MCP server

x402 Bazaar Listing Monitor

com.acjlabs/x402-listing-monitor

Checked 28 Oct 2026, 09:03 UTC · Connected to it and listed its tools

Checks x402 Bazaar resource listings against the public discovery catalog and flags drops.

Working at last checkVerified publisher: acjlabs.comAbout 191 tokens per request once connected1 tools

https://x402-listing-monitor.acjlabs.com/mcp

At a glance

Type: MCP server
Publisher: acjlabs.com (verified by the MCP Registry)
Status: Working at last check
Tools: 1
Token cost: About 191 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 28 Oct 2026, 09:03 UTC

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http x402-listing-monitor https://x402-listing-monitor.acjlabs.com/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.x402-listing-monitor]
url = "https://x402-listing-monitor.acjlabs.com/mcp"

Gemini CLI

{"mcpServers":{"x402-listing-monitor":{"httpUrl":"https://x402-listing-monitor.acjlabs.com/mcp"}}}

Cursor

{"mcpServers":{"x402-listing-monitor":{"url":"https://x402-listing-monitor.acjlabs.com/mcp"}}}

VS Code

{"servers":{"x402-listing-monitor":{"type":"http","url":"https://x402-listing-monitor.acjlabs.com/mcp"}}}

Antigravity

agy mcp add x402-listing-monitor https://x402-listing-monitor.acjlabs.com/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"x402-listing-monitor","server_url":"https://x402-listing-monitor.acjlabs.com/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"x402-listing-monitor","server_url":"https://x402-listing-monitor.acjlabs.com/mcp"}

check_listing_health ~191 tokens
Checks whether a seller's x402 Bazaar resources are currently listed under the given payTo address in the public discovery catalog. Flags each resource as listed or missing — the same per-seller diff the registered poller runs on a schedule, run once on demand for a payTo/resources pair whether or n

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