Base
Base on-chain read: a transaction by its hash. Base eth_getTransactionByHash. Takes hash (transaction hash, 0x + 64 hex) and returns that Base transaction as the node returns it: from, to, value, gas, gas price, input, nonce, block number and transaction index, or null if the node does not know the hash.
The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
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.
Pay 0.003 USDC on Base to 0xBF32…Aa035. The signed payment is good for 1 minute.
- Paid to
- 0xBF32…Aa035
- USD Coin contract
- 0x8335…02913
- Payment window
- 1 minute
- As published
- 3000 smallest units
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0xBF32…Aa035
- Token contract
- 0x3c49…c3359
- Payment window
- 1 minute
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0xBF32…Aa035
- Token contract
- 0xaf88…e5831
- Payment window
- 1 minute
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xBF324F1F5b648a67905A86aF3E1093C667EAa035",
"amount": "3000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 60
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xBF324F1F5b648a67905A86aF3E1093C667EAa035",
"amount": "3000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 60
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xBF324F1F5b648a67905A86aF3E1093C667EAa035",
"amount": "3000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 60
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"hash": "0x6ec0cc1f3124bc3b7f1f070d7c73d9ddb8104f79e2602d8cac4dbaa5f4c68ea9"
}
},
"output": {
"type": "json",
"example": {
"ok": true,
"chain": "base",
"method": "eth_getTransactionByHash",
"result": {
"r": "0x0",
"s": "0x0",
"v": "0x0",
"to": "0x4200000000000000000000000000000000000015",
"gas": "0xf4240",
"from": "0xdeaddeaddeaddeaddeaddeaddeaddeaddead0001",
"hash": "0x6ec0cc1f3124bc3b7f1f070d7c73d9ddb8104f79e2602d8cac4dbaa5f4c68ea9",
"mint": "0x0",
"type": "0x7e",
"input": "0x440a5e20000008dd00101c1200000000000000010000000067a893a300000000014cc642000000000000000000000000000000000000000000000000000000002ef4ebe10000000000000000000000000000000000000000000000000000000000000002b33f335e3b4b340df7b2a9c0ac482043223a17",
"nonce": "0x18f1bb9",
"value": "0x0",
"yParity": "0x0",
"gasPrice": "0x0",
"blockHash": "0xae1326b8087866a6df875ef2388f57a91a16fccc5714e9fa5d66425f7677e7b3",
"sourceHash": "0x41af957a0405b7d317013d73271f2f39554782d4967d4ec6fd39a34fd5ba42bb",
"blockNumber": "0x18f1bb8",
"blockTimestamp": "0x67a89453",
"transactionIndex": "0x0",
"depositReceiptVersion": "0x1"
},
"service": "x402_chain_reads_v1.base_eth_gettransactionbyhash"
}
}
},
"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": {
"hash": {
"type": "string",
"description": "transaction hash, 0x + 64 hex"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-21 21:44Z
- Last indexed by Roundhouse
- 2026-10-24 00:20Z
- Last enriched (probe, favicon, geo)
- 2026-10-17 02:45Z
- x402 version
- 2
- Max timeout
- 60s
- Liveness probe
- HTTP 402
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. 13 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide 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://api.arysphere.com/v1/ventures/x402_chain_reads_v1/base_eth_gettransactionbyhash, 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.