Which MCP clients are mentioned as supported?

The README names Cursor, Kiro, and Claude Code. Cursor is among the supported clients listed here.

Can q-ring store separate values for different environments?

Yes. A secret can have dev, staging, and production values, resolved using an environment flag, QRING_ENV, NODE_ENV, Git branch heuristics, project configuration, or a default.

Does q-ring require an external API key?

The provided material describes local OS keychain storage and does not specify an external API key requirement.

Quantum Ring

secretscryptographysecuritydeveloper-toolsmcp

Stores and serves secrets through OS keychains with MCP tools for AI coding agents.

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

One-click editor setup isn’t available for this listing yet — we don’t have a confirmed install command, and we’d rather show nothing than point your editor at the wrong package or host. Follow the project’s own setup instructions, linked above.

Manual Client & Custom JSON ConfigExpand JSON ▾

No confirmed setup config for this listing yet. We only publish a config block when the install details come from the project itself — its README, its docs, or a verified owner. We haven’t found those for I4cTime/quantum_ring, and we’d rather show nothing than a guess you’d paste into your client. Follow the project’s own setup instructions for the current steps.

Overview

q-ring stores credentials in macOS Keychain, Linux Secret Service, or Windows Credential Vault instead of plain-text environment files. It provides 44 MCP tools and supports context-aware secret states, linked credentials, ephemeral secrets, and encrypted secret bundles. Use it when an AI coding agent needs controlled access to local secrets.

Use cases

Store API keys in the operating system keychain

Resolve different secret values for development, staging, and production

Link credentials across projects for coordinated rotation

Create secrets that expire after a time or read count

Share AES-256-GCM encrypted secret bundles

Key features

OS-native secret storage

44 built-in MCP tools

Environment-aware secret resolution

Cross-project key linking

Ephemeral in-memory secrets

AES-256-GCM encrypted secret bundles

Capabilities & Tool Schemas

Inspect callable tools, capabilities, and parameters exposed to AI agents by Quantum Ring.

Extracted Tool Capabilities

OS-native secret storage

44 built-in MCP tools

Environment-aware secret resolution

Cross-project key linking

Ephemeral in-memory secrets

AES-256-GCM encrypted secret bundles

Documentation Overview

q-ring

OS keychain secrets for AI coding agents, over MCP.

Stop pasting API keys into plain-text .env files or wrestling with clunky secret managers. q-ring securely anchors your credentials to your OS's native vault (macOS Keychain, Linux Secret Service, Windows Credential Vault) and supercharges them with mechanics from quantum physics.

📖 View the Official Documentation for a complete CLI reference, MCP prompt cookbooks, and architecture details.

Why q-ring?

Superposition: Store one key with multiple states (dev/staging/prod) that collapse based on context.
Entanglement: Link keys across projects so rotating one automatically updates them all.
Tunneling: Create ephemeral, in-memory secrets that self-destruct after a set time or read count.
Teleportation: Securely pack and share AES-256-GCM encrypted secret bundles.
Seamless AI Integration: 44 built-in MCP tools for native use in Cursor, Kiro, and Claude Code.

🚀 Installation

q-ring is designed to be installed globally so it's available anywhere in your terminal. Pick your favorite package manager:

bash

# pnpm (recommended)
pnpm add -g @i4ctime/q-ring

# npm
npm install -g @i4ctime/q-ring

# yarn
yarn global add @i4ctime/q-ring

# Homebrew (macOS / Linux)
brew install i4ctime/tap/qring

Docker (MCP server)

The repo ships a Dockerfile that builds the MCP server and exposes it through mcp-proxy — useful for hosted MCP deployments (e.g. Glama) or keeping the server off the host entirely:

bash

git clone https://github.com/I4cTime/q-ring.git
cd q-ring
docker build -t qring-mcp .
docker run --rm -p 8080:8080 qring-mcp

Note: inside a container there is no OS keychain (GNOME Keyring / macOS Keychain), so this path is for the MCP protocol surface, ephemeral use, and CI experiments — not for durable local secret storage. For day-to-day use install the CLI natively via one of the package managers above.

