preflight-guard
One-call pre-transaction guard for agents: bundle the transaction you're about to sign/send and get every applicable safety check in a single payment — signature-intent decode, live threat-DB + address-poisoning look-alike on the recipient, and a drainer audit of standing approvals. By design no combined safe/danger verdict is emitted; each sub-check's flags & evidence come back verbatim so your agent decides. Replaces 4 separate 402 round-trips with 1. Deterministic, no LLM.
InferenceLiveeip155:8453Exactvia cdp
SecurityWalletPreflightTransaction-safetyBundle
Settlements · 30d
153↓ 9.1%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$4.93
Verified settled volume
326 settlements proven x402 by their on-chain EIP-3009 marker.
$0.020
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 2026-07-20 08:50Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xD617a7145ca56E3ed58d639F9DEC6999B22441eEThe 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.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.02USDC≈ $0.02 USD
on Base · exact scheme
Pay 0.02 USDC on Base to 0xD617…441eE. The signed payment is good for 5 minutes.
- Paid to
- 0xD617…441eE
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 20000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xD617a7145ca56E3ed58d639F9DEC6999B22441eE",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"approvals": [
{
"token": "0x4200000000000000000000000000000000000006",
"spender": "0xdeadbeef00000000000000000000000000000001",
"allowance": "1461501637330902918203684832716283019655932542975"
}
],
"recipient": "0x1234aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa5678",
"typedData": {
"domain": {
"name": "Permit2",
"chainId": 8453,
"verifyingContract": "0x000000000022D473030F116dDEE9F6B43aC78BA3"
},
"message": {
"details": {
"nonce": "0",
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "1461501637330902918203684832716283019655932542975",
"expiration": "1781176678"
},
"spender": "0x66a9893cC07D91D95644AEDD05D03f95e1dBA8Af",
"sigDeadline": "1749722278"
},
"primaryType": "PermitSingle"
},
"known_addresses": [
"0x1234bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb5678"
]
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"checks": [
{
"ran": true,
"check": "sign-decode",
"result": {
"intent": "grant_allowance",
"action_hint": "ask_for_confirmation",
"spender_known": "Uniswap Universal Router v2"
},
"flagged": true,
"risk_flags": [
"unlimited_allowance"
]
},
{
"ran": true,
"check": "approval-risk",
"result": {
"summary": {
"revoke_now": 1
}
},
"flagged": true,
"risk_flags": [
"dangerous_approval_present"
]
},
{
"ran": true,
"check": "recipient-check",
"result": {
"verdict": "not_in_threat_db",
"action_hint": "no_known_threat"
},
"flagged": false,
"risk_flags": []
},
{
"ran": true,
"check": "address-poison-check",
"result": {
"verdict": "looks_unique"
},
"flagged": false,
"risk_flags": []
}
],
"ledger": {
"threat_db_size": 290,
"threat_db_updated_at": 1719500000
},
"schema": "preflight/v1",
"network": "eip155:8453",
"all_flags": [
"unlimited_allowance",
"dangerous_approval_present"
],
"checks_run": 4,
"confidence": 1,
"checks_flagged": 2
}
}
},
"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": {
"type": "object",
"properties": {
"calldata": {
"type": "string",
"description": "0x-prefixed transaction calldata to decode (alternative to typedData)"
},
"approvals": {
"type": "array",
"items": {
"type": "object",
"required": [
"spender",
"allowance"
],
"properties": {
"token": {
"type": "string"
},
"spender": {
"type": "string"
},
"allowance": {
"type": "string"
}
}
},
"description": "standing approvals to audit"
},
"recipient": {
"type": "string",
"description": "0x EVM address you are about to send to"
},
"typedData": {
"type": "object",
"description": "EIP-712 typed data (domain/primaryType/message) to decode"
},
"known_addresses": {
"type": "array",
"items": {
"oneOf": [
{
"type": "string"
},
{
"type": "object",
"required": [
"address"
],
"properties": {
"label": {
"type": "string"
},
"address": {
"type": "string"
}
}
}
]
},
"description": "your trusted counterparties (for look-alike detection)"
}
},
"description": "One-call pre-transaction guard: bundle everything about a transaction you're about to sign/send and get every applicable safety check back in a single 402 payment. Pass any subset of: typedData (EIP-712) or calldata (0x) -> signature intent decode; recipient (+known_addresses) -> live threat-DB + address-poisoning look-alike; approvals[] -> standing-approval drainer audit. By design NO combined safe/danger verdict is emitted — each sub-check's flags & evidence are returned verbatim so YOUR agent decides. Deterministic, no LLM, evidence-backed."
},
"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"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-07-20 08:50Z
- Last indexed by Roundhouse
- 2026-08-04 03:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-10 07:45Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 404
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 preflight-guard 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=preflight-guard' 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://x402.dailyelo.com/v1/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.