A white-label Model Context Protocol server that gives selected AI agents bounded, auditable access to propose changes to an Obsidian vault stored in GitHub.
Each agent receives its own expiring MCP bearer token. The GitHub credential remains server-side. Read and write paths, denials, protected surfaces, proposal branches, and token revocation are controlled by operator-owned YAML files.
A permissioned MCP gateway for agent proposals to a Git-backed Obsidian vault.
This is an independent open-source project. It is not affiliated with or endorsed by Obsidian or GitHub.
Why use it?
Giving an agent a general GitHub token is difficult to constrain and easy to misuse. This server creates a narrower boundary:
AI agent + individual MCP token
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identity + fixed broker
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agent write scope AND broker publication scope
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deny, path, frontmatter, mutability, size, and secret checks
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server-side GitHub App token
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proposal branch for human review
The service has no tools for deleting files, merging branches, pushing to main or master, changing repository settings, editing workflows, or exposing credentials.
Features
Stateless MCP Streamable HTTP transport
Unique, expiring bearer tokens stored as SHA-256 bindings
Per-agent read, write, and deny path globs
Separate Git broker allowlists and fixed proposal branches
Configurable frontmatter requirements for shared or sensitive surfaces
living, review-first, append-only, and immutable note handling
Path-traversal prevention and file-extension/size allowlists
Credential-shaped-content detection
Repository-restricted GitHub App tokens with PAT fallback for local testing
Content-free JSONL audit records
Host/origin validation, security headers, rate limiting, and HTTP timeouts
Docker, CI, tests, and deployment documentation
MCP tools
Tool
Purpose
vault_whoami
Show the authenticated identity, broker, branch, and policy scopes.
vault_list_allowed_paths
Explain effective read/write/deny boundaries.
vault_explain_access
Dry run a single path. Report whether read, list, or write would be permitted and which policy rule decides it. No GitHub call.
vault_list_files
List an authorised directory while filtering denied children.
vault_read_file
Read an authorised UTF-8 vault file.
vault_create_file
Create a file on the identity's fixed proposal branch.
vault_update_file
Update a permitted file while respecting mutability.
vault_append_file
Append while preserving all existing bytes.
Requirements
Node.js 22+
An Obsidian vault in a GitHub repository
A dedicated non-default proposal branch for each broker
A GitHub App installed only on the vault repository with Contents: read and write, or a fine-grained PAT for local testing
Quick start
Install from source (the current supported path):
git clone https://github.com/YOUR_ACCOUNT/obsidian-github-mcp.git
cd obsidian-github-mcp
npm ci
cp .env.example .env
cp config/policy.example.yaml config/policy.yaml
cp config/tokens.example.yaml config/tokens.yaml
npm run token:new
npm run check
# Configure .env with your GitHub repository and token/app credentials before starting:
npm start
Configure .env (specifying your repository and either a GITHUB_TOKEN or GitHub App credentials), replace the sample policy, and put only the generated token's SHA-256 in config/tokens.yaml. Give the raw bearer token to exactly one MCP client.
To verify a checkout before configuring a running service:
npm ci
npm run check
npm run test:e2e
These checks use synthetic notes, mock GitHub responses and loopback transports.
They need no GitHub or MCP credentials. Note regressions cover Unicode/path
encoding, CRLF frontmatter, malformed metadata, UTF-8 size limits and append-only
byte preservation. CI runs the same checks on Linux and Windows with Node.js 22
and 24. The 8 tools listed above are the current server surface; tests do not
publish proposals to a real vault.
Once v0.1.0 is published to npm, a global install will also be available:
# Available once v0.1.0 is published (not yet on the npm registry).
npm install -g @sarutobi-sasuke/obsidian-github-mcp
The default endpoints are:
GET http://127.0.0.1:3210/healthz
POST http://127.0.0.1:3210/mcp
MCP clients must send:
Authorization: Bearer vault_<generated-token>
Permission model
The effective write scope is the intersection of the agent grant and its broker:
The server creates short-lived installation tokens restricted again to the configured repository and contents: write. A repository-scoped GITHUB_TOKEN is supported as a local-development fallback.
Deployment
The included container runs as a non-root user with a read-only root filesystem. Put TLS, a private overlay network, or an authenticated gateway in front of the service before making it remotely reachable.
Run npm run test:e2e for a clean tarball installation and real MCP HTTP client proof against a test-only GitHub substitute. It exercises proposal writes, denied paths/content, immutable and append-only notes, stale-write conflicts, invalid policy reloads, live token revocation and content-free audit records. CI runs this proof on Windows/Linux with Node 22/24, and the release workflow requires it.
Policy and token files reject unknown keys. Only policy_version: 1 and authority: operator-only are supported. Correct misspelt fields or remove unsupported metadata before upgrading; silently ignored restrictions are no longer accepted. Release evidence and remaining gates.
The draft MCP Registry npm entry describes a self-hosted Streamable HTTP process,
not a stdio server. A compatible client starts the process with the declared
environment and connects to http://127.0.0.1:{VAULT_MCP_PORT}/mcp (port 3210 by
default). Supply the existing policy and token-file paths plus the repository
owner/name. For GitHub access, use either GITHUB_TOKEN or all three documented
GitHub App variables. The manifest cannot express that alternative group;
runtime configuration validates it. The process does not create credentials,
provision a hosted endpoint or bypass its existing bearer-token checks.
The namespace preserves the exact GitHub owner spelling. prepublishOnly
includes the registry/package gate; no login or publication is performed by it.
Security
Read Security policy before deployment. Report suspected vulnerabilities privately rather than opening a public issue with exploit details.
Chưa có danh sách công cụ. Máy chủ từ xa sẽ có danh sách sau lần kiểm tra tình trạng đầu tiên.
Câu hỏi thường gặp
Câu hỏi
Làm thế nào để cài đặt Obsidian GitHub MCP?
Sao chép cấu hình stdio cho Cursor, Claude Desktop, Claude Code hoặc VS Code trên trang này. Cấu hình dùng bản cài đặt của nhà phát hành, không phải proxy của PlugMCP.
Obsidian GitHub MCP có cần khóa API không?
Nhà phát hành liệt kê các biến môi trường sau: VAULT_MCP_PORT, VAULT_MCP_GITHUB_OWNER, VAULT_MCP_GITHUB_REPO, VAULT_MCP_POLICY_FILE, VAULT_MCP_TOKEN_FILE, GITHUB_TOKEN, GITHUB_APP_ID, GITHUB_APP_INSTALLATION_ID, GITHUB_APP_PRIVATE_KEY_FILE.
Obsidian GitHub MCP dùng giao thức truyền tải nào?
Obsidian GitHub MCP chạy cục bộ qua stdio.
Obsidian GitHub MCP được kiểm tra lần cuối khi nào?
Kiểm tra lần cuối: 2026-11-09. A permissioned MCP gateway for agent proposals to a Git-backed Obsidian vault.