{"uid":"cap_ag5kAHgHCxqlDN13b0iVi","slug":"xerxes-base-gas-price-api-3c7d2f16","name":"Xerxes Base Gas Price API","description":"Base gas price, base fee and priority fee at head. Not an estimate of a specific call. Unread RPC is not zero.","url":"https://ari001.tailb4ac3a.ts.net/v1/base/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":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"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_2AO-jio-RbbPiDXOKKuCE","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 the current base gas price, base fee, and priority fee on the Base blockchain at the chain head (not a per-call estimate).","exampleAgentPrompt":"What's the current base fee and priority fee on Base right now — I want to know the live gas prices at the chain head before I submit a transaction.","exampleUseCases":[{"title":"Pre-transaction gas check","prompt":"Before I send this Base transaction, what are the current base fee and priority fee at the chain head so I can set the right gas parameters?"},{"title":"Gas cost monitoring for DeFi bot","prompt":"Keep an eye on Base gas prices for me — what's the base fee and priority fee right now so I can decide whether it's cheap enough to execute this swap?"},{"title":"Fee estimation for wallet UI","prompt":"What are the current EIP-1559 gas parameters on Base — the base gas price, base fee, and priority fee — so I can display an accurate fee estimate to the user?"}],"resultDescription":"Returns the current base gas price, EIP-1559 base fee, and priority fee (miner tip) as observed at the latest block head on the Base network. These are network-level values, not estimates for a specific transaction or call.","failureModes":["RPC node unavailable or unresponsive — returns error indicating dead RPC","Network congestion may cause slight staleness in returned values","Payment not provided or invalid x402 payment header — returns 402 Payment Required","Malformed request — returns 4xx error"],"whenToPreferThis":"Use this endpoint when an agent needs real-time, raw EIP-1559 gas parameters (base fee + priority fee) on the Base L2 network at the current chain head, especially before constructing or submitting a transaction. Prefer this over Ethereum mainnet gas APIs when the target chain is Base specifically.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:31:00.222Z","isFirstParty":false}