Same-asset bridging

Overview

Move the same stablecoin from one supported chain to another — for example USDT on Ethereum to USDT on Polygon, or USDC on Base to USDC on Solana. The destination amount matches the source amount. No conversion, no FX spread. Create a normal crypto-to-crypto transfer (or use the Console transfer page) with the same currency on both legs and different paymentRail values.

Supported corridors

Both the source and destination networks must be in this matrix for that asset. Networks must differ.

Asset	Networks
USDC	Ethereum, Solana, Arbitrum, Base, Polygon
USDT	Ethereum, Tron, Arbitrum, Polygon, Solana

Same-chain moves (for example USDC on Base → USDC on Base) are wallet transfers, not bridges.

Amounts on this path support at most 4 decimal places. Use 5.1234 USDT, not 5.123456. In minor units that means the last two digits of a 6-decimal rawValue must be 00 (for example "5000000" for 5 USDT).

Prerequisites

Verified customer (KYC/KYB completed) with same-asset bridging enabled for their account
Distinct source and destination accounts (the same Infinite wallet cannot be both)
Source funded on the source chain, or a deposit instruction if the customer will push funds in

Quote (optional)

Same-asset bridges quote at 1:1. A quote is optional; the transfer API will still settle at par.

import requests

response = requests.post(
    'https://api.infinite.dev/v1/quotes',
    headers={
        'Authorization': 'Bearer YOUR_API_KEY',
        'Content-Type': 'application/json',
    },
    json={
        'onBehalfOf': 'cus_abc123',
        'sourceAmount': {'currency': 'USDT', 'rawValue': '5000000'},
        'payinMethod': 'ETHEREUM',
        'destinationCurrency': 'USDT',
        'payoutMethod': 'POLYGON',
    },
)

const response = await fetch('https://api.infinite.dev/v1/quotes', {
  method: 'POST',
  headers: {
    Authorization: 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    onBehalfOf: 'cus_abc123',
    sourceAmount: { currency: 'USDT', rawValue: '5000000' },
    payinMethod: 'ETHEREUM',
    destinationCurrency: 'USDT',
    payoutMethod: 'POLYGON',
  }),
});

export INFINITE_API_KEY=YOUR_API_KEY
infinite api POST /v1/quotes --body '{
  "onBehalfOf": "cus_abc123",
  "sourceAmount": {"currency": "USDT", "rawValue": "5000000"},
  "payinMethod": "ETHEREUM",
  "destinationCurrency": "USDT",
  "payoutMethod": "POLYGON"
}'

Quote bridging 5 USDT from Ethereum to Polygon for cus_abc123.

# With an agent key the assistant calls get_quote; with an org key run the CLI tab.

curl --request POST \
  --url https://api.infinite.dev/v1/quotes \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
    "onBehalfOf": "cus_abc123",
    "sourceAmount": {
      "currency": "USDT",
      "rawValue": "5000000"
    },
    "payinMethod": "ETHEREUM",
    "destinationCurrency": "USDT",
    "payoutMethod": "POLYGON"
  }'

Create the transfer

import requests

response = requests.post(
    'https://api.infinite.dev/v1/transfers',
    headers={
        'Authorization': 'Bearer YOUR_API_KEY',
        'Content-Type': 'application/json',
    },
    json={
        'onBehalfOf': 'cus_abc123',
        'amount': {'currency': 'USDT', 'rawValue': '5000000'},
        'source': {
            'currency': 'USDT',
            'paymentRail': 'ETHEREUM',
            'accountId': 'inw_source123',
        },
        'destination': {
            'currency': 'USDT',
            'paymentRail': 'POLYGON',
            'accountId': 'inw_dest456',
        },
        'paymentReason': 'SELF',
        'confirm': True,
    },
)

const response = await fetch('https://api.infinite.dev/v1/transfers', {
  method: 'POST',
  headers: {
    Authorization: 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    onBehalfOf: 'cus_abc123',
    amount: { currency: 'USDT', rawValue: '5000000' },
    source: {
      currency: 'USDT',
      paymentRail: 'ETHEREUM',
      accountId: 'inw_source123',
    },
    destination: {
      currency: 'USDT',
      paymentRail: 'POLYGON',
      accountId: 'inw_dest456',
    },
    paymentReason: 'SELF',
    confirm: true,
  }),
});

export INFINITE_API_KEY=YOUR_API_KEY
infinite api POST /v1/transfers --body '{
  "onBehalfOf": "cus_abc123",
  "amount": {"currency": "USDT", "rawValue": "5000000"},
  "source": {
    "currency": "USDT",
    "paymentRail": "ETHEREUM",
    "accountId": "inw_source123"
  },
  "destination": {
    "currency": "USDT",
    "paymentRail": "POLYGON",
    "accountId": "inw_dest456"
  },
  "paymentReason": "SELF",
  "confirm": true
}'

Bridge 5 USDT from inw_source123 on Ethereum to inw_dest456 on Polygon on behalf of cus_abc123, and submit it.

# With an agent key the assistant calls create_transfer (draft) then submit_transfer; with an org key run the CLI tab.

curl --request POST \
  --url https://api.infinite.dev/v1/transfers \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
    "onBehalfOf": "cus_abc123",
    "amount": {
      "currency": "USDT",
      "rawValue": "5000000"
    },
    "source": {
      "currency": "USDT",
      "paymentRail": "ETHEREUM",
      "accountId": "inw_source123"
    },
    "destination": {
      "currency": "USDT",
      "paymentRail": "POLYGON",
      "accountId": "inw_dest456"
    },
    "paymentReason": "SELF",
    "confirm": true
  }'

If the source is not a funded Infinite wallet, the response includes depositInstructions with the address and amount to send on the source chain. After the deposit confirms, Infinite delivers the same asset on the destination chain.

Console

On the transfer page: First Party → pick two different treasuries or wallets → set source to USDT · ETHEREUM (or another supported pair) and destination to the same asset on a different chain. The quote should show a 1:1 rate.

What this is not

USDC ↔ USDT is a conversion, not a same-asset bridge. Use a quote for that pair.
USDC on Tron and USDT on Base are not in the native bridge matrix above.
Recurring inbound addresses that always sweep to another chain use a CRYPTO_TO_CRYPTO fixed route instead of a one-off transfer.

Get started

Core Concepts

Guides

Overview

Supported corridors

Prerequisites

Quote (optional)

Create the transfer

Console

What this is not

​Overview

​Supported corridors

​Prerequisites

​Quote (optional)

​Create the transfer

​Console

​What this is not

Overview

Supported corridors

Prerequisites

Quote (optional)

Create the transfer

Console

What this is not