{"uid":"cap_PJSBEduqPiRB0PlT7WRSa","slug":"signalharness-evm-block-analyzer-5c000fd8","name":"SignalHarness EVM Block Analyzer","description":"Explore 330 pay-per-call x402 API services and 27 agent-native digital products, with Base USDC pricing, secure Polar checkout, and free discovery.","url":"https://signalharness.ai/api/agent/services/evm_block_analyze/invoke","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"evm_block_request":{"type":"string","maxLength":65536,"minLength":2}}},"responseSchema":{"type":"json","example":{"replay":false,"result":{"warnings":["The supplied block is not independently validated or fetched."],"service_id":"evm_block_analyze","block_analysis":"{\"gas_limit\":\"30000000\",\"gas_used\":\"21000\",\"gas_utilization\":\"0.07\",\"hash\":\"0xbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb\",\"number\":\"100\",\"parent_hash\":\"0xcccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc\",\"total_value_atomic\":\"10\",\"transaction_count\":1}","evidence_scope":"caller_supplied_data"},"status":"succeeded","receipt":{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","usage":[],"status":"succeeded","network":"eip155:8453","artifacts":[],"endedAtMs":0,"latencyMs":0,"paymentId":"example-payment","receiptId":"example-receipt","requestId":"example-request","serviceId":"evm_block_analyze","executionId":"example-execution","startedAtMs":0,"amountAtomic":"10000","resultSha256":"cfe50c9e1bd0310bcdd46b8cd335a0bf2f47466df90ab16977751bca1f7bc887","serviceVersion":"1.0.0","settlementReference":"0x0000000000000000000000000000000000000000000000000000000000000000"},"artifacts":[],"requestId":"example-request","executionId":"example-execution"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/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_MbrLOilX8IcTtjIb4KbuV","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Analyzes a supplied EVM block (or block-related data) and returns a structured analysis with warnings and evidence scope","exampleAgentPrompt":"Can you analyze this EVM block data for me and flag any warnings or anomalies? Here's the raw block payload: [block JSON or identifier]. I want a structured breakdown of what happened in that block.","exampleUseCases":[{"title":"Detect suspicious block activity","prompt":"I've got an EVM block that I think might contain a sandwich attack — can you run it through the block analyzer and tell me what warnings or red flags show up?"},{"title":"Audit a Base chain block","prompt":"Can you analyze block 19500000 data from the Base network and give me a full breakdown of what transactions and activity it contains, plus any anomalies?"},{"title":"Validate block data before processing","prompt":"Before my pipeline processes this EVM block payload, can you run an analysis on it and tell me if there are any warnings or evidence-scope issues I should know about?"}],"resultDescription":"Returns a JSON object with a block_analysis narrative, a list of warnings (strings), an evidence_scope field indicating the data provenance (e.g. 'caller_supplied_data'), a status field ('succeeded'), and a signed receipt containing payment details, latency, a SHA-256 result hash, and execution metadata.","failureModes":["Invalid or malformed evm_block_request string returns an error","Block data exceeding 65536 characters will be rejected","Payment failure or insufficient USDC balance prevents execution","Ambiguous or incomplete block data may result in low-confidence analysis with broad warnings","Network issues may cause timeout with no result"],"whenToPreferThis":"Choose this endpoint when you need AI-powered semantic analysis of EVM block data — particularly for detecting anomalies, extracting structured insights, or auditing on-chain activity at the block level. Prefer it over raw RPC calls when you want interpreted results with warnings rather than raw block JSON. Suitable for agents that need to reason about block contents without implementing their own parsing logic.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T13:06:55.713Z","isFirstParty":false}