{"uid":"cap_7njd4Ukb-dwnCo62tm5Kl","slug":"signalharness-abi-selector-collision-detector-a95cefc6","name":"SignalHarness ABI Selector Collision Detector","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_selector_collisions/invoke","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"abi_collision_request":{"type":"string","maxLength":65536,"minLength":2}}},"responseSchema":{"type":"json","example":{"replay":false,"result":{"warnings":["Only supplied ABI entries are evaluated."],"service_id":"abi_selector_collisions","evidence_scope":"caller_supplied_data","selector_collisions":"{\"collisions\":[],\"selector_count\":1}"},"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_selector_collisions","executionId":"example-execution","startedAtMs":0,"amountAtomic":"10000","resultSha256":"3cb10511292ec2f84ccbf049ef7dd411c3867c66f4ce6f5838d7c7c16d3f3608","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_TL9qq4GZFdbW9c3MgVOR9","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":"Detects and reports 4-byte function selector collisions within a supplied Ethereum ABI definition","exampleAgentPrompt":"Check this Ethereum ABI for any 4-byte function selector collisions and list any conflicts you find: [paste ABI JSON here].","exampleUseCases":[{"title":"Pre-deployment contract security audit","prompt":"Before I deploy this smart contract, can you check the ABI for any selector collisions that could cause unexpected function routing? Here's the ABI: [{\"type\":\"function\",\"name\":\"transfer\",\"inputs\":[{\"type\":\"address\"},{\"type\":\"uint256\"}]}]"},{"title":"Proxy contract upgrade collision check","prompt":"I'm upgrading a proxy contract and want to make sure there are no selector collisions between the old and new implementation ABI. Can you scan this combined ABI for any conflicts?"},{"title":"Multi-interface collision detection","prompt":"I have a Solidity contract that implements multiple interfaces and I'm worried about selector clashes between them — can you analyze this ABI and tell me if any function selectors collide?"}],"resultDescription":"Returns a JSON object containing a list of detected selector collisions (selector_collisions), any warnings, an evidence_scope field indicating the data was caller-supplied, and a service_id confirming the service used. Also includes a full receipt with payment details, latency metrics, and a SHA-256 hash of the result for verification.","failureModes":["Invalid or malformed ABI JSON input returns an error","ABI string exceeds 65536 character limit causing rejection","Empty or too-short input (under 2 characters) fails validation","Payment failure prevents execution","Ambiguous or non-standard ABI formats may produce incomplete collision detection"],"whenToPreferThis":"Choose this endpoint when you need automated, programmatic detection of Ethereum ABI function selector collisions as part of a smart contract audit, deployment pipeline, or security workflow. It is ideal for agents building contract validation flows where the ABI is available as a string. Prefer this over manual selector computation when dealing with large or complex ABIs with many functions.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T19:01:50.548Z","isFirstParty":false}