# MongoDB Connection Strings in API Maker

> Learn MongoDB URI formats for API Maker:- use standalone, replica-set, or sharded cluster connections with examples and parameters.

Source: https://docs.apimaker.dev/v1/docs/Database-connection-string/mongodb-connection-strings.html

## Introduction

When connecting MongoDB to API Maker, the **connection string** defines how your API Maker instance communicates with your MongoDB database. Whether you’re using **MongoDB Atlas**, a self-hosted MongoDB instance, or a cloud provider’s managed service, the correct connection string is essential for secure and reliable data access.

In this guide, we’ll explain connection string formats, parameters, examples, troubleshooting tips, and best practices to help you integrate MongoDB with API Maker effectively.

---

## MongoDB Connection String Format

Below is a **visual breakdown** of the MongoDB connection string.

```
mongodb[+srv]://[username:password@]host1[:port1][,host2[:port2],...]/[defaultDatabase][?options]

 └───┬─────┘  └───────┬────────┘ └───────┬────────────┘ └───────┬───────────┘ └───────┬───────────┘
     │                │                  │                      │                     │
Protocol (scheme)     │                  │                      │                     │
(mongodb or mongodb+srv)Credentials   Host(s) + Ports        Default Database      Options
```

## MongoDB Connection String Examples

### 🧩 Connection String Parts Explained

- **Protocol (scheme):**
    - `mongodb://` → Standard connection (manual host list).
    - `mongodb+srv://` → DNS seed list (Atlas, auto-discovery).

- **Credentials (optional):**
    - Format: `username:password@`.
    - Use URL-encoding for special characters in password (`p@ss` → `p%40ss`).

- **Host(s) + Ports:**
    - Single host → `localhost:27017`
    - Multiple hosts (replica set/sharded cluster) → `host1:27017,host2:27017,host3:27017`

- **Default Database (optional):**
    - After `/`, e.g., `/mydb`.
    - Used when none specified in queries.

- **Options (query params):**
    - After `?`, key-value pairs separated by `&`.
    - Example: `?retryWrites=true&w=majority&ssl=true`

---

### Basic Localhost Connection

```text
mongodb://localhost:27017
```

### Localhost with Database Name

```text
mongodb://localhost:27017/mydb
```

### Localhost with Username & Password

```text
mongodb://user:password@localhost:27017/mydb
```

### Localhost with Authentication Database

```text
mongodb://user:password@localhost:27017/mydb?authSource=admin
```

### Replica Set Connection

```text
mongodb://host1:27017,host2:27017,host3:27017/mydb?replicaSet=myReplicaSet
```

### Connection with SRV Record (Atlas)

```text
mongodb+srv://cluster0.mongodb.net/mydb
```

### Atlas with Username & Password

```text
mongodb+srv://user:password@cluster0.mongodb.net/mydb
```

### Connection with SSL/TLS Enabled

```text
mongodb://user:password@localhost:27017/mydb?ssl=true
```

### Connection with Retry Writes

```text
mongodb+srv://user:password@cluster0.mongodb.net/mydb?retryWrites=true&w=majority
```

### Connection with Read Preference

```text
mongodb://user:password@localhost:27017/mydb?readPreference=secondary
```

### Connection with Write Concern

```text
mongodb://user:password@localhost:27017/mydb?w=majority&wtimeoutMS=5000
```

### Connection with Connection Pool Size

```text
mongodb://user:password@localhost:27017/mydb?maxPoolSize=50&minPoolSize=5
```

### Connection with Timeouts

```text
mongodb://user:password@localhost:27017/mydb?connectTimeoutMS=3000&socketTimeoutMS=5000
```

### Advanced Atlas Example with Multiple Options

```text
mongodb+srv://user:password@cluster0.mongodb.net/mydb?retryWrites=true&w=majority&readPreference=secondaryPreferred&connectTimeoutMS=10000
```

