Roundhouse

Gas Price

Gas price: live gas fees for Ethereum, Base, Arbitrum, Polygon and Solana in one call. Use before sending a transaction to pick a fee or the cheapest chain. Returns base fee, slow/standard/fast priority fees, max fee, congestion, and the USD cost of a transfer, an ERC-20 transfer and a swap per chain, plus Solana priority fees. Optional chain. 0.001 USDC/call; failed calls are free.

MediaLiveeip155:8453Exactvia cdp
https://x402-seller-pmlm.onrender.com/gas
Gas priceGas feesEthereum gasEstimate gasSolana priority fee
Calls · 30d
10↑ 33%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 21 snapshots so far.
$0.49
Verified settled volume
105 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0010
Listed price
As published in the catalog. Always read the live 402 before paying.
10
Calls · 30d
Upstream's own call count for this endpoint, not ours.
6
Unique payers · 30d
Last called 2026-10-18 22:42Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x079471E6F43b6feeF80895E19cBFcBB496904852

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.001USDC≈ $0.001 USD
on Base · exact scheme

Pay 0.001 USDC on Base to 0x0794…04852. The signed payment is good for 5 minutes.

Paid to
0x0794…04852
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
1000 smallest units
1000units
on Polygon · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to
0x0794…04852
Token contract
0x3c49…c3359
Payment window
5 minutes
1000units
on Arbitrum · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to
0x0794…04852
Token contract
0xaf88…e5831
Payment window
5 minutes
1000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to
787RZw…uqKeW
Token contract
EPjFWd…TDt1v
Payment window
5 minutes
1000units
on eip155:43114 · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to
0x0794…04852
Token contract
0xB97E…48a6E
Payment window
5 minutes
1000units
on eip155:1329 · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to
0x0794…04852
Token contract
0xe15f…42392
Payment window
5 minutes
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x079471E6F43b6feeF80895E19cBFcBB496904852",
    "amount": "1000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x079471E6F43b6feeF80895E19cBFcBB496904852",
    "amount": "1000",
    "scheme": "exact",
    "network": "eip155:137",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x079471E6F43b6feeF80895E19cBFcBB496904852",
    "amount": "1000",
    "scheme": "exact",
    "network": "eip155:42161",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
    },
    "payTo": "787RZwDGpjmRsG5wgnyBeWQHBuARax8Qo6P7dmDuqKeW",
    "amount": "1000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0xB97EF9Ef8734C71904D8002F8b6Bc66Dd9c48a6E",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x079471E6F43b6feeF80895E19cBFcBB496904852",
    "amount": "1000",
    "scheme": "exact",
    "network": "eip155:43114",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0xe15fC38F6D8c56aF07bbCBe3BAf5708A2Bf42392",
    "extra": {
      "name": "USDC",
      "version": "2"
    },
    "payTo": "0x079471E6F43b6feeF80895E19cBFcBB496904852",
    "amount": "1000",
    "scheme": "exact",
    "network": "eip155:1329",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "chain": "all"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "cached": false,
          "chains": [
            {
              "block": 26131718,
              "chain": "ethereum",
              "nativeUsd": 2697.7,
              "baseFeeGwei": 0.129579,
              "costStandard": {
                "swap": {
                  "usd": 0.08764,
                  "native": 0.0000324884
                },
                "erc20Transfer": {
                  "usd": 0.03165,
                  "native": 0.0000117319
                },
                "nativeTransfer": {
                  "usd": 0.01023,
                  "native": 0.00000379031
                }
              },
              "gasUsedRatio": 0.529,
              "nativeSymbol": "ETH",
              "priorityFeeGwei": {
                "fast": 1,
                "slow": 0.001,
                "standard": 0.050912
              },
              "maxFeePerGasGwei": {
                "fast": 1.25916,
                "slow": 0.260158,
                "standard": 0.31007
              }
            },
            {
              "note": "L2 execution cost only; the rollup adds a small L1 data fee per tx",
              "block": 52240417,
              "chain": "base",
              "nativeUsd": 2697.8,
              "baseFeeGwei": 0.005,
              "costStandard": {
                "swap": {
                  "usd": 0.00296,
                  "native": 0.000001098
                },
                "erc20Transfer": {
                  "usd": 0.00107,
                  "native": 3.965e-7
                },
                "nativeTransfer": {
                  "usd": 0.00035,
                  "native": 1.281e-7
                }
              },
              "gasUsedRatio": 0.089,
              "nativeSymbol": "ETH",
              "priorityFeeGwei": {
                "fast": 0.00292,
                "slow": 0,
                "standard": 0.0011
              },
              "maxFeePerGasGwei": {
                "fast": 0.01292,
                "slow": 0.01,
                "standard": 0.0111
              }
            },
            {
              "note": "L2 execution cost only; the rollup adds a small L1 data fee per tx",
              "block": 512172634,
              "chain": "arbitrum",
              "nativeUsd": 2696.88,
              "baseFeeGwei": 0.020016,
              "costStandard": {
                "swap": {
