{"slug":"api-seneschal-space-v1-q-base-fee-0b2991","title":"Single-fact","host":"api.seneschal.space","method":"GET","resource":"https://api.seneschal.space/v1/q/base-fee","category":"market","description":"Single-fact: what does Ethereum mainnet gas cost RIGHT NOW? Returns the latest block’s base fee + blob base fee AND the consensus-computed next-block projection (not a guess — the protocol’s own EIP-1559/4844 arithmetic), straight from eth_feeHistory. Fields: {block, base_fee_gwei, blob_base_fee_gwe","price_listed":0.001,"price_asked":0.001,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":948,"reported_calls_30d":4,"reported_payers_30d":3,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"method":"GET","queryParams":{},"type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"method":{"enum":["GET"],"type":"string"},"queryParams":{"properties":{},"type":"object"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"},"output":{"properties":{"example":{"properties":{"as_of_ms":{"type":"integer"},"base_fee_gwei":{"type":"number"},"base_fee_wei":{"type":"string"},"blob_base_fee_gwei":{"type":"number"},"blob_base_fee_wei":{"type":"string"},"blob_gas_used_ratio":{"type":"number"},"block":{"type":"integer"},"gas_used_ratio":{"type":"number"},"next_base_fee_gwei":{"type":"number"},"next_blob_base_fee_gwei":{"type":"number"},"next_block":{"type":"integer"}},"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-09-24","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.001,"price_match":true,"latency_ms":948,"error":null}],"description_full":"Single-fact: what does Ethereum mainnet gas cost RIGHT NOW? Returns the latest block’s base fee + blob base fee AND the consensus-computed next-block projection (not a guess — the protocol’s own EIP-1559/4844 arithmetic), straight from eth_feeHistory. Fields: {block, base_fee_gwei, blob_base_fee_gwei, gas_used_ratio, next_base_fee_gwei, next_blob_base_fee_gwei}. Bulk per-block history: /v1/premium/fee-history.csv ($0.05, up to 1024 blocks/call).","last_updated":"2026-09-08T08:04:22.039Z","schemes":["exact"]}