### Complex Replica Set with SSL, Pooling & App Name

```text
mongodb://user:password@host1:27017,host2:27017,host3:27017/mydb?replicaSet=myReplicaSet&ssl=true&maxPoolSize=100&appName=MyApp&authSource=admin
```

---

## Connection string parts breakdown

| Part                        | Description                                                                 | Example                               |
|-----------------------------|-----------------------------------------------------------------------------|---------------------------------------|
| **Scheme**                  | Protocol prefix: `mongodb://` (manual hosts) or `mongodb+srv://` (DNS SRV). | `mongodb://`, `mongodb+srv://`        |
| **Username** (optional)     | Database username for authentication.                                       | `user`                                |
| **Password** (optional)     | Password for authentication (URL-encoded if special chars).                 | `p%40ss` for `p@ss`                   |
| **@**                       | Separator between credentials and host(s).                                  | `user:password@`                      |
| **Host(s)**                 | One or more MongoDB server addresses.                                       | `localhost`, `cluster0.mongodb.net`   |
| **defaultauthdb**           | Default authentication database (often `admin`).                            |
| **Port** (optional)         | Port number (default: `27017`).                                             | `:27017`                              |
| **Comma-separated Hosts**   | Multiple hosts for replica sets or sharded clusters.                        | `host1:27017,host2:27017,host3:27017` |
| **/** (slash after hosts)   | Separator between hosts and default database.                               | `/`                                   |
| **Default Database**        | Database to connect to if none specified in queries.                        | `mydb`                                |
| **?options** (query params) | Connection options in `key=value` format (chained with `&`).                | `?retryWrites=true&w=majority`        |

---

## Connection string options breakdown and explanation

| Parameter                 | Description                                                              | Example Value                                |
|---------------------------|--------------------------------------------------------------------------|----------------------------------------------|
| **authSource**            | Database to authenticate against (default: `admin`).                     | `authSource=admin`                           |
| **replicaSet**            | Name of the replica set to connect to.                                   | `replicaSet=myReplicaSet`                    |
| **ssl / tls**             | Enable SSL/TLS for connections.                                          | `ssl=true`                                   |
| **retryWrites**           | Enables retryable writes (recommended for MongoDB Atlas).                | `retryWrites=true`                           |
| **w**                     | Write concern (acknowledgement level for writes).                        | `w=majority`, `w=1`                          |
| **wtimeoutMS**            | Timeout (ms) for write concern acknowledgment.                           | `wtimeoutMS=5000`                            |
| **readPreference**        | Which members to read from (`primary`, `secondary`, `nearest`).          | `readPreference=secondary`                   |
| **maxPoolSize**           | Maximum number of connections in the connection pool.                    | `maxPoolSize=100`                            |
| **minPoolSize**           | Minimum number of connections in the pool.                               | `minPoolSize=5`                              |
| **connectTimeoutMS**      | Maximum time (ms) to wait for a connection.                              | `connectTimeoutMS=3000`                      |
| **socketTimeoutMS**       | Timeout (ms) for socket inactivity before closing.                       | `socketTimeoutMS=5000`                       |
| **appName**               | Custom name for the application (useful for monitoring in MongoDB logs). | `appName=MyApp`                              |
| **readConcernLevel**      | Level of isolation for reads (`local`, `majority`, `linearizable`).      | `readConcernLevel=majority`                  |
| **tlsCAFile**             | Path to Certificate Authority (CA) file for TLS validation.              | `tlsCAFile=/etc/ssl/ca.pem`                  |
| **tlsCertificateKeyFile** | Path to TLS key+cert file for client authentication.                     | `tlsCertificateKeyFile=/etc/ssl/mongodb.pem` |
| **compressors**           | Enable network compression (`zlib`, `snappy`, `zstd`).                   | `compressors=zlib`                           |
| **journal**               | If writes should be committed to the journal.                            | `journal=true`                               |
| **directConnection**      | Connect directly to a single host, bypassing replica set discovery.      | `directConnection=true`                      |
| **srvMaxHosts**           | Limits the number of hosts when using `mongodb+srv`.                     | `srvMaxHosts=3`                              |

---

## Secure Connection Best Practices

- Always use **SRV connection strings** for MongoDB Atlas.

