Safelisted read-only JSON-RPC proxy across major EVM chains (base, ethereum, pol
Safelisted read-only JSON-RPC proxy across major EVM chains (base, ethereum, polygon, arbitrum, optimism) — eth_call, eth_getBalance, eth_getTransactionReceipt, eth_getBlockByNumber, and more
Answeringour last check, 2026-09-24
1 of 1checks answered this week
314 msmedian answer time
$0.003listed price per call
$0.003price 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://x402tap.com/api/rpc
| Category | Market data |
|---|---|
| Provider host | x402tap.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| 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 |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.003 | 314 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"chain": "base",
"method": "eth_getBalance",
"params": "[\"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045\",\"latest\"]"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"chain": {
"description": "Chain to query: base, ethereum, polygon, arbitrum, optimism (default base)",
"type": "string"
},
"method": {
"description": "Read-only JSON-RPC method name, e.g. eth_getBalance, eth_call, eth_blockNumber",
"type": "string"
},
"params": {
"description": "JSON-encoded array of RPC params, e.g. [\"0xabc...\",\"latest\"] (default [])",
"type": "string"
}
},
"required": [
"method"
],
"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"
}