{"uid":"cap_ViOs-_zF6K51ii6QnYsdD","slug":"delx-evm-replacement-fee-bump-f22e82ba","name":"Delx EVM Replacement Fee Bump","description":"EVM Replacement Fee Bump: EVM Replacement Fee Bump checks proposed fee caps against a required replacement bump from bounded caller-supplied values without an external provider. Call EVM Replacement Fee Bump before signing, submitting, replacing, or accepting an EVM/Base transaction assembled from caller-owned data. Returns normalized transaction evidence, calculated budget or shape findings, and a fail-closed preflight status for EVM Replacement Fee Bump as versioned deterministic JSON. Price:…","url":"https://api.delx.ai/api/v1/x402/evm-replacement-fee-bump","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_Wf-q7QpzLN7gaCTVGLZz0","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":"Checks whether a new EVM transaction fee (in wei) represents a sufficient bump over the old fee, given a minimum bump fraction threshold.","exampleAgentPrompt":"Check if bumping a stuck transaction from 1000000000 wei to 1125000000 wei satisfies a minimum bump fraction of 0.1 for EVM fee replacement.","exampleUseCases":[{"title":"Stuck transaction fee replacement check","prompt":"I have a pending Ethereum transaction with an old fee of 1000000000 wei and I want to replace it with 1125000000 wei — does that meet a minimum bump fraction of 0.1?"},{"title":"RBF preflight before rebroadcast","prompt":"Before I rebroadcast my transaction, verify whether raising the fee from 900000000 wei to 1000000000 wei is sufficient given a 0.12 minimum bump fraction."},{"title":"Automated gas bumping agent validation","prompt":"My agent is trying to speed up a stuck transaction — old fee is 2000000000 wei, proposed new fee is 2200000000 wei, minimum bump fraction is 0.1. Is the bump large enough to qualify as a replacement?"}],"resultDescription":"Returns a JSON object indicating whether the proposed fee bump is sufficient (sufficient_bump boolean), the proposed fee in wei, and the minimum required fee in wei to satisfy the bump fraction. Also includes audit evidence: input hash, retention status, and external call count.","failureModes":["Missing required fields (new_fee_wei, old_fee_wei, or minimum_bump_fraction) may cause a 400 error","Non-numeric or non-string wei values may cause parsing errors","minimum_bump_fraction of 0 or negative values may produce unexpected results","Extremely large wei strings beyond practical EVM values may be rejected"],"whenToPreferThis":"Use this endpoint when an AI agent needs to programmatically verify that a replacement EVM transaction fee satisfies the network's replace-by-fee (RBF) minimum bump requirement before rebroadcasting. It is purpose-built for EVM fee bump preflight checks and returns structured, auditable results with no data retention — ideal for automated blockchain transaction management workflows.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T19:07:26.908Z","isFirstParty":false}