- Enable **SSL/TLS** to encrypt data in transit.

- Avoid hardcoding credentials in code. Use **API Maker Secrets Management**.

- Restrict database user permissions to only what’s necessary.

- Use **environment variables** to manage sensitive credentials.

---

## Connecting MongoDB in API Maker

1. Go to **API Maker Secret Management** > **Default**.

2. Choose **MongoDB** as the database type.

3. Paste your connection string.

4. Test the connection to verify credentials and permissions.

Once connected, you can:

- Create **schemas** for collections.

- Use `/api/schema/...` endpoints for optimized queries.

- Leverage **Deep Populate** to join MongoDB with other databases.

---

## Troubleshooting

When connecting to MongoDB (local, self-hosted, or cloud like Atlas), you may encounter several common errors.  
Below is a categorized list with explanations:

### 🔑 Authentication & Authorization Errors

| Error Code | Name                 | Description                                            | Common Fix                                          |
|------------|----------------------|--------------------------------------------------------|-----------------------------------------------------|
| 2          | BadValue             | Invalid parameter or option.                           | Check query syntax or field types.                  |
| 13         | Unauthorized         | User lacks required permissions.                       | Grant appropriate roles with `db.grantRolesToUser`. |
| 18         | AuthenticationFailed | Invalid username/password.                             | Verify credentials and authentication database.     |
| 8000       | AtlasError (generic) | MongoDB Atlas returned a generic error.                | Check Atlas logs for specific issue.                |
| 8001       | AtlasUnauthorized    | Atlas rejected request due to insufficient privileges. | Verify API key/permissions in Atlas.                |
| 403        | Forbidden            | Attempted action not allowed by access rules.          | Grant required permissions.                         |

---

### 🗂️ Duplicate & Index Errors

| Error Code | Name                  | Description                       | Common Fix                                |
|------------|-----------------------|-----------------------------------|-------------------------------------------|
| 11000      | DuplicateKey          | Duplicate value for unique index. | Use unique values or handle duplicates.   |
| 11001      | DuplicateKey (legacy) | Same as 11000 (deprecated).       | Same as above.                            |
| 12582      | IndexOptionsConflict  | Conflicting index options.        | Drop/recreate index with correct options. |

---

### 🌐 Network & Connectivity Errors

| Error Code | Name                    | Description                                        | Common Fix                                           |
|------------|-------------------------|----------------------------------------------------|------------------------------------------------------|
| 6          | HostUnreachable         | Target host unreachable.                           | Check server availability & firewall settings.       |
| 7          | HostNotFound            | Host/DNS cannot be resolved.                       | Verify hostname in connection string.                |
| 89         | NetworkTimeout          | Request timed out due to slow/unavailable server.  | Increase timeout or fix connectivity issues.         |
| 9002       | ExceededTimeLimit       | Request exceeded maximum allowed network time.     | Optimize queries, check latency.                     |
| 10107      | NotMaster               | Node is not primary, write attempted on secondary. | Direct writes to primary or enable `readPreference`. |
| 13436      | NotPrimaryNoSecondaryOk | No primary or secondary available.                 | Ensure replica set health, retry connection.         |

---

### ⚡ Write & Transaction Errors

| Error Code | Name                  | Description                                    | Common Fix                                |
|------------|-----------------------|------------------------------------------------|-------------------------------------------|
| 50         | ExceededTimeLimit     | Operation exceeded allowed time.               | Optimize query or increase timeout.       |
| 91         | ShutdownInProgress    | Operation interrupted (server shutdown).       | Retry after server restarts.              |
| 112        | WriteConflict         | Write conflict in transaction.                 | Retry operation.                          |
| 11600      | InterruptedAtShutdown | Operation stopped during shutdown.             | Retry after restart.                      |
| 11601      | Interrupted           | Operation manually interrupted.                | Retry operation.                          |
| 64         | WriteConcernFailed    | Write concern not satisfied.                   | Increase replication factor or adjust WC. |
| 10990      | TransactionAborted    | Transaction aborted due to conflict or error.  | Retry transaction.                        |
| 251        | NoSuchTransaction     | Transaction ID not found (expired or invalid). | Ensure valid transaction session.         |
| 263        | TooManyTransactions   | Too many open transactions.                    | Limit concurrent transactions.            |

