{"uid":"cap_KbiDZGT7yeKs-OdyaDC6x","slug":"fastapi-online-token-supply-lookup-4dd6c8a1","name":"fastapi.online — Token Supply Lookup","description":"Chat, embeddings, OCR, speech-to-text, image editing, image understanding (captioning/Q&A), text-to-speech, translation, writing tools, classification tools, developer tools, local utilities, format/checksum validators, encoding & crypto utilities, date/time calculators, geo/coordinate math, math & finance calculators, novelty tools, and business/social writing generators — 179 endpoints in all, across multiple specialized self-hosted models. Pay per call with crypto — no signup — or get an API key.","url":"https://api.fastapi.online/token-supply?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"chain":{"enum":["ethereum","base","polygon","arbitrum","optimism"],"type":"string"},"address":{"type":"string"}}},"responseSchema":null,"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_JWtmRL7PTV05ceRrcNtiC","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":"Returns the total token supply for a given contract address on a specified EVM-compatible blockchain network","exampleAgentPrompt":"What is the total token supply for the contract 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on Ethereum?","exampleUseCases":[{"title":"DeFi token supply audit","prompt":"Can you check the total token supply for the contract 0x6B175474E89094C44Da98b954EedeAC495271d0F on Ethereum? I want to know how many DAI tokens exist."},{"title":"Multi-chain token comparison","prompt":"Look up the token supply for contract address 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174 on Polygon — I'm comparing it against the Ethereum version to see if supply is consistent."},{"title":"Base network token analysis","prompt":"Fetch the total token supply for the contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base so I can calculate the market cap."}],"resultDescription":"Returns the total token supply associated with the given contract address on the specified EVM-compatible chain (ethereum, base, polygon, arbitrum, or optimism), typically as a numeric value representing the on-chain supply figure.","failureModes":["Invalid or non-existent contract address returns an error or zero","Unsupported chain value outside the allowed enum returns a validation error","Contract address not corresponding to a token contract may return zero or an unexpected result","Network timeouts or RPC node issues may cause delayed or failed responses"],"whenToPreferThis":"Use this endpoint when you need a quick, pay-per-call lookup of a token's total supply on a specific EVM chain without setting up your own RPC infrastructure. It supports Ethereum, Base, Polygon, Arbitrum, and Optimism. Prefer this over self-managing RPC calls when you want a simple HTTP API abstraction priced at $0.001 USDC with no signup required.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-19T00:44:55.986Z","isFirstParty":false,"canonicalSlug":"fastapi-online-token-supply-lookup-4dd6c8a1"}