⚡ Quick Start

bash

# 1️⃣ Store a secret (prompts securely if value is omitted)
qring set OPENAI_API_KEY sk-...

# 2️⃣ Retrieve it anytime
qring get OPENAI_API_KEY

# 3️⃣ List all keys (values are never shown)
qring list

# 4️⃣ Generate a cryptographic secret and save it
qring generate --format api-key --prefix "sk-" --save MY_KEY

# 5️⃣ Run a full health scan
qring health

# Something not working? Diagnose the install (keyring, audit, MCP wiring)
qring doctor

# Tab completion for your shell
qring completion zsh > ~/.zsh/completions/_qring   # also: bash, fish

Quantum Features

Superposition — One Key, Multiple Environments

A single secret can hold different values for dev, staging, and prod simultaneously. The correct value resolves based on your current context.

bash

# Set environment-specific values
qring set API_KEY "sk-dev-123" --env dev
qring set API_KEY "sk-stg-456" --env staging
qring set API_KEY "sk-prod-789" --env prod

# Value resolves based on context
QRING_ENV=prod qring get API_KEY   # → sk-prod-789
QRING_ENV=dev  qring get API_KEY   # → sk-dev-123

# Inspect the quantum state
qring inspect API_KEY

Wavefunction Collapse — Smart Environment Detection

q-ring auto-detects your environment without explicit flags. Resolution order:

--env flag
QRING_ENV environment variable
NODE_ENV environment variable
Git branch heuristics (main/master → prod, develop → dev)
.q-ring.json project config
Default environment from the secret

bash

# See what environment q-ring detects
qring env

# Project config (.q-ring.json)
echo '{"env": "staging", "branchMap": {"release/*": "staging"}}' > .q-ring.json

Quantum Decay — Secrets with TTL

Secrets can have a time-to-live. Expired secrets are blocked from reads. Stale secrets (75%+ lifetime) trigger warnings.

bash

# Set a secret that expires in 1 hour
qring set SESSION_TOKEN "tok-..." --ttl 3600

# Set with explicit expiry
qring set CERT_KEY "..." --expires "2026-06-01T00:00:00Z"

# Health check shows decay status
qring health

Observer Effect — Audit Everything

Every secret read, write, and delete is logged with a tamper-evident hash chain. Access patterns are tracked for anomaly detection.

server.ts

# View audit log
qring audit
qring audit --key OPENAI_KEY --limit 50

# Detect anomalies (burst access, unusual hours, chain tampering)
qring audit --anomalies

# Verify audit chain integrity
qring audit:verify

# Export audit log
qring audit:export --format json --since 2026-03-01
qring audit:export --format csv --output audit-report.csv

Quantum Noise — Secret Generation

Generate cryptographically strong secrets in common formats.

bash

qring generate                          # API key (default)
qring generate --format password -l 32  # Strong password
qring generate --format uuid            # UUID v4
qring generate --format token           # Base64url token
qring generate --format hex -l 64       # 64-byte hex
qring generate --format api-key --prefix "sk-live-" --save STRIPE_KEY

Entanglement — Linked Secrets

Link secrets across projects. When you rotate one, all entangled copies update automatically.

bash

# Entangle two secrets
qring entangle API_KEY API_KEY_BACKUP

# Now updating API_KEY also updates API_KEY_BACKUP
qring set API_KEY "new-value"

# Unlink entangled secrets
qring disentangle API_KEY API_KEY_BACKUP

Tunneling — Ephemeral Secrets

Create secrets that exist only in memory. They never touch disk. Optional TTL and max-read self-destruction.

bash

# Create an ephemeral secret (returns tunnel ID)
qring tunnel create "temporary-token-xyz" --ttl 300 --max-reads 1

# Read it (self-destructs after this read)
qring tunnel read tun_abc123

# List active tunnels
qring tunnel list

Teleportation — Encrypted Sharing

Pack secrets into AES-256-GCM encrypted bundles for secure transfer between machines. Keys are derived with PBKDF2-HMAC-SHA512 (210 000 iterations) from your passphrase; each bundle records its iteration count, so bundles produced by older versions still unpack.

