Get FX quote

Quote a conversion between two tokenized fiat balances held inside the user's UR account. Read the minimum and maximum FX amounts from the chain config at request time; do not hardcode them.

post

/api/fma/v1/quote/fx

Authorizations

X-Api-SignaturestringRequired

Partner Auth: EIP-191 signature by the partner's registered backend key, with X-Api-Deadline and optional X-Api-PublicKey headers. See the Signature and verify guide.

Header parameters

X-Api-SignaturestringRequired

0x-prefixed 65-byte hex EIP-191 signature over the Partner Auth message. See the Signature and verify guide.

X-Api-DeadlinestringRequired

Unix seconds. UR rejects the request when the current time is past the deadline. Keep the validity window at or under 5 minutes.

X-Api-PublicKeystringRequired

0x-prefixed partner signer address registered with UR.

X-Ur-IdstringOptional

Send at least one of X-Ur-Id or X-External-User-Id. When both are present, UR resolves the user by X-Ur-Id first.

X-External-User-IdstringOptional

Send at least one of X-Ur-Id or X-External-User-Id. When both are present, UR resolves the user by X-Ur-Id first.

Body

fromCurrencystringRequired

Input fiat currency symbol.

toCurrencystringRequired

Output fiat currency symbol.

inputAmountstringRequired

Input amount as a human-readable decimal string.

Responses

200

Standard envelope. Business errors return HTTP 200 with a non-zero code.

application/json

Standard UR OpenAPI response envelope. code 0 means success; a non-zero code is a business error described by message.

codeintegerRequired

0 on success; non-zero business error code.

messagestringRequired

Human-readable explanation. May be empty on success.

post/api/fma/v1/quote/fx

POST /api/fma/v1/quote/fx HTTP/1.1
Host: openapi.ur.app
X-Api-Signature: text
X-Api-Deadline: text
X-Api-PublicKey: text
Content-Type: application/json
Accept: */*
Content-Length: 59

{
  "fromCurrency": "EUR",
  "toCurrency": "CHF",
  "inputAmount": "5"
}

200

Standard envelope. Business errors return HTTP 200 with a non-zero code.

{
  "code": 0,
  "message": "",
  "data": {
    "inputAmount": "5",
    "fromCurrency": "EUR",
    "toCurrency": "CHF",
    "outputAmount": "4.18",
    "exchangeRate": "0.83"
  }
}