Roundhouse

Ontario Protocol

What does a Base transaction cost right now? Base fee, priority-fee p25/p50/p90 over the last 20 blocks, suggested maxFeePerGas and maxPriorityFeePerGas for slow, normal and fast inclusion, an L1 data-fee upper bound, and estimated total cost in wei for an ETH transfer and an ERC-20 transfer, read live from Base RPC with the block number. $0.0015 USDC on Base. Failed read, no charge. No account, no API key. Estimates, not inclusion guarantees. By Ontario Protocol.

TradingLiveeip155:8453Exactvia cdp
https://ontarioprotocol.com/api/x402/base/gas
Base gas priceGas fee estimateMaxFeePerGasBase
Settlements · 30d
12
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$10.33
Verified settled volume
33 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0015
Listed price
As published in the catalog. Always read the live 402 before paying.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-10-26 01:14Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xa2d72aBF2C5e939fdDCA4156B74dE482e03CA3ec

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.

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2",
        "quote_id": "4f93fd70f46c4cc0a69e687dc5070294",
        "resourceUrl": "https://ontarioprotocol.com/api/x402/base/gas",
        "quote_expires_at": 1793017259
      },
      "payTo": "0xa2d72aBF2C5e939fdDCA4156B74dE482e03CA3ec",
      "amount": "1500",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "quote_id": "4f93fd70f46c4cc0a69e687dc5070294",
  "resource": {
    "url": "https://ontarioprotocol.com/api/x402/base/gas",
    "tags": [
      "base gas price",
      "gas fee estimate",
      "maxFeePerGas",
      "base"
    ],
    "iconUrl": "https://ontarioprotocol.com/static/ontario-logo-192.png",
    "mimeType": "application/json",
    "description": "What does a Base transaction cost right now? Base fee, priority-fee p25/p50/p90 over the last 20 blocks, suggested maxFeePerGas and maxPriorityFeePerGas for slow, normal and fast inclusion, an L1 data-fee upper bound, and estimated total cost in wei for an ETH transfer and an ERC-20 transfer, read live from Base RPC with the block number. $0.0015 USDC on Base. Failed read, no charge. No account, no API key. Estimates, not inclusion guarantees. By Ontario Protocol.",
    "serviceName": "Ontario Protocol"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "blocks": 20
          }
        },
        "output": {
          "example": {
            "note": "Estimates, not inclusion guarantees. Wei amounts are decimal strings.",
            "block": 53049909,
            "schema": "ontario.base_gas.v1",
            "source": "Base RPC",
            "network": "eip155:8453",
            "read_at": "2026-10-25T00:46:05Z",
            "suggested": {
              "fast": {
                "max_fee_per_gas": "15800000",
                "max_priority_fee_per_gas": "5800000"
              },
              "slow": {
                "max_fee_per_gas": "11000000",
                "max_priority_fee_per_gas": "1000000"
              },
              "normal": {
                "max_fee_per_gas": "11000000",
                "max_priority_fee_per_gas": "1000000"
              }
            },
            "assumptions": {
              "base_fee": "base fee of the next block",
              "blocks_sampled": 20,
              "max_fee_formula": "2 * base_fee + priority_fee",
              "estimate_formula": "gas * (base_fee + p50 tip) + L1 data-fee upper bound",
              "eth_transfer_gas": 21000,
              "erc20_transfer_gas": 65000,
              "priority_fee_method": "median across the sampled blocks of each block's gas-weighted 25th, 50th and 90th percentile tip (eth_feeHistory)",
              "eth_transfer_unsigned_tx_bytes": 110,
              "erc20_transfer_unsigned_tx_bytes": 175
            },
            "base_fee_wei": "5000000",
            "priority_fee_wei": {
              "p25": "1000000",
              "p50": "1000000",
              "p90": "5800000"
            },
            "estimated_total_wei": {
              "eth_transfer": "126389167165",
              "erc20_transfer": "390565949161"
            },
            "l1_fee_upper_bound_wei": {
              "eth_transfer": "389167165",
              "erc20_transfer": "565949161"
            },
            "estimate_includes_l1_fee": true
          }
        }
      },
      "schema": {
        "type": "object",
        "required": [
          "input",
          "output"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "queryParams"
            ],
            "properties": {
              "queryParams": {
                "type": "object",
                "properties": {
                  "blocks": {
                    "type": "integer",
                    "default": 20,
                    "maximum": 50,
                    "minimum": 5,
                    "description": "Optional number of recent blocks the fee percentiles cover, 5 to 50. Default 20."
                  }
                },
                "additionalProperties": false
              }
            }
          },
          "output": {
            "type": "object",
            "required": [
              "example"
            ],
            "properties": {
              "example": {
                "type": "object",
                "additionalProperties": true
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Accepts

