Roundhouse

Base

Returns an Ethereum mainnet block by number or 'latest' via eth_getBlockByNumber. Takes block (a block number, or 'latest'). Base RPC read of a block number.

DataLiveeip155:8453Exactvia cdp
https://ari001.tailb4ac3a.ts.net/v1/ventures/x402_eth_reads_v1/eth_mainnet_eth_get_block_by_number
RpcOnchain-dataEthereum
Calls · 30d
2
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 5 snapshots so far.
$0.79
Verified settled volume
253 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0030
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 2026-10-15 10:53Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x7775dfcF6f8B2A0a4Aa4B50B78eAf88351e4D2f6

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: retry with a PAYMENT-SIGNATURE header built from one of `accepts`"
}

Accepts

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

0.003USDC≈ $0.003 USD
on Base · exact scheme

Pay 0.003 USDC on Base to 0x7775…4D2f6. The signed payment is good for 1 minute.

Paid to
0x7775…4D2f6
USD Coin contract
0x8335…02913
Payment window
1 minute
As published
3000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x7775dfcF6f8B2A0a4Aa4B50B78eAf88351e4D2f6",
    "amount": "3000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "block": "latest"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "ok": true,
          "chain": "ethereum",
          "method": "eth_getBlockByNumber",
          "result": {
            "hash": "0x7538fe3a3bb34856c428edf3a6987a3f65c62e420473a509e0ef6e6446aac74b",
            "size": "0x1d1af",
            "miner": "0x4838b106fce9647bdf1e7877bf73ce8b0bad5f97",
            "nonce": "0x0000000000000000",
            "number": "0x18f1ab8",
            "uncles": [],
            "gasUsed": "0x169e64a",
            "mixHash": "0xae6149f7ce26ec6622dcee60ac3581ec58f376c6e617344d5d26fa6c79fcd84f",
            "gasLimit": "0x3938700",
            "extraData": "0x546974616e2028746974616e6275696c6465722e78797a29",
            "logsBloom": "0x51ef0f6b5db85bb77c3f1b4de1e5dfafd5fedf65f45c753c161735b56e9beff5dc2cc73aa3bc2fafb97e7b917abf7dddc76b513d9f67ef73dfff2ff2bfefe4db7379d7e11ef186fae93b772fb47b47ffeee47771edfe1bba7176649acf657edef630646aa6ce2a61faf7faf32e606cc7dbffc2be70d6b6",
            "stateRoot": "0xafc5c4791f953764c1240c4605600bffa650467910ff793a6ad44a44ec5bcdad",
            "timestamp": "0x6ac905e3",
            "difficulty": "0x0",
            "parentHash": "0x49c6e74104654981bc3d21e12e9df6dcb4fad59c775948d9c43ecc662dbbeebe",
            "sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
            "blobGasUsed": "0x140000",
            "receiptsRoot": "0xd4d60719e4ba28f68eb398a5d861d44bfdb8a171742a756e0dbcc50250136183",
            "requestsHash": "0xe3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
            "baseFeePerGas": "0x206e2cc9",
            "excessBlobGas": "0xc0db577",
            "withdrawalsRoot": "0x58b153ac66ecab07f3a899101e5e839985a01f22419ae16886f5321840808584",
            "transactionsRoot": "0xc00956eb9e6da8da2db4d3a68333bf790f6fb92471b67121666f3a739a0b9e6c",
            "parentBeaconBlockRoot": "0x0a477cb0499fc7f2a7d288b176f58f017ce1fc816648df3df102066289a3a962"
          },
          "service": "x402_chain_reads_v1.eth_getblockbynumber"
        }
      }
    },
    "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",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "properties": {
                "block": {
                  "type": "string",
                  "description": "a block number, or 'latest'"
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-10-15 10:53Z
Last indexed by Roundhouse
2026-10-17 19:10Z
Last enriched (probe, favicon, geo)
2026-10-14 20:46Z
x402 version
2
Max timeout
60s
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. 5 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 Base 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=Base'
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://ari001.tailb4ac3a.ts.net/v1/ventures/x402_eth_reads_v1/eth_mainnet_eth_get_block_by_number, 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.