API reference

Simple payments API

Base URL same origin or https://api.chainsplit.io. No version prefix. No API key for the payment flow. HTTPS only.

Identity

Callback URL uniquely identifies a payment address. Identical callbacks return the same address_in.
callback_id is your order reference. Echoed on every webhook.
address plus chain is the volume key for 30-day fee tiers.

Harden the callback with an unguessable nonce that you store server-side and verify on receipt.

Create payment address

GET /{ticker}/create/

Query	Required	Notes
`callback`	yes	URL-encoded HTTPS endpoint. Keep it unique.
`address`	yes	Your receiving wallet for this ticker.
`callback_id`	no	Merchant reference, echoed back.
`pending`	no	`1` to receive mempool webhooks.
`confirmations`	no	Override default confirmations.
`post`	no	`1` sends webhook as POST.
`json`	no	`1` sends JSON body (implies POST).
`convert`	no	`1` includes fiat conversions.

curl -G /erc20/usdt/create/ \
  --data-urlencode "address=0xYourUsdtWallet" \
  --data-urlencode "callback=https://merchant.tld/webhook?callback_id=ord_1842&nonce=u9f3" \
  --data-urlencode "pending=1" \
  --data-urlencode "json=1"

Tickers

v1 matches CryptAPI on four EVMs: Ethereum, BNB Smart Chain, Arbitrum, Polygon. Paths are drop-in (erc20/usdt, arbitrum/usdc.e). Bitcoin, Solana and Tron are not in this API yet.

Ethereum chainId 1

Asset	Ticker
DAI on Ethereum	`erc20/dai`
LINK on Ethereum	`erc20/link`
mUSD on Ethereum	`erc20/musd`
ONDO on Ethereum	`erc20/ondo`
PEPE on Ethereum	`erc20/pepe`
POL on Ethereum	`erc20/pol`
PYUSD on Ethereum	`erc20/pyusd`
SHIB on Ethereum	`erc20/shib`
TRX on Ethereum	`erc20/trx`
USD1 on Ethereum	`erc20/usd1`
USDC on Ethereum	`erc20/usdc`
USDT on Ethereum	`erc20/usdt`
Wrapped XRP on Ethereum	`erc20/wxrp`
ARB on Ethereum	`erc20/arb`
BNB on Ethereum	`erc20/bnb`
cbBTC on Ethereum	`erc20/cbbtc`
Ethereum	`eth`
1INCH on Ethereum	`erc20/1inch`

BNB Smart Chain chainId 56

Asset	Ticker
1INCH on BNB	`bep20/1inch`
ADA on BNB	`bep20/ada`
BNB	`bep20/bnb`
BTCB on BNB	`bep20/btcb`
CAKE on BNB	`bep20/cake`
DAI on BNB	`bep20/dai`
DOGE on BNB	`bep20/doge`
ETH on BNB	`bep20/eth`
LTC on BNB	`bep20/ltc`
PHPt on BNB	`bep20/phpt`
SHIB on BNB	`bep20/shib`
TRX on BNB	`bep20/trx`
USD1 on BNB	`bep20/usd1`
USDC on BNB	`bep20/usdc`
USDT on BNB	`bep20/usdt`
XRP on BNB	`bep20/xrp`

Arbitrum One chainId 42161

Asset	Ticker
ARB	`arbitrum/arb`
DAI on Arbitrum	`arbitrum/dai`
ETH on Arbitrum	`arbitrum/eth`
LINK on Arbitrum	`arbitrum/link`
PEPE on Arbitrum	`arbitrum/pepe`
PYUSD on Arbitrum	`arbitrum/pyusd`
USDC on Arbitrum (native)	`arbitrum/usdc`
USDC.e on Arbitrum (bridged)	`arbitrum/usdc.e`
USDT0 on Arbitrum	`arbitrum/usdt0`

Polygon chainId 137

Asset	Ticker
USDC.e on Polygon (bridged)	`polygon/usdc.e`
USDT on Polygon	`polygon/usdt`
WETH on Polygon	`polygon/weth`
AVAX on Polygon	`polygon/avax`
POL	`polygon/pol`
USDC on Polygon (native)	`polygon/usdc`

Other endpoints

GET /info/ — all tickers + fee_tiers
GET /{ticker}/info/?prices=1 — minima and current fee_percent
GET /{ticker}/estimate/ — network fee estimate
GET /{ticker}/logs/?callback=... — webhook history

See also Fees and the optional merchant dashboard.