> For the complete documentation index, see [llms.txt](https://docs.podigee.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.podigee.com/documentation/start-here/ai-agents/secure-and-govern-agent-access/understand-client-version-and-language-compatibility.md).

# Understand client, version, and language compatibility

Reference current MCP protocol eras, client boundaries, pdg release policy, and languages.

## MCP protocol

The Podigee server supports two explicit protocol eras:

| Version      | Compatibility role                                              |
| ------------ | --------------------------------------------------------------- |
| `2026-07-28` | Preferred stateless protocol with optional `server/discover`.   |
| `2025-11-25` | Legacy compatibility with initialization and session bootstrap. |

New compatible clients should prefer `2026-07-28`, refresh private catalogs as instructed by the server, and send the required protocol and routing metadata.

## Clients

* The pdg CLI is Podigee's owned client for local media transfer and command-line workflows.
* Another MCP client can connect when it supports Podigee's Streamable HTTP and OAuth contract.
* First-party ChatGPT and Claude directory connectors use the same MCP resource and OAuth model, but their customer availability remains release-gated until the directory listings are live.
* A hosted connector cannot upload an arbitrary local file through HTTPS `PUT`.

## pdg versions

Podigee has not announced a public minimum `pdg` version. Each approved release identifies its supported version. The server can publish update guidance or reject a version that is no longer supported.

Run `pdg version` and use the newest approved signed release. A rejected client receives `pdg_cli_update_required` with the applicable update guidance.

## Languages and platforms

The pdg CLI supports English, German, Spanish, French, and Polish through `--locale`. An approved release identifies its supported operating systems and processor architectures.

## Related tasks

* [Install the pdg CLI](/documentation/start-here/ai-agents/connect-and-authorize/install-the-pdg-cli.md)
* [Connect another compatible MCP client](/documentation/start-here/ai-agents/connect-and-authorize/connect-another-compatible-mcp-client.md)


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