Error Handling

All API errors return a consistent JSON structure.

{
  "error": {
    "code": "NOT_FOUND",
    "message": "Payment not found",
    "status": 404
  }
}

---

Error codes

HTTP status	Code	Description
400	BAD_REQUEST	Missing required field, invalid format, or missing merchant account
401	UNAUTHORIZED	Missing or invalid API key, account not activated, or user banned
403	FORBIDDEN	Insufficient scope, resource belongs to another merchant, or test/live mode mismatch
404	NOT_FOUND	Payment, product, or webhook not found
409	CONFLICT	Duplicate idempotency key with different parameters
422	UNPROCESSABLE_ENTITY	Validation error — e.g. unsupported token/network combination
429	RATE_LIMIT_EXCEEDED	Exceeded 100 requests per minute
500	INTERNAL_ERROR	Server error — contact support if persistent

---

Handling errors in code

JavaScript

const res = await fetch("https://apipay.byastra.ai/v1/api/payments", {
  method: "POST",
  headers: { "X-Api-Key": "ap_live_xxx", "Content-Type": "application/json" },
  body: JSON.stringify({ amount: 25, token: "USDC", network: "BASE" }),
});

if (!res.ok) {
  const { error } = await res.json();
  console.error(`[${error.code}] ${error.message}`);
  // Handle specific codes
  if (error.code === "RATE_LIMIT_EXCEEDED") {
    // retry with backoff
  }
}

Python

For 429 errors, implement exponential backoff. Retrying immediately will not help and may extend your lockout window.