{"uid":"cap_HL6BJOJVJJ-XiTA8SNH_G","slug":"gas-oracle-history-base-fee-trajectory-congestion-af01d2de","name":"Gas Oracle History – Base-Fee Trajectory & Congestion","description":"Base-fee trajectory + congestion over up to 1024 blocks","url":"https://x402.professorsausages.com/gas-oracle/:chain/history","method":"GET","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_8NJhD3LefQm5mc4Y6D3ad","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns historical base-fee trajectory and gas congestion data over up to 1024 blocks for a specified blockchain chain.","exampleAgentPrompt":"Can you pull the base-fee trajectory and congestion trend for Ethereum over the last 512 blocks so I can see whether gas is rising or falling right now?","exampleUseCases":null,"resultDescription":"Returns a structured object containing the chain name, block range (fromBlock/toBlock), number of blocks analyzed, per-block time series of base fees and gas-used ratios, statistical summaries (min/max/avg) of base fee in Gwei, an overall congestion trend indicator, and the fetch timestamp — giving a full historical gas market picture.","failureModes":["Unsupported chain identifier returns an error or empty result","Requested block count exceeds 1024 limit — capped or rejected","Chain RPC unavailable causes fetch failure","Very recent blocks may not yet be indexed, causing partial series","Invalid chain slug returns 400-level error"],"whenToPreferThis":"Choose this endpoint when you need historical gas context — trend direction, congestion patterns, or fee volatility — rather than just the current gas price. It complements the current-gas-market endpoint by providing the trajectory needed for timing optimization, smart contract scheduling, or alerting logic. Best when you need up to 1024 blocks of granular base-fee and gas-used-ratio series data for EVM-compatible chains.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T12:46:12.930Z","isFirstParty":false}