{"uid":"cap_0rOAhPIYvVR__edjeLAXn","slug":"base-usdc-balance-lookup-47b665f3","name":"Base USDC Balance Lookup","description":"Temporary UTF-8 file handoff, cited HTTPX migration evidence and block-pinned Base USDC balances. See each route for its price, limits and output contract.","url":"https://x402-46-225-191-113.sslip.io/v1/base-usdc-balance?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"address":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$"}}},"responseSchema":{"type":"json","example":{"token":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","status":"ok","symbol":"USDC","address":"0xabababababababababababababababababababab","network":"eip155:8453","read_at":"2026-10-21T18:00:00+00:00","chain_id":8453,"decimals":6,"finality":{"status":"unfinalized","finalized_block_hash":"0x3434343434343434343434343434343434343434343434343434343434343434","at_or_below_finalized":false,"finalized_block_at_observation":90},"block_hash":"0x1212121212121212121212121212121212121212121212121212121212121212","read_calls":6,"rpc_source":"https://example.invalid","consistency":"explicit block number with number/hash/timestamp rechecked after reads","limitations":["Single RPC provider assertion; no independent-node corroboration, ancestry verification or Merkle proof.","A latest-block snapshot can be reorganized or superseded; finality is the provider's observation, not an independent guarantee.","Token quantity only: no USD valuation, transaction history, source-of-funds determination or proof of invoice payment."],"block_number":100,"atomic_amount":"1234567","decimal_amount":"1.234567","block_timestamp":"2026-10-21T18:00:00+00:00"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_rvm9FBnLIRoDC6pSwLMXq","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches the block-pinned USDC token balance for a given Ethereum-compatible address on Base (chain ID 8453)","exampleAgentPrompt":"What's the current USDC balance on Base for the wallet address 0xabababababababababababababababababababab? I need the block-pinned amount and finality status.","exampleUseCases":[{"title":"Pre-payment wallet balance check","prompt":"Before I send an invoice payment, check how much USDC the payer's wallet 0xabababababababababababababababababababab currently holds on Base so I know if they have enough funds."},{"title":"DeFi portfolio balance snapshot","prompt":"Grab the current USDC balance on Base for wallet 0x1234561234561234561234561234561234561234 and tell me the exact decimal amount along with the block number it was read at."},{"title":"Automated treasury monitoring","prompt":"Check the USDC balance on Base for our treasury address 0xdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef and let me know whether the block has been finalized yet."}],"resultDescription":"Returns a JSON object with the USDC token contract address, the wallet's atomic and decimal USDC amounts, the block number and hash at which the read occurred, block timestamp, finality status (including finalized block hash and whether the read block is at or below the finalized block), RPC source URL, consistency method, number of read calls made, and an array of stated limitations about the single-provider nature of the reading and absence of USD valuation or proof-of-payment.","failureModes":["Invalid or malformed address (not matching ^0x[0-9a-fA-F]{40}$) returns a validation error","RPC provider unavailability may cause timeout or 5xx error","Payment of 0.003 USDC not provided via x402 results in 402 Payment Required","Address has no USDC holdings — returns 0 balance with valid block metadata","Block reorganization may make snapshot stale immediately after read"],"whenToPreferThis":"Use this endpoint when you need a block-pinned, on-chain USDC balance reading for a specific wallet on Base (chain ID 8453) with explicit finality metadata. Prefer this over generic blockchain explorers when you need structured JSON output with atomic amounts, block hash, timestamp, and finality status in a single call, especially in automated agent workflows that require verifiable snapshot data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-23T08:15:47.693Z","isFirstParty":false,"canonicalSlug":"base-usdc-balance-lookup-47b665f3"}