---
title: "POST /#Action=CreateDBInstance"
method: POST
path: "/#Action=CreateDBInstance"
---

# POST /#Action=CreateDBInstance

`POST /#Action=CreateDBInstance`

Creates a new DB instance.

The new DB instance can be an RDS DB instance, or it can be a DB instance in an Aurora DB cluster. For an Aurora DB cluster, you can call this operation multiple times to add more than one DB instance to the cluster.

For more information about creating an RDS DB instance, see [Creating an Amazon RDS DB instance](https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_CreateDBInstance.html) in the _Amazon RDS User Guide_.

For more information about creating a DB instance in an Aurora DB cluster, see [Creating an Amazon Aurora DB cluster](https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/Aurora.CreateInstance.html) in the _Amazon Aurora User Guide_.

## Query parameters

- `Action` 'CreateDBInstance', required
- `Version` '2014-10-31', required

## Response `200`

Success

## Other responses

- `480` — DBInstanceAlreadyExistsFault
- `481` — InsufficientDBInstanceCapacityFault
- `482` — DBParameterGroupNotFoundFault
- `483` — DBSecurityGroupNotFoundFault
- `484` — InstanceQuotaExceededFault
- `485` — StorageQuotaExceededFault
- `486` — DBSubnetGroupNotFoundFault
- `487` — DBSubnetGroupDoesNotCoverEnoughAZs
- `488` — InvalidDBClusterStateFault
- `489` — InvalidSubnet
- `490` — InvalidVPCNetworkStateFault
- `491` — ProvisionedIopsNotAvailableInAZFault
- `492` — OptionGroupNotFoundFault
- `493` — DBClusterNotFoundFault
- `494` — StorageTypeNotSupportedFault
- `495` — AuthorizationNotFoundFault
- `496` — KMSKeyNotAccessibleFault
- `497` — DomainNotFoundFault
- `498` — BackupPolicyNotFoundFault
- `499` — NetworkTypeNotSupported
- `500` — CertificateNotFoundFault

---

[API](https://skmtc.net/aws/apis/rds.md) · [All operations](https://skmtc.net/aws/apis/rds/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/aws/rds/versions/e6b3ad7df19b/schema)