{"uid":"cap_0RjQhmTe08QWc55P2fqWU","slug":"delx-evm-blob-fee-budget-29f057fe","name":"Delx EVM Blob Fee Budget","description":"EVM Blob Fee Budget: EVM Blob Fee Budget calculates a worst-case blob fee from blob gas and fee cap from bounded caller-supplied values without an external provider. Call EVM Blob Fee Budget 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 Blob Fee Budget as versioned deterministic JSON. Price: $0.001 USDC via x402…","url":"https://api.delx.ai/api/v1/x402/evm-blob-fee-budget","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"blob_gas":{"type":"integer","description":"Blob Gas supplied to EVM Blob Fee Budget; used only for this bounded calculation and processed in memory without retention."},"max_fee_per_blob_gas_wei":{"type":"string","maxLength":8192,"description":"Max Fee Per Blob Gas Wei supplied to EVM Blob Fee Budget; used only for this bounded calculation and processed in memory without retention."}}},"responseSchema":{"type":"json","example":{"result":{"blob_fee_ceiling_wei":"262144"},"schema":"delx/util-evm-blob-fee-budget/v1","status":"pass","evidence":{"retained":false,"input_sha256":"452aa5227d3b7d47a78b8729ad6d09af441ba3bf8df5aa35b34a7f7e8c38965f","external_calls":0},"operation":"evm_preflight:evm_blob_fee_budget"}},"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_ysawlKSV6_nB8_IF5E0BW","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 total blob fee ceiling in wei given blob gas and max fee per blob gas, enabling EVM preflight cost checks without external calls.","exampleAgentPrompt":"Before I submit my EIP-4844 transaction, calculate the blob fee ceiling in wei assuming blob gas of 131072 and a max fee per blob gas of 2 wei.","exampleUseCases":[{"title":"EIP-4844 transaction preflight cost check","prompt":"I'm about to post a blob transaction with 131072 blob gas and a max fee per blob gas of 1 wei — what's the blob fee ceiling in wei so I know if my budget covers it?"},{"title":"Layer-2 rollup blob submission budgeting","prompt":"My rollup agent is about to submit calldata as blobs. Given blob gas of 262144 and max fee per blob gas of 2 wei, compute the blob fee ceiling in wei so I can decide whether to proceed."},{"title":"Gas cost validation before batch blob post","prompt":"Check the blob fee ceiling for a transaction with blob gas of 65536 and max fee per blob gas of 3 wei — I need to verify it stays under my fee limit before batching the blobs."}],"resultDescription":"Returns a JSON object containing the computed blob_fee_ceiling_wei (the maximum blob fee in wei), along with operation metadata including schema version, status, evidence of no data retention, input hash, and zero external calls made.","failureModes":["Missing or invalid blob_gas integer causes validation error","max_fee_per_blob_gas_wei exceeds maxLength of 8192 characters","Non-numeric string passed for max_fee_per_blob_gas_wei","Integer overflow if extremely large blob_gas or fee values are provided","Malformed JSON body returns 400-level error"],"whenToPreferThis":"Choose this endpoint when an AI agent needs a fast, stateless, auditable computation of the EVM blob fee ceiling in wei before submitting an EIP-4844 blob transaction. It performs no external calls and retains no input data, making it ideal for preflight cost checks in automated blockchain workflows where privacy and determinism matter.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:53:18.942Z","isFirstParty":false}