# How to Integrate Bolt.new with Smartsheet

- Tool: Bolt.new
- Difficulty: Intermediate
- Time required: 30 minutes
- Last updated: April 2026

## TL;DR

Integrate Bolt.new with Smartsheet using a personal access token from Account → Personal Settings → API Access and the Smartsheet REST API v2. Fetch sheet data, read and update rows, build custom data management interfaces, and automate row creation from Bolt forms — all through a Next.js API route with Bearer token authentication. Smartsheet's spreadsheet-plus-project-management model makes it popular with enterprise PMOs.

## Building Custom Data Interfaces and Automations with Smartsheet and Bolt.new

Smartsheet's REST API v2 provides full access to sheets, rows, columns, cell values, attachments, and reports. With this API you can build data management interfaces that bridge Smartsheet's spreadsheet model with custom web experiences — intake forms that write rows directly to a Smartsheet, custom dashboards that aggregate data from multiple sheets, data validation layers that enforce business rules before rows are created, and reports formatted for specific stakeholders that Smartsheet's native views do not provide.

Smartsheet's data model is spreadsheet-centric: sheets have columns (defined by column IDs and types like TEXT_NUMBER, DATE, CONTACT_LIST, PICKLIST), and rows contain cells mapping to column IDs with typed values. This is more structured than Trello's card model but more accessible than Airtable's API. Understanding the column structure — specifically the column IDs for each sheet — is the key prerequisite for reading and writing data correctly.

Because all Smartsheet API communication uses outbound HTTP requests with Bearer token authentication, the entire integration works in Bolt's WebContainer development environment without deploying. You can fetch real sheet data, create rows, and update cell values from your Bolt app during development. Smartsheet webhooks — for real-time push notifications when sheets change — require a deployed public URL, but for most use cases where your app writes data into Smartsheet and reads it back on demand, no webhooks are needed.

## Before you start

- A Smartsheet account (free trial available, Pro required for API access with some features)
- A Smartsheet personal access token (Account → Personal Settings → API Access → Generate new token)
- A Next.js project in Bolt.new (prompt 'Create a Next.js app' to get started)
- Your sheet ID (found in the Smartsheet URL: app.smartsheet.com/sheets/{sheetId}) and its column IDs (fetched via the API)

## Step-by-step guide

### 1. Generate your Smartsheet access token and discover your sheet's column structure

Smartsheet personal access tokens provide API access on behalf of your account. To generate one, click your account avatar in the top-right of Smartsheet, go to Personal Settings → API Access → Generate new access token. Give it a descriptive name, copy the token immediately (Smartsheet shows it only once), and store it in a secure location.

Before you can write data to a Smartsheet, you must know the column IDs for your sheet. Smartsheet columns have internal numeric IDs that you use when creating or updating cells — the column name in the Smartsheet UI is not used in API calls. To discover your column IDs, call GET https://api.smartsheet.com/2.0/sheets/{sheetId} with your token. The response includes a 'columns' array with each column's id, title, type, and options (for PICKLIST columns).

Your sheet ID is the number in the Smartsheet URL: app.smartsheet.com/sheets/1234567890123456. Store it as SMARTSHEET_SHEET_ID in your .env.local file. After fetching the columns, copy the column IDs for the fields you will read and write — store them as comments in your API route for reference.

Smartsheet column types you will commonly encounter: TEXT_NUMBER (plain text or numbers), DATE (stores ISO date strings), CONTACT_LIST (stores email addresses linked to Smartsheet contacts), PICKLIST (dropdown with predefined options), CHECKBOX (boolean true/false), and AUTO_NUMBER (system-generated row numbers). Values are formatted differently depending on type — plain text for TEXT_NUMBER, ISO date strings for DATE, and email strings for CONTACT_LIST.

```
// .env.local
SMARTSHEET_ACCESS_TOKEN=your_personal_access_token
SMARTSHEET_SHEET_ID=your_sheet_id_from_url
```

**Expected result:** Calling /api/smartsheet/columns returns a JSON array of column objects with id, title, and type fields. Use these IDs when constructing row creation and update requests.