bash

# Pack secrets (prompts for passphrase)
qring teleport pack --keys "API_KEY,DB_PASS" > bundle.txt

# On another machine: unpack (prompts for passphrase)
cat bundle.txt | qring teleport unpack

# Preview without importing
qring teleport unpack <bundle> --dry-run

Import — Bulk Secret Ingestion

Import secrets from .env files directly into q-ring. Supports standard dotenv syntax including comments, quoted values, and escape sequences. The CLI accepts either a file path or raw content; the import_dotenv MCP tool only accepts raw content (it never reads files from disk) so an agent can't coerce it into reading arbitrary local files.

server.ts

# Import all secrets from a .env file
qring import .env

# Import to project scope, skipping existing keys
qring import .env --project --skip-existing

# Preview what would be imported
qring import .env --dry-run

Selective Export

Export only the secrets you need using key names or tag filters.

server.ts

# Export specific keys
qring export --keys "API_KEY,DB_PASS,REDIS_URL"

# Export by tag
qring export --tags "backend"

# Combine with format
qring export --keys "API_KEY,DB_PASS" --format json

Secret Search and Filtering

Filter qring list output by tag, expiry state, or key pattern.

bash

# Filter by tag
qring list --tag backend

# Show only expired secrets
qring list --expired

# Show only stale secrets (75%+ decay)
qring list --stale

# Glob pattern on key name
qring list --filter "API_*"

Read the full README →View source on GitHub →

Related MCP Servers

View all in Security View all alternatives

Adoption & maintenance

Factual signals from GitHub, npm, and our automated checks — not a rating.

GitHub stars

Stargazers on the source repository.

Last commit

5d ago

Most recent push to the default branch.

Directory activity

1 views

Config copies, upvotes, and views on AllMCPs.

Reviews

No reviews yet — be the first to share how this listing worked for you.

Frequently Asked Questions about Quantum Ring

q-ring supports macOS Keychain, Linux Secret Service, and Windows Credential Vault.

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Technical Specs & Signals

CategorySecurity

PricingFree

11/11 checks healthy over the last 33d

44Quality signal: Fair · 44/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership10/20

Documentation & tools18/30

Adoption & activity5/15

Community engagement0/10

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More in 🔒 Security →Best MCP servers for Security →Alternatives to Quantum Ring →Install in Claude Desktop Install in Cursor Install in VS Code

Quantum Ring

secretscryptographysecuritydeveloper-toolsmcp

Stores and serves secrets through OS keychains with MCP tools for AI coding agents.

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Manual Client & Custom JSON ConfigExpand JSON ▾

Overview

Use cases

Store API keys in the operating system keychain

Resolve different secret values for development, staging, and production

Link credentials across projects for coordinated rotation

Create secrets that expire after a time or read count

Share AES-256-GCM encrypted secret bundles

Key features

OS-native secret storage

44 built-in MCP tools

Environment-aware secret resolution

Cross-project key linking

Ephemeral in-memory secrets

AES-256-GCM encrypted secret bundles

Capabilities & Tool Schemas

Inspect callable tools, capabilities, and parameters exposed to AI agents by Quantum Ring.

Extracted Tool Capabilities

OS-native secret storage

44 built-in MCP tools

Environment-aware secret resolution

Cross-project key linking

Ephemeral in-memory secrets

AES-256-GCM encrypted secret bundles

Documentation Overview

q-ring

OS keychain secrets for AI coding agents, over MCP.

📖 View the Official Documentation for a complete CLI reference, MCP prompt cookbooks, and architecture details.

Why q-ring?

Superposition: Store one key with multiple states (dev/staging/prod) that collapse based on context.
Entanglement: Link keys across projects so rotating one automatically updates them all.
Tunneling: Create ephemeral, in-memory secrets that self-destruct after a set time or read count.
Teleportation: Securely pack and share AES-256-GCM encrypted secret bundles.
Seamless AI Integration: 44 built-in MCP tools for native use in Cursor, Kiro, and Claude Code.

