---
title: x5c
framework: retentionmessaging
role: symbol
role_heading: Type
path: retentionmessaging/x5c
---

# x5c

A JSON Web Signature (JWS) header parameter that contains the certificate chain that corresponds to the key you use to digitally sign the JWS.

## Declaration

```data
[string] x5c
```

## See Also

### Real-time request header

- [JWSDecodedHeader](retentionmessaging/jwsdecodedheader.md)
- [alg](retentionmessaging/alg.md)