### 2. Fetch sheet rows and display them in a table

To fetch the full sheet including all rows and cells, call GET /sheets/{sheetId}. The response includes the sheet metadata, columns array, and rows array. Each row contains a 'cells' array where each cell has a columnId, value (the stored value), displayValue (the formatted string for display), and type. For PICKLIST cells, the value is the option string. For DATE cells, the value is an ISO date string. For CONTACT_LIST cells, the value is an email address.

For large sheets with hundreds of rows, use pagination: append ?pageSize=100&page=1 to fetch 100 rows at a time. The response includes totalCount and totalPages in the pagination object. Increase the page number to fetch subsequent batches.

To fetch only specific rows, use the rowIds query parameter: /sheets/{sheetId}/rows/{rowId} fetches a single row. The search endpoint GET /search/sheets/{sheetId}?query={searchTerm} finds rows containing specific text — useful for looking up rows by a unique identifier column.

For constructing a useful table display, build a mapping from column ID to column title using the columns array, then iterate through rows and cells to create objects keyed by column title. This gives you a readable data structure like { 'Client Name': 'Acme Corp', 'Status': 'Active' } rather than { '1234567': 'Acme Corp' }.

All GET operations work from Bolt's WebContainer — you will see your real Smartsheet data rendered in the Bolt preview without deploying.

```
// app/api/smartsheet/sheet-data/route.ts
import { NextRequest, NextResponse } from 'next/server';

const SMARTSHEET_API = 'https://api.smartsheet.com/2.0';
const ACCESS_TOKEN = process.env.SMARTSHEET_ACCESS_TOKEN;
const SHEET_ID = process.env.SMARTSHEET_SHEET_ID;

type SmartsheetColumn = { id: number; title: string; type: string };
type SmartsheetCell = { columnId: number; value: unknown; displayValue?: string };
type SmartsheetRow = { id: number; rowNumber: number; cells: SmartsheetCell[] };

export async function GET(request: NextRequest) {
  const { searchParams } = new URL(request.url);
  const page = searchParams.get('page') ?? '1';
  const pageSize = searchParams.get('pageSize') ?? '100';

  const response = await fetch(
    `${SMARTSHEET_API}/sheets/${SHEET_ID}?pageSize=${pageSize}&page=${page}`,
    { headers: { Authorization: `Bearer ${ACCESS_TOKEN}`, Accept: 'application/json' } }
  );

  if (!response.ok) {
    return NextResponse.json(
      { error: `Smartsheet API ${response.status}` },
      { status: response.status }
    );
  }

  const sheet = await response.json();

  // Build column ID → title map
  const colMap: Record<number, string> = {};
  for (const col of sheet.columns as SmartsheetColumn[]) {
    colMap[col.id] = col.title;
  }

  // Transform rows to human-readable objects
  const rows = (sheet.rows as SmartsheetRow[]).map((row) => {
    const record: Record<string, unknown> = { _id: row.id, _rowNumber: row.rowNumber };
    for (const cell of row.cells) {
      const colTitle = colMap[cell.columnId];
      if (colTitle) {
        record[colTitle] = cell.displayValue ?? cell.value ?? null;
      }
    }
    return record;
  });

  return NextResponse.json({
    rows,
    columns: sheet.columns.map((c: SmartsheetColumn) => ({ id: c.id, title: c.title, type: c.type })),
    totalRows: sheet.totalRowCount,
  });
}
```

**Expected result:** Calling /api/smartsheet/sheet-data returns rows as readable objects keyed by column title, and the React table renders your Smartsheet data with all column values visible and sortable headers.

### 3. Add rows and update cell values from Bolt forms

Adding rows to a Smartsheet requires a POST to /sheets/{sheetId}/rows with a 'cells' array where each cell specifies a columnId and value. The columnId is the numeric ID from your sheet's column list. The value format depends on the column type: strings for TEXT_NUMBER, ISO date strings (YYYY-MM-DD) for DATE, email strings for CONTACT_LIST, and boolean values for CHECKBOX.

You can add multiple rows in a single request by sending an array of row objects. Each row object must have a 'cells' array. Optionally include 'toBottom: true' to insert at the bottom of the sheet, or 'toTop: true' for the top. Without either, rows insert at the top by default.

Updating existing rows uses PUT /sheets/{sheetId}/rows with an array of row objects that include both the row 'id' and the 'cells' you want to change. Only include cells you want to update — omitted columns retain their existing values.

