OKF Vault

A pluggable Model Context Protocol (MCP) server and headless CLI for the Open Knowledge Format (OKF). Knowledge is stored in PostgreSQL for fast, ranked retrieval, but every read still round-trips as OKF markdown — so the wire format stays human- and agent-friendly while the storage is optimized.

Features

• REST API — Full CRUD for bundles and concepts, OpenAPI docs at /docs
• MCP server — Agent-optimized tools, resource templates (okf://{bundle}/{path+}), prompts, stdio or Streamable HTTP transport
• Full-text search — Postgres tsvector + pg_trgm with typo-tolerant fuzzy matching
• Scope-based organization — Global, named, and project scopes
• Live directory synthesis — index.md (§6) and log.md (§7) synthesized on read
• Graph traversal — {concept}.links and {concept}.backlinks extract OKF references
• Rate limiting — Sliding-window (configurable RPS), per-IP
• Correlation IDs — x-request-id tracing across all requests
• Auth — Bearer token via API_KEY config
• CORS — Configurable origin allowlist or *

How to Use

Docker Compose (recommended)

git clone https://github.com/alexandre-leites/okf-vault && cd okf-vault
cp .env.example .env
docker compose up -d            # Postgres + vault server
# Server is running at http://localhost:3000

Dockerfile only

docker build -t okf-vault server/
docker run -d \
  -e DATABASE_URL=postgres://okfvault:okfvault@host:5432/okf_vault \
  -p 3000:3000 \
  okf-vault

Manual build

# Requirements: Node.js >= 22.13, PostgreSQL >= 14
npm install
cp .env.example .env            # or cp server/okfvault.example.yaml okfvault.yaml
npm run build
node dist/cli.js migrate        # apply database migrations
node dist/cli.js serve          # REST API + MCP

How to Connect Using MCP

The server exposes MCP via two transports:

Transport	URL/Mechanism	When to use
Streamable HTTP	http://<host>:3000/mcp	Remote clients, shared setups
stdio	spawned as subprocess	Local, no network needed

Start the server:

okfvault serve --host 0.0.0.0 --port 3000 --migrate
# MCP endpoint:  http://<host>:3000/mcp

If API_KEY is set, include Authorization: Bearer <API_KEY> in HTTP headers or pass it in the client's environment. Set MCP_TRANSPORT to stdio or http to restrict to a single transport (default both).

See the client's own docs for wiring details:

• opencode MCP docs
• Claude MCP docs
• Cursor MCP docs

MCP Tools

Tool	Description
okf_concept_search	Search memory; returns lightweight previews (link, title, snippet)
okf_concept_get	Hydrate one concept by link or bundle+path (tracks read count)
okf_concept_upsert	Create-or-update a concept (saves a version snapshot on update)
okf_bundle_index	Directory listing of a bundle (progressive disclosure)
okf_bundle_list	List all bundles
okf_bundle_create	Create a bundle
okf_concept_links	Outbound OKF references from a concept's body
okf_concept_backlinks	Concepts referencing a given concept
okf_concept_history	List a concept's version snapshots
okf_concept_read_version	Read a specific historical version
okf_bundle_delete	Destructive — soft-delete a bundle and its concepts
okf_concept_delete	Destructive — soft-delete a concept

Bundle naming: use the reserved global bundle (always present, case-insensitive) for cross-project knowledge (preferences, standards); use the git repository or project name for project-specific knowledge. Bundle slugs, concept paths, and okf:// URIs are case-insensitive and normalized to lowercase.

