Gas fee history for 16 EVM chains over up to 100 recent blocks
Gas fee history for 16 EVM chains over up to 100 recent blocks: base fee, block fullness and priority tip at chosen percentiles for each block.
Answeringour last check, 2026-10-21
1 of 1checks answered this week
489 msmedian answer time
$0.01listed price per call
$0.01price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://saylorinnovations.com/api/chain/fee-history
| Category | Everything else |
|---|---|
| Provider host | saylorinnovations.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-21 | valid payment request | 402 | $0.01 | 489 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"blocks": "10",
"chain": "ethereum"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"blocks": {
"description": "optional number of recent blocks, 1 to 100 (default 20)",
"type": "string"
},
"chain": {
"description": "chain name (ethereum, base, arbitrum, optimism, polygon, bsc, avalanche, gnosis, linea, scroll, mantle, blast, sonic, celo, berachain, unichain) or chain id",
"type": "string"
}
},
"required": [
"chain"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"avg_base_fee_gwei": {
"description": "average base fee over the history",
"type": "number"
},
"avg_gas_used_ratio": {
"description": "average share of the gas limit used",
"type": [
"number",
"null"
]
},
"avg_tip_gwei": {
"description": "average priority tip at the middle percentile",
"type": [
"number",
"null"
]
},
"blocks": {
"description": "blocks in the history",
"type": "number"
},
"chain": {
"description": "the chain name that was queried",
"type": "string"
},
"chain_id": {
"description": "EIP-155 chain id of that network",
"type": "number"
},
"history": {
"description": "one entry per block, oldest first",
"items": {
"properties": {
"base_fee_gwei": {
"description": "base fee of that block, gwei",
"type": [
"number",
"null"
]
},
"block": {
"description": "block number",
"type": [
"number",
"null"
]
},
"gas_used_ratio": {
"description": "share of the gas limit used",
"type": [
"number",
"null"
]
},
"tip_p10_gwei": {
"description": "10th percentile priority tip, gwei",
"type": [
"number",
"null"
]
},
"tip_p50_gwei": {
"description": "median priority tip, gwei",
"type": [
"number",
"null"
]
},
"tip_p90_gwei": {
"description": "90th percentile priority tip, gwei",
"type": [
"number",
"null"
]
}
},
"type": "object"
},
"type": [
"array",
"null"
]
},
"max_base_fee_gwei": {
"description": "highest base fee in the history",
"type": "number"
},
"min_base_fee_gwei": {
"description": "lowest base fee in the history",
"type": "number"
},
"newest_block": {
"description": "last block in the history",
"type": "number"
},
"next_block_base_fee_gwei": {
"description": "protocol base fee for the next block, gwei",
"type": "number"
},
"note": {
"description": "plain-language reading of the result, including units",
"type": "string"
},
"oldest_block": {
"description": "first block in the history",
"type": "number"
},
"percentiles": {
"description": "tip percentiles requested",
"type": [
"array",
"null"
]
},
"source": {
"description": "where the data was read from",
"type": "string"
},
"tip_percentile_used": {
"description": "percentile used for avg_tip_gwei",
"type": "string"
}
},
"required": [
"chain",
"chain_id",
"blocks",
"next_block_base_fee_gwei",
"avg_base_fee_gwei",
"history",
"note",
"source"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}