---
title: Reference
description: Find reference topics for the PingOne Platform API, including error codes, query parameters, paging, password encoding, TLS requirements, and role permissions
component: pingone-api
page_id: pingone-api:platform:reference/index
canonical_url: https://developer.pingidentity.com/pingone-api/platform/reference/index.html
llms_txt: https://developer.pingidentity.com/pingone-api/llms.txt
docs_for_agents: https://developer.pingidentity.com/build-with-ai/docs-for-agents.md
revdate: 2026-08-06
---

# Reference

This section provides reference information for the PingOne Platform API. Topics include:

* [Error codes](error-codes.html)

  Provides a list of common PingOne top-level and detail API error messages. The error response includes a high-level error code and optional details containing specific information on how to resolve the issue.

* [Query parameter quick reference](query-parameter-quick-reference.html)

  Provides a quick reference to show the SCIM operators that apply to a given PingOne endpoint operation. It also provides information about endpoint operations that support the `limit`, `order`, and `expand` filters.

* [Paging and ordering collections](paging-ordering-collections.html)

  Provides general information about paging, ordering, and filtering large collections.

* [Password encoding](password-encoding.html)

  Provides the list of Key Derivation Functions (KDF) and crytographic ciphers as methods for password encoding that PingOne supports.

* [TLS and cipher suite requirements](handshakes.html)

  Provides information about TLS and cipher suite requirements for the `auth.pingone.com` and `api.pingone.com` domains.

* [External transaction and session IDs](external-transaction-and-session-ids.html)

  Provides information about custom HTTP headers across all endpoints that help track transactions in PingOne. These are optional headers to correlate with your own transactions and sessions.

* [PingOne Localization](localization/index.html)

  Provides information about localization in PingOne, including how PingOne services use the end user's browser settings as a factor to determine which language to present to users.

* [Load Testing](load-testing.html)

  Provides guidelines that will help you conduct load testing in a way that will yield accurate results based on your service level agreement (SLA) and the inherent limits of the PingOne platform.

* [PingOne Platform Limits](https://docs.pingidentity.com/pingone/getting_started_with_pingone/p1_platform_limits.html)

  A link to the topic in the *PingOne Admin Guide* that describes the PingOne platform limits.

* [Roles and Permissions in PingOne](roles-and-permissions-in-pingone/index.html)

  Provides a list (and descriptions) of the PingOne built-in roles, and a list of PingOne role permissions that can be used to define custom roles.

* [Audit Reporting Events](audit-reporting-events.html)

  Provides a list of all PingOne audit reporting events by event type and event name.

The following reference topics are available in *Foundations*:

* [Conventions](../../foundations/conventions/index.html)

  Includes detailed information about PingOne API requests and responses.

* [Platform security](../../foundations/api-security/index.html)

  Lists the measures taken to ensure the continued resiliency and security of the PingOne platform, as well as measures you can take in this regard for your deployment and applications.