Check that converted amounts follow from the rates supplied
Check that converted amounts follow from the rates supplied. The converted figure is the exact product rounded once to the target currency minor unit under the stated mode, and a difference is reported with its exact size, because one unit is a rounding choice and a thousand is a wrong rate. Also reports two rates for one pair on one date, which means two sources.
Answeringour last check, 2026-10-04
1 of 1checks answered this week
5841 msmedian answer time
$0.16listed price per call
$0.16price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://api.zfinia.com/x402/v1/fx-conversion-consistency-audit
| Category | Code and developer |
|---|---|
| Provider host | api.zfinia.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-04 | valid payment request | 402 | $0.16 | 5841 ms |
Example input (from the provider)
{
"body": {
"conversions": [
{
"from_amount": "1000.00",
"from_currency": "AUD",
"id": "FX-1",
"on": "2026-09-30",
"rate": "0.655",
"to_amount": "655.00",
"to_currency": "USD"
},
{
"from_amount": "500.00",
"from_currency": "AUD",
"id": "FX-2",
"on": "2026-09-30",
"rate": "0.657",
"to_amount": "328.50",
"to_currency": "USD"
},
{
"from_amount": "100.00",
"from_currency": "AUD",
"id": "FX-3",
"on": "2026-09-30",
"rate": "0.655",
"to_amount": "65.49",
"to_currency": "USD"
},
{
"from_amount": "100.00",
"from_currency": "AUD",
"id": "FX-4",
"on": "2026-09-30",
"rate": "96.505",
"to_amount": "9650.50",
"to_currency": "JPY"
}
],
"policy": {
"require_one_rate_per_pair": true,
"rounding": "half_up"
}
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"conversions": {
"items": {
"additionalProperties": false,
"properties": {
"from_amount": {
"type": [
"string",
"number"
]
},
"from_currency": {
"maxLength": 8,
"type": "string"
},
"id": {
"maxLength": 128,
"type": "string"
},
"on": {
"maxLength": 32,
"type": "string"
},
"rate": {
"type": [
"string",
"number"
]
},
"to_amount": {
"type": [
"string",
"number"
]
},
"to_currency": {
"maxLength": 8,
"type": "string"
}
},
"required": [
"from_currency",
"to_currency",
"from_amount",
"to_amount",
"rate"
],
"type": "object"
},
"maxItems": 20000,
"minItems": 1,
"type": "array"
},
"policy": {
"additionalProperties": false,
"properties": {
"minor_units": {
"type": "object"
},
"require_one_rate_per_pair": {
"type": "boolean"
},
"rounding": {
"enum": [
"half_up",
"half_even",
"down",
"up"
],
"type": "string"
}
},
"type": "object"
}
},
"required": [
"conversions"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}