Read the summary before the source. Generated directory abstracts (L0) and overviews (L1) let agents judge relevance before opening full content (L2). →. L0 (Abstract): a one-sentence summary for quick relevance checks.. L1 (Overview): core information and usage scenarios for planning.
Tools
Tools
No tool list yet. Remote servers get one after the first health check.
Copy the stdio config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.
Does OpenViking need an API key?
No required environment variable is listed on this record.
What transport does OpenViking use?
OpenViking runs locally over stdio.
When was OpenViking last checked?
Last checked 2026-11-11. Read the summary before the source. Generated directory abstracts (L0) and overviews (L1) let agents judge relevance before opening full content (L2). →. L0 (Abstract): a one-sentence summary for quick relevance checks.. L1 (Overview): core information and usage scenarios for planning.
Website · Live Demo · GitHub · Issues · Docs · Blog
What is OpenViking
OpenViking is an open-source context database for AI agents — one filesystem for everything an agent knows: knowledge, memory, and skills.
Most agent memory is a black box: text goes in, embeddings come out, and nobody can see what was actually stored. OpenViking organizes context as a virtual filesystem under viking:// instead. Agents navigate it like files — ls, tree, read, write, grep — and you can open any directory to inspect and edit what your agent knows. Every directory carries a generated summary, so agents can scan summaries first and decide what to read.
01. Read the summary before the source. Generated directory abstracts (L0) and overviews (L1) let agents judge relevance before opening full content (L2). →
02. L0 (Abstract): a one-sentence summary for quick relevance checks.
03. L1 (Overview): core information and usage scenarios for planning.
04. L2 (Details): the full original data, read only when needed.
One filesystem for knowledge, memory, and skills. Resources hold documents and code; memories retain user preferences and experience; skills define how to perform tasks — not just extracted facts, but the full context, each with a viking:// URI for browsing and retrieval. → Viking URI · Context types
Search a directory, not the whole index. Scope semantic search to a project or memory subtree instead of scanning a flat vector pool. find runs a query directly; search plans retrieval from session context. → Retrieval
Read the summary before the source. Generated directory abstracts (L0) and overviews (L1) let agents judge relevance before opening full content (L2). → Context layers
Sessions become files you can read. Committing a session archives the conversation and extracts memories as Markdown you can inspect, edit, and merge. With VikingBot enabled, ov compile organizes source material into a wiki, knowledge graph, or report. → Sessions · Context compilation
OpenViking 0.3.22 has been evaluated on long-conversation user memory (LoCoMo) and multi-turn agent tasks (tau2-bench). Full results and setup details, including knowledge-base QA, are in the benchmark report; reproduction scripts live in ./benchmark.
To run your own experiments, follow the RAG and Memory evaluation guide for routine VikingBot memory evaluation, published LoCoMo reproduction, separate mem0 prompt comparisons, and RAG evaluation.
User memory (LoCoMo): with OpenViking, all three agent integrations land at 80–83% accuracy — up from 24–57% on their native memory — while input tokens drop by 34.3–91.0% and query latency by 58.45–66.10%.
Agent experience (tau2-bench): experience memory lifts task success by +6.87pp (retail) and +11.87pp (airline) over the same LLM without memory.
Quick start
Set up an OpenViking server first; if you already have one, skip to Use it with your agent. Deploying your own needs uv, Python 3.10+ and a model provider with an embedding model and a VLM.
Follow this guide to install and start an OpenViking Server for me:
https://docs.openviking.ai/en/getting-started/04-setup-for-agent
Ask me for the model provider, the models, the workspace directory and whether
other machines need to reach the server; don't guess. When you ask for the model
API key, tell me how to hand it over if I'd rather not paste it into this chat,
and never repeat it back.
When it's running, tell me the server's address and whether auth is turned on.
Your agent will first ask which model provider to use and for its API key.
Install OpenViking and run the setup wizard, which configures the models:
init writes ~/.openviking/ov.conf and supports Volcengine, OpenAI, Codex OAuth, Kimi, GLM and local Ollama; see the configuration guide. The server runs in the foreground, so keep this terminal open.
The same OpenViking service, run for you by Volcengine. The first 50 files are free. Activate it on the Volcengine product page, then create an API key in the console under User Management → API Key. The server address is https://api.vikingdb.cn-beijing.volces.com/openviking; you'll need it and the API key when you connect your agent.
Explore with the CLI
The openviking package includes the ov CLI. With the server running, import a repository and search it:
ov status
ov add-resource https://github.com/volcengine/OpenViking
# Replace TASK_ID with the returned task_id; repeat until status is completed
ov task status TASK_ID
ov ls viking://resources/
ov tree viking://resources/volcengine -L 2
ov find "what is openviking"
ov grep "openviking" --uri viking://resources/volcengine/OpenViking/docs/en
ov find returns matching context with URIs you can inspect. For client configuration (ov config), standalone CLI installs, and index maintenance, see CLI setup.
Connect your coding agent to OpenViking for cross-session memory. The memory plugin installer covers Claude Code, Codex, Cursor, TRAE, OpenCode and more, and detects which ones you have.
