{"uid":"cap_NbccyrYAi4jwOD1zW1aM-","slug":"delx-evm-access-list-shape-check-c4be7b79","name":"Delx EVM Access List Shape Check","description":"EVM Access List Shape Check: EVM Access List Shape Check checks bounded EIP-2930 access-list address and storage-key shapes from bounded caller-supplied values without an external provider. Call EVM Access List Shape Check 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 Access List Shape Check as versioned determin…","url":"https://api.delx.ai/api/v1/x402/evm-access-list-shape-check","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"access_list":{"type":"array","items":{"type":"object","maxProperties":128,"additionalProperties":true},"maxItems":256,"description":"Access List supplied to EVM Access List Shape Check; used only for this bounded calculation and processed in memory without retention."}}},"responseSchema":{"type":"json","example":{"result":{"access_list":[{"address":"0x1111111111111111111111111111111111111111","storageKeys":["0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"]}],"shape_valid":true},"schema":"delx/util-evm-access-list-shape-check/v1","status":"pass","evidence":{"retained":false,"input_sha256":"c95fc9bc68ce73ff8a8fe469781d27e5342ca1ef3899ec2614304bc60ab0eff2","external_calls":0},"operation":"evm_preflight:evm_access_list_shape_check"}},"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_pCg2tvibJn_mKnDp2N8Ko","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":"Validates the structural shape of an EVM transaction access list (EIP-2930), confirming addresses and storage keys conform to the expected format.","exampleAgentPrompt":"Before I submit this Ethereum transaction, can you check whether my access list is correctly shaped — here it is: [{\"address\":\"0x1111111111111111111111111111111111111111\",\"storageKeys\":[\"0xaaaa...\"]}]?","exampleUseCases":[{"title":"Transaction preflight before broadcast","prompt":"I'm about to send an EIP-2930 transaction — can you validate that this access list has the right shape before I broadcast it? Here's the list: [{\"address\":\"0xAbCd...\",\"storageKeys\":[\"0x0001...\"]}]"},{"title":"Smart contract interaction debugging","prompt":"My transaction keeps failing and I think the access list might be malformed. Can you run a shape check on this access list and tell me if the addresses and storage keys are correctly structured?"},{"title":"Automated agent preflight pipeline","prompt":"As part of building my transaction, automatically validate the access list shape for [{\"address\":\"0xDEAD...\",\"storageKeys\":[\"0xbeef...\"]}] so I know it's safe to proceed to the signing step."}],"resultDescription":"Returns a JSON object indicating whether the access list is structurally valid (shape_valid: true/false), the normalized access list, a status string ('pass' or 'fail'), and an evidence block confirming no data is retained, zero external calls were made, and an input SHA-256 hash for auditability.","failureModes":["Malformed access list entries (e.g. missing address or storageKeys fields) result in shape_valid: false","Access list exceeds 256 items causing a 400-level rejection","Individual objects with more than 128 properties are rejected","Invalid JSON structure in the access_list array causes a parse error","Non-hex or wrong-length address strings may fail shape validation"],"whenToPreferThis":"Choose this endpoint when you need a fast, stateless, privacy-preserving structural check on an EVM EIP-2930 access list before submitting a transaction. It is ideal for agent-driven transaction pipelines that need a cheap ($0.001 USDC) preflight gate to catch malformed access lists early, avoiding expensive on-chain reverts. Prefer it over full transaction simulation when you only need structural/shape validation, not execution outcome prediction.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T07:14:46.673Z","isFirstParty":false}