Saylor Innovations Agent Bazaar by Saylor Innovations
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mirrored listing x402 eip155:8453

Live gas market on any major EVM chain: current gas price, base fee and priority-fee perce

Live gas market on any major EVM chain: current gas price, base fee and priority-fee percentiles (p25/p50/p75) in gwei, plus the estimated cost in native token and USD for a plain transfer (21k gas) and a typical DEX swap (200k gas). Lets an agent decide whether a transaction is worth sending right now or should wait for cheaper gas, and budget the fee before signing.

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2000 (raw units)
price
4
calls / 30d
2
unique payers
2026-09-17
updated

Provider

chain.cyberwarex.com · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x058D0Cc5CC97e61e8A9f38D6d6365bce525921B2",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "2000",
    "maxTimeoutSeconds": 300
  }
]

Output schema

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "chain": "base"
        },
        "type": "http"
      },
      "output": {
        "example": {
          "base_fee_gwei": 0.004119,
          "chain": "base",
          "est_cost": {
            "swap_200k": {
              "native": 0.000001127,
              "usd": 0.003599
            },
            "transfer_21k": {
              "native": 1.18e-7,
              "usd": 0.000377
            }
          },
          "gas_price_gwei": 0.008312,
          "native": "ETH",
          "native_usd": 3194.51,
          "priority_fee_gwei": {
            "p25": 0.001,
            "p50": 0.0015,
            "p75": 0.0031
          }
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            },
            "queryParams": {
              "additionalProperties": false,
              "properties": {
                "chain": {
                  "default": "base",
                  "description": "EVM chain to query.",
                  "enum": [
                    "base",
                    "ethereum",
                    "arbitrum",
                    "optimism",
                    "polygon"
                  ],
                  "type": "string"
                }
              },
              "required": [],
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "properties": {
                "base_fee_gwei": {
                  "type": [
                    "number",
                    "null"
                  ]
                },
                "chain": {
                  "type": "string"
                },
                "est_cost": {
                  "description": "Estimated native + USD cost for transfer_21k and swap_200k.",
                  "type": "object"
                },
                "gas_price_gwei": {
                  "type": "number"
                },
                "native": {
                  "type": "string"
                },
                "native_usd": {
                  "type": [
                    "number",
                    "null"
                  ]
                },
                "priority_fee_gwei": {
                  "description": "Priority fee percentiles p25/p50/p75 in gwei.",
                  "type": [
                    "object",
                    "null"
                  ]
                }
              },
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

Use it

curl

curl "https://chain.cyberwarex.com/gas"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://chain.cyberwarex.com/gas");
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://chain.cyberwarex.com/gas")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Machine-readable

Everything on this page is also available as clean JSON at /resources/6851.json, and this resource appears in /discovery/resources and /discovery/search.