{"uid":"cap_5KbieC11hxACrU-tuPSm8","slug":"m2m-sentinel-gas-fee-observer-88d2b0ed","name":"M2M Sentinel Gas Fee Observer","description":"What a Base transaction costs right now, with the RPC provider and trust level behind the number, so a caller can tell a credentialed reading from a degraded one before pricing a transaction.","url":"https://api.m2msentinel.com/v1/gas/fees","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":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","required":["status"],"properties":{"status":{"type":"string","const":"SUCCESS"},"network":{"type":"string"},"gasPrice":{"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_a_qjR7PqbXQ3PkHSabexS","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 network base gas fee with source provenance metadata","exampleAgentPrompt":"What's the current base gas fee on the Base network right now? I need the live fee with source provenance so I can estimate transaction costs.","exampleUseCases":[{"title":"Pre-transaction gas cost estimation","prompt":"Before I submit this onchain transaction on Base, what's the current gas fee so I can estimate the total cost?"},{"title":"Gas spike alerting for DeFi agent","prompt":"Check the current Base gas fee and let me know if it's spiked above normal — I want to hold off on executing trades if gas is expensive right now."},{"title":"Onchain analytics gas data enrichment","prompt":"Pull the latest base gas fee observation from Base with its source provenance — I need it to enrich my transaction cost analytics dashboard."}],"resultDescription":"Returns a JSON object with a SUCCESS status, the Base network identifier, and a gasPrice object reflecting the current base gas fee, along with source provenance indicating where the observation originated.","failureModes":["Network unavailability may return a non-SUCCESS status","Gas fee data may be momentarily stale during high network congestion","Missing or malformed response if the upstream Base RPC source is unreachable","Payment failure (402) if the $0.005 USDC micropayment is not processed correctly via x402 protocol"],"whenToPreferThis":"Use this endpoint when you need a real-time, provenance-tagged observation of the current Base network gas fee — particularly when you need to know not just the fee value but also the source of that observation for auditability or multi-source validation. Prefer this over generic RPC calls when operating in an agentic, pay-per-call context already using the x402 micropayment protocol on Base.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:33:19.738Z","isFirstParty":false}