{"uid":"cap_ZUyfP_ZkPV_CBy7B2wjRd","slug":"fhi-mcp-security-monitoring-change-evidence-36135136","name":"FHI MCP Security Monitoring – Change Evidence","description":"Stateful remote-MCP change evidence, payable per call with x402 Base USDC.","url":"https://polished-truth-c514.fhi-llc-1118.workers.dev/api/v1/mcp-change-evidence?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"serverUrl":{"type":"string","format":"uri","description":"Public HTTPS streamable-HTTP MCP endpoint"}}},"responseSchema":{"type":"json","example":{"changed":true,"changes":{"addedTools":["send_email"],"changedTools":[{"name":"search","fields":["description"]}],"removedTools":[],"riskScoreDelta":18},"current":{"score":54,"verdict":"CAUTION"},"endpoint":"https://example.com/mcp","monitoring":{"state":"change_detected","signals":["tool_added","tool_description_changed"]},"firstObservation":false}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_wujVpnANBrXV7fzfZvMBG","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Detects and reports changes to a remote MCP endpoint's tools and capabilities, returning a risk score delta and change evidence with stateful tracking across calls.","exampleAgentPrompt":"Check whether the MCP server at https://example.com/mcp has changed since you last scanned it — I want to know if any tools were added, removed, or had their descriptions modified, and what the current risk score is.","exampleUseCases":[{"title":"Detecting unexpected tool additions on a production MCP server","prompt":"Has the MCP server at https://myprod-agent.example.com/mcp had any tools added or removed since the last scan? Flag anything that looks risky."},{"title":"Auditing a third-party MCP endpoint before connecting an agent","prompt":"Before I let my agent connect to https://partner-tools.acme.io/mcp, can you check if it has changed recently and give me a risk verdict on its current tool set?"},{"title":"Ongoing prompt-injection monitoring for an agent fleet","prompt":"Run a change-evidence check on https://internal-tools.mycompany.com/mcp and tell me if any tool descriptions were modified — I'm worried about prompt injection slipping in through description changes."}],"resultDescription":"Returns a JSON object indicating whether the MCP endpoint changed since last observation, listing added/changed/removed tools, a risk score delta, the current aggregate risk score with a verdict (e.g. CAUTION), the monitoring state (e.g. change_detected), specific change signals, and whether this is the first observation for this endpoint.","failureModes":["Invalid or unreachable MCP server URL returns an error without change data","First-time observations set firstObservation=true with no delta, since there is no prior state to compare","Payment failure via x402 blocks the call entirely","Private or firewall-protected endpoints may time out or return access errors","Endpoints returning non-standard MCP schemas may produce incomplete change detection"],"whenToPreferThis":"Choose this endpoint when you need stateful, per-call change detection for remote MCP servers — especially when monitoring for security regressions like unauthorized tool additions, tool description mutations (potential prompt injection vectors), or unexpected capability removals. It combines change diffing with risk scoring in a single call, making it ideal for agentic security pipelines that need to validate third-party or internal MCP endpoints before use or on a recurring basis.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T21:35:41.071Z","isFirstParty":false,"canonicalSlug":"fhi-mcp-security-monitoring-change-evidence-36135136"}