Zinc API Error Reference

HTTP Status Codes

Code	Meaning
200	Success
201	Created
400	Bad Request
401	Unauthorized
402	Payment Required
403	Forbidden
404	Not Found
409	Conflict (duplicate)
422	Validation error
500	Internal Server Error
502	Bad Gateway

Error Response Format

{ "error": { "code": "error_code", "message": "Human-readable message", "details": { "field": "context" } } }

The error object is nested under error — read body.error.code, not body.code. details is null when there's no field-level context.

API Error Codes

General

• not_found — Resource not found
• validation_error — Bad/missing parameter (check details)
• bad_request — Malformed request
• already_exists — Duplicate (e.g. idempotency key)
• internal_error — Server-side issue

Authentication

• unauthorized, forbidden, invalid_token, token_expired

Wallet & Payment

• insufficient_funds — Low wallet balance (details include required/available in cents)
• payment_failed, payment_method_required, invalid_payment_method

Order Request

• invalid_shipping_address — Address validation failed
• url_unreachable — Product URL inaccessible
• invalid_variant — Variant not found
• out_of_stock, shipping_unavailable, non_us_retailer, order_not_cancellable

External

• external_service_error

Order Processing Error Types

These appear in error_type field on failed orders:

Product

product_not_found, product_out_of_stock, product_unavailable, invalid_product_url, product_variant_required, product_variant_unavailable, product_quantity_unavailable

Price

max_price_exceeded

Cart & Checkout

add_to_cart_failed, cart_empty, checkout_blocked, checkout_failed

Shipping

shipping_address_invalid, shipping_unavailable, shipping_method_unavailable

Payment

payment_declined, payment_method_invalid, payment_failed

Account

login_failed, session_expired, account_locked, account_verification_required

Retailer

retailer_unavailable, retailer_not_supported, retailer_rate_limited

Quantity

quantity_limit_exceeded, order_limit_exceeded