---

### 🗄️ Query & Cursor Errors

| Error Code | Name                             | Description                                      | Common Fix                                  |
|------------|----------------------------------|--------------------------------------------------|---------------------------------------------|
| 59         | CommandNotFound                  | Command not recognized.                          | Use valid MongoDB command.                  |
| 120        | IllegalOperation                 | Operation not valid in this context.             | Ensure operator/command is used correctly.  |
| 133        | CursorNotFound                   | Cursor no longer exists.                         | Rerun query or keep cursor alive.           |
| 13127      | IndexNotFound                    | Attempt to use non-existent index.               | Ensure index exists or create required one. |
| 17287      | CannotImplicitlyCreateCollection | Operation tried to create collection implicitly. | Explicitly create collection first.         |
| 17399      | BSONObjectTooLarge               | BSON document exceeds maximum size (16MB).       | Break document into smaller chunks.         |

---

### 🔒 TLS/SSL & Security Errors

| Error Code | Name              | Description                              | Common Fix                                     |
|------------|-------------------|------------------------------------------|------------------------------------------------|
| 8000       | AtlasError        | Generic MongoDB Atlas error.             | Check Atlas logs for detailed cause.           |
| 9001       | SocketException   | Network socket failure.                  | Check network, TLS config, and cluster health. |
| 11002      | StaleShardVersion | Outdated shard metadata used in request. | Refresh shard routing info / retry operation.  |

---

### 🛠️ Miscellaneous Errors

| Error Code | Name               | Description                                         | Common Fix                            |
|------------|--------------------|-----------------------------------------------------|---------------------------------------|
| 26         | NamespaceNotFound  | Collection/DB does not exist.                       | Create DB/collection before querying. |
| 43         | CursorInUse        | Cursor already in use.                              | Use new cursor or close previous one. |
| 60         | DatabaseDifferCase | DB names differ only by letter case.                | Use consistent casing in DB names.    |
| 174        | OutOfDiskSpace     | Server ran out of disk space.                       | Free space or resize storage.         |
| 140        | MapReduceError     | Error while running MapReduce job.                  | Debug MapReduce functions.            |
| 17280      | CappedPositionLost | Attempted to query capped collection past position. | Adjust query logic.                   |
| 8002       | AtlasClusterPaused | Cluster is paused (Atlas free tier auto-pause).     | Resume cluster in Atlas dashboard.    |

---

### 🔒 Sharding & Replica Errors

| Error Code | Name                 | Description                            | Common Fix                                 |
|------------|----------------------|----------------------------------------|--------------------------------------------|
| 148        | StaleConfig          | Cluster config is outdated.            | Refresh cluster metadata.                  |
| 13388      | SendStaleConfig      | Shard config mismatch during request.  | Retry operation, ensure cluster stability. |
| 13435      | NotMasterOrSecondary | Node is neither primary nor secondary. | Retry on valid node.                       |

---

### 🧩 Error Types Summary

| Category                           | Typical Causes                                                       | Example Error Codes              |
|------------------------------------|----------------------------------------------------------------------|----------------------------------|
| **Authentication & Authorization** | Invalid login, insufficient privileges, Atlas access issues          | 2, 13, 18, 403, 8000, 8001       |
| **Duplicate & Index**              | Duplicate key insert, conflicting or missing indexes                 | 11000, 11001, 12582, 13127       |
| **Network & Connectivity**         | Host unreachable, DNS issues, timeouts, replica set errors           | 6, 7, 89, 9002, 10107, 13436     |
| **Write & Transaction**            | Write concern not met, transaction aborts, conflicts                 | 50, 64, 91, 112, 10990, 251, 263 |
| **Query & Cursor**                 | Invalid commands, lost cursors, BSON/document issues                 | 59, 120, 133, 17287, 17399       |
| **Sharding & Replica Set**         | Stale configs, invalid primary/secondary nodes                       | 148, 13388, 13435, 11002         |
| **TLS/SSL & Security**             | Socket/TLS handshake errors, invalid certificates                    | 9001, 8000, 8002                 |
| **Miscellaneous**                  | Missing namespace, disk issues, capped collections, MapReduce errors | 26, 43, 60, 140, 174, 17280      |