Deleting rows uses DELETE /sheets/{sheetId}/rows?rowIds={comma-separated row IDs}. This permanently removes rows and cannot be undone — consider updating a 'Status' or 'Archived' column to 'Deleted' instead for safer soft-deletion.

For PICKLIST columns (dropdowns), the cell value must exactly match one of the predefined options for that column. Fetch valid options from the columns endpoint: each PICKLIST column includes an 'options' array. Sending an invalid picklist value results in a 400 error.

These mutation operations are outbound HTTP calls that work perfectly in Bolt's WebContainer — you can test form submissions that create real Smartsheet rows during development without deploying first.

```
// app/api/smartsheet/rows/add/route.ts
import { NextRequest, NextResponse } from 'next/server';

const SMARTSHEET_API = 'https://api.smartsheet.com/2.0';
const ACCESS_TOKEN = process.env.SMARTSHEET_ACCESS_TOKEN;
const SHEET_ID = process.env.SMARTSHEET_SHEET_ID;

// Cache column map to avoid fetching on every request
let columnMapCache: Record<string, number> | null = null;

async function getColumnMap(): Promise<Record<string, number>> {
  if (columnMapCache) return columnMapCache;

  const res = await fetch(
    `${SMARTSHEET_API}/sheets/${SHEET_ID}?include=columnType`,
    { headers: { Authorization: `Bearer ${ACCESS_TOKEN}` } }
  );
  const sheet = await res.json();
  columnMapCache = {};
  for (const col of sheet.columns) {
    columnMapCache[col.title] = col.id;
  }
  return columnMapCache;
}

export async function POST(request: NextRequest) {
  const { rowData } = await request.json();

  if (!rowData || typeof rowData !== 'object') {
    return NextResponse.json({ error: 'rowData object is required' }, { status: 400 });
  }

  const colMap = await getColumnMap();

  const cells = Object.entries(rowData)
    .filter(([title]) => colMap[title] !== undefined)
    .map(([title, value]) => ({
      columnId: colMap[title],
      value,
    }));

  if (cells.length === 0) {
    return NextResponse.json({ error: 'No matching columns found in rowData' }, { status: 400 });
  }

  const response = await fetch(`${SMARTSHEET_API}/sheets/${SHEET_ID}/rows`, {
    method: 'POST',
    headers: {
      Authorization: `Bearer ${ACCESS_TOKEN}`,
      'Content-Type': 'application/json',
    },
    body: JSON.stringify([{ toBottom: true, cells }]),
  });

  if (!response.ok) {
    const error = await response.json();
    return NextResponse.json({ error: error.message }, { status: response.status });
  }

  const result = await response.json();
  const newRow = result.result[0];
  return NextResponse.json({ id: newRow.id, rowNumber: newRow.rowNumber });
}
```

**Expected result:** Submitting the intake form adds a new row to the bottom of your Smartsheet and returns the row number. The new row is immediately visible in the Smartsheet web interface with all form fields in the correct columns.

### 4. Deploy and set up Smartsheet webhooks for real-time updates

Smartsheet webhooks allow your app to receive real-time notifications when rows are added, updated, or deleted — without polling. This is valuable for keeping a Bolt dashboard synchronized with a Smartsheet that operations teams update continuously throughout the day.

To deploy, click the Publish button in Bolt to deploy to Netlify, or use Bolt's GitHub integration to push to a repository connected to Vercel. After deployment, add SMARTSHEET_ACCESS_TOKEN and SMARTSHEET_SHEET_ID as environment variables in your hosting platform's dashboard.

Smartsheet webhooks use a verification handshake similar to Asana: when you create a webhook, Smartsheet sends a challenge request with a X-Smartsheet-Hook-Challenge header, and your handler must echo it back in the response body as JSON: { smartsheetHookResponse: challengeValue }.

Create a webhook via POST https://api.smartsheet.com/2.0/webhooks with your token, specifying: callbackUrl (your deployed endpoint), name, scope ('sheet'), scopeObjectId (your sheet ID), and events (array of event types like ['*.*'] for all events or ['rows.created', 'rows.updated', 'rows.deleted'] for specific types). After creation, enable the webhook with PUT /webhooks/{webhookId} with { enabled: true }.

