scvd.store
An evidence observatory for agentic commerce: preflight an x402 door before paying, free conformance checks on the signed receipt after, a Bitcoin-anchored corpus over time. USDC on Base, Polygon,…
First seen 2026-09-07 · Last seen 2026-09-14 · Source: webmcp.com
Answer 5 · Act 3 · Transact 0 · Score: Not yet scored
Tool inspector
check_before_you_pay
Probes one x402 door unpaid and replays the stock @x402/core client selection over the accepts it returned, under the caller's own profile. Returns which accept a stock client would sign — network, asset, amount, signing window — or that it would refuse locally before signing, with the stage and the setting that decided it. Free; nothing is signed and nothing is paid.
Page: /
Input schema
| Property | Type | Required | Description |
|---|---|---|---|
url |
string | yes | The https x402 door you are about to pay. |
client_profile |
object | no | The caller's own x402 client settings. Absent, the replay runs against a client configured with nothing, the case that loses money quietly. |
Raw JSON schema
{
"type": "object",
"properties": {
"url": {
"type": "string",
"description": "The https x402 door you are about to pay.",
"maxLength": 2048
},
"client_profile": {
"type": "object",
"description": "The caller's own x402 client settings. Absent, the replay runs against a client configured with nothing, the case that loses money quietly.",
"properties": {
"max_amount_per_payment_usd": {
"type": [
"number",
"boolean"
],
"description": "Your spendControls.maxAmountPerPayment, in dollars; false if you set it to false."
},
"spend_controls_disabled": {
"type": "boolean",
"description": "True if you pass spendControls: false — the one escape from the whole filter."
}
},
"additionalProperties": false
}
},
"required": [
"url"
],
"additionalProperties": false,
"examples": [
{
"url": "https://example.com/api/paid-answer"
},
{
"url": "https://example.com/api/paid-answer",
"client_profile": {
"max_amount_per_payment_usd": 1
}
}
]
}
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