{"uid":"cap_VxhKLnA4tPrjZUqpxfZOZ","slug":"ethereum-erc-20-total-supply-574722f7","name":"Ethereum ERC-20 Total Supply","description":"ARYSPHERE sells AI-written verdicts on Base token contracts (a grade, a one-liner, a roast and the contract's facts) and Base/Ethereum chain reads, paid per call in USDC on Base over x402 v2. No account and no API key.","url":"https://api.arysphere.com/v1/ventures/x402_eth_reads_v1/eth_mainnet_erc20_totalsupply?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"token":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","description":"ERC-20 contract, 0x + 40 hex"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"ok":true,"chain":"ethereum","method":"totalSupply","result":"88302633055702652","service":"x402_eth_reads_v1.eth_mainnet_erc20_totalsupply"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_VzfJMs6lnWU5ikrQ3LDJQ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the total supply (uint256) of a given ERC-20 token contract on Ethereum mainnet via the totalSupply() call.","exampleAgentPrompt":"What is the total supply of the ERC-20 token at contract address 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on Ethereum mainnet?","exampleUseCases":[{"title":"Check USDC total supply on Ethereum","prompt":"Can you look up the current total supply of USDC on Ethereum mainnet? The contract address is 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48."},{"title":"Monitor token inflation for DeFi protocol","prompt":"I need to track the total supply of the governance token at 0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984 on Ethereum — what is it right now?"},{"title":"Verify token supply before investment","prompt":"Before I invest, can you tell me the total supply of the token at Ethereum contract 0x6B175474E89094C44Da98b954EedeAC495271d0F so I can assess its market cap?"}],"resultDescription":"Returns a JSON object with: `ok` (boolean success flag), `result` (the ERC-20 totalSupply as a decimal uint256 string), `chain` (chain identifier), `service` (endpoint identifier), and `method` (HTTP method used). On failure, includes an `error` field describing the issue.","failureModes":["Invalid or malformed token address (not matching 0x + 40 hex pattern) returns an error response with ok: false","Contract address is not an ERC-20 token (no totalSupply function) results in a revert or error","Network timeout or RPC node unavailability may cause a failed response","Calling with an EOA (externally owned account) address instead of a contract address returns an error","Missing or malformed query parameter returns a validation error"],"whenToPreferThis":"Use this endpoint when you need to read the on-chain ERC-20 totalSupply for a specific token contract on Ethereum mainnet. Prefer this over general-purpose blockchain explorers when you need a lightweight, paid, agent-callable API that returns raw uint256 supply data. It is ideal for DeFi analytics, token monitoring, and market cap calculations where only a contract address is needed.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-17T12:40:49.878Z","isFirstParty":false,"canonicalSlug":"ethereum-erc-20-total-supply-574722f7"}