{"uid":"cap_n0Oc1u9t4A6bv57SidS1G","slug":"hermes-x402-toolkit-base-chain-address-lookup-8f8b37dd","name":"Hermes x402 Toolkit – Base Chain Address Lookup","description":"Pay-per-call data API for AI agents. No API key, no account, no signup — pay USDC on Base (eip155:8453) per request; free /api/meta lists all 22 endpoints. One call each: web page to LLM-ready text and link previews; China A-share quotes and limit-up pool; Chinese text and pinyin; Base/Ethereum on-chain reads (address, token, ERC-20 balances, tx, blocks, transfer history, gas price in USD); NFT records (collection, owner, and ipfs:// tokenURI resolved through public gateways); full-page screenshots; email verification without sending mail; ENS forward/reverse resolution; smart-contract due diligence (ABI, verified source, proxy); token security facts (owner, renounced ownership, paused, bytecode capability selectors); domain dossier (RDAP, DNS, TLS certificate, HTTP facts, hosting network).","url":"https://api.zlovev.com/api/chain/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"},"queryParams":{"type":"object","required":["address"],"properties":{"address":{"type":"string","description":"0x-prefixed 20-byte address on Base mainnet"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"ok":true,"block":51396188,"nonce":1,"address":"0x8335…2913","eth_balance":"12.5","is_contract":true,"usdc_balance":"1000.5"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_kJt-Fzv4h-7BdncaUR7jg","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns on-chain data for a Base mainnet address including ETH balance, USDC balance, nonce, contract status, and block height — paid per call via x402/USDC.","exampleAgentPrompt":"Can you look up the on-chain details for Base mainnet address 0x8335...2913 — I want to know its ETH balance, USDC balance, and whether it's a smart contract?","exampleUseCases":[{"title":"DeFi wallet balance check","prompt":"What's the current ETH and USDC balance for 0xAbCd1234...5678 on Base mainnet, and is it a contract or a regular wallet?"},{"title":"Agent treasury monitoring","prompt":"Check the on-chain state of our agent's treasury address 0xDEAD...BEEF on Base — I need the ETH balance, USDC balance, and the latest block number it was checked against."},{"title":"Contract vs EOA verification","prompt":"Can you tell me if 0x1234...abcd on Base is a smart contract or an externally owned account, and what its current nonce is?"}],"resultDescription":"Returns a JSON object with: ok (boolean success flag), block (latest block number at query time), nonce (transaction count), address (queried address), eth_balance (ETH balance as a string), is_contract (boolean), and usdc_balance (USDC balance as a string).","failureModes":["Invalid or malformed address (not a valid 0x-prefixed 20-byte hex) returns an error","Address not found or zero-activity address may return zero balances","Payment failure via x402 results in 402 response before data is returned","Network congestion on Base may cause delayed or stale block data","Non-Base mainnet addresses queried against Base RPC may return unexpected zero results"],"whenToPreferThis":"Choose this endpoint when you need quick, no-signup on-chain lookups for Base mainnet addresses, especially in agent workflows where API key management is impractical and micropayment-per-call via x402/USDC is acceptable. Prefer it over general Ethereum RPC calls when you want a clean JSON response without raw RPC boilerplate.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-19T06:41:27.410Z","isFirstParty":false}