{"uid":"cap_DHrQzAvzvVR3P0BU1whjk","slug":"x402-toolbox-chain-storage-slot-reader-92ec5c37","name":"x402-toolbox Chain Storage Slot Reader","description":"309 deterministic pay-per-call tools for AI agents over x402 (USDC, Base). No signup, no API key: the payment is the identity.","url":"https://x402-toolbox.shablony-pro.workers.dev/chain/storage-slot?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"schema":{"type":"string"}}},"responseSchema":{"type":"json","example":{"ok":true,"paid":true}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_K4tqkKPFxpP62oP0LLA3M","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Reads a specific storage slot value from a blockchain smart contract using the x402 pay-per-call model with USDC on Base.","exampleAgentPrompt":"Can you read the value stored at EVM storage slot 0x0 for my smart contract — use the x402 pay-per-call toolbox so I don't need to set up an API key?","exampleUseCases":[{"title":"Inspect contract owner storage slot","prompt":"I want to check who owns this smart contract — can you read storage slot 0x0 from the contract to find the owner address? Use the pay-per-call chain storage slot tool."},{"title":"Debug unexpected contract state","prompt":"My smart contract is behaving oddly and I think slot 2 has an unexpected value. Can you fetch the raw storage slot 2 contents so I can debug what's stored there on-chain?"},{"title":"Verify upgrade proxy implementation slot","prompt":"Can you read the EIP-1967 implementation slot (0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc) from my proxy contract to confirm which implementation address is currently set?"}],"resultDescription":"Returns a JSON object with an 'ok' boolean indicating success and a 'paid' boolean confirming payment was processed, along with the raw storage slot value retrieved from the blockchain.","failureModes":["Invalid or malformed storage slot schema returns an error response","Payment failure if insufficient USDC balance on Base results in 402 response","Non-existent or inaccessible contract address returns empty or zero value","Network congestion on Base may cause timeout or delayed response","Malformed schema input may yield unexpected ok:false response"],"whenToPreferThis":"Choose this endpoint when you need quick, no-signup, no-API-key access to raw EVM contract storage slot data on Base chain and are comfortable paying $0.002 USDC per call via the x402 protocol. Ideal for AI agents that need deterministic, programmatic blockchain state inspection without OAuth or key management overhead.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T06:49:39.627Z","isFirstParty":false,"canonicalSlug":"x402-toolbox-chain-storage-slot-reader-92ec5c37"}