- **Authentication** now includes extended Atlas-specific codes (`8000`, `8001`, `403`).
- **Network** extended with replica set errors like `10107 (NotMaster)`.
- **Transactions** expanded with codes like `251 (NoSuchTransaction)` and `263 (TooManyTransactions)`.
- **Query** extended with large BSON errors (`17399`).
- **Sharding** errors clarified with stale config and replica role mismatches.
- **Miscellaneous** now includes capped collection and cluster pause errors.

---

## FAQ

**Q1:** _Can I use MongoDB Atlas free tier with API Maker?_  
Yes, the free tier works perfectly with API Maker.

**Q2:** _What’s the difference between mongodb:// and mongodb+srv?_  
`mongodb://` is a standard format, while `mongodb+srv://` uses DNS SRV records for simplified configuration.

**Q3:** _Does API Maker support replica sets?_  
Yes, simply include the replica set name in the connection string options.

---

## Related Links

- [Official MongoDB Connection String Docs](https://www.mongodb.com/docs/manual/reference/connection-string/)

- [API Maker Schemas Overview](https://docs.apimaker.dev/v1/docs/schema/schema.html)

---

## List of all MongoDB cloud service providers

### MongoDB Atlas (by MongoDB Inc.)

- Official managed service by MongoDB.
- Runs on **AWS, Azure, and Google Cloud**.
- Features: auto-scaling, backup/restore, global clusters, built-in security, charts & BI connector.
- [https://www.mongodb.com/atlas](https://www.mongodb.com/atlas)

---

### **API Maker Cloud**

- Provides one click mongodb installation with latest versions.
- Runs on dedicated VPS of your choice, so you can select based on your budget.
- You can install MongoDB with API Maker's server also which saves a lot of money.
- It is great choice for self hosted MongoDB, you can scale up or down mongodb server anytime you want, to handle more load and more users.
- [https://cloud.apimaker.dev](https://cloud.apimaker.dev)

---

### Amazon DocumentDB (with MongoDB compatibility)

- Managed service by **AWS**.
- Compatible with MongoDB APIs (not 100% feature identical).
- Fully integrated with AWS ecosystem (IAM, VPC, CloudWatch).
- [https://aws.amazon.com/documentdb/](https://aws.amazon.com/documentdb/)

---

### Azure Cosmos DB (MongoDB API)

- Microsoft’s globally distributed multi-model database.
- Offers **MongoDB-compatible API**.
- Features: multi-region writes, high availability, serverless options.
- [https://azure.microsoft.com/services/cosmos-db/mongodb/](https://azure.microsoft.com/services/cosmos-db/mongodb/)

---

### Google Cloud (via MongoDB Atlas partnership)

- Google Cloud does not provide a native MongoDB API service.
- Instead, **MongoDB Atlas is available directly through GCP Marketplace**.
- [https://cloud.mongodb.com](https://cloud.mongodb.com)

---

### ScaleGrid

- Fully managed database hosting (**MongoDB, Redis, MySQL, PostgreSQL**).
- Supports hosting on **AWS, Azure, GCP, DigitalOcean**.
- Features: custom backups, dedicated servers, SSH access.
- [https://scalegrid.io/mongodb/](https://scalegrid.io/mongodb/)

---

### ObjectRocket (by Rackspace)

- Managed MongoDB hosting.
- Features: automation, scaling, high availability.
- Targets enterprise-grade workloads.
- [https://www.objectrocket.com/mongodb](https://www.objectrocket.com/mongodb)

