kr-x402-mvp.kgy5612.workers.dev

Recent payments · which agents last used it

Every indexed settlement paid to this service’s wallet, newest first. The index does not record which endpoint a payment was for, so if this wallet serves more than one endpoint, the rows include payments for the others. Paged up to the newest 5,000; the full history is on the merchant page.

Live 402 challenge

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

{
  "next": [
    "https://kr-x402-mvp.kgy5612.workers.dev/api/v1/perpetuals/volume?limit=5&min_volume_usd=1000000",
    "https://kr-x402-mvp.kgy5612.workers.dev/api/v1/nofx/funding-rate/low?limit=20&min_volume_usd=1000000",
    "https://kr-x402-mvp.kgy5612.workers.dev/api/usd-price?symbols=BTC,ETH,SOL",
    "https://kr-x402-mvp.kgy5612.workers.dev/crypto/hl-book?coin=ETH",
    "https://kr-x402-mvp.kgy5612.workers.dev/crypto/funding-signal?symbol=BTC"
  ],
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xe4be4d0bd82d8e68203deff81f79ede0529f2617",
      "amount": "1000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 900
    }
  ],
  "catalog": "https://kr-x402-mvp.kgy5612.workers.dev/catalog",
  "example": "https://kr-x402-mvp.kgy5612.workers.dev/api/v1/perpetuals/volume?limit=5&min_volume_usd=1000000",
  "openapi": "https://kr-x402-mvp.kgy5612.workers.dev/openapi.json",
  "resource": {
    "url": "https://kr-x402-mvp.kgy5612.workers.dev/crypto/base-gas",
    "tags": [
      "gas",
      "gas-oracle",
      "gas-price",
      "eip-1559",
      "fee-estimate",
      "maxFeePerGas",
      "onchain",
      "evm",
      "transaction",
      "l2",
      "crypto",
      "base"
    ],
    "mimeType": "application/json",
    "description": "Base gas oracle for agents sending Base txs: EIP-1559 slow / standard / fast tiers (maxFeePerGas + maxPriorityFeePerGas in gwei and wei hex, from eth_feeHistory 20 blocks p10/p50/p90), base fee, congestion 0-1, recommended_tier, ready-to-sign tx_fields, and est. cost in ETH + USD for your gas_limit (default 21000; use 65000 for an ERC-20 transfer). Cheapest paid call ($0.001).",
    "serviceName": "Crypto Microdata for Agents"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "gas_limit": 21000
          }
        },
        "output": {
          "type": "json",
          "example": {
            "block": 37000000,
            "chain": "base",
            "tiers": {
              "fast": {
                "est_cost_usd": 0.0007,
                "max_fee_gwei": 0.025,
                "max_priority_fee_gwei": 0.01
              },
              "slow": {
                "est_cost_usd": 0.0005,
                "max_fee_gwei": 0.006,
                "max_priority_fee_gwei": 0.001
              },
              "standard": {
                "est_cost_usd": 0.0005,
                "max_fee_gwei": 0.011,
                "max_priority_fee_gwei": 0.001
              }
            },
            "sources": [
              "https://mainnet.base.org"
            ],
            "chain_id": 8453,
            "tx_fields": {
              "gas": "0x5208",
              "type": "0x2",
              "maxFeePerGas": "0xa7d8c0",
              "maxPriorityFeePerGas": "0xf4240"
            },
            "congestion": 0.42,
            "updated_at": "2026-10-29T13:30:00Z",
            "base_fee_gwei": 0.005,
            "gas_price_gwei": 0.006,
            "recommended_tier": "standard",
            "gas_price_wei_hex": "0x5b8d80",
            "est_transfer_cost_eth": 1.26e-7,
            "max_priority_fee_gwei": 0.001,
            "max_priority_fee_wei_hex": "0xf4240"
          }
        }
      },
      "schema": {
        "type": "object",
        "$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": {
                  "gas_limit": {
                    "type": "integer",
                    "maximum": 30000000,
                    "minimum": 21000,
                    "examples": [
                      21000,
                      150000
                    ],
                    "description": "Gas units to price (default 21000)"
                  }
                },
                "additionalProperties": false
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "how_to_pay": "Sign the accepts[0] USDC EIP-3009 authorization on Base and retry this exact URL with header PAYMENT-SIGNATURE (x402 v2). GET and POST are the same price; HEAD only returns this quote. Same terms are in the PAYMENT-REQUIRED header. Failed calls (4xx/5xx) are never charged.",
  "price_usdc": "0.001000",
  "free_sample": "https://kr-x402-mvp.kgy5612.workers.dev/crypto/base-gas?sample=1",
  "x402Version": 2,
  "input_schema": {
    "type": "object",
    "properties": {
      "gas_limit": {
        "type": "integer",
        "maximum": 30000000,
        "minimum": 21000,
        "examples": [
          21000,
          150000
        ],
        "description": "Gas units to price (default 21000)"
      }
    },
    "additionalProperties": false
  },
  "cheapest_first_call": "https://kr-x402-mvp.kgy5612.workers.dev/crypto/ping ($0.001)"
}

Accepts

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

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xe4be4d0bd82d8e68203deff81f79ede0529f2617",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://kr-x402-mvp.kgy5612.workers.dev/crypto/base-gas",
    "description": "",
    "maxAmountRequired": "1000",
    "maxTimeoutSeconds": 300
  }
]

Provenance

Seen in the source catalog

2026-10-30 01:24Z

Last indexed by Roundhouse

2026-11-11 23:46Z

Last enriched (probe, favicon, geo)

2026-11-12 00:15Z

x402 version

1

Max timeout

300s

Liveness probe

HTTP 402