API Errors

Every error response from the Email API has the same shape:


{
  "success": false,
  "error": "INSUFFICIENT_BALANCE",
  "message": "Wallet balance ₹0.00 — recharge to continue sending."
}

Field	Meaning
`success`	Always `false` for errors
`error`	Stable code — build retry/handling logic against this
`message`	Human-readable text. May change for clarity over time
`field`	(When relevant) Specific field that caused the error

For the complete error code reference + retry guidance, see Knowledge Base → Errors.

HTTP status codes

Code	Meaning
`200`	Success
`201`	Resource created
`400`	Bad request — fix your inputs
`401`	Missing / invalid API key
`402`	Insufficient wallet balance — recharge
`403`	Sandbox cap, sending paused, or feature locked
`404`	Resource not found
`409`	Conflict (duplicate name, etc.)
`429`	Rate limit hit — back off
`500`	Server error — retry with backoff
`502`	Upstream gateway error (Zoho etc.)
`503`	Database / dependency unavailable

Status	Retry?
4xx (except 408 / 429)	No — fix the request
408 / 429	Yes — exponential backoff
5xx	Yes — up to 3 attempts with backoff

See Knowledge Base → Errors for per-code guidance.