# PKI

## Get certificate chain

> This method returns the certificate chain.

```json
{"openapi":"3.0.2","info":{"title":"Vault API","version":"1.36.3"},"tags":[],"security":[{"Ledger_API_Key":[],"Ledger_API_User":[]},{"Ledger_API_Key":[],"Ledger_API_User":[],"Ledger_Store_Auth_Token":[]},{"Ledger_API_User":[]},{"Ledger_API_User":[],"Ledger_Store_Auth_Token":[]}],"components":{"securitySchemes":{"Ledger_API_Key":{"description":"If you've set up your API Key when initializing your LAM, you'll need to include it as a header along with the api user header. For more details, [see step 5 of the get started documentation](https://help.vault.ledger.com/Content/api/api_getstarted.html).","in":"header","name":"X-Ledger-API-Key","type":"apiKey"},"Ledger_API_User":{"description":"(**required**) Username of a registered API User","in":"header","name":"X-Ledger-API-User","type":"apiKey"}}},"paths":{"/certificates/chain":{"get":{"summary":"Get certificate chain","tags":["PKI"],"description":"This method returns the certificate chain.","responses":{"200":{"content":{"application/json":{"schema":{"items":{"format":"hex","type":"string"},"type":"array"}}},"description":"List of certificates in hexadecimal format (DER encoded)"}}}}}}
```


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