Install the OpenViking memory plugin and help me start using it. OpenViking is a context database for AI agents (https://github.com/volcengine/OpenViking); the command and link below are from its official docs.
1. Run the official installer. It needs network access and writes to my home directory; if your sandbox blocks that, ask me for approval:
curl -fsSL https://openviking.ai/install | bash -s -- --yes --lang en --url <SERVER_URL> --api-key <API_KEY>
2. Once it's installed, read the OpenViking onboarding guide and use it to walk me through setup. The guide has you ask me before choices like importing history or adding a working rule. docs.openviking.ai and docs.openviking.net are the same docs site; use whichever loads:
https://docs.openviking.ai/agents/en/onboarding.md
The API key is a user key I created for myself on that server; the installer stores it in ~/.openviking/ovcli.conf on this machine. Use it in the command as it is; there's no need to show it in your replies, and don't write it into any other file or rule. Talk to me in English.
Before you send it, replace <SERVER_URL> with your server's address and <API_KEY> with a user key; a root key can't read or write memories. If the server has auth turned off, use --api-key ''.
Run the installer, then pick the tools and a server when asked: Self-hosted / local for a server on this machine, Volcengine OpenViking Cloud for OpenViking Service, or Custom URL for any other address. If auth is on, enter a user key, not the root key.
curl -fsSL https://openviking.ai/install | bash
# AI agents: not sure about running this? The script's header says what it does and how to verify it.
Then restart your agent. The installer ends with the next steps for each tool, for example:
Claude Code
Next: restart Claude Code
⋮
Verify: run /openviking-memory:ov in a session
On its first start Codex stops at Hooks need review; choose Trust all and continue.
Try it: ask it to remember one of your preferences, then ask about it in a new session a little later. Memories are processed in the background, so it's normal not to find one right after you say it.
The installer needs macOS or Linux, Node.js 18+ and curl, no sudo. On Windows, use the desktop app.
Setup guides for each integration:
General integrations
For setup instructions and integration details, see Integrations.
The desktop app is a console for macOS and Windows x64 (beta). It configures supported local agent integrations, inspects recall and capture events in sessions, and syncs local memories and skills to OpenViking.
Memory that evolves with your agent. VikingMem develops an event-driven approach to extracting, updating, and consolidating long-term memory, giving stateful agents a way to retain useful experience as interactions accumulate. OpenViking open-sources a subset of these core capabilities.
VikingMem: A Memory Base Management System for Stateful LLM-based Applications
Jiajie Fu, Junwen Chen, Mengzhao Wang, Aoxiang He, Maojia Sheng, Xiangyu Ke, Yifan Zhu, and Yunjun Gao.
arXiv:2605.29640, 2026. Presented at VLDB 2026 in September.
📄 Read the paper on arXiv · Read PDF
Directory structure as retrieval context. This paper provides the formal foundations, index design, and experimental evidence behind OpenViking’s directory-aware retrieval. It defines directory-scoped query and maintenance operations and introduces TrieHI, which OpenViking integrates to resolve directory scopes before vector ranking. This connects the filesystem paradigm to retrieval: agents can search a project or memory subtree, retain its surrounding context, and reorganize it as knowledge evolves.
Directory-Aware Query and Maintenance in Vector Databases
Mengzhao Wang, Zheng Gong, Jingpei Hu, Jiajie Fu, Maojia Sheng, Junwen Chen, and Yifan Zhu.
arXiv:2606.16903, 2026. Accepted by ICDE.
📄 Read the paper on arXiv · Read PDF
Retrieve the evidence you need with fewer tokens. VikingRAG combines semantic search with document structure, exposing relevant directory segments as evidence gaps arise. Its core mechanisms are integrated into OpenViking. The paper further explores reusing retrieval traces and escalating to multi-round retrieval only when needed, reducing repeated exploration while preserving answer quality.
VikingRAG: Accurate and Token-efficient Retrieval-augmented Generation over Structured Documents
Peiyuan Gao, Gaoyuan Zhang, Haojie Qin, Yahui Sun, Qianyi Zhang, Yunhao Zhang, Zeyu Wang, and Wei Lu.
arXiv:2609.11390, 2026. Submitted.
📄 Read the paper on arXiv · Read PDF
The OpenViking project uses different licenses for different components:
Main Project: AGPLv3 - see the LICENSE file for details
crates/ov_cli: Apache 2.0 - see the LICENSE for details
examples: Apache 2.0 - see the LICENSE for details. The Hermes plugin in examples/hermes-plugin retains its MIT license.
integrations/frameworks: the LangChain/LangGraph adapter uses AGPLv3 and the Microsoft Agent Framework adapter uses MIT; see each package's LICENSE. Their runnable examples retain Apache 2.0; see each package's examples/LICENSE.
third_party: Respective original licenses of third-party projects
Please also note: any wholesale rewriting and subsequent re-open-sourcing of this project is prohibited; any request to translate all or a substantial portion of the project code into another coding language requires prior written authorization from Volcano Engine. For permission requests, please contact the Volcano Engine team — see Community & Contributing for contact channels.