{"uid":"cap_pyN1CtEPBY6hMqxsQ0rX6","slug":"phantom-api-avalanche-token-balances-e5927d98","name":"Phantom API – Avalanche Token Balances","description":"Lightning-fast access to blockchain data, smart contract insights, and Web3 infrastructure across 57+ networks. Pay-per-call via x402.","url":"https://phantom-api-omega.vercel.app/api/avalanche/token/balances","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"owner":{"type":"string"},"contractAddresses":{"type":"array","items":{"type":"string"}}}},"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_zYOYR32NOF_SyKDi5avwh","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":"Fetches ERC-20 and native token balances for a given wallet address on the Avalanche network, optionally filtered by contract addresses.","exampleAgentPrompt":"Can you check what ERC-20 tokens the Avalanche wallet 0x742d35Cc6634C0532925a3b8D4C9b5e9F1A2b3c4 is holding? Filter by these contract addresses: 0xB31f66AA3C1e785363F0875A1B74E27b85FD66c7 and 0x60781C2586D68229fde47564546784ab3fACA982.","exampleUseCases":[{"title":"DeFi portfolio audit on Avalanche","prompt":"What tokens does the Avalanche wallet 0x742d35Cc6634C0532925a3b8D4C9b5e9F1A2b3c4 currently hold? I want to see all token balances across every contract it interacts with."},{"title":"Specific token holding check","prompt":"Check if the Avalanche address 0xAbC123...def456 has any balance in the WAVAX token at contract 0xB31f66AA3C1e785363F0875A1B74E27b85FD66c7."},{"title":"On-chain due diligence for a counterparty","prompt":"Before I transfer funds, can you verify what tokens and how much the Avalanche wallet 0x9f8F72aA9304c8B593d555F12eF6589cC3A579A2 is holding so I can assess their on-chain activity?"}],"resultDescription":"Returns a list of token balances for the specified Avalanche wallet, including token contract addresses, token symbols, decimals, and balance amounts. If contract addresses are provided, results are filtered to only those tokens.","failureModes":["Invalid wallet address format returns a validation error","Unknown or unindexed contract addresses may return zero balances or be omitted","Rate limiting or payment failure via x402 results in a 402 Payment Required response","Network downtime on Avalanche indexing may return stale or unavailable data","Malformed request body (missing owner field) results in a 400 Bad Request"],"whenToPreferThis":"Choose this endpoint when you need fast, pay-per-call token balance lookups specifically on the Avalanche network without managing your own RPC nodes or indexer infrastructure. It is ideal for agents that need real-time wallet portfolio data on AVAX without a subscription or API key commitment, paying only $0.01 USDC per call via x402.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T13:05:35.471Z","isFirstParty":false}