{"uid":"cap_zVcld8ey5zdUl3gbfneC3","slug":"signalharness-evm-transaction-cost-comparator-3287edc1","name":"SignalHarness EVM Transaction Cost Comparator","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_transaction_cost_compare/invoke","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"transaction_cost_compare_request":{"type":"string","maxLength":65536,"minLength":2}}},"responseSchema":{"type":"json","example":{"replay":false,"result":{"warnings":["Comparison does not forecast future gas prices."],"service_id":"evm_transaction_cost_compare","evidence_scope":"caller_supplied_data","transaction_cost_comparison":"{\"cheapest\":\"a\",\"savings_vs_most_expensive_atomic\":\"420000\",\"scenarios\":[{\"cost_atomic\":\"2100000\",\"name\":\"a\"},{\"cost_atomic\":\"2520000\",\"name\":\"b\"}]}"},"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_transaction_cost_compare","executionId":"example-execution","startedAtMs":0,"amountAtomic":"5000","resultSha256":"e2d19dffc2456df880f9359378119af35d6fbb398e9f7ca639e9ebe96b6eadb0","serviceVersion":"1.0.0","settlementReference":"0x0000000000000000000000000000000000000000000000000000000000000000"},"artifacts":[],"requestId":"example-request","executionId":"example-execution"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_9SYRd43c-Lbi2Ey6V6CQC","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Compares transaction costs across EVM networks or transaction types based on a caller-supplied description or scenario.","exampleAgentPrompt":"Compare the transaction costs for sending 1000 USDC across Ethereum mainnet, Base, Polygon, and Arbitrum — I want to know which network is cheapest right now.","exampleUseCases":[{"title":"L1 vs L2 cost comparison for token transfer","prompt":"Which is cheaper right now for sending 500 USDC — Ethereum mainnet or Base? Give me a cost comparison so I can decide where to execute."},{"title":"Gas fee analysis for smart contract deployment","prompt":"Compare the cost of deploying a standard ERC-20 contract on Ethereum, Arbitrum, and Optimism — I need to know which chain makes the most sense economically."},{"title":"NFT minting fee comparison across EVM chains","prompt":"I'm about to mint 100 NFTs and want to know which EVM network is cheapest — can you compare transaction costs on Polygon, Base, and Ethereum for a batch mint?"}],"resultDescription":"Returns a structured JSON object containing a transaction_cost_comparison string summarizing the comparison, a list of warnings about data limitations or assumptions, the service_id confirming which service ran, and an evidence_scope field indicating the analysis was based on caller-supplied data. Also includes a full receipt with payment metadata, execution timing, and a result hash for verification.","failureModes":["Malformed or empty transaction_cost_compare_request returns a validation error","Request string exceeds 65536 character limit causing rejection","Ambiguous or under-specified request may yield a low-confidence comparison with warnings","Payment failure via x402 protocol results in no execution","Network-specific data unavailable may cause partial results with warnings"],"whenToPreferThis":"Use this endpoint when an AI agent or user needs to compare gas/transaction costs across EVM-compatible blockchains based on a described scenario, and does not have direct on-chain RPC access or a pre-built gas oracle. It is well-suited for advisory, routing, and decision-support workflows where the agent needs to recommend the cheapest chain for a specific operation type. It accepts natural language or structured descriptions, making it accessible without deep blockchain tooling knowledge.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-16T00:54:02.477Z","isFirstParty":false}