{"uid":"cap_uikHWa2MTQTgQOpZS4uwI","slug":"200-erc20-balance-reliability-router-e835d069","name":"200 ERC20 Balance Reliability Router","description":"Reliability layer for x402 data providers. Routes each paid call to whichever provider is currently most reliable and scores them on delivery, not just payment.","url":"https://200.surfacedplus.com/route/erc20.balance?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"properties":{}},"type":{"type":"string","const":"http"},"method":{"enum":["POST"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"data":{},"receipt":"uuid - single use, unlocks POST /review","routedTo":"provider-id","latencyMs":0,"failedOver":[],"categoryMerkleRoot":"sha256-hex"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.0036","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":"$0.0036/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0036","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0036","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_5J1QQKqAiFPUv5DzXRW8-","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.0036","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Routes an ERC20 token balance lookup through the most reliable x402 data provider available, with automatic failover and provider scoring","exampleAgentPrompt":"Check the ERC20 token balance for wallet 0xAbc...123 on Ethereum mainnet — route it through whichever provider is most reliable right now and let me know if any failover happened.","exampleUseCases":[{"title":"DeFi portfolio balance monitoring","prompt":"What's the current USDC balance for wallet 0xDeFi...999 on Ethereum? Use the most reliable provider available and show me which one actually answered."},{"title":"Smart contract eligibility check","prompt":"I need to verify whether wallet 0xUser...456 holds at least 100 of token 0xToken...789 on mainnet — check the ERC20 balance and tell me which provider handled the call and how fast it responded."},{"title":"Agent fleet on-chain data reliability","prompt":"My agent needs to pull ERC20 balances frequently and can't afford provider outages — fetch the balance for 0xVault...321 on Ethereum using the highest-reliability route and report any providers that were skipped due to failures."}],"resultDescription":"Returns the ERC20 balance data from the winning provider, the provider ID that served the request, latency in milliseconds, a list of providers that failed over, a category merkle root for auditability, and a single-use receipt UUID that unlocks a POST /review endpoint for rating the provider.","failureModes":["All available providers are down or unreliable — no successful route found","Invalid or malformed wallet/token address in request body — provider rejects query","Payment not accepted or x402 handshake fails — call not processed","Network or timeout error reaching selected provider — partial failover list returned","Malformed JSON body — 400-level error before routing occurs"],"whenToPreferThis":"Choose this endpoint when you need ERC20 balance data and cannot tolerate single-provider downtime — it adds automatic failover, reliability scoring, and an auditable merkle root at a small per-call cost. Prefer it over calling a single RPC or data provider directly when uptime and data delivery quality matter more than minimizing latency overhead.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-19T18:34:59.920Z","isFirstParty":false,"canonicalSlug":"200-erc20-balance-reliability-router-e835d069"}