MCP Resources

Pattern	Description
okf://{bundle}/{path+}	Concept document as markdown

MCP Prompts

Prompt	Description
create_concept	Guides concept creation with correct args

REST API

Method	Path	Description
GET	/health	Health check
POST	/okf/bundles	Create a bundle
GET	/okf/bundles	List bundles
DELETE	/okf/bundles/{bundle}	Soft-delete a bundle (cascades)
GET	/okf/bundles/{bundle}	Directory listing (markdown)
GET	/okf/bundles/{bundle}/index.md	Directory listing (§6)
GET	/okf/bundles/{bundle}/log.md	Update history (§7)
GET	/okf/bundles/{bundle}/{concept}.md	Read a concept
POST	/okf/bundles/{bundle}/{concept}.md	Create a concept
PUT	/okf/bundles/{bundle}/{concept}.md	Update a concept
DELETE	/okf/bundles/{bundle}/{concept}.md	Soft-delete a concept
GET	/okf/bundles/{bundle}/{concept}.links	Links from this concept
GET	/okf/bundles/{bundle}/{concept}.backlinks	Links to this concept
GET	/okf/search	Ranked full-text + structured search

Interactive docs at /docs; OpenAPI spec at /openapi.json.

CLI

okfvault migrate                                            # apply migrations
okfvault bundle create acme-sales --title "Acme Sales"
okfvault bundle list
okfvault bundle index acme-sales --markdown                 # progressive disclosure
okfvault concept create acme-sales tables/orders --type "BigQuery Table" --title Orders
okfvault concept read acme-sales tables/orders
okfvault search --bundle acme-sales --type Playbook "revenue"
okfvault serve --migrate                                    # migrate then serve

Configuration

Resolved with precedence CLI flags > OKFVAULT_* environment variables > config file > defaults. Config file: ./okfvault.yaml, ~/.config/okfvault/config.yaml, or $OKFVAULT_CONFIG (YAML, supports comments).

All config keys require the OKFVAULT_* prefix to avoid collisions with CI/Docker/orchestrator environment variables.

Config key	Environment variable	CLI argument	Type / Example	Default
DATABASE_URL	OKFVAULT_DATABASE_URL	--database-url	postgres://user:pass@host:5432/db	postgres://okfvault:okfvault@localhost:5432/okf_vault
DATABASE_TEST_URL	OKFVAULT_DATABASE_TEST_URL	(test-only)	postgres://user:pass@host:5432/okf_test	(empty — integration tests skip)
HOST	OKFVAULT_HOST	--host	0.0.0.0	0.0.0.0
PORT	OKFVAULT_PORT	--port	3000	3000
LOG_LEVEL	OKFVAULT_LOG_LEVEL	--log-level	info, debug, warn, error, trace	info
LOG_PRETTY	OKFVAULT_LOG_PRETTY	--log-pretty	true, false, 1, 0	false
CORS_ORIGINS	OKFVAULT_CORS_ORIGINS	--cors-origins	* or http://a.com,http://b.com	(empty — disabled)
API_KEY	OKFVAULT_API_KEY	--api-key	my-secret-token	(empty — auth disabled)
MAX_BODY_SIZE	OKFVAULT_MAX_BODY_SIZE	--max-body-size	1048576	1048576
RATE_LIMIT_RPS	OKFVAULT_RATE_LIMIT_RPS	--rate-limit-rps	100	100
MCP_TRANSPORT	OKFVAULT_MCP_TRANSPORT	--mcp-transport	both, stdio, http, sse	both
BUNDLE_STORAGE_ENABLED	OKFVAULT_BUNDLE_STORAGE_ENABLED	--enable-bundle-storage	true, false	false
BUNDLE_STORAGE_PATH	OKFVAULT_BUNDLE_STORAGE_PATH	--bundle-storage-path	/data/okf-vault	(empty — disabled)

Development

# All commands run from the project root; npm delegates to server/
npm run dev          # CLI with hot reload (tsx watch)
npm run typecheck    # Type-check with tsc
npm run lint         # Lint with ESLint
npm run db:generate  # Generate a new migration from schema changes
npm test             # Vitest (integration tests skip without
                      # OKFVAULT_DATABASE_TEST_URL)

# You can also run commands directly inside server/
cd server && npm test

Architecture

See docs/ARCHITECTURE.md for the full architecture breakdown.

The server source lives in server/.

Community

• Code of Conduct
• Contributing Guide
• Changelog
• Security Policy

License

Apache License 2.0 with NOTICE.

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Non-Affiliation Disclaimer

This project is an independent implementation of the Open Knowledge Format (OKF) specification and is not affiliated with, sponsored by, or endorsed by Google LLC. All code in this repository was written independently from scratch.