Smartsheet API
Smartsheet's REST API for programmatically reading and writing rows, sheets, reports, and attachments in Smartsheet — a spreadsheet-based project and work management platform popular in enterprise environments.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
TLS enforced. OAuth2 scopes are well-defined for limiting agent access. FedRAMP authorized version available for US government. Enterprise tier adds admin-level token controls and audit logs.
⚡ Reliability
Best When
An agent needs to automate data entry, status updates, or reporting in an enterprise environment where Smartsheet is the established platform for project tracking.
Avoid When
You need fast bulk writes, complex queries, or your organization isn't already using Smartsheet.
Use Cases
- • Reading project plan data from Smartsheet sheets for automated status reporting
- • Updating row values and cell data in Smartsheet sheets from agent workflows
- • Creating new rows for task intake automation (form-to-sheet pipelines)
- • Syncing Smartsheet data with external databases or ERP systems via REST API
- • Triggering Smartsheet automations and sending update requests from agent logic
Not For
- • Teams not using Smartsheet as their project management or data management tool
- • High-frequency transactional writes — Smartsheet is designed for human-scale update rates
- • Complex relational data with foreign key relationships (use a proper database)
Interface
Authentication
Personal access tokens for direct agent use. OAuth2 for user-context applications with scoped permissions (READ_SHEETS, WRITE_SHEETS, SHARE_SHEETS, etc.). Tokens are user-scoped — agent token inherits user's sheet access.
Pricing
API access requires at least a Pro plan. Business adds automated workflows and advanced reporting. Enterprise adds governance, compliance controls, and Smartsheet Gov for US federal use.
Agent Metadata
Known Gotchas
- ⚠ Rows are identified by row ID (not position) — agents must fetch row IDs before updating specific rows
- ⚠ Column IDs are required for cell updates, not column names — requires metadata call to get column ID map
- ⚠ Sheet sharing and access is user-based — agent token only accesses sheets the user account can see
- ⚠ Webhook payload only includes changed cell data, not full row — agents may need a follow-up row fetch
- ⚠ Formula cells are read-only via API — agents cannot write to cells containing formulas
- ⚠ Smartsheet's API versioning is stable but resource limits (rows per sheet, sheets per account) can surprise agents
Alternatives
Full Evaluation Report
Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for Smartsheet API.
Scores are editorial opinions as of 2026-03-06.