# Requires: npm i -g @infinite_dev/cli && export INFINITE_API_KEY=sk_sandbox_...
# Escape hatch for any endpoint: infinite api <METHOD> <path>
infinite api POST /v1/fx/quotes \
  --body '<request-json>'

Create a firm FX quote.

# Infinite MCP is read-only for this endpoint — use a dedicated MCP tool when one exists, otherwise run the CLI tab.

import requests

url = "https://sandbox.api.infinite.dev/v1/fx/quotes"

payload = {
    "onBehalfOf": "cus_abc123",
    "pair": {
        "sourceCurrency": "USDT",
        "destinationCurrency": "USDC",
        "sourceNetwork": "BASE",
        "sourceRail": "SEPA",
        "destinationNetwork": "BASE",
        "destinationRail": "SEPA"
    },
    "amount": {
        "value": "10000000",
        "side": "SOURCE"
    },
    "maxSlippageBps": 25
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    onBehalfOf: 'cus_abc123',
    pair: {
      sourceCurrency: 'USDT',
      destinationCurrency: 'USDC',
      sourceNetwork: 'BASE',
      sourceRail: 'SEPA',
      destinationNetwork: 'BASE',
      destinationRail: 'SEPA'
    },
    amount: {value: '10000000', side: 'SOURCE'},
    maxSlippageBps: 25
  })
};

fetch('https://sandbox.api.infinite.dev/v1/fx/quotes', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://sandbox.api.infinite.dev/v1/fx/quotes",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'onBehalfOf' => 'cus_abc123',
    'pair' => [
        'sourceCurrency' => 'USDT',
        'destinationCurrency' => 'USDC',
        'sourceNetwork' => 'BASE',
        'sourceRail' => 'SEPA',
        'destinationNetwork' => 'BASE',
        'destinationRail' => 'SEPA'
    ],
    'amount' => [
        'value' => '10000000',
        'side' => 'SOURCE'
    ],
    'maxSlippageBps' => 25
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://sandbox.api.infinite.dev/v1/fx/quotes"

	payload := strings.NewReader("{\n  \"onBehalfOf\": \"cus_abc123\",\n  \"pair\": {\n    \"sourceCurrency\": \"USDT\",\n    \"destinationCurrency\": \"USDC\",\n    \"sourceNetwork\": \"BASE\",\n    \"sourceRail\": \"SEPA\",\n    \"destinationNetwork\": \"BASE\",\n    \"destinationRail\": \"SEPA\"\n  },\n  \"amount\": {\n    \"value\": \"10000000\",\n    \"side\": \"SOURCE\"\n  },\n  \"maxSlippageBps\": 25\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://sandbox.api.infinite.dev/v1/fx/quotes")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"onBehalfOf\": \"cus_abc123\",\n  \"pair\": {\n    \"sourceCurrency\": \"USDT\",\n    \"destinationCurrency\": \"USDC\",\n    \"sourceNetwork\": \"BASE\",\n    \"sourceRail\": \"SEPA\",\n    \"destinationNetwork\": \"BASE\",\n    \"destinationRail\": \"SEPA\"\n  },\n  \"amount\": {\n    \"value\": \"10000000\",\n    \"side\": \"SOURCE\"\n  },\n  \"maxSlippageBps\": 25\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://sandbox.api.infinite.dev/v1/fx/quotes")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"onBehalfOf\": \"cus_abc123\",\n  \"pair\": {\n    \"sourceCurrency\": \"USDT\",\n    \"destinationCurrency\": \"USDC\",\n    \"sourceNetwork\": \"BASE\",\n    \"sourceRail\": \"SEPA\",\n    \"destinationNetwork\": \"BASE\",\n    \"destinationRail\": \"SEPA\"\n  },\n  \"amount\": {\n    \"value\": \"10000000\",\n    \"side\": \"SOURCE\"\n  },\n  \"maxSlippageBps\": 25\n}"

response = http.request(request)
puts response.read_body

{
  "id": "quote_abc123",
  "pair": {
    "sourceCurrency": "USDT",
    "destinationCurrency": "USDC",
    "sourceNetwork": "BASE",
    "sourceRail": "SEPA",
    "destinationNetwork": "BASE",
    "destinationRail": "SEPA"
  },
  "amount": {
    "value": "10000000",
    "side": "SOURCE"
  },
  "grossSource": "10000000",
  "displayedDestination": "9998500",
  "rate": "0.9998500",
  "expiresAt": "2026-05-26T19:42:00.000Z",
  "referenceRate": "1.158691536019208779",
  "referenceRateAsOf": "2026-09-02T18:30:04.000Z",
  "referenceProvider": "XE",
  "quoteBinding": "PERSISTED",
  "expectedDepositDetails": {
    "kind": "CRYPTO_ADDRESS",
    "note": "Deposit instructions become active only when the trade created by accepting this quote includes them — immediately on accept, or after the fx_trade.deposit_instructions_ready event if the trade starts in PENDING_WALLET_APPROVAL. Funds sent before then cannot be matched to a trade.",
    "address": "0xCustomerInfiniteTxWallet...",
    "network": "BASE"
  }
}

{
  "message": "fx_quote_amount_too_large",
  "hint": "Amount is above the maximum for this corridor.",
  "limits": {
    "sourceCurrency": "USDC",
    "min": "0",
    "max": "10000000"
  },
  "requested": "100000000"
}