{"uid":"cap_DzArzdRUbrEjbsibMWM2b","slug":"base-gas-oracle-x402-microdata-8922a556","name":"Base Gas Oracle (x402 Microdata)","description":"Pay-per-call crypto microdata for trading/onchain AI agents via x402 (USDC on Base): Base gas, token risk, balances, multi-venue prices, Hyperliquid book/funding, kimchi premium. No API keys.","url":"https://kr-x402-mvp.kgy5612.workers.dev/api/etherscan/gas-oracle?utm_source=zero.xyz","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"],"type":"string"},"queryParams":{"type":"object","properties":{"gas_limit":{"type":"integer","maximum":30000000,"minimum":21000,"examples":[21000,150000],"description":"Gas units to price (default 21000)"}},"additionalProperties":false}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"block":37000000,"chain":"base","tiers":{"fast":{"est_cost_usd":0.0007,"max_fee_gwei":0.025,"max_priority_fee_gwei":0.01},"slow":{"est_cost_usd":0.0005,"max_fee_gwei":0.006,"max_priority_fee_gwei":0.001},"standard":{"est_cost_usd":0.0005,"max_fee_gwei":0.011,"max_priority_fee_gwei":0.001}},"sources":["https://mainnet.base.org"],"chain_id":8453,"tx_fields":{"gas":"0x5208","type":"0x2","maxFeePerGas":"0xa7d8c0","maxPriorityFeePerGas":"0xf4240"},"congestion":0.42,"updated_at":"2026-10-29T13:30:00Z","base_fee_gwei":0.005,"gas_price_gwei":0.006,"recommended_tier":"standard","gas_price_wei_hex":"0x5b8d80","est_transfer_cost_eth":1.26e-7,"max_priority_fee_gwei":0.001,"max_priority_fee_wei_hex":"0xf4240"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_iL3cRxu-JTrl9G1nkzMSt","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns current Base L2 gas prices, fee tiers (slow/standard/fast), congestion level, and estimated transaction costs for a given gas limit, paid per-call via x402 USDC.","exampleAgentPrompt":"What are the current gas prices on Base right now — give me the slow, standard, and fast tiers with estimated USD costs for a standard ETH transfer (21000 gas units)?","exampleUseCases":[{"title":"Pre-trade gas cost check","prompt":"Before I send this token swap on Base, what's the recommended gas fee tier and how much will it cost me in USD at current network conditions for about 150000 gas units?"},{"title":"Monitor Base congestion level","prompt":"Is the Base network congested right now? What's the current gas price and which fee tier do you recommend I use?"},{"title":"Automated agent transaction budgeting","prompt":"I'm about to batch-submit a transaction on Base — tell me the current fast-tier maxFeePerGas and maxPriorityFeePerGas in gwei and the hex values I'd put in the tx fields, for 21000 gas."}],"resultDescription":"A JSON object with the current Base block number, base fee in gwei, gas price in gwei and wei hex, EIP-1559 tx fields (gas, type, maxFeePerGas, maxPriorityFeePerGas) in hex, slow/standard/fast fee tiers each with max_fee_gwei, max_priority_fee_gwei, and est_cost_usd, a congestion score (0–1), a recommended_tier label, data sources, chain ID (8453), and an updated_at timestamp.","failureModes":["RPC source (mainnet.base.org) unavailable — may return stale or error response","Payment failure via x402 (insufficient USDC balance) — 402 response before data is returned","Invalid gas_limit parameter (below 21000 or above 30000000) — validation error","Network timeout if Base RPC is slow — may result in delayed or failed response"],"whenToPreferThis":"Choose this endpoint when your AI agent needs real-time Base L2 gas data without managing API keys, paying only $0.001 USDC per call via x402. Ideal for onchain trading bots, DeFi automation agents, or any workflow that needs EIP-1559-compatible fee fields ready to plug into a transaction — especially when operating on the Base chain specifically rather than Ethereum mainnet or other L2s.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-11-02T18:33:29.849Z","isFirstParty":false,"canonicalSlug":"base-gas-oracle-x402-microdata-8922a556"}