The Scenario
You manage content for three brands, and each brand has a separate worksheet in the same Excel workbook — captions in column A, platform in column B, scheduled date in column C. The plan is to launch all three content calendars on the same Monday morning. It's Friday afternoon.
The bad version:
- Open Postiz, go to the scheduler, paste the first caption, select the right integration from the dropdown, set the date from column C, hit schedule, write the post ID back into column D by hand.
- Repeat for all 60 rows across three worksheets, switching between the workbook and Postiz for each one.
- Discover at row 34 that "instagram" in column B doesn't match the Postiz integration name "Instagram (Brand A)" — and backtrack to figure out how many previous rows had the same mismatch.
Sixty posts is four to five hours of mechanical work. That's your Friday afternoon, and you still have the actual strategy deck due Monday.
The Easy Way: One Prompt in SheetXAI
SheetXAI is an AI agent that lives inside your Excel workbook. It reads your content calendar, understands the column structure, and talks to Postiz on your behalf — scheduling every post and writing the returned IDs back where you specify.
Read every row in the Content Calendar sheet and schedule each social post using the caption in column A, platform in column B, and date in column C — log each Postiz post ID back into column D.
What You Get
- Every row in the workbook fires as a separate Postiz scheduled post — captions, platforms, and datetimes exactly as specified.
- Post IDs land in column D as each row completes, so you can see progress in real time.
- Rows that fail — mismatched platform names, blank cells, date format issues — surface with an error note in column D rather than silently skipping.
- The result is a fully populated column D you can use as a record of what was scheduled and when.
What If the Data Is Not Quite Ready
The platform names in column B don't match any Postiz integration
Before scheduling, list all connected Postiz integration names and compare them to the unique values in column B. For any mismatch, write the closest Postiz integration name into column E so I can review before scheduling.
The dates in column C are in mixed formats (some MM/DD/YYYY, some YYYY-MM-DD)
Normalize all dates in column C to ISO 8601 format (YYYY-MM-DDTHH:MM:SS), then schedule each row to the matching Postiz integration and write the post ID into column D.
The content calendar spans three worksheets and I want all of them scheduled
For each row across the Brand A, Brand B, and Brand C worksheets — caption in column A, platform in column B, date in column C — schedule the post to the matching Postiz integration and write the returned post ID into column D of the same worksheet.
The captions need final polish, dates need normalization, and platform names need lookup — all before scheduling
In the Content Calendar sheet: standardize all dates in column C to ISO 8601, match each platform name in column B to the closest connected Postiz integration, rewrite any caption in column A that is shorter than 50 characters to be more compelling, then schedule every row and write post IDs into column D.
One prompt covers the cleanup, the matching, and the scheduling — nothing goes to Postiz until the data is ready.
Try It
Get the 7-day free trial of SheetXAI and open your content calendar workbook — even one with 60 rows across multiple worksheets — and ask it to schedule everything into Postiz in one go. Also worth reading: Generate AI images for social posts and the Postiz MCP hub overview.