Smartsheet APIConnect Smartsheet without building on its API
Smartsheet has a REST API. Customers only: Smartsheet names the required plan as Business, Enterprise, or Advanced Work Management. If you're reading the docs because you need Smartsheet to talk to the rest of your stack, Caddi does that without you writing or maintaining integration code: you show it the job once, and it runs it across Smartsheet and your other tools.
- APIREST (JSON)
- AuthOAuth 2.0 or API access token
- AccessPlan-dependent
What the Smartsheet API gives you
- Type
- REST (JSON)
- Authentication
- OAuth 2.0 or API access token (Bearer)
- Who can get access
- Customers only: Smartsheet names the required plan as Business, Enterprise, or Advanced Work Management.
- What it covers
- Sheets, rows, columns, cells, folders, workspaces, reports, attachments, discussions, users and webhooks.
- Limits
- 300 requests per minute per API token, and attachment uploads and cell-history calls count 10x each (so 30 per minute).
Official docs: developers.smartsheet.com. Checked September 2026. Vendors change access terms, so confirm with Smartsheet before you build.
Building on the Smartsheet API vs. having Caddi run it
| The job | Build it on the API | With Caddi |
|---|---|---|
| Getting access | Register an app, get Smartsheet credentials, and manage tokens and refreshes. | Connect your Smartsheet account once. Caddi holds the connection. |
| Writing the integration | A developer maps fields, handles pagination, retries and rate limits, and writes the sync. | You show Caddi the Smartsheet task the way you'd train a new hire. It writes verified code for it. |
| Steps the API doesn't cover | Screens with no endpoint stay manual, or need a separate RPA tool. | Caddi uses a secure, audited browser session where there's no API, in the same automation. |
| The other systems in the loop | Each extra tool is another API, another set of credentials, another integration to own. | One automation runs across all the tools the job touches. |
| Keeping it running | Someone owns the code when the API version, fields or your process change. | Every automation is reviewed before it runs in production, and every run is logged. |
Building on the API is the right call when you have engineers and the integration is your product. When the goal is getting Smartsheet work off someone's desk, the build is the slow part.
What teams usually want the Smartsheet API for
Intake PDF Filing
Caddi extracts client and contract details from intake PDFs, renames and files them to the right submissions folder, and updates the submission tracker.
Email-to-row
Caddi reads inbound request emails and adds the structured row to the right Smartsheet with linked records and the right owner.
Sheet ↔ CRM sync
Caddi keeps a slice of CRM data mirrored into Smartsheet and writes any updates back to the source.
Status-change notification
When a Smartsheet row changes state, Caddi notifies the right channel in Slack or Teams with full context.
Smartsheet API questions
Does Smartsheet have an API?
Yes. Smartsheet has a REST API, authenticated with OAuth 2.0 or API access token (Bearer). The official documentation is at https://developers.smartsheet.com/api/smartsheet/introduction.
How do I get access to the Smartsheet API?
Customers only: Smartsheet names the required plan as Business, Enterprise, or Advanced Work Management.
Does the Smartsheet API have rate limits?
300 requests per minute per API token, and attachment uploads and cell-history calls count 10x each (so 30 per minute).
Can I connect Smartsheet to my other tools without writing code against its API?
Yes. With Caddi you show the Smartsheet task once, the way you'd train a new hire, and Caddi builds it as verified code that runs across Smartsheet and the other tools the job touches. Where a step has no API, Caddi uses a secure, audited browser session in the same automation.
Do I need a developer to automate Smartsheet with Caddi?
No. There is no integration code for you to write or maintain. Every automation Caddi builds for Smartsheet is reviewed before it runs in production, and every run is logged.
Connect Smartsheet without the build.
Drop your work email and pick a time. We'll show you Caddi running your Smartsheet workflow end to end.