7 chainsBitcoin, Ethereum, TRON, Solana, BNB Chain, Polygon & Arbitrum

The Unified Blockchain API for Crypto Payments & Webhooks

One REST API to send tokens, detect deposits, and trigger webhooks for on-chain events — built for production teams.

No card required • Go live in hours

For solo developers, bootstrappers and small payment teams. Non-custodial, so not for teams that want a provider to hold their funds.

Trusted by our community of developers and builders:

Create Secure Wallet Addresses

Create password-protected wallets for Ethereum, BSC, Polygon & Tron via the Chaingateway Wallet API.

Create Native Token Transactions

Send ETH, BNB, MATIC, TRX or BTC using a single API call with your Chaingateway wallet.

Create ERC20 / BEP20 / TRC20 Token Transfers

Send ERC20, BEP20 and TRC20 tokens with a single API call for any supported network.

Create & Receive Webhooks

Subscribe to on-chain events and receive real-time payment notifications via Webhooks.

Fetch Decoded Tron Transactions

Fetch and decode Tron transactions to human-readable data (method, parameters, amounts).

create-address.js

// Chaingateway - Create a password-protected EVM address// Docs: /developers/tutorials/create-addresses.htmlconst axios = require('axios');async function createSecureAddress() {  const url = 'https://api.chaingateway.io/v2/ethereum/addresses';  const payload = {    // Optional: omit password to get privatekey in response (single-use only)    password: 'your_secure_password',  };  const headers = {    Accept: 'application/json',    'content-type': 'application/json',    Authorization: 'YOUR_API_TOKEN',  };  const response = await axios.post(url, payload, { headers });  console.log('Created address:', response.data);  // Example response:  // {  //   "status": 201,  //   "ok": true,  //   "message": "Address created",  //   "data": {  //     "address": "0xYourNewAddress",  //     "keystore": "{...}" // only for EVM when password given  //   }  // }}// For BSC/Polygon just replace /ethereum with /bsc or /polygon// For Tron replace /ethereum with /troncreateSecureAddress().catch(console.error);

Every plan starts with a 7-day free trial — no credit card, no KYC. Create your API key and run the example above against your own account.

What arrives at your server when a deposit lands

Create one webhook for an address. When a matching transfer settles on the chain, Chaingateway sends the transfer data to your URL.

1. Subscribe to an address

curl --request POST \
  --url https://app.chaingateway.io/api/v2/tron/webhooks \
  --header 'Authorization: YOUR_SECRET_TOKEN' \
  --header 'Content-Type: application/json' \
  --data '{
    "to": "YOUR_DEPOSIT_ADDRESS",
    "url": "https://example.com/webhook"
  }'

The minimum is a url plus a from or to address. The optional filters contractaddress, token_id and type narrow it down.

2. Your server receives this

{  "id": "9d18457f-c71c-4be4-ae7c-ce04e48359ed",  "webhook_id": "9ced86a9-b8d9-4bc2-bbd8-5ffe5b456bc8",1  "from": "TTd9qHyjqiUkfTxe3gotbuTMpjU8LEbpkN",1  "to": "DScWVXehzWdV2YS8fA2ryNsiHpKiLgAxM",4  "blocknumber": "65542464",4  "datetime": "2024-09-25 14:48:27",  "tokenid": null,2  "type": "TRC20",2  "contractaddress": "TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t",5  "txid": "18f52f2a55b94a6e3705de4abb18e95dfce79970f27b29450705c561e12b6988",3  "amount": 108935}

Example payload: a TRC20 transfer on TRON, taken from the webhook documentation. The values are illustrative.

1 from / to Sender and receiver address of the transfer.
2 type / contractaddress Asset type and the token contract.
3 amount The transferred amount, as delivered in the payload.
4 blocknumber / datetime Block number and timestamp of the event.
5 txid The transaction ID. If you set a personal secret, the X-Signature header is an HMAC built from it.

Each notification is one HTTP POST to your URL. A notification your server does not accept is not re-sent automatically; failed notifications are listed in the API and can be retried manually.

Read the webhook documentation

Why Us?

A better way to build Blockchain Apps

Payments should be boring plumbing, not a research project. A deposit you miss without noticing costs you your reputation, so you want to see every incoming transfer. Webhooks report them as they happen on Bitcoin, Ethereum, TRON, BNB Chain, Polygon and Arbitrum (Solana has no webhook endpoints), and the API lets you fetch the on-chain data yourself whenever you want to verify.

Fetch Blockchain Data

Fetch Blockchain data with our unified API, fully decoded supporting multiple chains

Realtime Blockchain Event Notifications

Get notified of on-chain events via webhooks, including instant payment notifications and contract executions

Easy Transaction

Build, sign, and send transactions with simple API calls. We built smart defaults so you don’t have to

We Support Your Token

We integrate with all major token standards, including ERC-20, ERC-721, TRC-20, TRC-721 & BEP-20

Core Features

Everything you need, unified

All the blockchain operations you need with one consistent API. Stop juggling different endpoints for different chains.

Send Transactions

One function call to send transactions across all chains. Tron, Ethereum, Polygon, Bitcoin, Arbitrum—same interface.

Gas estimation
Auto-nonce handling
Signature verification

Token Transactions

Send ERC-20, TRC-20, BEP-20 tokens with the same API call. No contract address complexity.

Works with any token
Auto token detection
Decimal handling

Check Balances

Query native and token balances instantly. Automatic formatting and decimals—no manual parsing.

Instant queries
Works with all tokens
NFT Ownership support

Decoded Data

All blockchain responses come pre-decoded and human-readable. No hex parsing required.

Auto-decoding
Type safety
Full metadata

Unified Endpoints

Every chain uses identical routes and parameters. Write once, deploy everywhere.

Same routes
Same parameters
No chain logic

Enterprise Security

HMAC-signed webhooks, bearer-token authentication, and wallets encrypted with your password. We never store your password.

HMAC signing
Bearer Auth
Password-encrypted wallets

Working with all Tokens,
Including Yours!

With Chaingateway, you can receive and send any token on all implemented blockchains. You can build your own token and launch a payment system in minutes.

Interact with your Token

Lightning-fast: Payment detected → Webhook fired → Your app notified

Know the second a payment hits.
React in real-time.

Chaingateway webhooks instantly notify your system of every deposit, withdrawal, and balance change—so you can automate fulfillment, trigger workflows, and delight customers without lifting a finger.

Payment received

Customer sent 1,000 USDC

Webhook fired

Real-time event pushed to your endpoint

Processing event

Action triggered

Order fulfilled, email sent, CRM updated

Non-custodial webhook delivery across seven chains. Start free for 7 days — no card, no KYC.

Supported Networks

One API. Every major chain.

Build once and deploy everywhere. Use identical code for all supported blockchains. No chain-specific logic needed.

Ethereum

The leading smart contract platform

ERC-20 Tokens
ERC-721 NFTs

mainnetsepolia

Tron

Fast and cost-efficient blockchain

TRC-20 Tokens
TRC-721 NFTs

mainnetnile

Polygon

Ethereum's scaling solution

ERC-20 Tokens
ERC-721 NFTs

mainnetamoy

BNB Chain

Binance's high-performance chain

BEP-20 Tokens
BEP-721 NFTs

mainnettestnet

Arbitrum

Ethereum L2 for high throughput

ERC-20 Tokens
ERC-721 NFTs