Official US Treasury reporting rates of exchange — government FX reference rates
Official US Treasury reporting rates of exchange — government FX reference rates for ~170 currencies, in units of foreign currency per 1 USD, for the latest quarter. Use for accounting-grade and exotic-currency conversion the market /api/v1/forex feed lacks. Filter with `?currency=Euro`. Updated quarterly. From the US Treasury (FiscalData). From x402stock
Answeringour last check, 2026-09-24
1 of 1checks answered this week
310 msmedian answer time
$0.02listed price per call
$0.02price 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
GET https://x402stock.xyz/api/v1/exchange-rates
| Category | Market data |
|---|---|
| Provider host | x402stock.xyz |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.02 | 310 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"currency": "Euro"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"additionalProperties": false,
"properties": {
"currency": {
"maxLength": 64,
"minLength": 1,
"type": "string"
}
},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"additionalProperties": false,
"properties": {
"as_of": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"count": {
"type": "number"
},
"note": {
"type": "string"
},
"rates": {
"items": {
"additionalProperties": false,
"properties": {
"country": {
"type": "string"
},
"country_currency": {
"type": "string"
},
"currency": {
"type": "string"
},
"effective_date": {
"type": "string"
},
"exchange_rate": {
"anyOf": [
{
"type": "number"
},
{
"type": "null"
}
]
}
},
"required": [
"country",
"currency",
"country_currency",
"exchange_rate",
"effective_date"
],
"type": "object"
},
"type": "array"
},
"record_date": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"series": {
"type": "string"
},
"source": {
"const": "us_treasury",
"type": "string"
}
},
"required": [
"source",
"as_of",
"series",
"note",
"record_date",
"count",
"rates"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}