{"uid":"cap_BRGA_iGp3gJuO5QYIz9oT","slug":"signalharness-abi-encoding-diagnostician-f5e7870f","name":"SignalHarness ABI Encoding Diagnostician","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/abi_encoding_diagnose/invoke","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"abi_diagnostic_request":{"type":"string","maxLength":65536,"minLength":2}}},"responseSchema":{"type":"json","example":{"replay":false,"result":{"warnings":["Diagnostics do not simulate execution or prove contract behavior."],"service_id":"abi_encoding_diagnose","evidence_scope":"caller_supplied_data","abi_encoding_diagnostic":"{\"byte_length\":36,\"decode_valid\":true,\"decoded\":{\"args\":[\"0x0000000000000000000000000000000000000001\"],\"functionName\":\"balanceOf\"},\"has_selector\":true,\"payload_word_aligned\":true,\"selector\":\"0x70a08231\",\"valid_hex\":true}"},"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":"abi_encoding_diagnose","executionId":"example-execution","startedAtMs":0,"amountAtomic":"10000","resultSha256":"4127435eb6889e1d69936bef322d036863abc83b88c31cabbf116e983594c4e4","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_X4qUjer27YXyvMANZyhhw","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 and diagnoses ABI (Application Binary Interface) encoding issues in smart contract data, returning structured warnings and diagnostic findings.","exampleAgentPrompt":"Can you diagnose the ABI encoding issues in this calldata: '0x23b872dd000000000000000000000000...'? I think there's a parameter mismatch with a transferFrom call.","exampleUseCases":[{"title":"Debugging failed contract transaction","prompt":"My Ethereum transaction keeps reverting and I think it's an ABI encoding problem — here's the raw calldata I'm sending to the ERC-20 contract: '0xa9059cbb0000000000000000000000001234...'. Can you diagnose what's wrong with the encoding?"},{"title":"Validating agent-generated contract calldata","prompt":"My agent just generated this ABI-encoded payload for a Uniswap swap call: '0x38ed1739...'. Before I send it on-chain, can you check if the encoding looks correct and flag any warnings?"},{"title":"Learning why a Solidity integration fails","prompt":"I'm integrating with a third-party contract and my ABI-encoded multicall data keeps being rejected. Here's the encoded bytes: '0x252dba42...'. What encoding issues do you see, and what warnings should I be aware of?"}],"resultDescription":"Returns a JSON object containing an ABI encoding diagnostic string describing the issues found, a list of warnings, the evidence scope (indicating the data was caller-supplied), and the service ID. Also includes a full receipt with payment details, execution metadata, network info, and a result SHA-256 hash for verification.","failureModes":["Input string too short (below 2 characters) or too long (above 65536 characters) returns validation error","Malformed or unparseable ABI data may yield empty diagnostics with no warnings","Payment failure on x402 protocol results in 402 response before execution","Network or service timeout returns error status in receipt","Non-ABI-formatted string may produce low-confidence or generic diagnostic output"],"whenToPreferThis":"Choose this endpoint when you need to diagnose or debug ABI encoding problems in EVM smart contract calldata, particularly when a transaction is reverting or a contract call is behaving unexpectedly due to parameter encoding issues. It is especially useful for AI agents that auto-generate contract calls and need to self-verify encoded payloads before submission. Prefer this over general-purpose code analyzers when you specifically need ABI-aware diagnostics with structured warnings and evidence scope.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-16T00:40:38.370Z","isFirstParty":false}