---

### Aiven

- Open-source database as a service provider.
- Offers fully managed MongoDB alongside **PostgreSQL, Kafka, Redis**, etc.
- Runs on **AWS, Azure, GCP, DigitalOcean, UpCloud**.
- [https://aiven.io/mongodb](https://aiven.io/mongodb)

---

### IBM Cloud Databases for MongoDB

- Fully managed MongoDB service on **IBM Cloud**.
- Features: automated backups, scaling, high availability.
- Integrated with other IBM Cloud services.
- [https://www.ibm.com/cloud/databases-for-mongodb](https://www.ibm.com/cloud/databases-for-mongodb)

---

### DigitalOcean Managed MongoDB

- Simple, developer-friendly managed MongoDB clusters.
- Built-in metrics, automated backups, scaling.
- Popular with startups and indie developers.
- [https://www.digitalocean.com/mongodb](https://www.digitalocean.com/mongodb)

---

### Kamatera

- Cloud platform offering managed MongoDB hosting.
- Pay-as-you-go pricing, custom server configurations.
- Flexible deployments on global data centers.
- [https://www.kamatera.com/solutions/mongodb-hosting/](https://www.kamatera.com/solutions/mongodb-hosting/)

---

### Severalnines (ClusterControl)

- Provides automation and management for **MongoDB clusters**.
- Self-hosted + managed options.
- Features: backup, scaling, monitoring, cluster management.
- [https://severalnines.com/mongodb](https://severalnines.com/mongodb)

---

### Compose (Legacy - Now Part of IBM Cloud)

- Originally independent MongoDB hosting provider.
- Acquired by IBM, now integrated with **IBM Cloud Databases**.
- Still used by some legacy users.
- [https://www.compose.com/](https://www.compose.com/)

---

### Bitnami (MongoDB Helm Charts / Containers)

- Not a hosted service but widely used for **self-managed MongoDB deployments**.
- Offers Helm charts and container images for Kubernetes and cloud providers.
- Good for developers who want full control over hosting.
- [https://bitnami.com/stack/mongodb](https://bitnami.com/stack/mongodb)

---

### ScaleXtremeDB (via VMWare Tanzu / PaaS integrations)

- Provides MongoDB deployments via Kubernetes & Tanzu integrations.
- Targets enterprises using hybrid-cloud setups.
- [https://tanzu.vmware.com](https://tanzu.vmware.com)

---

### CloudClusters (MongoDB-as-a-Service)

- Offers **managed MongoDB hosting** on dedicated instances.
- Affordable developer-friendly pricing.
- Features: automated backups, scaling, SSL, monitoring.
- [https://www.cloudclusters.io/mongodb](https://www.cloudclusters.io/mongodb)

---

### Instaclustr (by NetApp)

- Managed data platform provider.
- Supports MongoDB along with Cassandra, PostgreSQL, Kafka, Redis.
- Strong focus on **SLA-backed enterprise deployments**.
- [https://www.instaclustr.com/mongodb/](https://www.instaclustr.com/mongodb/)

---

### ObjectBox (Edge/IoT MongoDB Alternative)

- Not strictly MongoDB, but offers a **MongoDB-compatible API** for edge/IoT.
- Targets embedded/edge use cases.
- [https://objectbox.io/mongodb-alternative/](https://objectbox.io/mongodb-alternative/)

---

### Crunchy Bridge (Postgres-first but with MongoDB compatibility layers)

- Focused on PostgreSQL primarily, but offers tools/plugins for **MongoDB interoperability**.
- Sometimes chosen for migration paths.
- [https://www.crunchydata.com/](https://www.crunchydata.com/)

---

### Private Cloud / Kubernetes-based MongoDB Operators

- Not exactly SaaS, but widely adopted for MongoDB “cloud-like” experience:
    - **Percona Server for MongoDB (PSMDB)** → [https://www.percona.com/software/mongodb](https://www.percona.com/software/mongodb)
    - **Crunchy Data Kubernetes Operator**
    - **MongoDB Kubernetes Operator (by MongoDB)**
- Ideal for enterprises who want **self-managed MongoDB cloud** in their private infra.

