{"uid":"cap_E15RWsOZTKvj_xI_HfcQU","slug":"saylor-innovations-erc-4626-vault-reader-83ccfe22","name":"Saylor Innovations ERC-4626 Vault Reader","description":"ERC-4626 vault reader for 16 EVM chains: underlying asset, total assets, share supply and the current share price in asset units.","url":"https://saylorinnovations.com/api/chain/vault?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["chain","vault"],"properties":{"chain":{"type":"string","description":"chain name (ethereum, base, arbitrum, optimism, polygon, bsc, avalanche, gnosis, linea, scroll, mantle, blast, sonic, celo, berachain, unichain) or chain id"},"vault":{"type":"string","description":"the ERC-4626 vault contract address"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string","const":"json"},"example":{"type":"object","required":["chain","chain_id","vault","asset","total_assets","total_shares","note","source"],"properties":{"name":{"type":["string","null"],"description":"vault name"},"note":{"type":"string","description":"plain-language reading of the result"},"asset":{"type":"string","description":"underlying asset token address"},"chain":{"type":"string","description":"the chain name that was queried"},"vault":{"type":"string","description":"the ERC-4626 vault"},"source":{"type":"string","description":"where the data was read from or how it was computed"},"symbol":{"type":["string","null"],"description":"vault share symbol"},"chain_id":{"type":"number","description":"EIP-155 chain id of that network"},"asset_symbol":{"type":["string","null"],"description":"underlying asset symbol"},"total_assets":{"type":"string","description":"assets managed by the vault, in asset units"},"total_shares":{"type":"string","description":"vault shares in circulation"},"asset_decimals":{"type":["number","null"],"description":"underlying asset decimals"},"share_decimals":{"type":["number","null"],"description":"decimals of the vault share"},"share_price_in_asset":{"type":["number","null"],"description":"asset units one whole share redeems for"}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_8fLpVoC5LP10wO74kND2R","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Reads on-chain ERC-4626 vault data (underlying asset, total assets, share supply, and share price) across 16 EVM-compatible blockchains.","exampleAgentPrompt":"What is the current share price and total assets managed by the ERC-4626 vault at 0xBe53A109B494E5c9f97b9Cd39Fe969BE68BF6204 on Base?","exampleUseCases":[{"title":"Monitor yield vault NAV on Ethereum","prompt":"Check the current share price and total assets for the ERC-4626 vault at 0x83F20F44975D03b1b09e64809B757c47f942BEeA on Ethereum — I want to know what one share redeems for right now."},{"title":"Compare vault share supply across chains","prompt":"Pull the total shares in circulation and the underlying asset for the vault at 0x1BFD67037B42Cf73acF2047067bd4F2C47D9BfD6 on Polygon — I'm tracking its growth week over week."},{"title":"Audit DeFi vault on Arbitrum for portfolio dashboard","prompt":"Fetch the vault name, asset symbol, total assets, and share price for the ERC-4626 vault at 0x724dc807b04555b71ed48a6896b6F41593b8C637 on Arbitrum so I can update my portfolio dashboard."}],"resultDescription":"Returns a JSON object with the chain name, chain ID, vault address, underlying asset address, asset symbol, asset decimals, vault name, vault share symbol, share decimals, total assets under management (in asset units), total shares in circulation, current share price in asset units, a human-readable note summarizing the result, and a source field indicating how the data was retrieved.","failureModes":["Invalid or unsupported chain name/ID returns an error","Vault address is not a valid ERC-4626 contract — call reverts or returns empty data","Contract at address does not implement required ERC-4626 interface methods","Network RPC unavailable for the requested chain — timeout or connection error","Malformed vault address (not a valid Ethereum address) returns validation error"],"whenToPreferThis":"Use this endpoint when you need to read live on-chain state of an ERC-4626 tokenized vault across any of 16 supported EVM chains without setting up your own RPC infrastructure. Ideal for DeFi dashboards, portfolio trackers, yield aggregators, or any agent needing NAV, share price, or AUM data for a specific vault contract. Prefer this over generic blockchain RPC calls when you want a normalized, human-readable response with pre-computed share price and asset metadata.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-27T13:05:42.987Z","isFirstParty":false,"canonicalSlug":"saylor-innovations-erc-4626-vault-reader-83ccfe22"}