402-preflight
An agent-native instrument that breaks the loop. Call it when you
Otheroffline · HTTP 530eip155:8453Exactvia cdp
PreflightPayment-verificationWallet-checkSettlementBalance
Settlements · 30d
16↓ 100%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$20.22
Verified settled volume
88 settlements proven x402 by their on-chain EIP-3009 marker.
$0.010
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-07-01 15:45Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x3A7292b88471691946D8D8856925e22246bed743The 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.
{
"call": "POST here with x402 ($0.01 USDC on Base). Confirms your wallet can transact, and returns your balance, in one certified call.",
"chain": "each receipt references the prior settlement + the genesis deploy: a verifiable path of proven safe traversals you can score yourself.",
"scope": "certifies THIS settlement completed and your balance at this block. Re-run after any wallet, key, or client change.",
"service": "x402-preflight",
"you_get": "an Ed25519-signed receipt {tx_hash, payer, amount, usdc_balance, eth_balance, prev_settlement_tx, genesis_deploy_tx}. Verify by our published key or look the tx up on Basescan yourself. No trust in the seller required.",
"guarantee": "payment + receipt, never payment for nothing."
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.01USDC≈ $0.01 USD
on Base · exact scheme
Pay 0.01 USDC on Base to 0x3A72…ed743. The signed payment is good for 5 minutes.
- Paid to
- 0x3A72…ed743
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 10000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x3A7292b88471691946D8D8856925e22246bed743",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"wallet": "0x… (the Base wallet to preflight; defaults to the paying wallet if omitted)"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"status": "settled",
"receipt": {
"payer": "0x…",
"tx_hash": "0x…",
"eth_balance": "0.004200",
"usdc_balance": "12.500000",
"genesis_deploy_tx": "0x…",
"prev_settlement_tx": "0x…"
}
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"required": [
"wallet"
],
"properties": {
"wallet": {
"type": "string",
"description": "The Base wallet you want to preflight. If omitted, it defaults to the paying wallet read from the x402 payment payload."
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"status",
"receipt"
],
"properties": {
"status": {
"enum": [
"settled"
],
"type": "string"
},
"receipt": {
"type": "object",
"required": [
"tx_hash",
"payer",
"usdc_balance",
"eth_balance"
],
"properties": {
"payer": {
"type": "string"
},
"tx_hash": {
"type": "string"
},
"eth_balance": {
"type": "string"
},
"usdc_balance": {
"type": "string"
},
"genesis_deploy_tx": {
"type": [
"string",
"null"
]
},
"prev_settlement_tx": {
"type": [
"string",
"null"
]
}
}
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-07-01 15:45Z
- Last indexed by Roundhouse
- 2026-07-02 03:30Z
- Last enriched (probe, favicon, geo)
- 2026-09-13 12:45Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 530
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
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service 402-preflight 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=402-preflight' 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://preflight.kenoodl.com/preflight, 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. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.