---

### OVHcloud – Databases for MongoDB

- [https://us.ovhcloud.com/public-cloud/mongodb/](https://us.ovhcloud.com/public-cloud/mongodb/)
- A true turn-key managed MongoDB DBaaS in OVH’s Public Cloud. Automates setup, maintenance, backups, elasticity, and security. Includes a free “Discovery” tier and paid production plans.

---

### Yandex Cloud – Managed Service for MongoDB

- [https://cloud.yandex.com/services/mongodb](https://cloud.yandex.com/services/mongodb)
- A fully managed MongoDB service within Yandex Cloud, ideal for users in CIS regions seeking low-latency or localized deployments. *(Note: Yandex Cloud support info inferred; page referenced in our ecosystem but no detailed site snippet)*

---

### Clever Cloud – Managed MongoDB Add-on

- [https://www.clever-cloud.com/](https://www.clever-cloud.com/)
- Offers a MongoDB-managed add-on with a free 500 MB plan—good for developers wanting seamless hosting with no overhead.

---

### Instaclustr

- [https://www.instaclustr.com/mongodb/](https://www.instaclustr.com/mongodb/)
- Enterprise-ready, SLA-backed platform offering managed MongoDB (plus Cassandra, Kafka, etc.) with robust support and performance guarantees.

---

### CloudClusters (MongoDB-as-a-Service)

- [https://www.cloudclusters.io/mongodb](https://www.cloudclusters.io/mongodb)
- Developer-friendly managed MongoDB on dedicated servers—features include automated backups, SSL, scaling, and straightforward pricing.

---

### Rackspace Cloud (via MongoLab Legacy)

- [Website](http://www.rackspace.com)
- Historically provided MongoDB through the MongoLab add-on in Rackspace’s cloud offerings. Now largely defunct since mLab’s acquisition by MongoDB.

---

### mLab (now legacy / absorbed)

- [https://mlab.com/](https://mlab.com/)
- Was a popular MongoDB-as-a-Service provider (formerly MongoLab), hosted on AWS, GCP, Azure, and PaaS like Heroku. Acquired by MongoDB Inc.; now users are migrated to Atlas.

---

### Linode Managed MongoDB Service

- **Yes** — Linode offers a **managed MongoDB service** as part of its Managed Databases portfolio.
- **Details**:
    - This is powered by **Akamai’s Linode Managed Database** offering and includes support for **MongoDB**, along with MySQL, PostgreSQL, and Redis.
    - It's a true **DBaaS (Database-as-a-Service)** — developers can provision MongoDB clusters directly from the Linode control panel.
- **Website**: https://www.linode.com/products/databases/

---

### A2 Hosting

- [https://www.a2hosting.com/](https://www.a2hosting.com/)
- Offers fully-managed MongoDB instances via their shared or VPS hosting. Geared toward users looking for low-cost, reliable MongoDB hosting with 24/7 support.

---

### Verpex Hosting

- [https://www.verpex.com/](https://www.verpex.com/)
- Cloud hosting solutions suitable for MongoDB deployments. While not a native DBaaS, it delivers quick setup and reliable performance for MongoDB instances.

---

### CoreWeave

- [https://www.coreweave.com/](https://www.coreweave.com/)
- Originally focused on GPU and HPC workloads, CoreWeave provides flexible infrastructure where MongoDB can be deployed manually. Great for AI/ML teams needing both compute and database hosting.

---

### Paperspace

- [https://www.paperspace.com/](https://www.paperspace.com/)
- Known for AI-focused cloud services, Paperspace lets developers spin up MongoDB manually on its VMs. Best suited for developers combining MongoDB with ML workflows.

---

### RunPod

- [https://www.runpod.io/](https://www.runpod.io/)
- AI-oriented cloud provider that also allows manual deployments of MongoDB. Popular among ML/AI startups needing fast infra with flexible pricing.

