The Scenario
You are a copywriter at a marketing agency. The seasonal campaign launches in four days. Your retail client has 30 mail templates stored in a Google Sheet: template name in column A and the full HTML content in column B. Every one of them needs to be live in PostGrid before the campaign manager can start scheduling sends.
The problem: creating 30 templates by hand in PostGrid means 30 trips into the dashboard, 30 copy-pastes of HTML, 30 fields to fill in. You did it last season. It took a full afternoon and you made three paste errors.
The slow version this season:
- Open PostGrid, click New Template, paste the name, paste the HTML
- Repeat 30 times
- Discover one template has the wrong HTML on day two of the campaign
- Fix it by hand while the campaign manager waits
- You deliver the templates a day late.
The fast version is one prompt.
The Easy Way: One Prompt in SheetXAI
SheetXAI reads your template sheet and pushes each row to PostGrid for you, writing the returned template ID back so the campaign manager can reference them immediately.
Open the SheetXAI sidebar and type:
For each row in the 'Templates' sheet, create a PostGrid letter template using the name in column A and the HTML content in column B. Write the returned template ID into column C.
SheetXAI iterates through all 30 rows, calls PostGrid's template creation endpoint for each, and writes each returned template ID back to column C. The campaign manager can see every ID the moment the prompt finishes.
What You Get
30 PostGrid letter templates, created and logged:
- Template name — from column A, exactly as your copywriter wrote it
- HTML content — from column B, no copy-paste errors
- Template ID — written back to column C for every row
- Verification — if any row fails, column C stays blank and you know which one
Column C becomes the campaign manager's reference sheet. They pull template IDs from column C and drop them into PostGrid campaigns without hunting through the dashboard. No chasing down IDs, no naming convention guesswork.
Already have some templates in PostGrid from last season? Add "if column C already has a template ID, update the existing template instead of creating a new one" and SheetXAI handles both creates and updates in the same pass.
What If the Data Is Not Quite Ready
Template sheets that live in shared drives get messy fast. SheetXAI handles the cleanup and the push in the same prompt.
When some HTML has unclosed tags from copy-paste
A few rows have malformed HTML because someone pasted from a rich-text editor. PostGrid will reject them.
Before creating templates, check the HTML in column B for unclosed
<div>or<p>tags. Fix any that are malformed. Then create a PostGrid letter template for each row and write the returned template ID into column C.
When rows need to be split into letter vs postcard types
The sheet mixes letter templates and postcard templates. PostGrid creates them through different endpoints.
For each row in the 'Templates' sheet, check column D for the type value. If column D says 'Letter', create a PostGrid letter template. If it says 'Postcard', create a PostGrid postcard template. Write the returned template ID into column C either way.
When some templates already exist and others are net-new
Column C has IDs for templates pushed last season. You want to update those and create new ones for the rest.
For rows where column C already has a PostGrid template ID, call the PostGrid update endpoint with the HTML from column B. For rows where column C is blank, create a new template and write the returned ID into column C.
When the HTML needs merge-variable injection, type routing, and upsert logic all at once
The HTML in column B uses placeholder variables from column E that need to be injected before pushing. Some rows are updates, some are creates, and the type varies by row.
For each row, replace the string OFFER_PLACEHOLDER in the HTML in column B with the value from column E. If column D says 'Letter', use the PostGrid letter template endpoint; if 'Postcard', use the postcard endpoint. If column C has an existing ID, update it; otherwise create new and write the ID into column C.
The pattern: instead of three manual steps — clean, decide, push — you describe the logic once and SheetXAI runs it end to end.
Try It
Get the 7-day free trial of SheetXAI and open any sheet with HTML template content, then ask it to push the templates to PostGrid. The PostGrid integration is included in every SheetXAI plan. For a related workflow, see how to send a bulk letter campaign from a sheet or the PostGrid in Google Sheets overview.