{"uid":"cap_SKAtttgIyu7guWnapC6rj","slug":"delx-evm-replacement-fee-bump-checker-67836874","name":"Delx EVM Replacement Fee Bump Checker","description":"Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.","url":"https://commerce.delx.ai/api/v1/x402/evm-replacement-fee-bump?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"new_fee_wei":{"type":"string","maxLength":8192,"description":"New Fee Wei supplied to EVM Replacement Fee Bump; used only for this bounded calculation and processed in memory without retention."},"old_fee_wei":{"type":"string","maxLength":8192,"description":"Old Fee Wei supplied to EVM Replacement Fee Bump; used only for this bounded calculation and processed in memory without retention."},"minimum_bump_fraction":{"type":"number","description":"Minimum Bump Fraction supplied to EVM Replacement Fee Bump; used only for this bounded calculation and processed in memory without retention."}}},"responseSchema":{"type":"json","example":{"result":{"sufficient_bump":true,"proposed_fee_wei":"1125000000","required_fee_wei":"1100000000"},"schema":"delx/util-evm-replacement-fee-bump/v1","status":"pass","evidence":{"retained":false,"input_sha256":"e26aad7e3411d7e56c828277122462cfbb1e33dd33e02d2a4747677195dc32fb","external_calls":0},"operation":"evm_preflight:evm_replacement_fee_bump"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_5bPor_ftzXEMF0YR2aA-I","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calculates whether a proposed EVM transaction replacement fee is sufficient compared to the original fee, given a minimum bump fraction requirement.","exampleAgentPrompt":"Check if a new fee of 1125000000 wei is a sufficient replacement bump over an old fee of 1000000000 wei, using a minimum bump fraction of 0.1.","exampleUseCases":[{"title":"Stuck transaction fee bump check","prompt":"My Ethereum transaction is stuck — the old gas fee was 1000000000 wei and I want to resubmit with 1125000000 wei. Is that enough of a bump if the network requires at least a 10% increase?"},{"title":"DeFi bot replacement fee validation","prompt":"Before I rebroadcast this transaction, verify that my new fee of 2200000000 wei sufficiently replaces the old fee of 2000000000 wei with a minimum bump fraction of 0.12."},{"title":"Agent preflight gas fee check","prompt":"I'm about to replace a pending transaction — old fee is 500000000 wei, new fee is 550000000 wei, minimum bump fraction is 0.1. Tell me if the bump is sufficient and what the required fee actually is."}],"resultDescription":"Returns a JSON object indicating whether the proposed fee represents a sufficient bump (sufficient_bump boolean), along with the proposed fee in wei and the minimum required fee in wei to satisfy the bump fraction. Also includes an evidence block confirming no data retention and an input hash for verifiability.","failureModes":["Missing required fields (new_fee_wei, old_fee_wei, minimum_bump_fraction) result in validation error","Non-numeric or malformed wei strings may cause parsing errors","Negative or zero fee values may produce unexpected computation results","Payment failure via x402 if USDC balance is insufficient"],"whenToPreferThis":"Use this endpoint when an AI agent or DeFi bot needs to programmatically determine whether a replacement EVM transaction fee satisfies the network's minimum bump requirement before broadcasting. Ideal for pre-flight checks in transaction management workflows, particularly when handling stuck or time-sensitive transactions. Prefer over manual calculation when verifiable, auditable results (with input hash and no-retention guarantee) are needed.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T00:53:51.972Z","isFirstParty":false,"canonicalSlug":"delx-evm-replacement-fee-bump-checker-67836874"}