Pay-per-call Base mainnet JSON-RPC, no API key, no account

Pay-per-call Base mainnet JSON-RPC, no API key, no account: GET ?method=eth_call&params=[...] (params = URL-encoded JSON array) or POST a standard JSON-RPC body. POST a batch of up to 10 calls for ONE $0.002 payment (vs $0.005 per call at other x402 RPC gateways). Read + broadcast methods: eth_blockNumber, eth_chainId, eth_call, eth_estimateGas, eth_getBalance, eth_getTransactionCount, eth_getCode, eth_getStorageAt, eth_getTransactionByHash, eth_getTransactionReceipt, eth_getBlockByNumber,...

Answeringour last check, 2026-10-31

1 of 1checks answered this week

868 msmedian answer time

$0.002listed price per call

$0.002price it asked us

Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.

Endpoint

GET https://kr-x402-mvp.kgy5612.workers.dev/crypto/base-rpc

Category	Market data
Provider host	kr-x402-mvp.kgy5612.workers.dev
Networks	eip155:8453
Payment schemes	exact
Self-reported calls, 30 days	1 from 1 payers (the provider's figure, not ours)

Our checks, last 30 days

Day	Result	HTTP	Asked	Time
2026-10-31	valid payment request	402	$0.002	868 ms

Example input (from the provider)

{
  "method": "GET",
  "queryParams": {
    "method": "eth_blockNumber",
    "params": "[]"
  },
  "type": "http"
}

Promised output schema (from the provider)

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "method": {
          "enum": [
            "GET"
          ],
          "type": "string"
        },
        "queryParams": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "description": "JSON-RPC method (default eth_blockNumber)",
              "examples": [
                "eth_blockNumber",
                "eth_getBalance",
                "eth_call"
              ],
              "type": "string"
            },
            "params": {
              "description": "URL-encoded JSON array of params (default [])",
              "examples": [
                "[]",
                "[\"0xe4be4d0bd82d8e68203deff81f79ede0529f2617\",\"latest\"]"
              ],
              "type": "string"
            }
          },
          "type": "object"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "method"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "example": {
          "type": "object"
        },
        "type": {
          "type": "string"
        }
      },
      "required": [
        "type"
      ],
      "type": "object"
    }
  },
  "required": [
    "input"
  ],
  "type": "object"
}

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