io.github.probe402/probe402-check

probe402-check

Is the probe402-check MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-27.

Ask probe402's public record about an x402 or MPP endpoint before an agent pays it.

alive probed 2026-11-14 · unchanged since 2026-10-27

1tools

606tokens in Claude Opus 5.5

0.3 %of Claude's 200k window

0.2×the median server

317 msto initialize

9 msto list tools

Run it: npx -y probe402-check@0.2.1 (stdio, probed in a container with the network off)
Host: npmjs.com
Reports itself as: probe402-check 0.2.1
Capabilities: tools
Instructions: none
Of a 1M window: <0.1 % of a 1M context window
Count: 606 tokens in Claude Opus 5.5, exact, measured 2026-10-27. With the Claude Code prefix mcp__…__ on each tool name: 616. The o200k_base estimate is 389. Counted again when the tool definitions change. Method.
Repository: https://github.com/probe402/probe402-check
Website: https://probe402.com/method
Registry: active, updated 2026-10-01 · registry entry
Changes: 2 recorded, reachable in 2 of them. A row is added when the result, the tool count or the cost changes.

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.56×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
check_before_paying	606	389	100 %

Other registry entries on npmjs.com, the ones next to this name; all of them.

jsonloupe io.github.priyanshuN/jsonloupe · alive
io.github.proars/ghost-mcp-server · needs env
Livespace CRM MCP Server io.github.proAutomator/livespace-crm-mcp · not probed
Probarion io.github.probarion/probarion · needs env
prodlint io.github.prodlint/prodlint · alive
io.github.productmap/namecatcher-skills · alive
io.github.productstein/holomime · crashed on start
AgentSecurityLens MCP Security Trust Check io.github.professor2k8/agent-security-lens · alive

Servers that mention probe402 or check.

probe402 com.probe402/endpoint-history · alive
Business Contact Finder agency.ottobot/business-contact-finder · alive
groTAX by Grovisor ae.grovisor/grotax · alive
Agentic Fabrication Network (AFN) ai.agenticfabricationnetwork/ufp · alive
Plumbline - Contractor License Checks ai.agentlookups/plumbline · alive
ai.agentlookups/overassessed · alive
Alpic ai.alpic.mcp/alpic-mcp · needs auth
One-Page Readiness Check — 10 Signals, Arabic or English ai.advisorsai/store-readiness · alive

We add a row when the result changes. A server with no change keeps its last row.

Probed	Result	Init	Tools	Claude	o200k
2026-10-27 06:58	alive	308 ms	1	606	389
2026-10-20 06:44	alive	317 ms	1		389

The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.

Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.