---

### Jelastic (by Virtuozzo)

- [https://www.virtuozzo.com/](https://www.virtuozzo.com/)
- A multi-cloud PaaS that supports running MongoDB as a containerized or Kubernetes service. Good for developers who want scalability without full DBA overhead.

---

### A2 Hosting

- [https://www.a2hosting.com/](https://www.a2hosting.com/)
- Offers MongoDB hosting on VPS and dedicated servers. Known for speed optimization and developer-friendly setup with 24/7 support.

---

### Verpex Hosting

- [https://verpex.com/](https://verpex.com/)
- Provides cloud hosting with support for MongoDB. Simple deployment, SSD storage, and global reach for small to medium projects.

---

### FastHosts

- [https://www.fasthosts.co.uk/](https://www.fasthosts.co.uk/)
- UK-based hosting provider. While not offering managed MongoDB, its VPS and cloud solutions are commonly used to deploy MongoDB manually.

---

### DreamHost (VPS)

- [https://www.dreamhost.com/](https://www.dreamhost.com/)
- Popular US-based hosting provider that supports MongoDB on VPS and dedicated servers. Developer-focused with open-source friendly policies.

---

### GreenGeeks

- [https://www.greengeeks.com/](https://www.greengeeks.com/)
- Eco-friendly hosting provider. Supports MongoDB deployment on VPS servers. Marketed toward small businesses and startups.

---

### Namecheap (VPS Hosting)

- [https://www.namecheap.com/](https://www.namecheap.com/)
- Known mostly for domains, but also offers VPS hosting where MongoDB can be installed. Affordable entry point for small MongoDB workloads.

---

### DigitalOcean (Managed Databases for MongoDB)

- [https://www.digitalocean.com/products/managed-databases-mongodb](https://www.digitalocean.com/products/managed-databases-mongodb)
- Fully managed MongoDB clusters with automatic failover, scaling, daily backups, and monitoring. A good choice for startups and developers seeking simplicity.

---

### FastComet

- [https://www.fastcomet.com/](https://www.fastcomet.com/)
- Provides MongoDB hosting on its VPS and cloud hosting plans. Known for excellent customer support, SSD storage, and developer-friendly environments.

---

### Bluehost

- [https://www.bluehost.com/](https://www.bluehost.com/)
- Popular hosting provider that supports MongoDB on VPS and dedicated hosting. Ideal for small businesses or developers wanting MongoDB alongside websites/apps.

---

### Ultahost

- [https://ultahost.com/](https://ultahost.com/)
- Offers secure and high-performance VPS hosting optimized for MongoDB. Includes free SSL, backups, and 24/7 support.

---

### InterServer

- [https://www.interserver.net/](https://www.interserver.net/)
- Budget-friendly VPS hosting provider with support for MongoDB. Pay-as-you-go pricing model and customizable configurations.

---

### IONOS by 1&1

- [https://www.ionos.com/](https://www.ionos.com/)
- Affordable VPS hosting service supporting MongoDB deployments. Popular in Europe for cost-effective and reliable infrastructure.

---

### Vultr

- [https://www.vultr.com/](https://www.vultr.com/)
- Cloud infrastructure provider with powerful VPS solutions. Developers often use Vultr for manually hosting MongoDB with global data center options.

---

### Hetzner

- [https://www.hetzner.com/](https://www.hetzner.com/)
- German hosting and cloud provider. Offers affordable cloud servers widely used in Europe for hosting MongoDB clusters manually.

---

### Scaleway

- [https://www.scaleway.com/](https://www.scaleway.com/)
- European cloud provider offering flexible cloud instances. While not a managed MongoDB service, it’s widely used for deploying MongoDB manually.

---

### UpCloud

- [https://www.upcloud.com/](https://www.upcloud.com/)
- High-performance cloud servers with 100% uptime SLA. Developers deploy MongoDB manually on its ultra-fast VPS.

---