---
updatedAt: 2026-03-01T18:57:26.000Z
agentTools:
  siteIndex: https://techdocs.akamai.com/llms.txt
  projectIndex: https://techdocs.akamai.com/cps/llms.txt
---

# Third-party

This table shows the different *allowedInput.types* and corresponding headers you use to [Get a change](https://techdocs.akamai.com/cps/reference/get-change-allowed-input-param) and [Update a change](https://techdocs.akamai.com/cps/reference/post-change-allowed-input-param).

| allowedInput\[].​type              | API type                                             | Description                                                                                       | Content-Type header                                                   | Accept header                                       |
| :--------------------------------- | :--------------------------------------------------- | :------------------------------------------------------------------------------------------------ | :-------------------------------------------------------------------- | :-------------------------------------------------- |
| `third-party-csr`                  | [info](https://techdocs.akamai.com/cps/reference/get-change-allowed-input-param) / GET     | Get [Certificate Signing Request](https://techdocs.akamai.com/cps/docs/dl-copy-csrs-3p-certs) (CSR) for a third-party certificate. | N/A                                                                   | `application/​vnd.​akamai.​cps.​csr.​v1+json`       |
| `third-party-cert-and-trust-chain` | [update](https://techdocs.akamai.com/cps/reference/post-change-allowed-input-param) / POST | Upload third-party certificate and trust chain.                                                   | `application/​vnd.​akamai.​cps.​certificate-and-trust-chain.​v2+json` | `application/​vnd.​akamai.​cps.​change-id.​v1+json` |

# Sibling pages

* [Change management](https://techdocs.akamai.com/cps/reference/change-mgmt.md)
* [Pre and Post-verification warnings](https://techdocs.akamai.com/cps/reference/pre-post-verification-warnings.md)
* [Let's Encrypt challenges](https://techdocs.akamai.com/cps/reference/lets-encrypt-challenges.md)