{"uid":"cap_8JP6x7AX-iKW8zAkm5Lz7","slug":"synapse-api-opbnb-token-balances-d9a4d2a9","name":"Synapse API — opBNB Token Balances","description":"High-speed API suite for AI processing, web scraping, and smart data utilities across 57+ blockchain networks. Pay-per-call via x402.","url":"https://synapse-api-brown.vercel.app/api/opbnb/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_QmTbTSLBCrmO8uV3wjBS0","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":"Retrieves token balances for a given wallet address on the opBNB blockchain network, optionally filtered by specific contract addresses.","exampleAgentPrompt":"What are all the token balances for wallet 0xABC123...def on opBNB? Also check the balances for these two contracts: 0xToken1... and 0xToken2....","exampleUseCases":[{"title":"DeFi portfolio balance check","prompt":"Show me all token balances for my wallet 0x1234abcd...5678 on the opBNB network so I can see my current holdings."},{"title":"Specific token holding verification","prompt":"Check whether wallet 0xDEAD...BEEF holds any tokens for these contracts on opBNB: 0xContractA... and 0xContractB...."},{"title":"Automated wallet monitoring","prompt":"Every hour, pull the token balances for wallet 0xMonitor...0001 on opBNB and alert me if anything changes significantly."}],"resultDescription":"Returns a list of token balances associated with the given wallet address on the opBNB network, including token contract addresses and their corresponding balance amounts. If specific contract addresses are provided, results are filtered to those tokens only.","failureModes":["Invalid or malformed wallet address returns an error or empty result","Contract address array contains invalid addresses causing partial or failed lookups","opBNB network outage or RPC unavailability causing timeout","Wallet address with no token holdings returns empty balance list","Rate limiting or payment failure via x402 protocol returning 402 status"],"whenToPreferThis":"Use this endpoint when you need to query token balances specifically on the opBNB (Optimistic BNB) Layer 2 network. Prefer this over generic multi-chain balance endpoints when your use case is opBNB-specific and you want pay-per-call pricing without subscription overhead.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T19:00:49.565Z","isFirstParty":false}