{"uid":"cap_FVXLEwm9d1vJNfBk3sUj_","slug":"avasis-base-chain-gas-tip-feed-eb207e60","name":"Avasis Base Chain Gas Tip Feed","description":"Base (chain 8453) gas tip for agents that send transactions: latest block number and age, base fee, eth_gasPrice, eth_maxPriorityFeePerGas and a suggested maxFeePerGas (2x base fee + priority), from one batched RPC call every 2 s. Long-poll with ?since=<seq>&wait=25. Prepaid meter price $0.0002/call (packs at /v1/meter); SSE at /v1/stream/tips.","url":"https://agents.avasis.ai/v1/tip/base-gas?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"seq":812,"data":{"gwei":{"baseFee":0.0021,"gasPrice":0.0031,"maxPriorityFee":0.001,"suggestedMaxFee":0.0052},"chain":"base","chainId":8453,"blockNumber":37400000,"blockAgeSeconds":1},"ageMs":420,"stale":false,"topic":"base-gas","changed":true,"observedAt":"2026-10-29T12:00:00.000Z"}},"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_3NJReBgdU_IoeFBur4zy-","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 real-time Base (chain 8453) gas fee data including base fee, gas price, max priority fee, and suggested max fee per gas from a batched RPC call updated every 2 seconds","exampleAgentPrompt":"What are the current gas fees on Base chain right now — base fee, priority fee, and what you'd suggest for maxFeePerGas?","exampleUseCases":[{"title":"Pre-flight gas check before on-chain swap","prompt":"Before I submit this swap on Base, can you check the current gas fees — specifically the suggested maxFeePerGas and priority fee — so I can set sensible transaction limits?"},{"title":"Gas spike alert for DeFi trading bot","prompt":"Monitor Base chain gas fees and alert me when the base fee drops below 0.003 gwei so I know it's a good time to execute my pending transactions cheaply."},{"title":"Cost estimation for batch NFT mint","prompt":"I'm about to mint 50 NFTs on Base — what's the current gas price and suggested maxFeePerGas so I can estimate my total transaction cost in gwei?"}],"resultDescription":"A JSON object containing a sequence number, timestamp, staleness flag, and a data payload with the chain name, chain ID (8453), current block number, block age in seconds, and gas values in gwei: baseFee, gasPrice, maxPriorityFee, and suggestedMaxFee (calculated as 2x base fee + priority fee). Also includes an ageMs field indicating how old the cached data is and a changed flag indicating whether values shifted since the last poll.","failureModes":["Stale data if the RPC source is delayed (stale:true in response)","Long-poll timeout if no new block arrives within the wait window","402 Payment Required if prepaid meter balance is exhausted","Invalid since parameter returning unexpected sequence data","Network errors from upstream Base RPC nodes causing empty or error responses"],"whenToPreferThis":"Use this endpoint when an AI agent needs to submit transactions on the Base chain and must set appropriate EIP-1559 gas parameters (baseFee, maxPriorityFeePerGas, maxFeePerGas). It is particularly useful when you want low-latency, pre-aggregated gas data without constructing your own RPC call, or when you need to long-poll for gas fee changes efficiently. Prefer this over raw eth_gasPrice calls when you need the suggestedMaxFee calculation already done and the data batched from a single RPC round-trip updated every 2 seconds.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:39:38.903Z","isFirstParty":false,"canonicalSlug":"avasis-base-chain-gas-tip-feed-eb207e60"}