> For the complete documentation index, see [llms.txt](https://docs.xorosoft.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.xorosoft.com/developers-api/vendor-management/create-or-update-item-vendor-mapping.md).

# Create or Update Item Vendor Mapping

Create or update item data in Xorosoft ERP. Send the JSON payload using the field names documented in this operation and in the module export/import format used by Xorosoft ERP.

```json
{"openapi":"3.0.3","info":{"title":"Xorosoft ERP Public API","version":"2026.07"},"tags":[{"name":"Vendor Management","description":"Use Vendor Management APIs to retrieve vendors and maintain vendor-related item mappings and pricing references. These endpoints help purchasing, supplier, and catalog integrations connect vendor data, vendor part numbers, pricing rules, and item/customer mappings with Xorosoft ERP records."}],"servers":[{"url":"https://res.xorosoft.io","description":"Xorosoft ERP API server"}],"security":[{"basic":[]}],"components":{"securitySchemes":{"basic":{"scheme":"basic","type":"http"}},"schemas":{"XoroApiResponse":{"type":"object","description":"Standard Xorosoft ERP API response envelope used by most endpoints.","properties":{"Result":{"type":"boolean","description":"True when the operation completed successfully."},"Message":{"type":"string","description":"Human-readable success or error message."},"Data":{"description":"Endpoint-specific payload.","type":"object","additionalProperties":true,"nullable":true},"Page":{"type":"integer","description":"Current page number when paging is enabled.","nullable":true},"TotalPages":{"type":"integer","description":"Total page count when paging is enabled.","nullable":true}}},"PostItemCreateitemvendormapRequest":{"type":"array","items":{"type":"object","properties":{"ItemNumber":{"type":"string"},"BasePartNumber":{"type":"string"}}},"description":"Request body for Create Itemvendormap."}}},"paths":{"/api/xerp/item/createitemvendormap":{"post":{"tags":["Vendor Management"],"summary":"Create or Update Item Vendor Mapping","description":"Create or update item data in Xorosoft ERP. Send the JSON payload using the field names documented in this operation and in the module export/import format used by Xorosoft ERP.","operationId":"post_item_createitemvendormap","responses":{"200":{"description":"Request processed successfully.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/XoroApiResponse"}}}},"400":{"description":"Invalid request, failed validation, or business rule error.","content":{"text/plain":{"schema":{"type":"string"}}}},"401":{"description":"Missing or invalid private app credentials."},"403":{"description":"Private app does not have permission for this request."}},"requestBody":{"required":true,"content":{"application/json":{"schema":{"$ref":"#/components/schemas/PostItemCreateitemvendormapRequest"}}}}}}}}
```


---

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