Price feed

The Price Feed API provides real-time pricing information for StableMint tokens.

API Format

GET /v1/price/{chain}/{token}

Path Parameters

Parameter	Type	Description	Values
`chain`	string	Blockchain network	`etherlink`
`token`	string	Token symbol	`usdsm`, `eursm`

Response Format

Example Response

{
  "symbol": "USDSM",
  "contractAddress": "0x6bDE51212203aE5d592Cc5180DA2ABBd41c922dE",
  "price": "1.00",
  "priceCurrency": "USD",
  "timestamp": "2025-11-20T09:02:04.972",
  "version": "1.0",
  "signature": "WyAEj75t6D3i5lolnxsvcjF3oIZD0ElB0YbtCnsevvVpz4pofFTx1U0ZNBcZXUx7..."
}

The signature field contains a base64-encoded RSA signature. Full signature examples are shown in the validation section below.

Signature Validation

The signature field in the response is generated from the following payload components concatenated with pipe (|) separators:

symbol|price|priceCurrency|timestamp|version

JavaScript Validation Example

const crypto = require('crypto');

function validateSignature(response, publicKey) {
  // Construct the payload string
  const payload = `${response.symbol}|${response.price}|${response.priceCurrency}|${response.timestamp}|${response.version}`;

  // Create verifier
  const verifier = crypto.createVerify('RSA-SHA256');
  verifier.update(payload);

  // Verify signature
  const isValid = verifier.verify(
    publicKey,
    response.signature,
    'base64'
  );

  return isValid;
}

// Example usage
const response = {
  symbol: "EURSM",
  price: "1.00",
  priceCurrency: "EUR",
  timestamp: "2025-11-20T08:43:45.908",
  version: "1.0",
  signature: "cat1nQMbTZL1HrXuLoFSQNIMmf/bLLmdRS/L9fZkUPjHUZ+wHr+UOveX09QO4OIZjFmAQSlRUsJUeQ8DA/MTBb8klrh1YbnoulkrfHWtvKHwurRUY8WH/WhzdaT7bnaymOtRZIugO0utizlPezuVcUgodVOx9MCSW8Bv6wyuQ+LzHSwaE78jhGb6KyPW15avUtRnboGtSsBV/Hpvnly3CXpoFDyREguCoi2v209EG9JufVeIIhPZx3YiNsgsSCq9U2Z+/Wxn1VtkXs7er9jlZ1PnDchYjoMKybGJ9yGpxgpDqja7ps0LtCdbeO+4jubosl+RWo6T/BtdqLUtilB7bg=="
};

const publicKey = `-----BEGIN PUBLIC KEY-----
[PUBLIC KEY HERE]
-----END PUBLIC KEY-----`;

const isValid = validateSignature(response, publicKey);
console.log('Signature valid:', isValid);

Production Environment

Base URL: https://feed.stablemint.io

Public Key

The following public key should be used to validate the payload signature:

Available Endpoints

USDSM on Etherlink

GET https://feed.stablemint.io/v1/price/etherlink/usdsm

EURSM on Etherlink

GET https://feed.stablemint.io/v1/price/etherlink/eursm

Example Request

curl https://feed.stablemint.io/v1/price/etherlink/eursm

Staging Environment

Base URL: https://feed.stablemint.net

Public Key

The following public key should be used to validate the payload signature:

Available Endpoints

USDSM on Etherlink

GET https://feed.stablemint.net/v1/price/etherlink/usdsm

EURSM on Etherlink

GET https://feed.stablemint.net/v1/price/etherlink/eursm

Example Request

curl https://feed.stablemint.net/v1/price/etherlink/eursm

Get started

Authentication

Core resources

Accept payments

Send money

Webhooks

Feed

Cross-chain bridge

API Format

Path Parameters

Response Format

Example Response

Signature Validation

JavaScript Validation Example

Production Environment

Public Key

Available Endpoints

Example Request

Staging Environment

Public Key

Available Endpoints

Example Request

​API Format

​Path Parameters

​Response Format

​Example Response

​Signature Validation

​JavaScript Validation Example

​Production Environment

​Public Key

​Available Endpoints

​Example Request

​Staging Environment

​Public Key

​Available Endpoints

​Example Request

API Format

Path Parameters

Response Format

Example Response

Signature Validation

JavaScript Validation Example

Production Environment

Public Key

Available Endpoints

Example Request

Staging Environment

Public Key

Available Endpoints

Example Request