Webhook payloads contain a 'events' array with objects describing each change: eventType, objectType, id (row ID for row events), and timestamp. For row changes, fetch the updated row data using GET /sheets/{sheetId}/rows/{rowId} to get the current cell values.

Note that in Bolt's WebContainer development environment, your app runs inside the browser and has no public URL — Smartsheet cannot send webhook events to a browser-based runtime. Deploy first, then register and test webhooks against your production URL.

```
// app/api/smartsheet/webhook/route.ts
import { NextRequest, NextResponse } from 'next/server';

export async function POST(request: NextRequest) {
  // Smartsheet handshake: echo back the challenge header in the response body
  const challenge = request.headers.get('x-smartsheet-hook-challenge');
  if (challenge) {
    return NextResponse.json({ smartsheetHookResponse: challenge });
  }

  // Regular webhook events
  const payload = await request.json();
  const events = payload.events ?? [];

  for (const event of events) {
    console.log(`Smartsheet event: ${event.eventType} on ${event.objectType}`, {
      id: event.id,
      timestamp: event.timestamp,
    });
  }

  return NextResponse.json({ received: events.length });
}
```

**Expected result:** After deploying and enabling the Smartsheet webhook, your handler receives real-time event notifications when rows are added or updated. The server logs show the event type, object type, and row ID for each change.

## Best practices

- Discover and cache column IDs at startup rather than hardcoding them — Smartsheet column IDs change if columns are deleted and recreated, and caching avoids an extra API call on every row operation.
- Use the Smartsheet SDK (@smartsheet-platform/smartsheet-javascript-sdk) for complex operations — it handles pagination, retry logic, and type definitions automatically, though the package must be pure JavaScript compatible with Bolt's WebContainer.
- For PICKLIST columns, always validate that submitted values match one of the column's allowed options before sending to the Smartsheet API — invalid option strings cause 400 errors without clear messages.
- Never expose your Smartsheet access token in client-side code — all Smartsheet API calls must go through server-side Next.js API routes where the token is accessed via process.env.
- For sheets with many rows, use the rowIds parameter to fetch only the rows you need rather than fetching the entire sheet — this dramatically reduces response size for large operational sheets.
- Implement soft-deletion by updating a Status column to 'Archived' or 'Deleted' rather than calling the DELETE row API — permanently deleted rows cannot be recovered and may break references in linked reports.
- Test webhook integrations against a development or staging sheet before pointing at your production sheet — webhook-triggered automations may perform unintended updates if the logic has bugs.

## Use cases

### Project intake form that writes to Smartsheet

Build a client-facing project intake form in Bolt where clients submit project details. When submitted, a new row is automatically added to a Smartsheet tracker with all form fields mapped to the correct columns, instantly visible to the project management team without manual data entry.

Prompt example:

```
Build a project intake form in Next.js with fields: client name, project type (dropdown: website/app/branding), budget range, timeline, and description. When submitted, call /api/smartsheet/rows/add to create a new row in my Smartsheet with these fields mapped to their column IDs from SMARTSHEET_SHEET_ID. Show a confirmation with the row number on success.
```

### Custom resource allocation dashboard

Pull data from multiple Smartsheets tracking team capacity, project workload, and client commitments to build a consolidated resource allocation view that highlights over-allocated team members and upcoming capacity gaps — information that requires pivoting across multiple sheets in Smartsheet.

Prompt example:

```
Build a resource dashboard page that fetches data from two Smartsheets: a team capacity sheet and a project assignments sheet. Match team members across both sheets by email column. For each team member, display: total allocated hours vs capacity hours, a progress bar showing utilization percentage, and the list of assigned projects. Highlight any team members over 100% capacity in red.
```

### Automated row status updater from external events

When an external event occurs in your app — a payment is confirmed, a support ticket is resolved, or a delivery is completed — automatically find the corresponding row in a Smartsheet tracker and update its status column and completion date, keeping the Smartsheet as the single source of truth for operations teams.

Prompt example:

```
Build a /api/smartsheet/update-status route that finds a row in my Smartsheet by matching an external ID column value, then updates the Status column (column ID [COL_ID]) to 'Complete' and the Completed Date column (column ID [COL_ID]) to today's date. Accept: externalId (to search by) and newStatus (string). Use the Smartsheet search API to find the row, then update it.
```

## Troubleshooting

### API calls return 401 Unauthorized even with what looks like a valid token

Cause: The Authorization header format is incorrect. Smartsheet requires the exact Bearer token format. The token may also have been revoked or expired (tokens can expire based on settings). Additionally, some Smartsheet API operations require a Premium plan — free accounts have API access limitations.