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

0.0015USDC≈ $0.0015 USD
on Base · exact scheme

Pay 0.0015 USDC on Base to 0xa2d7…CA3ec. The signed payment is good for 5 minutes.

Paid to
0xa2d7…CA3ec
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
1500 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2",
      "quote_id": "8b6df97975c44cceb7a0e8bea753cb86",
      "resourceUrl": "https://ontarioprotocol.com/api/x402/base/gas",
      "quote_expires_at": 1792977591
    },
    "payTo": "0xa2d72aBF2C5e939fdDCA4156B74dE482e03CA3ec",
    "amount": "1500",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "blocks": 20
        }
      },
      "output": {
        "example": {
          "note": "Estimates, not inclusion guarantees. Wei amounts are decimal strings.",
          "block": 53049909,
          "schema": "ontario.base_gas.v1",
          "source": "Base RPC",
          "network": "eip155:8453",
          "read_at": "2026-10-25T00:46:05Z",
          "suggested": {
            "fast": {
              "max_fee_per_gas": "15800000",
              "max_priority_fee_per_gas": "5800000"
            },
            "slow": {
              "max_fee_per_gas": "11000000",
              "max_priority_fee_per_gas": "1000000"
            },
            "normal": {
              "max_fee_per_gas": "11000000",
              "max_priority_fee_per_gas": "1000000"
            }
          },
          "assumptions": {
            "base_fee": "base fee of the next block",
            "blocks_sampled": 20,
            "max_fee_formula": "2 * base_fee + priority_fee",
            "estimate_formula": "gas * (base_fee + p50 tip) + L1 data-fee upper bound",
            "eth_transfer_gas": 21000,
            "erc20_transfer_gas": 65000,
            "priority_fee_method": "median across the sampled blocks of each block's gas-weighted 25th, 50th and 90th percentile tip (eth_feeHistory)",
            "eth_transfer_unsigned_tx_bytes": 110,
            "erc20_transfer_unsigned_tx_bytes": 175
          },
          "base_fee_wei": "5000000",
          "priority_fee_wei": {
            "p25": "1000000",
            "p50": "1000000",
            "p90": "5800000"
          },
          "estimated_total_wei": {
            "eth_transfer": "126389167165",
            "erc20_transfer": "390565949161"
          },
          "l1_fee_upper_bound_wei": {
            "eth_transfer": "389167165",
            "erc20_transfer": "565949161"
          },
          "estimate_includes_l1_fee": true
        }
      }
    },
    "schema": {
      "type": "object",
      "required": [
        "input",
        "output"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "queryParams"
          ],
          "properties": {
            "queryParams": {
              "type": "object",
              "properties": {
                "blocks": {
                  "type": "integer",
                  "default": 20,
                  "maximum": 50,
                  "minimum": 5,
                  "description": "Optional number of recent blocks the fee percentiles cover, 5 to 50. Default 20."
                }
              },
              "additionalProperties": false
            }
          }
        },
        "output": {
          "type": "object",
          "required": [
            "example"
          ],
          "properties": {
            "example": {
              "type": "object",
              "additionalProperties": true
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-10-26 01:14Z
Last indexed by Roundhouse
2026-10-26 17:20Z
Last enriched (probe, favicon, geo)
2026-10-26 12:15Z
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

No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. 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 Ontario Protocol 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=Ontario%20Protocol'
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://ontarioprotocol.com/api/x402/base/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.