{"uid":"cap_D7Jayude8YsJO0TD2pJRB","slug":"delx-commerce-evm-base-fee-growth-ceiling-calculator-e15b51c1","name":"Delx Commerce — EVM Base Fee Growth Ceiling Calculator","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-base-fee-growth-ceiling?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"blocks":{"type":"integer","description":"Blocks supplied to EVM Base Fee Growth Ceiling; used only for this bounded calculation and processed in memory without retention."},"growth_fraction":{"type":"number","description":"Growth Fraction supplied to EVM Base Fee Growth Ceiling; used only for this bounded calculation and processed in memory without retention."},"current_base_fee_wei":{"type":"string","maxLength":8192,"description":"Current Base Fee Wei supplied to EVM Base Fee Growth Ceiling; used only for this bounded calculation and processed in memory without retention."}}},"responseSchema":{"type":"json","example":{"result":{"blocks":3,"fee_ceiling_wei":"1423828125"},"schema":"delx/util-evm-base-fee-growth-ceiling/v1","status":"pass","evidence":{"retained":false,"input_sha256":"e6331adf36b1a6016a316e2580f099fd04ebb97045f034d65e705d7114cceb67","external_calls":0},"operation":"evm_preflight:evm_base_fee_growth_ceiling"}},"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_Ts-tam_8Qg4yZmAPGxzAp","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":"Computes the maximum possible EVM base fee after a given number of blocks using the EIP-1559 growth formula, given a current base fee and growth fraction.","exampleAgentPrompt":"Calculate the EVM base fee growth ceiling for 3 blocks, with a current base fee of 1000000000 wei and a growth fraction of 0.125, so I can figure out the worst-case fee before submitting my transaction.","exampleUseCases":[{"title":"Transaction preflight fee budgeting","prompt":"Before I send this Ethereum transaction, calculate the worst-case base fee ceiling after 4 blocks given the current base fee of 2500000000 wei and a growth fraction of 0.125 — I want to make sure my gas budget covers it."},{"title":"Agent-scheduled DeFi transaction safety check","prompt":"My agent is about to execute a DeFi swap in 6 blocks. The current base fee is 800000000 wei and growth fraction is 0.125 — what's the maximum base fee it could face so it can set an appropriate max fee per gas?"},{"title":"Gas spike risk assessment for batch operations","prompt":"I'm planning a batch of 10 EVM transactions over the next 5 blocks. Current base fee is 1500000000 wei with growth fraction 0.125 — can you compute the fee ceiling so I know the worst-case gas cost to budget for?"}],"resultDescription":"Returns a JSON object containing the computed fee_ceiling_wei (the maximum possible base fee in wei after the specified number of blocks), the input block count, a status field ('pass'), an operation identifier, and an evidence object with a SHA-256 hash of the input, a flag confirming no data was retained, and a count of zero external calls made.","failureModes":["Missing or invalid 'blocks' integer — returns error or unexpected result","Invalid 'current_base_fee_wei' string (non-numeric or too large) — may return error","Missing 'growth_fraction' parameter — computation may fail or return incorrect ceiling","Payment failure via x402 protocol — 402 response if USDC payment is not attached","Network timeout — service unavailable response"],"whenToPreferThis":"Use this endpoint when you need a fast, verifiable, pay-per-call computation of the EIP-1559 base fee ceiling with cryptographic evidence of no data retention and no external calls — ideal for EVM transaction preflight checks in autonomous agents that require auditability and no signup overhead.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T04:31:36.123Z","isFirstParty":false,"canonicalSlug":"delx-commerce-evm-base-fee-growth-ceiling-calculator-e15b51c1"}