🚀 Installation

q-ring is designed to be installed globally so it's available anywhere in your terminal. Pick your favorite package manager:

bash

# pnpm (recommended)
pnpm add -g @i4ctime/q-ring

# npm
npm install -g @i4ctime/q-ring

# yarn
yarn global add @i4ctime/q-ring

# Homebrew (macOS / Linux)
brew install i4ctime/tap/qring

Docker (MCP server)

The repo ships a Dockerfile that builds the MCP server and exposes it through mcp-proxy — useful for hosted MCP deployments (e.g. Glama) or keeping the server off the host entirely:

bash

git clone https://github.com/I4cTime/q-ring.git
cd q-ring
docker build -t qring-mcp .
docker run --rm -p 8080:8080 qring-mcp

Note: inside a container there is no OS keychain (GNOME Keyring / macOS Keychain), so this path is for the MCP protocol surface, ephemeral use, and CI experiments — not for durable local secret storage. For day-to-day use install the CLI natively via one of the package managers above.

⚡ Quick Start

bash

# 1️⃣ Store a secret (prompts securely if value is omitted)
qring set OPENAI_API_KEY sk-...

# 2️⃣ Retrieve it anytime
qring get OPENAI_API_KEY

# 3️⃣ List all keys (values are never shown)
qring list

# 4️⃣ Generate a cryptographic secret and save it
qring generate --format api-key --prefix "sk-" --save MY_KEY

# 5️⃣ Run a full health scan
qring health

# Something not working? Diagnose the install (keyring, audit, MCP wiring)
qring doctor

# Tab completion for your shell
qring completion zsh > ~/.zsh/completions/_qring   # also: bash, fish

Quantum Features

Superposition — One Key, Multiple Environments

A single secret can hold different values for dev, staging, and prod simultaneously. The correct value resolves based on your current context.

bash

# Set environment-specific values
qring set API_KEY "sk-dev-123" --env dev
qring set API_KEY "sk-stg-456" --env staging
qring set API_KEY "sk-prod-789" --env prod

# Value resolves based on context
QRING_ENV=prod qring get API_KEY   # → sk-prod-789
QRING_ENV=dev  qring get API_KEY   # → sk-dev-123

# Inspect the quantum state
qring inspect API_KEY

Wavefunction Collapse — Smart Environment Detection

q-ring auto-detects your environment without explicit flags. Resolution order:

--env flag
QRING_ENV environment variable
NODE_ENV environment variable
Git branch heuristics (main/master → prod, develop → dev)
.q-ring.json project config
Default environment from the secret

bash

# See what environment q-ring detects
qring env

# Project config (.q-ring.json)
echo '{"env": "staging", "branchMap": {"release/*": "staging"}}' > .q-ring.json

Quantum Decay — Secrets with TTL

Secrets can have a time-to-live. Expired secrets are blocked from reads. Stale secrets (75%+ lifetime) trigger warnings.

bash

# Set a secret that expires in 1 hour
qring set SESSION_TOKEN "tok-..." --ttl 3600

# Set with explicit expiry
qring set CERT_KEY "..." --expires "2026-06-01T00:00:00Z"

# Health check shows decay status
qring health

Observer Effect — Audit Everything

Every secret read, write, and delete is logged with a tamper-evident hash chain. Access patterns are tracked for anomaly detection.

server.ts

# View audit log
qring audit
qring audit --key OPENAI_KEY --limit 50

# Detect anomalies (burst access, unusual hours, chain tampering)
qring audit --anomalies

# Verify audit chain integrity
qring audit:verify

# Export audit log
qring audit:export --format json --since 2026-03-01
qring audit:export --format csv --output audit-report.csv

Quantum Noise — Secret Generation

Generate cryptographically strong secrets in common formats.

bash

qring generate                          # API key (default)
qring generate --format password -l 32  # Strong password
qring generate --format uuid            # UUID v4
qring generate --format token           # Base64url token
qring generate --format hex -l 64       # 64-byte hex
qring generate --format api-key --prefix "sk-live-" --save STRIPE_KEY

