{"uid":"cap_UgpWChDSoexQvmCPuxN7n","slug":"delx-evm-value-plus-fee-budget-54e304b5","name":"Delx EVM Value Plus Fee Budget","description":"EVM Value Plus Fee Budget: EVM Value Plus Fee Budget sums transaction value and fee ceiling for a funding requirement from bounded caller-supplied values without an external provider. Call EVM Value Plus 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 Value Plus Fee Budget as versioned deterministic JSON…","url":"https://api.delx.ai/api/v1/x402/evm-value-plus-fee-budget","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"value_wei":{"type":"string","maxLength":8192,"description":"Value Wei supplied to EVM Value Plus Fee Budget; used only for this bounded calculation and processed in memory without retention."},"fee_ceiling_wei":{"type":"string","maxLength":8192,"description":"Fee Ceiling Wei supplied to EVM Value Plus Fee Budget; used only for this bounded calculation and processed in memory without retention."}}},"responseSchema":{"type":"json","example":{"result":{"value_wei":"50000000000000000","required_wei":"50042000000000000","fee_ceiling_wei":"42000000000000"},"schema":"delx/util-evm-value-plus-fee-budget/v1","status":"pass","evidence":{"retained":false,"input_sha256":"c97960a555f73366664990411512e0dbb6ff9e788f1f8df5e0e28f4eb3bedeb6","external_calls":0},"operation":"evm_preflight:evm_value_plus_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_B4XLuUxuiCdVrrXrByR8t","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 the total Wei required to cover a given transaction value plus a capped fee, for EVM preflight budget checks.","exampleAgentPrompt":"Before submitting my EVM transaction, calculate the total Wei I need if the transaction value is 50000000000000000 Wei and my fee ceiling is 42000000000000 Wei.","exampleUseCases":[{"title":"Preflight budget check before on-chain transfer","prompt":"I'm about to send 0.05 ETH on-chain. Can you calculate the total Wei I need to have in my wallet if my fee ceiling is 42000000000000 Wei and the transfer value is 50000000000000000 Wei?"},{"title":"Agent validates available funds before executing swap","prompt":"Before my agent executes a token swap worth 100000000000000000 Wei, check whether adding a fee ceiling of 80000000000000 Wei gives me a required_wei figure I can compare against my balance."},{"title":"Batch transaction budget planning","prompt":"I'm planning a series of EVM contract calls and need to know the required Wei for each step. First one has a value of 25000000000000000 Wei and a fee ceiling of 21000000000000 Wei — what's the total required?"}],"resultDescription":"Returns a JSON object with the original value_wei, the computed required_wei (value plus fee), and the fee_ceiling_wei used, along with a status of 'pass', the operation name, and an evidence block confirming no data was retained and no external calls were made.","failureModes":["Invalid or non-numeric Wei string causes a validation error","value_wei or fee_ceiling_wei exceeds maxLength of 8192 characters","Missing required fields returns a schema validation error","Extremely large Wei values may cause overflow or precision issues"],"whenToPreferThis":"Use this endpoint when an AI agent needs to perform a preflight EVM budget calculation — specifically to determine the total Wei required for a transaction that includes both a value transfer and a fee cap — before submitting on-chain. It is stateless, runs in memory without data retention, and is purpose-built for autonomous agent workflows that need deterministic, bounded arithmetic on EVM Wei amounts without calling an external node.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T07:14:48.157Z","isFirstParty":false}