{"uid":"cap_U8T4FobZ9Ev6juLMqVjGl","slug":"ozmium-portfolio-lookup-base-address-token-balances-4de4bf5d","name":"Ozmium Portfolio Lookup – Base Address Token Balances","description":"Every ERC-20 + native ETH a Base address holds (Blockscout-indexed, spam-screened) with confidence-gated USD values: usd is null when no reliable price exists- NEVER a fabricated 0. GET /v1/portfolio/{address}.","url":"https://ozmium.org/v1/portfolio/:address","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"},"pathParams":{"type":"object","properties":{"address":{"type":"string"}}},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"data":{"type":"object","properties":{"tokens":{"type":"array","items":{"type":"object","properties":{"usd":{"type":"number"},"symbol":{"type":"string"},"balance":{"type":"string"}}}},"address":{"type":"string"}}},"network":{"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_7AqEoyTpxf6SHztSvTwN0","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 all ERC-20 and native ETH holdings for a Base address with spam-screened balances and confidence-gated USD values (null when no reliable price exists)","exampleAgentPrompt":"What tokens does the Base wallet 0x3fC91A3afd70395Cd496C647d5a6CC9D4B2b7FAD hold, and what are they worth in USD?","exampleUseCases":null,"resultDescription":"A JSON object containing the queried address, network identifier, and an array of token objects each with a symbol, raw balance string, and a USD value (null if no reliable price is available — never a fabricated zero). Spam tokens are filtered out by the Blockscout indexer before the response is returned.","failureModes":["Invalid or malformed Ethereum address returns a 4xx error","Address has no indexed activity on Base — returns an empty tokens array","No reliable price feed for a token — usd field is null rather than 0","Blockscout indexer lag may cause recently received tokens to be missing","Payment failure (x402) if USDC balance is insufficient — call is not executed"],"whenToPreferThis":"Use this endpoint when you need a complete, spam-filtered snapshot of all ERC-20 and native ETH holdings for a specific Base mainnet address with honest USD valuations. Prefer it over generic blockchain explorers when you need machine-readable output with null-safety on prices (no fabricated zeros) suitable for automated agent workflows on the Base network.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:52:35.666Z","isFirstParty":false}