OpenViking/examples/openwebui-plugin

OpenViking Tool Server for Open WebUI

A standalone FastAPI server that exposes a curated subset of OpenViking endpoints as OpenAPI tools so Open WebUI can call them as native tools.

中文说明在下方 / Chinese instructions below.

What This Plugin Does

Open WebUI supports two integration mechanisms — Python "Functions" pasted into its admin UI, and external OpenAPI tool servers auto-discovered from /openapi.json. This plugin implements the second mechanism.

It is a thin translation layer: every tool route forwards a request to the corresponding OpenViking HTTP endpoint, attaches tenant headers, and returns the response. There is no business logic here — see the OpenViking server for that.

Tools Exposed

Seven curated tools, all auto-discovered by Open WebUI:

Tool	OpenViking endpoint	Purpose
ov_search	POST /api/v1/search/find	Semantic search across memories, resources, skills
ov_recall_memories	POST /api/v1/search/find (scoped to viking://user/memories/)	Recall personal memories for the current query
ov_add_memory	POST /api/v1/content/write to viking://user/memories/<name>	Persist a new memory
ov_list_memories	GET /api/v1/fs/ls?uri=viking://user/memories/	Browse the memories directory
ov_read_resource	GET /api/v1/content/read	Read full text content of any viking:// URI
ov_add_resource	POST /api/v1/resources	Ingest a remote URL or path-reachable file
ov_session_status	GET /api/v1/sessions/{id}	Inspect counts and archive state of a session

The list is intentionally small. Adding more is straightforward — see the Roadmap.

Quickstart

cd examples/openwebui-plugin
pip install -e .
OV_API_KEY=your-key python -m openviking_openwebui

The server listens on 0.0.0.0:8765 by default. You should see:

INFO:     Uvicorn running on http://0.0.0.0:8765

Verify the OpenAPI spec is served:

curl http://localhost:8765/openapi.json | jq '.paths | keys'

Wiring Into Open WebUI

1. Open WebUI → Settings → Tools → Add Tool Server.
2. Paste the URL where this server is reachable, e.g. http://localhost:8765.
3. Open WebUI fetches /openapi.json, lists all seven tools, and presents them to the LLM as callable tools on every chat turn.

No copy-pasting Python files, no admin-panel uploads. The same tool server is reusable across any OpenAPI-aware client.

Configuration

All configuration is via environment variables:

Variable	Default	Description
OV_ENDPOINT	http://localhost:1933	OpenViking server base URL
OV_API_KEY	(empty)	Bearer token sent as Authorization: Bearer …
OV_ACCOUNT	default	Tenant — sent as X-OpenViking-Account
OV_USER	default	User — sent as X-OpenViking-User
OV_AGENT	default	Actor peer ID — sent as X-OpenViking-Actor-Peer
OV_BIND	0.0.0.0:8765	Host:port the tool server binds to
OV_TIMEOUT	30	HTTP timeout in seconds when calling OpenViking

There is no config file. This is intentional — make the deployment unit one binary and one set of env vars.

Tool Reference

ov_search

Top-level semantic search. Takes {query, limit?, target_uri?, score_threshold?} and returns {hits: [{uri, score, snippet?}], raw}. Use this when you want to search across memories, resources, and skills together.

ov_recall_memories

Same as ov_search but target_uri is forced to viking://user/memories/, so only personal memories are searched. Use this in chat to ask "what do you remember about me re: X?".

ov_add_memory

Persists a memory. Takes {name, content, mode?, wait?} and writes viking://user/memories/<name> via OpenViking's content write API. mode is one of replace | append | create.

ov_list_memories

Lists entries directly under viking://user/memories/. Takes {recursive?, limit?}.

ov_read_resource

Reads any viking:// URI's text content. Takes {uri, offset?, limit?}.

ov_add_resource

Triggers OpenViking ingestion of a remote URL or path the OV server can reach. Takes {path, to?, parent?, reason?, instruction?, wait?}. Pure HTTP forward — the OV server validates the source.

ov_session_status

Returns session metadata for a given session ID — message counts, archive state, pending tokens. Takes {session_id}.

Tests

cd examples/openwebui-plugin
pip install -e ".[test]"
pytest tests -x -q

The test suite uses respx to mock the OpenViking HTTP layer, and asserts each tool calls the correct upstream method/path/body and forwards tenant headers verbatim.

Limitations

• No streaming. Open WebUI tools are request/response. Live transcript streaming is out of scope for this plugin.
• No file uploads. ov_add_resource accepts a remote URL or a path the OV server can reach itself. To upload binary blobs, hit the OV server's temp_upload endpoint directly.
• No write-side memory deletion / move tools. Read-mostly by design; users who want destructive operations should use the OV CLI.
• Single tenant per process. Tenant identity comes from env vars, so run one tool server per (account, user) pair if you need to multiplex.
• No bundled Open WebUI instance. This is a tool server only — bring your own Open WebUI.

Roadmap

Adding a new tool is roughly:

1. Add a Pydantic request model in openviking_openwebui/tools.py.
2. Add a route handler decorated with @router.post("/tools/<name>", operation_id="<name>").
3. Forward to the OpenViking endpoint via OVClient.
4. Add a test in tests/test_tools.py mocking the upstream call.

Likely candidates the community might want next: ov_session_create, ov_session_commit, ov_grep, ov_glob, ov_overview, ov_abstract.

Security

• Never commit OV_API_KEY to source control. Pass it via the environment.
• The tool server has no auth of its own — bind it to localhost or a private network, or front it with a proxy that enforces auth.
• Tenant identity is server-side trust: anyone with OV_API_KEY and the right X-OpenViking-Account/User headers can read that tenant's data. This matches OpenViking's standard trust model.

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中文说明

这是一个独立的 FastAPI 服务，将 OpenViking 的一组核心 HTTP 端点封装为 OpenAPI 工具，供 Open WebUI 自动发现并调用。

它做什么

Open WebUI 支持两种工具集成方式：把 Python "Functions" 粘贴进管理后台， 或对接外部 OpenAPI 工具服务器（自动从 /openapi.json 发现工具）。 本插件实现第二种方式——纯 HTTP 转发，不重复实现任何业务逻辑。

暴露的 7 个工具

ov_search、ov_recall_memories、ov_add_memory、ov_list_memories、 ov_read_resource、ov_add_resource、ov_session_status。详见上方表格。

快速开始

cd examples/openwebui-plugin
pip install -e .
OV_API_KEY=your-key python -m openviking_openwebui

默认监听 0.0.0.0:8765。

接入 Open WebUI

进入 Open WebUI 的 设置 → 工具 → 添加工具服务器，粘贴 http://localhost:8765。Open WebUI 会自动读取 /openapi.json 并把全部 7 个工具暴露给模型。

环境变量

OV_ENDPOINT、OV_API_KEY、OV_ACCOUNT、OV_USER、OV_AGENT、OV_BIND、 OV_TIMEOUT。默认值与说明见上方英文表格。

测试

pip install -e ".[test]"
pytest tests -x -q

添加更多工具

1. 在 openviking_openwebui/tools.py 中添加 Pydantic 请求模型；
2. 添加路由 handler，设置 operation_id；
3. 通过 OVClient 转发到对应 OpenViking 端点；
4. 在 tests/test_tools.py 中加 mock 测试。