Swap USDC to USDT
curl --request POST \
--url https://api.rach.finance/caas/api/v1/swaps \
--header 'Content-Type: application/json' \
--header 'X-API-Key: <api-key>' \
--data '
{
"amount": "100.00",
"idempotency_key": "swap_ref_001",
"sender_phone": "0xFDd4ABaF518d49A6749A3aD6A68f9403bD93cFF0",
"token_in": "USDC",
"token_out": "USDT"
}
'import requests
url = "https://api.rach.finance/caas/api/v1/swaps"
payload = {
"amount": "100.00",
"idempotency_key": "swap_ref_001",
"sender_phone": "0xFDd4ABaF518d49A6749A3aD6A68f9403bD93cFF0",
"token_in": "USDC",
"token_out": "USDT"
}
headers = {
"X-API-Key": "<api-key>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {'X-API-Key': '<api-key>', 'Content-Type': 'application/json'},
body: JSON.stringify({
amount: '100.00',
idempotency_key: 'swap_ref_001',
sender_phone: '0xFDd4ABaF518d49A6749A3aD6A68f9403bD93cFF0',
token_in: 'USDC',
token_out: 'USDT'
})
};
fetch('https://api.rach.finance/caas/api/v1/swaps', 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://api.rach.finance/caas/api/v1/swaps",
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([
'amount' => '100.00',
'idempotency_key' => 'swap_ref_001',
'sender_phone' => '0xFDd4ABaF518d49A6749A3aD6A68f9403bD93cFF0',
'token_in' => 'USDC',
'token_out' => 'USDT'
]),
CURLOPT_HTTPHEADER => [
"Content-Type: application/json",
"X-API-Key: <api-key>"
],
]);
$response = curl_exec($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://api.rach.finance/caas/api/v1/swaps"
payload := strings.NewReader("{\n \"amount\": \"100.00\",\n \"idempotency_key\": \"swap_ref_001\",\n \"sender_phone\": \"0xFDd4ABaF518d49A6749A3aD6A68f9403bD93cFF0\",\n \"token_in\": \"USDC\",\n \"token_out\": \"USDT\"\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("X-API-Key", "<api-key>")
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://api.rach.finance/caas/api/v1/swaps")
.header("X-API-Key", "<api-key>")
.header("Content-Type", "application/json")
.body("{\n \"amount\": \"100.00\",\n \"idempotency_key\": \"swap_ref_001\",\n \"sender_phone\": \"0xFDd4ABaF518d49A6749A3aD6A68f9403bD93cFF0\",\n \"token_in\": \"USDC\",\n \"token_out\": \"USDT\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.rach.finance/caas/api/v1/swaps")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["X-API-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"amount\": \"100.00\",\n \"idempotency_key\": \"swap_ref_001\",\n \"sender_phone\": \"0xFDd4ABaF518d49A6749A3aD6A68f9403bD93cFF0\",\n \"token_in\": \"USDC\",\n \"token_out\": \"USDT\"\n}"
response = http.request(request)
puts response.read_body{}{}{}{}Swaps
Swap USDC to USDT
Swaps one stablecoin for the other on the customer’s smart-contract wallet via the FiatSwapV2 DEX router. Gas is sponsored by the paymaster; Rach’s per-chain fee is deducted from the input amount and routed to treasury in the same atomic UserOperation. The response is 202 Accepted with a swap_id — poll GET /v1/swaps/{id} or subscribe to the swap.settled / swap.failed webhooks for the terminal result and on-chain tx hash. Test keys (rach_sk_test_) return a simulated result without touching the chain.
POST
/
v1
/
swaps
Swap USDC to USDT
curl --request POST \
--url https://api.rach.finance/caas/api/v1/swaps \
--header 'Content-Type: application/json' \
--header 'X-API-Key: <api-key>' \
--data '
{
"amount": "100.00",
"idempotency_key": "swap_ref_001",
"sender_phone": "0xFDd4ABaF518d49A6749A3aD6A68f9403bD93cFF0",
"token_in": "USDC",
"token_out": "USDT"
}
'import requests
url = "https://api.rach.finance/caas/api/v1/swaps"
payload = {
"amount": "100.00",
"idempotency_key": "swap_ref_001",
"sender_phone": "0xFDd4ABaF518d49A6749A3aD6A68f9403bD93cFF0",
"token_in": "USDC",
"token_out": "USDT"
}
headers = {
"X-API-Key": "<api-key>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {'X-API-Key': '<api-key>', 'Content-Type': 'application/json'},
body: JSON.stringify({
amount: '100.00',
idempotency_key: 'swap_ref_001',
sender_phone: '0xFDd4ABaF518d49A6749A3aD6A68f9403bD93cFF0',
token_in: 'USDC',
token_out: 'USDT'
})
};
fetch('https://api.rach.finance/caas/api/v1/swaps', 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://api.rach.finance/caas/api/v1/swaps",
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([
'amount' => '100.00',
'idempotency_key' => 'swap_ref_001',
'sender_phone' => '0xFDd4ABaF518d49A6749A3aD6A68f9403bD93cFF0',
'token_in' => 'USDC',
'token_out' => 'USDT'
]),
CURLOPT_HTTPHEADER => [
"Content-Type: application/json",
"X-API-Key: <api-key>"
],
]);
$response = curl_exec($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://api.rach.finance/caas/api/v1/swaps"
payload := strings.NewReader("{\n \"amount\": \"100.00\",\n \"idempotency_key\": \"swap_ref_001\",\n \"sender_phone\": \"0xFDd4ABaF518d49A6749A3aD6A68f9403bD93cFF0\",\n \"token_in\": \"USDC\",\n \"token_out\": \"USDT\"\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("X-API-Key", "<api-key>")
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://api.rach.finance/caas/api/v1/swaps")
.header("X-API-Key", "<api-key>")
.header("Content-Type", "application/json")
.body("{\n \"amount\": \"100.00\",\n \"idempotency_key\": \"swap_ref_001\",\n \"sender_phone\": \"0xFDd4ABaF518d49A6749A3aD6A68f9403bD93cFF0\",\n \"token_in\": \"USDC\",\n \"token_out\": \"USDT\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.rach.finance/caas/api/v1/swaps")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["X-API-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"amount\": \"100.00\",\n \"idempotency_key\": \"swap_ref_001\",\n \"sender_phone\": \"0xFDd4ABaF518d49A6749A3aD6A68f9403bD93cFF0\",\n \"token_in\": \"USDC\",\n \"token_out\": \"USDT\"\n}"
response = http.request(request)
puts response.read_body{}{}{}{}Authorizations
Your Rach B2B API key. Use rach_sk_live_* for production (on-chain) or rach_sk_test_* for sandbox (no-chain simulation).
Body
application/json
Swap parameters
Example:
"100.00"
Example:
"swap_ref_001"
sender_phone accepts a 0x wallet address OR an E.164 phone (auto-detected).
Example:
"0xFDd4ABaF518d49A6749A3aD6A68f9403bD93cFF0"
Available options:
USDC, USDT Example:
"USDC"
Available options:
USDC, USDT Example:
"USDT"
Response
Accepted
The response is of type object.
⌘I