{"uid":"cap_iJiul7o7CmDa0qJAO-2Ab","slug":"base-event-log-monitor-ad74dffe","name":"Base Event Log Monitor","description":"Machine-payable service intelligence for discovering, verifying, and monitoring identity, risk, authorization, execution-preflight, and evidence APIs before autonomous agents spend.","url":"https://base-agent-preflight.bytoken2023.workers.dev/v1/x402/base/event-log-monitor","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["address","from_block"],"properties":{"address":{"type":"string","pattern":"^0x[a-fA-F0-9]{40}$","description":"Base address whose emitted logs should be monitored."},"from_block":{"type":"string","pattern":"^[0-9]+$","description":"Return logs from this Base block onward."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"network":{"type":"string"},"product":{"type":"string"},"activity":{"type":"object"},"identity":{"type":"object"},"assessment":{"type":"object"},"provenance":{"type":"object"}}}}}}},"responseSchema":{"type":"json","example":{"network":"eip155:8453","product":"base-event-log-monitor","assessment":{"flags":[],"risk_level":"low","risk_score":0}}},"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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_iOfTbUdJ2k-dCJeIgEkAk","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Monitors and retrieves emitted event logs from a given Base (EVM) address starting from a specified block, with risk scoring and flag assessment.","exampleAgentPrompt":"Can you pull all event logs emitted by Base address 0xAbCd1234567890abcdef1234567890abcdef1234 starting from block 12000000 and tell me if there are any risk flags?","exampleUseCases":null,"resultDescription":"Returns a JSON object with the Base network identifier (eip155:8453), product name, an activity object with event logs, an identity object, an assessment object containing a list of flags, a risk_level (e.g. 'low'), and a numeric risk_score — plus provenance metadata.","failureModes":["Invalid address format (not matching ^0x[a-fA-F0-9]{40}$) returns a validation error","Non-numeric or missing from_block returns a schema validation error","Address with no logs in the specified block range returns empty activity with low risk","Block number in the future or beyond chain head may return no results or an error","Payment failure (insufficient USDC or x402 auth issue) results in a 402 response"],"whenToPreferThis":"Use this endpoint when you need to monitor, retrieve, and risk-assess event logs emitted by a specific Base network address from a given block onward. Prefer this over generic RPC calls when you also want automated risk scoring and flag detection bundled with log retrieval, especially in autonomous agent workflows that need to react to on-chain events on Base (EIP-155:8453).","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:42:17.745Z","isFirstParty":false}