# Create Account Public Key

**POST /wallets/{walletId}/keys/{index}**

<p align="right">status: <strong>stable</strong></p>
Derive an account public key for any account index. For this key derivation to be possible,
the wallet must have been created from mnemonic.

It is possible to use the optional `purpose` field to override that branch of the derivation path
with different hardened derivation index. If that field is omitted, the default purpose
for Cardano wallets (`1852H`) will be used.

<b>Note:</b> Only _Hardened_ indexes are supported by this endpoint.



## Servers
- https://localhost:8090/v2: https://localhost:8090/v2 ()



## Parameters

#### Path parameters
- **walletId** (string(hex))
  
- **index** (string)
  An individual segment within a derivation path.

The `H` suffix indicates a _Hardened_ child private key, which
means that children of this key cannot be derived from the public
key. Indices without a `H` suffix are called _Soft_.



## Body parameters
Content-type: application/json

- **passphrase** (string)
  A master passphrase to lock and protect the wallet for sensitive operation (e.g. sending funds)
- **format** (string)
  Determines whether extended (with chain code) or normal (without chain code) key is requested
- **purpose** (string)
  An individual segment within a derivation path.

The `H` suffix indicates a _Hardened_ child private key, which
means that children of this key cannot be derived from the public
key. Indices without a `H` suffix are called _Soft_.


## Responses
### 415: Unsupported Media Type

#### Body Parameters: application/json (object)
- **message** (string)
  A descriptive error message.
- **code** (string)
  A specific error code for this error, more precise than HTTP ones.

### 406: Not Acceptable

#### Body Parameters: application/json (object)
- **message** (string)
  May occur when providing an invalid 'Accept' header.
- **code** (string)
  

### 400: Bad Request

#### Body Parameters: application/json (object)
- **message** (string)
  May occur when a request is not well-formed; that is, it fails to parse
successfully. This could be the case when some required parameters
are missing or, when malformed values are provided.

- **code** (string)
  

### 202: Accepted

#### Body Parameters: application/json (string(bech32))
string(bech32)

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