x402 Bazaar Listing Monitor

https://server.smithery.ai/acjlabs/x402-listing-monitor/mcp

● healthy

Scheduled watchdog for x402 sellers: polls Coinbase CDP's public Bazaar discovery catalog for your registered resources and payTo address, flagging a drop or a recovery — instead of finding out from a revenue dip days later. **How it works:** register a payTo address and resource URLs once; a scheduled poll diffs them against the live discovery catalog and alerts on a state change. The `check_listing_health` MCP tool runs the same scoped diff on demand, whether or not a payTo/resources pair has been registered. **Free tier:** 6-hour polling, drop/recovery detection with a durable alert history — no card required. Paid tiers tighten the polling interval and add escalation/rank-drop alert types. Docs & changelog: https://github.com/acjlabs/x402-listing-monitor

Transport

streamable-http

Auth

smithery_api_key

Cost

—

Protocol revision

2025-11-25

negotiated, not declared

MCP readiness

B · 81/100

Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here C+, 70.0/100), which weighs availability, conformance, p95 speed and descriptor. How the two differ

Valid MCP handshake	10/10	initialize and tools/list both answered.
Live MCP endpoint	24/25	Endpoint answers the MCP initialize handshake (2955 ms); slow response -1.
Protocol revision	8/10	Speaks MCP 2025-11-25, 1 revision(s) behind 2026-07-28.
Signed descriptor	n/a	No MCP standard defines a signed server descriptor.
Uptime (30 days)	15/15	30/30 probes succeeded over 30 days (100%).
Tool declaration	5/10	Lists 1 tool(s) with descriptions.
Verified identity	5/10	Publisher declared (repository, package or homepage); claim this listing to verify domain control.
Freshness + modern flags	4/5	seen in a source within 7 days.
Auth declaration	2/5	Declares credential scheme: smithery_api_key.

Applicable criteria total 90 points, scaled to 100.

Responsiveness: Slow (2955 ms; bands ≤2.5 s, ≤5 s, ≤8 s, slower; penalty only).

Measured 2026-11-11.

Nine criteria, the same as the A2A readiness score, read from our daily MCP probe (initialize + tools/list) and 30-day probe history. No MCP standard defines a signed server descriptor, so that criterion is n/a and the other 90 points are scaled to 100. Grades: A>=90, B>=75, C>=60, D>=40, F<40. Display only: search order uses the quality grade.

Compared with peers

Against 53,039 reachable MCP servers in our daily snapshot (2026-11-12 06:46 UTC). Display only; it does not change search order.

Readiness: Higher than 52% of peers; This listing 81 · peer median 81
Latency: Faster than 12% of peers; This listing 819 ms · peer median 326 ms

Where it loses the most points, and how to win them back

Tool declaration −5 — Declare every tool with a description and input schema.
Now: Lists 1 tool(s) with descriptions.
Verified identity −5 — Claim the listing and prove control of its domain.
Now: Publisher declared (repository, package or homepage); claim this listing to verify domain control.
Auth declaration −3 — State how to authenticate (an auth scheme, or that none is needed).
Now: Declares credential scheme: smithery_api_key.

How many agent tools actually work · All statistics

Listed in

Directories this entry was found in.

smithery since 2026-08-02 ↗

How to connect

MCP endpoint (streamable-http)

https://server.smithery.ai/acjlabs/x402-listing-monitor/mcp

JSON-RPC initialize probe

curl -X POST https://server.smithery.ai/acjlabs/x402-listing-monitor/mcp \
  -H 'Content-Type: application/json' \
  -H 'Accept: application/json, text/event-stream' \
  -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{}}'

Homepage

https://acjlabs.com/products

Listed at (smithery)

https://acjlabs.com/products