Solution: Verify your token is active in Account → Personal Settings → API Access. Check the Authorization header is exactly: Authorization: `Bearer ${process.env.SMARTSHEET_ACCESS_TOKEN}`. Test the token by calling GET https://api.smartsheet.com/2.0/users/me — if that returns your user info, the token is valid and the issue is elsewhere.

```
// Correct Smartsheet auth header format:
headers: {
  Authorization: `Bearer ${process.env.SMARTSHEET_ACCESS_TOKEN}`,
  Accept: 'application/json',
}
```

### Row creation returns 400 with 'Invalid column ID' error

Cause: One of the column IDs in the cells array does not exist in the target sheet. This happens when column IDs are hardcoded and the sheet structure is later modified, or when the wrong sheet ID is used.

Solution: Refresh your column ID map by calling /api/smartsheet/columns to get the current column IDs. Column IDs change if columns are deleted and recreated. Ensure SMARTSHEET_SHEET_ID in your .env points to the correct sheet. Use the dynamic column map approach (as shown in step 3) instead of hardcoding column IDs.

### Webhook registration succeeds but no events are received after enabling

Cause: The webhook is created but not enabled — Smartsheet webhooks require a separate enable step after creation. Alternatively, the callbackUrl is not publicly accessible (Bolt's WebContainer has no public URL during development), or the webhook challenge handshake failed during registration.

Solution: After creating the webhook, call PUT /webhooks/{webhookId} with { enabled: true } to activate it. Verify your deployed URL is publicly accessible. Check the webhook status with GET /webhooks/{webhookId} — the status field should show 'ENABLED'. If status shows 'DISABLED_HANDSHAKE_FAILED', your webhook handler did not correctly respond to the challenge.

```
// Enable the webhook after creating it:
const enableResponse = await fetch(
  `https://api.smartsheet.com/2.0/webhooks/${webhookId}`,
  {
    method: 'PUT',
    headers: { Authorization: `Bearer ${ACCESS_TOKEN}`, 'Content-Type': 'application/json' },
    body: JSON.stringify({ enabled: true }),
  }
);
```

## Frequently asked questions

### How do I connect Bolt.new to Smartsheet?

Generate a personal access token from Account → Personal Settings → API Access in Smartsheet and add it as SMARTSHEET_ACCESS_TOKEN in your .env.local file. Use Bolt chat to generate Next.js API routes calling the Smartsheet REST API v2 with Bearer token authentication. Discover your sheet's column IDs by calling the /sheets/{sheetId} endpoint — these numeric IDs are required for all row read and write operations.

### Can I test the Smartsheet integration in Bolt's preview before deploying?

Yes, for all read and write operations. Fetching sheet data, creating rows, updating cells, and searching are all outbound HTTP requests that work in Bolt's WebContainer preview. The only limitation is incoming Smartsheet webhooks, which require a publicly accessible URL and therefore need a deployed app.

### Why do I need column IDs instead of column names when writing data?

Smartsheet's API identifies columns by their internal numeric IDs, not their display names. Two columns can have the same name, so IDs are used for precision. Call GET /sheets/{sheetId} to retrieve the columns array, which includes each column's id, title, and type. Store these IDs in your code or cache them in your application.

### How do I handle Smartsheet PICKLIST (dropdown) columns via the API?

PICKLIST columns only accept values that match one of their predefined options exactly. Fetch valid options from the columns response — each PICKLIST column includes an 'options' array of allowed strings. In your form or API, validate submitted values against this list before sending to Smartsheet. Sending an invalid option string returns a 400 error.

### What is Smartsheet's API rate limit?

Smartsheet limits API calls to 300 requests per minute per access token on most plan tiers. Enterprise plans have higher limits. If you exceed the limit, the API returns a 429 response with a Retry-After header. For dashboard applications loading sheet data on page load, this limit is rarely an issue.

---

Source: https://www.rapidevelopers.com/bolt-ai-integrations/smartsheet
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