AI Provider for Osaurus

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After activation, any plugin that calls wp_ai_client_prompt() (Gutenberg AI features, official provider plugins, third-party code) can route prompts to Osaurus running on the same machine. Prompts never leave the local network.

Why use it

• Privacy first — prompts stay on your machine, no third-party API receives the data.

• Zero cost — no API keys, no metered requests.

• Fast — MLX-backed inference on Apple Silicon.

• OpenAI-compatible wire format — streaming, tool calls, JSON output, and chat history work out of the box.

Capabilities

• Text generation

• Chat history

• Function / tool calls

• Structured JSON output

• Streaming

Image generation, embeddings, and text-to-speech are not supported because Osaurus does not currently expose those endpoints. Pair this plugin with an image-capable provider such as the official AI Provider for OpenAI when you need images.

How it works

The plugin registers a provider with AiClient::defaultRegistry() and points it at the Osaurus HTTP server. Because Osaurus speaks the OpenAI Chat Completions wire format, the implementation extends the SDK’s OpenAI-compatible base classes — so capabilities like streaming and tool calling flow through automatically.

Configuration

The plugin resolves the Osaurus base URL in this order (first match wins):

• OSAURUS_BASE_URL PHP constant defined in wp-config.php.

• osaurus_ai_connector_base_url option, settable from Settings → Connectors in wp-admin.

• Default: http://127.0.0.1:1337/v1 (works out of the box for bare-metal WordPress on the same Mac as Osaurus; Docker setups must override).

Pick the right URL for your setup

WordPress can run in many places — the right base URL depends on how it reaches your Mac, where Osaurus is listening.

• Bare-metal WordPress on the same Mac (MAMP, Laravel Valet, Local, WordPress Studio, native PHP):

1:1337/v1 (this is the default — no configuration needed)

• Docker-based WordPress on the same Mac (DDEV, Lando, Docker Desktop):

internal:1337/v1

• WordPress on a different machine on your LAN, Osaurus on your Mac:

http://:1337/v1 — make sure Osaurus is bound to a non-loopback interface and your firewall allows port 1337.

• Remote Osaurus you operate (e.g. a Mac mini on Tailscale, a colocated server):

http://:1337/v1 or https://... if you front it with TLS.

The fastest way to confirm a URL works from the WordPress host: run curl <base-url>/models from the same shell environment WordPress runs in. A JSON list back means the connector will work.

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External services

This plugin connects to an Osaurus HTTP server — a local LLM runtime that you install and run yourself on the same machine as WordPress (or on a host you operate). The plugin is useless without it: every text-generation request from the WordPress AI Client is routed to this server.

Service: Osaurus (self-hosted, local LLM runtime)

Osaurus is an open-source Apple Silicon LLM runtime that exposes an OpenAI-compatible HTTP API. It is installed and operated by the same person running WordPress — there is no third-party service operator. This plugin forwards prompts to it so WordPress can perform text generation, chat, tool calls, and structured JSON output without sending data to any cloud provider.

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Hosts the plugin actually contacts at runtime

The plugin sends HTTP requests only to the host and port resolved (in order) from:

• The OSAURUS_BASE_URL PHP constant (if defined in wp-config.php ).

• The osaurus_ai_connector_base_url WordPress option (set from Settings &rarr; Connectors ).

• The built-in default http://127.0.0.1:1337/v1.

Two host targets are referenced by name in the plugin code as quick-pick presets and as the default:

• 127.0.0.1:1337 — loopback on the same machine as WordPress (default). Used by bare-metal installs (Studio, MAMP, Valet, Local, native PHP).

• host.docker.internal:1337 — Docker’s hostname for the host machine. Used by Docker-based WordPress (DDEV, Lando, Docker Desktop). Resolved by Docker, not by a public DNS server.

If the user configures a different URL, the plugin only contacts that URL. The plugin never contacts any third-party endpoint operated by the plugin author, the Osaurus project, or any other party.

What data is sent and when

• When any plugin (including WordPress core) calls wp_ai_client_prompt() and routes through Osaurus, the plugin sends a POST to {base_url}/chat/completions with: the prompt text, the conversation history you supplied, the model ID, sampling parameters (temperature, top_p, max tokens, etc.), and any tool / function declarations or JSON schemas you supplied.

• When an admin opens Settings &rarr; Connectors, the plugin sends a GET {base_url}/models to populate the model picker and a GET {base_root}/health to display a connection status indicator. Both run only for users with manage_options and are triggered by user actions in wp-admin.

• No telemetry, analytics, or background requests are sent.

Terms of service and privacy policy

Osaurus is open-source software you self-host. There is no third-party service operator collecting your data. See the project pages linked above for the project’s terms and source.

If you point the plugin at a remote Osaurus server operated by someone else (for example, a Mac mini you reach over Tailscale), the operator of that server is the data recipient and is governed by whatever terms you have with them.