{"uid":"cap_9zZT3lFfZQ-2bCFZl_SLC","slug":"base-network-gas-price-oracle-a7e35968","name":"Base Network Gas Price Oracle","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/chain/gas-price?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_MzUV9frQCUehi6zBVT7gh","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 in multiple tiers (slow/standard/fast) with USD cost estimates and congestion metrics for a given gas limit","exampleAgentPrompt":"What's the current gas price on Base right now — give me slow, standard, and fast tiers with USD cost estimates for a standard ETH transfer (21000 gas)?","exampleUseCases":[{"title":"Pre-trade gas cost check","prompt":"Before I submit this swap on Base, what's the current gas price and how much will it cost in USD at standard tier for roughly 150000 gas units?"},{"title":"Network congestion monitoring","prompt":"Is the Base network congested right now? Give me the current congestion level and tell me which gas tier you'd recommend."},{"title":"Automated tx fee budgeting","prompt":"I'm about to batch some onchain transactions on Base — what's the fast-tier gas price in gwei and estimated USD cost for 21000 gas so I can set my fee budget?"}],"resultDescription":"A JSON object containing the current Base block number, chain ID (8453), a congestion score (0–1), base fee in gwei, recommended tier, and three gas price tiers (slow/standard/fast) each with max fee per gas, max priority fee, estimated USD cost, and hex-encoded EIP-1559 transaction fields ready to plug into a transaction object.","failureModes":["RPC unavailability from mainnet.base.org causes stale or failed response","Payment failure (402) if USDC x402 micropayment not included or insufficient","gas_limit below 21000 or above 30000000 returns validation error","Network congestion spikes may cause rapid price staleness between fetch and broadcast"],"whenToPreferThis":"Use this endpoint when your agent needs real-time Base L2 gas prices without requiring an API key, paying only $0.001 USDC per call via x402. Ideal for trading or onchain agents that need EIP-1559-ready hex tx fields and USD cost estimates in one call, especially when operating autonomously without pre-provisioned API credentials.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:40:18.534Z","isFirstParty":false,"canonicalSlug":"base-network-gas-price-oracle-f098aea0"}