{"uid":"cap_K3ZKtR-S8xMGlrrg7rlsq","slug":"grey-ridge-signals-base-network-fee-estimator-x402-3e1295a4","name":"Grey Ridge Signals — Base Network Fee Estimator (x402)","description":"Pay-per-call market & on-chain data for Base trading agents over x402: live DeFi yields, cross-venue funding rates, token prices, Polymarket and RPC data — plus a pre-trade token-safety gate (GO/HOLD/BLOCK). No account, no API key; agents pay inline in USDC from $0.001/call.","url":"https://x402-data-api.sigrunner.workers.dev/chain/fee-estimate?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"chain":"base","tiers":{"fast":{"max_fee_gwei":0.02},"slow":{"max_fee_gwei":0.008},"standard":{"max_fee_gwei":0.012}},"base_fee_gwei":0.006,"priority_fee_gwei":0.001,"transfer_cost_eth":{"standard":2.5e-7}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_vSDl1ckWngvipYUiCWiil","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns current Base network gas fee estimates (fast/standard/slow tiers) including base fee, priority fee, and ETH transfer cost, paid inline via x402 with no API key required.","exampleAgentPrompt":"What are the current gas fees on Base — give me the fast, standard, and slow gwei tiers so I know what to set before submitting my transaction?","exampleUseCases":[{"title":"Gas check before on-chain swap","prompt":"Before I execute this swap on Base, what are the current fast, standard, and slow gas fee tiers in gwei? I want to make sure I'm not overpaying."},{"title":"Cost estimation for agent transaction","prompt":"My agent is about to send a batch of transactions on Base — can you pull the current fee estimates so I can calculate the ETH cost and decide whether to proceed now or wait for lower fees?"},{"title":"Trading bot pre-flight fee check","prompt":"Check the current Base network gas fees for me — I need the base fee, priority fee, and estimated transfer cost in ETH before my trading bot fires off its next order."}],"resultDescription":"A JSON object with the chain name ('base'), a tiers object containing fast/standard/slow max fee values in gwei, the current base fee in gwei, the current priority fee in gwei, and the estimated ETH cost for a standard transfer.","failureModes":["Payment not settled (402): x402 payment not included or insufficient USDC","RPC node unavailable: upstream Base node unreachable, returns 5xx","Stale data: fee data may lag real-time chain state by a few seconds","Invalid or missing parameters: non-Base chains not supported"],"whenToPreferThis":"Choose this endpoint when an autonomous agent or trading bot needs real-time Base network gas fee data without an API key or account setup, especially when operating in a pay-per-call context using x402/USDC micropayments. Prefer this over Etherscan or Alchemy gas APIs when you want zero-friction, inline payment with no subscription overhead.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-25T00:42:27.379Z","isFirstParty":false,"canonicalSlug":"grey-ridge-signals-base-network-fee-estimator-x402-3e1295a4"}