Common - Chains Catalog

Retrieve the catalog of supported blockchain networks and cryptocurrency assets available on the SureLink Gateway. Call this endpoint to obtain valid chain codes prior to initiating crypto deposit or withdrawal orders.

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1. List Supported Chains

GET /api/v1/chains

Headers

Standard HMAC authentication headers (X-Api-Key, X-Timestamp, X-Nonce, X-Signature).

Query Parameters

Parameter	Type	Required	Default	Description
asset	string	No	USDT	Filter by cryptocurrency symbol (e.g., USDT)

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Request Example

cURL

curl -X GET "https://api-sandbox.surelink.io/api/v1/chains?asset=USDT" \
  -H "X-Api-Key: mch_key_your_api_key" \
  -H "X-Timestamp: 1715000000000" \
  -H "X-Nonce: 9f8e7d6c5b4a392817263544a1b2c3d4" \
  -H "X-Signature: c8b9...f01"

Node.js

import { sendSignedRequest } from './signer';

const result = await sendSignedRequest({
  apiKey: 'mch_key_...',
  apiSecret: 'sec_...',
  method: 'GET',
  url: 'https://api-sandbox.surelink.io/api/v1/chains?asset=USDT'
});
console.log(result.items);

---

Response

• Status Code: 200 OK

{
  "items": [
    {
      "code": "TRON",
      "name": "Tron (TRC20)",
      "protocol": "TRC20"
    },
    {
      "code": "ETH",
      "name": "Ethereum (ERC20)",
      "protocol": "ERC20"
    },
    {
      "code": "BSC",
      "name": "BNB Smart Chain (BEP20)",
      "protocol": "BEP20"
    },
    {
      "code": "ARBITRUM",
      "name": "Arbitrum One",
      "protocol": "ERC20"
    },
    {
      "code": "POLYGON",
      "name": "Polygon PoS",
      "protocol": "ERC20"
    }
  ]
}

Field Descriptions

Field	Type	Description
items	Array<ChainOption>	Array of supported chain configurations
items[].code	string	Chain code identifier (pass into chain on order creation)
items[].name	string	Human-readable network display name
items[].protocol	string	Token standard protocol (TRC20, ERC20, BEP20, etc.)