# List keys

URL: https://docs.hanzo.ai/docs/openapi/principal/get-principal-keys

> Publishes the keys attestations are signed with, as a JSON Web Key Set (RFC 7517; Ed25519 keys as RFC 8037 writes them).

`GET /v1/principal/keys`

> [Principal →](https://docs.hanzo.ai/docs/openapi/principal) · [All API references →](https://docs.hanzo.ai/docs/openapi) · [Get started →](https://docs.hanzo.ai/docs/guides)

|               |                                          |
| ------------- | ---------------------------------------- |
| **Address**   | `https://api.hanzo.ai/v1/principal/keys` |
| **Method**    | `GET`                                    |
| **Operation** | `get_principal_keys`                     |
| **Auth**      | `Authorization: Bearer $HANZO_API_KEY`   |

Publishes the keys attestations are signed with, as a JSON Web Key Set (RFC
7517; Ed25519 keys as RFC 8037 writes them). Open to anyone: a verifier
verifying an agent's statement fetches this once and verifies offline.

A key a rotation retired stays here and signs nothing, so a statement signed
before the rotation verifies until it expires.

## Request

`GET /v1/principal/keys` takes no parameters and no body — the credential is the whole request.

## Response

| Status    | Body            | Meaning |
| --------- | --------------- | ------- |
| `200`     | principal.JWKS  | ok      |
| `default` | problem-details | refused |

`200` body — 7 fields.

| Field        | In   | Type             | Always | Description                                         |
| ------------ | ---- | ---------------- | ------ | --------------------------------------------------- |
| `keys`       | body | principal.JWK\[] | —      |                                                     |
| `keys[].alg` | body | string           | —      | Alg is EdDSA.                                       |
| `keys[].crv` | body | string           | —      | Crv is Ed25519.                                     |
| `keys[].kid` | body | string           | —      | Kid names the key; a statement's header carries it. |
| `keys[].kty` | body | string           | —      | Kty is OKP, an octet key pair.                      |
| `keys[].use` | body | string           | —      | Use is sig.                                         |
| `keys[].x`   | body | string           | —      | X is the public key, base64url without padding.     |

Failure carries the platform error shape — see [Errors](https://docs.hanzo.ai/docs/errors).

## Examples

**CLI**

`hanzo` has no subcommand for this operation — the CLI serves only what cloud's live route table confirms. Use HTTP or an SDK.

**SDK**

**.ts**

```ts
import { Configuration, PrincipalApi } from 'hanzoai';

const api = new PrincipalApi(new Configuration({ accessToken: process.env.HANZO_API_KEY }));
const { data } = await api.getPrincipalKeys();
```

**.py**

```python
from hanzoai.cloud import ApiClient, Configuration
from hanzoai.cloud.api import PrincipalApi

client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"]))
result = PrincipalApi(client).get_principal_keys()
```

**.go**

```go
cfg := hanzoai.NewConfiguration()
cfg.AddDefaultHeader("Authorization", "Bearer "+os.Getenv("HANZO_API_KEY"))
client := hanzoai.NewAPIClient(cfg)

resp, _, err := client.PrincipalAPI.GetPrincipalKeys(context.Background()).Execute()
if err != nil {
	return err
}
```

**.rs**

```rust
use hanzo_client::apis::{configuration::Configuration, principal_api};

let mut cfg = Configuration::new();
cfg.bearer_access_token = std::env::var("HANZO_API_KEY").ok();

let result = principal_api::get_principal_keys(&cfg, Default::default()).await?;
```

**.java**

```java
import ai.hanzo.cloud.ApiClient;
import ai.hanzo.cloud.api.PrincipalApi;

ApiClient client = new ApiClient();
client.setBearerToken(System.getenv("HANZO_API_KEY"));

var result = new PrincipalApi(client).getPrincipalKeys();
```

**HTTP**

```bash
curl https://api.hanzo.ai/v1/principal/keys \
  -H "Authorization: Bearer $HANZO_API_KEY"
```

**MCP**

MCP reaches **principal** through the `principal` tool, which names its 7 operations with its own verbs — this one among them, under a name only MCP declares. `describe` explains any of them:

```bash
curl -X POST https://api.hanzo.ai/v1/mcp \
  -H "Content-Type: application/json" \
  -d '{
       "jsonrpc": "2.0",
       "id": 1,
       "method": "tools/call",
       "params": {
         "name": "describe",
         "arguments": {
           "op": "list_principals"
         }
       }
     }'
```

---

[Principal API](https://docs.hanzo.ai/docs/openapi/principal) · [All Hanzo APIs](https://docs.hanzo.ai/docs/openapi) · [Interactive reference](https://docs.hanzo.ai/docs/openapi/reference)