{"uid":"cap_WHCxpB_Kfgyw0mLyzf-7w","slug":"agent-watch-probe-be70416a","name":"Agent Watch Probe","description":"Probe an MCP/agent endpoint: liveness, latency, tool count, auth metadata, price-challenge detection. Real MCP initialize handshake, not a ping.","url":"https://aiagentscity.com/api/x402/agent-watch/probe?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["method"]},"output":{"type":"object"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_OLajV7BhxkH75wH1Fa-7p","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Performs a real MCP initialize handshake against an agent/MCP endpoint to check liveness, measure latency, count tools, and detect auth requirements and price challenges.","exampleAgentPrompt":"Can you probe the MCP endpoint at https://myagent.example.com/mcp and tell me if it's alive, how fast it responds, how many tools it exposes, and whether it requires auth or a payment challenge?","exampleUseCases":[{"title":"Verify new MCP server deployment","prompt":"I just deployed my MCP server at https://staging.myapp.com/mcp — can you do a real handshake probe and confirm it's live, check the latency, and tell me how many tools it's advertising?"},{"title":"Audit agent marketplace listing","prompt":"Before I integrate this third-party agent at https://partner-agent.io/mcp, can you probe it to check if it's actually alive, how slow it is, and whether it throws up a price challenge or needs special auth?"},{"title":"Monitor agent endpoint health","prompt":"Run a live health check on our production agent endpoint https://prod.myfleet.com/mcp-server and report back liveness, round-trip latency, and any auth or x402 payment gates it's enforcing right now."}],"resultDescription":"Returns liveness status (alive/dead), measured round-trip latency, number of tools advertised by the endpoint, authentication metadata, and whether the endpoint issued a price-challenge (x402 payment required response) — all derived from a real MCP initialize handshake, not a simple ping.","failureModes":["Endpoint unreachable or DNS failure — returns dead/liveness=false with timeout details","Endpoint responds but does not speak MCP protocol — handshake fails with protocol error","Price challenge issued unexpectedly — may block probe completion and returns challenge metadata","Auth token required to complete handshake — probe returns partial metadata with auth requirement flag","High latency endpoints may timeout before handshake completes"],"whenToPreferThis":"Use this endpoint when you need a definitive liveness and capability snapshot of an MCP or AI agent endpoint using a real protocol handshake rather than a simple HTTP ping. It is the right choice when you need to know tool count, auth requirements, or x402 price-challenge behavior — not just whether a TCP port is open.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-22T06:37:58.121Z","isFirstParty":false,"canonicalSlug":"agent-watch-probe-be70416a"}