Billing

Monthly Free Tier

All App Services Apps in a MongoDB Atlas project share a single monthly free tier. All usage below the free tier thresholds in a given month is not billed. As soon as a project exceeds any monthly free tier threshold, App Services starts billing for additional usage of any kind for that project.

Invoicing and Payment

App Services is billed as part of MongoDB Atlas. All payment methods that work with Atlas can be used to pay for App Services, including prepaid Atlas Credits. Any costs associated with a linked Atlas data source, such as database operations and backup, are billed separately from App Services.

See MongoDB Atlas Billing for more information.

App Services Requests

App Services counts the number of requests that an application receives and handles. Requests are billed at a set rate for each request.

There are several types of requests:

• Function Executions, such as when a user calls a function from a client app or when a function calls an external service. If an executing function calls another function, App Services considers both executions as part of the same request.

• Trigger Executions, such as when a database trigger matches a change event, a scheduled trigger is configured to fire, or an authentication trigger responds to a user login. The request resulting from a trigger execution also includes all operations invoked by the trigger, including functions.

• GraphQL Requests, such as when a client application issues a GraphQL query operation or calls a custom resolver.

• HTTPS Requests, such as when an external service sends a notification event or interaction payload to an incoming webhook or HTTPS endpoint.

• Sync Operations, such as when a sync client uploads a changeset, when App Services resolves a conflict in an uploaded changeset, or when App Services sends changesets to a connected sync client.

  For more information on sync operations, see Atlas Device Sync Protocol.

All incoming requests count toward your monthly usage except for the following:

• Requests to an authentication provider

• Requests blocked by an application's IP Access List

• Requests to an invalid HTTP endpoint

Price: $2.00 / 1,000,000 requests ($0.000002 / request)

Formula: (Function Executions + Trigger Executions + GraphQL/Webhook/HTTPS Endpoint Requests + Sync Updates) * $0.000002

Free Tier Threshold: 1,000,000 requests or 500 hours of compute or 10,000 hours of sync runtime (whichever occurs first)

App Services Compute

App Services counts the total amount of time and memory that each non-sync application request takes to process. Compute is billed at a set rate for each millisecond of runtime. For large requests, this rate is multiplied by a factor that reflects the amount of memory the request used.

The memory multiplier begins at 1 (i.e. it does not affect your billing rate) and increases by 1 for every 32MB of memory that a given request uses.

Price: $10.00 / 500 runtime hours (~$0.000000005 / ms)

Formula: (# Requests) * (Runtime (ms)) * (Memory (MB) / 32MB) * $0.000000005 / ms

Free Tier Threshold: 1,000,000 requests or 500 hours of compute or 10,000 hours of sync runtime (whichever occurs first)

Atlas Device Sync

App Services counts the total amount of time in which a client application user has an active connection to the sync server even if they are not transferring data at the time. Sync is billed at a set rate for each millisecond of sync runtime per user.

Price: $0.08 / 1,000,000 runtime minutes ($0.00000008 / min)

Formula: (# Active Users) * (Sync time (min / user)) * ($0.00000008 / min)

Free Tier Threshold: 1,000,000 requests or 500 hours of compute or 10,000 hours of sync runtime (whichever occurs first)

Device Sync pauses automatically after 30 days of inactivity.

Data Transfer

App Services measures the total amount of data that your application sends out to client applications and external services. Data transfer is billed at a set rate for each gigabyte of data egress.

Price: $0.12 per GB

Formula: (Data sent to clients/services (GB)) * ($0.12 / GB)

Free Tier Threshold: 10GB

Mobile Application

A group messaging application uses App Services to manage permissions and sync messages between users in the same group. The app has the following usage:

• There are around 2,000 active group chats in any given month.

• The average group chat has 4 users that each send around 900 messages each month.

• Messages are usually small but may contain up to 2KB of data.

• The average user has the app open for about 9 hours each month.

The following calculations approximate the cost of running this application for one month:

Web Application

A hardware store uses a web application that allows customers to browse and order items online. The app uses Atlas Functions and the GraphQL API to fetch items based on a user's search, get detailed information for specific items, and submit orders. The app has the following usage:

• There are around 100,000 visitors each month

• An average visitor performs 2 searches, looks at 10 items, and submits an order 20% of the time.

• Search results, item data, and order requests contain 4KB or less

The following calculations approximate the cost of running this application for one month:

Backend Application

A regional pizza chain uses App Services to handle orders for all of its restaurants. The app has the following usage:

• The chain has 25 stores and each store gets about 12,000 orders each month

• For each order, a database trigger sends the customer an email receipt. Another trigger sends text message updates to the customer when their order is received, when it's sent out for delivery, and when it's about to be delivered.

• A scheduled trigger runs every 5 minutes to monitor delivery times. If a delivery is taking too long, it sends a text message update to the user. About 10% of all deliveries take too long.

• Orders vary in size but are no larger than 4KB