Walmart Marketplace upload repair
Walmart error: value has the wrong data type or format
Applies to: MP_ITEM, MP_MAINTENANCE
What causes this error
Each attribute declares a data type (string, number, URL, boolean, array). Values that don't parse as the declared type are rejected — e.g. a price with a currency symbol, a measure field containing text, or a URL missing its scheme.
How to fix it
Option A: fix it manually
- Match each flagged field to its declared type in the Item Spec.
- Strip currency symbols, commas, and stray text from numeric fields.
- Ensure URL fields start with http:// or https:// and contain no spaces.
- Re-upload after every flagged cell matches its declared type.
Option B: fix it automatically
This issue can be detected and prepared for automatic repair by the Walmart fixer.
Auto-fixer launching soon
We're building a tool that fixes this error automatically. Upload your file, download a corrected one, and get notified when it's live.