                  "usd": 0.00972,
                  "native": 0.00000360288
                },
                "erc20Transfer": {
                  "usd": 0.00351,
                  "native": 0.00000130104
                },
                "nativeTransfer": {
                  "usd": 0.00113,
                  "native": 4.20336e-7
                }
              },
              "gasUsedRatio": 0.08,
              "nativeSymbol": "ETH",
              "priorityFeeGwei": {
                "fast": 0,
                "slow": 0,
                "standard": 0
              },
              "maxFeePerGasGwei": {
                "fast": 0.040032,
                "slow": 0.040032,
                "standard": 0.040032
              }
            },
            {
              "block": 95043353,
              "chain": "polygon",
              "nativeUsd": 0.10899,
              "baseFeeGwei": 246.188,
              "costStandard": {
                "swap": {
                  "usd": 0.0065,
                  "native": 0.0596496
                },
                "erc20Transfer": {
                  "usd": 0.00235,
                  "native": 0.0215401
                },
                "nativeTransfer": {
                  "usd": 0.00076,
                  "native": 0.00695912
                }
              },
              "gasUsedRatio": 0.178,
              "nativeSymbol": "POL",
              "priorityFeeGwei": {
                "fast": 288.274,
                "slow": 30,
                "standard": 85.1987
              },
              "maxFeePerGasGwei": {
                "fast": 780.65,
                "slow": 522.376,
                "standard": 577.574
              }
            },
            {
              "note": "Per-slot minimum priority fees paid by txs touching the busiest SOL/USDC pool over the last ~150 slots (a swap-competitive estimate); 1 signature",
              "slot": 453828503,
              "chain": "solana",
              "nativeUsd": 119.7404,
              "sampleSlots": 150,
              "nativeSymbol": "SOL",
              "costFor200kCu": {
                "fast": {
                  "sol": 0.000005,
                  "usd": 0.0006
                },
                "slow": {
                  "sol": 0.000005,
                  "usd": 0.0006
                },
                "standard": {
                  "sol": 0.000005,
                  "usd": 0.0006
                }
              },
              "baseFeeLamportsPerSignature": 5000,
              "priorityFeeMicroLamportsPerCu": {
                "fast": 0,
                "slow": 0,
                "standard": 0
              }
            }
          ],
          "latencyMs": 940,
          "generatedAt": "2026-10-06T07:03:03.088Z",
          "cheapestEvmForErc20Transfer": "base"
        }
      }
    },
    "schema": {
      "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",
              "properties": {
                "chain": {
                  "enum": [
                    "all",
                    "ethereum",
                    "base",
                    "arbitrum",
                    "polygon",
                    "solana"
                  ],
                  "type": "string",
                  "description": "One chain or all (default)"
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "required": [
                "chains"
              ],
              "properties": {
                "chains": {
                  "type": "array",
                  "items": {
                    "type": "object",
                    "properties": {
                      "chain": {
                        "type": "string"
                      },
                      "baseFeeGwei": {
                        "type": "number"
                      },
                      "costStandard": {
                        "type": "object"
                      },
                      "priorityFeeGwei": {
                        "type": "object"
                      }
                    }
                  }
                },
                "generatedAt": {
                  "type": "string"
                },
                "cheapestEvmForErc20Transfer": {
                  "type": [
                    "string",
                    "null"
                  ]
                }
              }
            }
          }
        }
      }
    }
  },
  "builder-code": {
    "info": {
      "a": "bc_rdtmtdd1"
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "a": {
          "type": "string",
          "pattern": "^[a-z0-9_]{1,32}$",
          "description": "App builder code"
        },
        "s": {
          "type": "array",
          "items": {
            "type": "string",
            "pattern": "^[a-z0-9_]{1,32}$"
          },
          "maxItems": 11,
          "description": "Service builder codes"
        },
        "w": {
          "type": "string",
          "pattern": "^[a-z0-9_]{1,32}$",
          "description": "Wallet builder code"
        }
      },
      "additionalProperties": false
    }
  }
}

Provenance

Seen in the source catalog
2026-10-18 22:42Z
Last indexed by Roundhouse
2026-10-23 21:40Z
Last enriched (probe, favicon, geo)
2026-10-05 09:45Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 402
Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 21 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service Gas Price and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Gas%20Price'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://x402-seller-pmlm.onrender.com/gas, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.