> ## Documentation Index
> Fetch the complete documentation index at: https://smartcar.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Implementation Checklist

> Use this guide to track your progress through the Smartcar integration process, from initial setup to production launch.

## Phase 0: Pre-Kickoff

* **Tech Stack:** Identify technology stack for implementation and explore appropriate SDKs ([frontend](https://smartcar.com/docs/connect/connect-sdks) and [backend](https://smartcar.com/docs/api-reference/api-sdks)) and [getting started resources](https://smartcar.com/docs/getting-started/introduction).
* **Tesla Tenanting:** (*Enterprise Only*) Check in with your Solution Architect to ensure you have your Tesla Tenant set up enabling your org to have a [Virtual Key with your own brand name](https://smartcar.com/docs/help/oem-integrations/tesla/virtual-key-tesla#enterprise-plan).
* **Slack Channel**: (*Enterprise Only*) Smartcar will set up a [dedicated Slack channel](https://smartcar.com/docs/help/assist-ai-slack) for technical communications - ensure the relevant stakeholders are added.

## Phase 1: Application Setup & Security Foundation

* **Team Access:** [Invite relevant team members](https://smartcar.com/docs/getting-started/dashboard/teams#members) to your Smartcar Dashboard account.
* **Subscribe to Updates:** Ensure your team subscribes to [status.smartcar.com](https://status.smartcar.com), [brandreliability.smartcar.com](https://brandreliability.smartcar.com) and [product changelogs](https://smartcar.com/docs/changelog/latest) to stay informed on platform health and updates.
* **Environment Setup:** Create distinct **Test** and **Production** applications in the dashboard with clear naming conventions.
* **Credentials:** Capture and securely store your `Client ID` and `Client Secret`.
* **Secret Management:** Integrate your `Client Secret` into an enterprise secrets management system (e.g. AWS Secrets Manager, Vault). **Never commit secrets to version control.**
* **Connect Configuration:** Set each application’s Privacy Policy URL and Logo.
* **Redirect URIs:** Configure the Redirect URI for each application (ensure they are externally accessible).
* **Scope Definition:** [Define your Vehicle Access Configuration](https://smartcar.com/docs/getting-started/how-to/configure-permissions#how-to-configure-permissions-for-vehicle-data-collection) (OAuth scopes) based on the specific signals and commands your application requires.
* **Scope Minimization:** Strictly enforce **Scope Minimization** by requesting only the minimum necessary data permissions from the user.
* **Brand Select:** Confirm and specify which OEM Brands will be displayed to the user and if you want to automatically add any new brands as they become available.
* **Compatibility Check:** *(Enterprise Only)* Validate target vehicle compatibility using the [Region and Make Compatibility API](https://smartcar.com/docs/api-reference/compatibility/by-region-and-make).

## Phase 2: Connect Flow & Conversion Optimization

* **User Journey:** Determine how your application will funnel users into the Smartcar Connect flow.
* **Frontend Implementation:** Implement the frontend Connect flow to generate the authorization URL (using `link.getAuthUrl()`).
* **First Connection:** Onboard your first test vehicle and review its data in the Smartcar Dashboard.
* **Brand Select:** Assess and implement [**Brand Select**](https://smartcar.com/docs/connect/advanced-config/flows#bypassing-the-brand-selection-screen) functionality (if applicable) to skip the brand selection screen and accelerate the user flow.
* **Error Simulation:** Validate your application’s error handling by testing with [simulated error VINs ](https://smartcar.com/docs/errors/testing-errors#testing-errors)(e.g., using the `invalid_subscription` trigger).

## Phase 3: Core Implementation & Token Resilience

* **Architecture**: Design the backend architecture.
* **Webhook Endpoint:** Implement a [backend endpoint to receive webhook data](https://smartcar.com/docs/integrations/webhooks/receiving-webhooks) and error payloads.
* **Callback Endpoint:** Implement a backend endpoint to receive the `user_id` and `state` at your [Redirect URI](https://smartcar.com/docs/connect/handle-the-response) when a user completes the Connect flow.
* **Application Access Token:** Implement the logic to [request an application-level access token](https://smartcar.com/docs/api-reference/authorization/request-access-token) using the OAuth 2.0 Client Credentials flow (`grant_type=client_credentials`). The access token is valid for **1 hour**. There is no refresh token.
* **Secure Storage:** Securely store your `Client Secret` using an enterprise secrets management system (e.g. AWS Secrets Manager, Vault). The access token can be cached in memory or a secure cache for its 1-hour lifetime. Tokens must never be stored client-side.
* **Proactive Renewal:** Implement logic to request a new access token before the 1-hour expiration window closes. A simple timer or check before each API call is sufficient.
* **Support Protocol:** Establish internal support protocols to handle questions from your vehicle owners (ensure your team acts as Tier 1 support before escalating to Smartcar).

## Phase 4: Operational Scale & Error Handling

* **Webhooks-First:** *(If migrating)* Shift data ingestion models from polling to a **Webhooks-First** architecture for real-time scalability.
* **Webhook Configuration:** Configure Webhook integrations in the Smartcar Dashboard (select triggers, set callback URI).
* **Payload Verification:** Implement the mandatory callback URI verification logic (responding to the `VERIFY` event with the challenge hash).
* **User Error Handling:** Map Connect errors (e.g. `no_vehicles`) to clear, actionable messages for your users.
* **Vehicle Error Handling:** Handle `VEHICLE_ERROR` events and trigger user notifications when specific vehicle owner actions are required to resolve the issue.
* **Re-authentication:** Implement resolution logic for `ACCOUNT_ISSUE` errors by prompting the user to re-authenticate via Smartcar Connect.
* **Rate Limiting:** Implement **Exponential Backoff** strategies for retrying API errors (429) and adhere to `Retry-After` headers.

## Phase 5: Production Readiness Review

* **Access Control:** Ensure all service-specific IAM roles adhere to the principle of least privilege.
* **Secret Management:** Verify all secrets are stored and accessed via a dedicated secrets manager.
* **Encryption:** Ensure data is encrypted at rest and in transit.
* **Vulnerability Scanning:** Confirm that dependency and vulnerability scans pass with zero critical/high issues.
* **Network Security:** Configure firewalls/security groups to block unauthorized ports and apply WAF rules where appropriate.
* **Logging:** Ensure structured logs are successfully ingested for staging and production environments, with configurable log levels.
* **Observability:** Configure a dashboard to capture essential metrics (Latency, Error Rate, Traffic).
* **Alerting:** Configure critical alerts to route to your on-call channels.
* **CI/CD:** Ensure a fully automated build and deployment pipeline is in place for all environments.
* **Infrastructure as Code (IaC)**: The service infrastructure is managed using IaC (e.g., Terraform, CDK).
* **Architecture Review Complete:** The service architecture has passed the formal review.
* **Service Runbook:** A complete runbook exists detailing: service owners, quick start, deployment, scaling, and incident response.
* **Tagging:** Tagging policy is applied to infrastructure.
* **Support Review:** Review the vehicle owner support approach again and ensure VO's are not channeled to Smartcar support directly and that Smartcar support is used as Tier 3