{"uid":"cap_VM5CtR2SUfTPNeOwHzT27","slug":"hermes-x402-toolkit-base-chain-gas-price-lookup-31f69102","name":"Hermes x402 Toolkit – Base Chain Gas Price 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/gas","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","properties":{"gas_limits":{"type":"string","description":"Comma-separated gas units to price (max 8, each 21000-5000000)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"ok":true,"block":51389007,"costs":[{"gas":21000,"usd":0.0003}],"eth_usd":2394.84,"gas_price_wei":6000000}},"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_yRRvOzUd9UJ79hwp4_luW","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 current Base (EVM) network gas prices and USD cost estimates for specified gas amounts, using live ETH/USD pricing.","exampleAgentPrompt":"What would a standard ETH transfer (21000 gas) and a typical ERC-20 transfer (65000 gas) cost right now in USD on Base? Check current gas prices for both.","exampleUseCases":[{"title":"Pre-flight gas check for DeFi agent","prompt":"Before I submit this swap transaction on Base, can you tell me what 200000 and 350000 gas units would cost in USD right now? I want to make sure fees are reasonable."},{"title":"Gas budget planner for batch operations","prompt":"I'm about to run several on-chain operations on Base. Can you estimate what 21000, 65000, and 500000 gas units will cost in USD at the current gas price?"},{"title":"Real-time gas monitoring alert","prompt":"What is the current gas price on Base in wei, and how much would a simple 21000-gas ETH transfer cost in dollars at today's ETH price?"}],"resultDescription":"Returns a JSON object with: ok (boolean), current block number, ETH/USD exchange rate, current gas price in wei, and an array of cost objects each pairing a requested gas limit with its USD cost.","failureModes":["More than 8 gas_limits values provided — request rejected","Gas limit value outside 21000–5000000 range — validation error","Malformed comma-separated gas_limits string — parse error","Payment not provided or insufficient USDC — 402 Payment Required","Network or upstream RPC unavailability — 5xx error"],"whenToPreferThis":"Choose this endpoint when an AI agent needs real-time gas fee estimates for Base (EVM L2) transactions without setting up API keys or accounts — particularly useful for pay-as-you-go agent workflows that need to budget or gate on current transaction costs. Prefer over self-hosted RPC calls when simplicity and no-account access matter.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-19T12:47:40.802Z","isFirstParty":false}