Entanglement — Linked Secrets

Link secrets across projects. When you rotate one, all entangled copies update automatically.

bash

# Entangle two secrets
qring entangle API_KEY API_KEY_BACKUP

# Now updating API_KEY also updates API_KEY_BACKUP
qring set API_KEY "new-value"

# Unlink entangled secrets
qring disentangle API_KEY API_KEY_BACKUP

Tunneling — Ephemeral Secrets

Create secrets that exist only in memory. They never touch disk. Optional TTL and max-read self-destruction.

bash

# Create an ephemeral secret (returns tunnel ID)
qring tunnel create "temporary-token-xyz" --ttl 300 --max-reads 1

# Read it (self-destructs after this read)
qring tunnel read tun_abc123

# List active tunnels
qring tunnel list

Teleportation — Encrypted Sharing

bash

# Pack secrets (prompts for passphrase)
qring teleport pack --keys "API_KEY,DB_PASS" > bundle.txt

# On another machine: unpack (prompts for passphrase)
cat bundle.txt | qring teleport unpack

# Preview without importing
qring teleport unpack <bundle> --dry-run

Import — Bulk Secret Ingestion

server.ts

# Import all secrets from a .env file
qring import .env

# Import to project scope, skipping existing keys
qring import .env --project --skip-existing

# Preview what would be imported
qring import .env --dry-run

Selective Export

Export only the secrets you need using key names or tag filters.

server.ts

# Export specific keys
qring export --keys "API_KEY,DB_PASS,REDIS_URL"

# Export by tag
qring export --tags "backend"

# Combine with format
qring export --keys "API_KEY,DB_PASS" --format json

Secret Search and Filtering

Filter qring list output by tag, expiry state, or key pattern.

bash

# Filter by tag
qring list --tag backend

# Show only expired secrets
qring list --expired

# Show only stale secrets (75%+ decay)
qring list --stale

# Glob pattern on key name
qring list --filter "API_*"

Read the full README →View source on GitHub →

Related MCP Servers

View all in Security View all alternatives

Adoption & maintenance

Factual signals from GitHub, npm, and our automated checks — not a rating.

GitHub stars

Stargazers on the source repository.

Last commit

5d ago

Most recent push to the default branch.

Directory activity

1 views

Config copies, upvotes, and views on AllMCPs.

Reviews

No reviews yet — be the first to share how this listing worked for you.

Frequently Asked Questions about Quantum Ring

q-ring supports macOS Keychain, Linux Secret Service, and Windows Credential Vault.

AllMCPs Directory Badge

Full Badge Customizer

Showcase your server listing on GitHub or your project documentation. Embed this dynamic SVG badge to highlight official listing status and live engagement.

Badge Style:

Live Dynamic SVG Preview

Markdown (GitHub README)

[![AllMCPs](https://allmcps.com/api/badge/i4ctime-quantum-ring?style=directory)](https://allmcps.com/mcp/i4ctime-quantum-ring)

HTML Embed

<a href="https://allmcps.com/mcp/i4ctime-quantum-ring"><img src="https://allmcps.com/api/badge/i4ctime-quantum-ring?style=directory" alt="Quantum Ring on AllMCPs" /></a>

Technical Specs & Signals

CategorySecurity

PricingFree

11/11 checks healthy over the last 33d

44Quality signal: Fair · 44/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership10/20

Documentation & tools18/30

Adoption & activity5/15

Community engagement0/10

★ Featured

AllMCPs Server

Explore Server →

Own this project?

Free dofollow backlink: add your website and place the AllMCPs badge on it — no claim needed. We detect it automatically and keep it verified as long as the badge stays live.

Claim & get free dofollow

Share & Embed

Add our SVG badge (dark/light directory styles) or embeddable widget to your site.

Explore more

More in 🔒 Security →Best MCP servers for Security →Alternatives to Quantum Ring →Install in Claude Desktop Install in Cursor Install in VS Code