUARDRAIL_ENGINE; the maker's docs say which of them your setup needs. They go in the env block of your MCP config.
Imported from the Official MCP Registry. The details above come from the registry entry; the maker can claim this listing to correct them, add docs, and see its traffic.
Is this your MCP server?
Claim this listing to see its traffic, fix details yourself, and skip the review queue on future updates.
Add this badge to your README
Show visitors this server is listed in the ClaudeRules directory. The badge links straight to this listing.
[](https://clauderules.net/mcp/io-github-100xpercent-pop-pay)<a href="https://clauderules.net/mcp/io-github-100xpercent-pop-pay" target="_blank" rel="noopener noreferrer"><img src="https://clauderules.net/api/badge/io-github-100xpercent-pop-pay" alt="Listed on clauderules.net" /></a>More AI MCP servers
GitHub
Connect AI assistants to GitHub - manage repos, issues, PRs, and workflows through natural language.
Serena MCP: the IDE for your agent
A powerful toolkit for coding, providing semantic retrieval and editing capabilities.
MCP Toolbox for Databases
MCP Toolbox for Databases enables your agent to connect to your database.
Figma-Context-MCP
Give your coding agent access to your Figma data. Implement designs in any framework in one-shot.