{"uid":"cap_peWWGgUHPFyHaQZXiheO7","slug":"saylor-innovations-evm-gas-price-663689fe","name":"Saylor Innovations EVM Gas Price","description":"Current gas price on 16 EVM chains: gwei, base fee, next base fee, slow, standard and fast priority tips from recent blocks, and the cost of a transfer.","url":"https://saylorinnovations.com/api/chain/gas-price?utm_source=zero.xyz","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","required":["chain"],"properties":{"chain":{"type":"string","description":"chain name (ethereum, base, arbitrum, optimism, polygon, bsc, avalanche, gnosis, linea, scroll, mantle, blast, sonic, celo, berachain, unichain) or chain id"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string","const":"json"},"example":{"type":"object","required":["chain","chain_id","gas_price_gwei","transfer_cost_native","source"],"properties":{"note":{"type":"string","description":"plain-language reading of the result"},"chain":{"type":"string","description":"the chain name that was queried"},"source":{"type":"string","description":"where the data was read from"},"chain_id":{"type":"number","description":"EIP-155 chain id of that network"},"block_number":{"type":["number","null"],"description":"latest block the figures are based on"},"base_fee_gwei":{"type":["number","null"],"description":"base fee of the latest block in gwei"},"gas_price_wei":{"type":"string","description":"current gas price in wei, as a string"},"native_symbol":{"type":"string","description":"native currency of the chain"},"gas_price_gwei":{"type":"number","description":"current gas price in gwei"},"next_base_fee_gwei":{"type":["number","null"],"description":"projected base fee of the next block in gwei"},"transfer_cost_native":{"type":"number","description":"cost of a plain 21,000-gas transfer in the native currency"},"transfer_cost_symbol":{"type":"string","description":"symbol of that cost"},"avg_block_fullness_pct":{"type":["number","null"],"description":"average share of the gas limit used over the last 20 blocks"},"priority_fee_fast_gwei":{"type":["number","null"],"description":"90th percentile tip over the last 20 blocks, gwei"},"priority_fee_slow_gwei":{"type":["number","null"],"description":"10th percentile tip over the last 20 blocks, gwei"},"priority_fee_standard_gwei":{"type":["number","null"],"description":"median tip over the last 20 blocks, gwei"},"priority_fee_suggested_gwei":{"type":["number","null"],"description":"node-suggested priority tip in gwei"}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_oXs4j78ljhpWVJbTwAsEt","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns current gas prices (gwei, base fee, next base fee, slow/standard/fast priority tips) and plain-transfer cost for any of 16 supported EVM chains.","exampleAgentPrompt":"What's the current gas price on Arbitrum — give me the base fee, next base fee, and slow/standard/fast priority tips in gwei, plus what a plain ETH transfer would cost right now?","exampleUseCases":[{"title":"Pre-transaction gas check on Ethereum","prompt":"Before I send this ETH transfer, what's the current gas situation on Ethereum — base fee, next base fee, and fast priority tip in gwei?"},{"title":"Cheapest chain selection for DeFi action","prompt":"I need to do a quick transfer and want to keep fees low — what does a plain transfer cost on Base right now in native currency?"},{"title":"Gas monitoring for automated agent workflow","prompt":"Check the current gas price on Polygon and tell me whether the average block fullness is high — I want to know if it's a good time to submit a transaction."}],"resultDescription":"A JSON object containing the queried chain name and chain ID, current gas price in both gwei and wei, EIP-1559 base fee and projected next base fee in gwei, slow/standard/fast priority fee tips derived from recent blocks, cost of a plain 21,000-gas ETH transfer in the native currency, average block fullness percentage over the last 20 blocks, latest block number, native currency symbol, data source, and a plain-language note summarising the result.","failureModes":["Unsupported chain name or ID returns an error — only the 16 named chains are valid","Chain RPC temporarily unavailable may return null for some fields like base_fee_gwei or block_number","Stale data if the underlying RPC node lags behind the latest block","Network-level errors (timeouts, 402 payment required if USDC payment not attached)","Malformed chain query string returns validation error"],"whenToPreferThis":"Use this endpoint when you need real-time, per-block gas price intelligence for any of 16 popular EVM chains, including EIP-1559 base fee projections and priority tip tiers. It is especially useful for pre-transaction cost estimation, DeFi workflow automation, or gas-sensitive agent decisions. Prefer it over generic blockchain explorers when you need structured JSON with slow/standard/fast priority breakdowns and native-currency transfer cost in one call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-27T13:05:32.109Z","isFirstParty":false,"canonicalSlug":"saylor-innovations-evm-gas-price-663689fe"}