EVM gas price API: current gas fees for Ethereum, Base, Polygon, Arbitrum, Optimism, BSC,
EVM gas price API: current gas fees for Ethereum, Base, Polygon, Arbitrum, Optimism, BSC, and Avalanche — node-reported gas price plus EIP-1559 estimates from the last 5 blocks: next base fee and 25th/50th/75th-percentile priority fees, in gwei. Read directly from public JSON-RPC nodes with automatic fallbacks. Use for transaction cost estimation, fee optimization, and timing on-chain actions. Cached up to 15 seconds.
2000 (raw units)
price
5
calls / 30d
3
unique payers
2026-08-30
updated
Provider
gateway.stride20k.com · discovered, not yet claimed by its owner
Payment (x402 accepts[])
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0x552Cc4A10878C7F20574489D47184249657Ca3f6",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "2000",
"maxTimeoutSeconds": 60
}
]Output schema
{
"bazaar": {
"info": {
"input": {
"method": "GET",
"pathParams": {
"chain": "base"
},
"queryParams": {},
"type": "http"
},
"output": {
"example": {
"data": {
"blocksSampled": 5,
"chain": "base",
"gasPriceGwei": 0.006,
"gasPriceWei": "6000000",
"nextBaseFeeGwei": 0.005,
"priorityFeeGwei": {
"p25": 0.0006,
"p50": 0.0011,
"p75": 0.003
}
},
"endpoint": "/crypto/gas/:chain",
"meta": {
"attribution": null,
"cached": false,
"fetchedAt": "2026-07-04T00:00:00.000Z",
"source": "on-chain (PublicNode/dRPC JSON-RPC)"
},
"ok": true
},
"type": "json"
}
},
"routeTemplate": "/crypto/gas/:chain",
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"pathParams": {
"properties": {
"chain": {
"aliases": {
"1": "ethereum",
"10": "optimism",
"56": "bsc",
"137": "polygon",
"8453": "base",
"42161": "arbitrum",
"43114": "avalanche",
"arb": "arbitrum",
"avax": "avalanche",
"bnb": "bsc",
"eth": "ethereum",
"matic": "polygon",
"op": "optimism"
},
"description": "Chain to query. Shorthands accepted: 1, 10, 56, 137, 8453, 42161, 43114, eth, arb, op, matic, avax, bnb.",
"enum": [
"ethereum",
"base",
"polygon",
"arbitrum",
"optimism",
"bsc",
"avalanche"
],
"missTrack": true,
"normalize": "lower",
"type": "string"
}
},
"required": [
"chain"
],
"type": "object"
},
"queryParams": {
"properties": {},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"data": {
"properties": {
"blocksSampled": {
"description": "Number of blocks in the fee-history sample.",
"type": "integer"
},
"chain": {
"description": "Chain queried.",
"type": "string"
},
"gasPriceGwei": {
"description": "eth_gasPrice in gwei.",
"type": "number"
},
"gasPriceWei": {
"description": "eth_gasPrice result in wei, as decimal string.",
"type": "string"
},
"nextBaseFeeGwei": {
"description": "Projected next-block base fee in gwei (EIP-1559).",
"type": "number"
},
"priorityFeeGwei": {
"description": "Average priority fee over last 5 blocks at p25/p50/p75, gwei.",
"type": "object"
}
},
"required": [
"chain",
"gasPriceWei",
"gasPriceGwei"
],
"type": "object"
},
"endpoint": {
"description": "Always \"/crypto/gas/:chain\".",
"type": "string"
},
"meta": {
"properties": {
"attribution": {
"description": "Licensing attribution when the source requires it.",
"type": [
"string",
"null"
]
},
"cached": {
"description": "Whether this response was served from cache.",
"type": "boolean"
},
"fetchedAt": {
"description": "ISO 8601 time the data was actually retrieved from the upstream.",
"type": "string"
},
"source": {
"description": "Upstream source: on-chain (PublicNode/dRPC JSON-RPC).",
"type": "string"
}
},
"required": [
"source",
"cached",
"fetchedAt"
],
"type": "object"
},
"ok": {
"description": "true on success.",
"type": "boolean"
}
},
"required": [
"ok",
"endpoint",
"data",
"meta"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
}Use it
curl
curl "https://gateway.stride20k.com/crypto/gas/:chain" # -> 402 Payment Required, accepts[] lists how to pay # retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://gateway.stride20k.com/crypto/gas/:chain");
if (res.status === 402) {
const { accepts } = await res.json();
// pay one of accepts[] via an x402 client, then retry with the payment header
}Python
import httpx
res = httpx.get("https://gateway.stride20k.com/crypto/gas/:chain")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerMachine-readable
Everything on this page is also available as clean JSON at /resources/1149.json, and this resource appears in /discovery/resources and /discovery/search.