---
title: "Google Integration API — Skip CASA Assessment | Truto"
description: "Access Gmail, Calendar, Contacts, and Drive APIs without the $15K–$75K CASA assessment. Truto's pre-verified Google OAuth gives you instant access at $10 per connection. A better Nylas alternative."
canonical: https://truto.one/google/
---

Google Integration

# Google Integration Without the $75,000 Headache

Truto has already completed Google’s CASA Tier 2 security assessment. Your app gets verified Gmail, Calendar, Contacts, and Drive access for $10 per connection. No $15K–$75K annual audits. No months of waiting. Ship today.

[Talk to Us](https://cal.com/truto/partner-with-truto) [View Docs](https://truto.one/docs/)

![SOC 2 Type II](/images/footer/compliance/soc2.svg)SOC 2 ![ISO 27001](/images/footer/compliance/iso27001.svg)ISO 27001 ![GDPR](/images/footer/compliance/gdpr.svg)GDPR ![HIPAA](/images/footer/compliance/hipaa.svg)HIPAA ![CCPA](/images/footer/compliance/gdpr.svg)CCPA

The problem

## The Google Tax on Every SaaS Builder

### CASA Tier 2 Assessment

Google requires apps accessing restricted scopes like Gmail to pass a CASA Tier 2 security assessment. Cost: $15,000 to $75,000. Timeline: weeks to months. And it renews every year.

### Shared OAuth App Risk

Some platforms offer a shared Google OAuth app so you can skip verification. But if Google suspends that shared app, every customer on that platform loses access instantly. Your integration, their kill switch.

### Engineering Time Drain

Even after verification, you are maintaining OAuth flows, handling token refresh, managing scopes, dealing with rate limits, and parsing inconsistent API responses across Gmail, Calendar, Contacts, and Drive.

The solution

## Truto Handles All of It. You Just Build.

Truto has already completed Google’s CASA Tier 2 security assessment. When your users connect their Google account through Truto, they are authorizing through our verified OAuth app. You get real-time access to their data via Truto’s unified API. No verification process. No security assessment fees. No shared app risk because Truto provisions per-tenant OAuth scopes.

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### Gmail

Read and sync message summaries, fetch full message bodies, update read/unread state, manage labels, send and reply to emails.

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### Google Calendar

Full CRUD on events, recurring event support, attendee management, calendar listing and scheduling.

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### Google Contacts

Read, create, update, and delete contacts. Sync contact groups and metadata.

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### Google Drive

List, read, create, and manage files and folders. Access file metadata and permissions.

Compare

## How Truto Compares

DIY

Nylas

Truto Recommended

Google CASA Assessment

$15K–$75K annually. You manage the entire process.

Use their shared OAuth app (single point of failure) or do your own CASA.

Already completed. Included in your plan.

Time to Ship

Weeks to months for verification alone.

Days if using shared app, months if doing own verification.

Minutes. Connect and start making API calls.

Total Cost at 100 Accounts

$1,250–$6,250/mo CASA amortized + infra.

$205/mo + $1,250–$6,250/mo CASA (if not sharing their OAuth app).

$1,000/mo. CASA included. No hidden costs.

Data Privacy

You control everything.

Nylas caches and processes data on their servers.

Zero data storage. Real-time passthrough. Data goes directly from Google to you.

Shared OAuth App Risk

None, you own the app.

Yes. If their shared app is suspended, all customers lose access.

None. Per-tenant OAuth. No single point of failure.

Lock-in

None.

Dependent on their shared OAuth infrastructure.

None. Migrate to your own CASA-verified OAuth app anytime.

Pricing

## Simple Pricing. No Surprises.

$10 /connection/month

-   undefined Pre-verified Google CASA Tier 2 OAuth
-   undefined Gmail, Calendar, Contacts, and Drive access
-   undefined Unlimited API calls
-   undefined Real-time data — zero caching or storage
-   undefined Custom field mapping with JSONata
-   undefined MCP server support for AI agents
-   undefined Direct Slack access to Truto engineering
-   undefined No annual CASA renewal fees
-   undefined Migrate to your own OAuth anytime

[Talk to Us](https://cal.com/truto/partner-with-truto)

Need enterprise volume pricing? [Talk to us](https://cal.com/truto/partner-with-truto).

How it works

## Live in 3 Steps

1.  ### Connect your users

    Embed Truto’s pre-built auth flow (Link) or redirect users to our hosted consent screen. They see a standard Google OAuth prompt — verified by Google, secured by CASA.

2.  ### Call the Unified API

    Use one endpoint to read Gmail messages, list calendar events, fetch contacts, or manage Drive files. No token management. No scope juggling. Truto handles refresh tokens, rate limits, and retries.

3.  ### Migrate when ready

    When you outgrow Truto’s shared OAuth (or want to brand the consent screen), complete your own CASA assessment and plug in your OAuth credentials. No reauthorization. No user disruption.

Developer experience

## One API Call. Real-Time Data.

```bash
# List Gmail messages for a connected user
curl https://api.truto.one/unified/messaging/messages \
  -H "Authorization: Bearer TRUTO_API_KEY" \
  -H "X-Integration-Id: google_mail" \
  -H "X-Connected-Account-Id: acct_abc123"
```

Same pattern for Calendar (`/scheduling/events`), Contacts (`/crm/contacts`), and Drive (`/file-storage/files`). Full API docs at [truto.one/docs](https://truto.one/docs/).

FAQ

## Common Questions

## Stop Paying Google’s $75K Toll

Get verified Gmail, Calendar, Contacts, and Drive access for $10 per connection.

[Talk to Us](https://cal.com/truto/partner-with-truto)