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• q-ring

  I4cTime

  A

  license

  A

  quality

  A

  maintenance

  OS keychain secrets for AI coding agents, over MCP. Anchors credentials to the native vault (macOS Keychain, Linux Secret Service, Windows Credential Vault) and exposes them through 44 policy-governed tools: per-environment values, TTL, linked rotation, encrypted transfer bundles, redacted exec, and a tamper-evident audit log. Local-first, no cloud account.

  Updated 19 hours ago (2026-10-13 02:50 UTC)

  46

  115 npm

  4

  AGPL 3.0
• 

  COTI Private Messaging MCPofficial

  coti-io

  A

  license

  -Not graded

  quality

  C

  maintenance

  Enables private encrypted messaging between AI agents or wallets for secure coordination.

  Updated 3 months ago (2026-06-29 20:13 UTC)

  77 npm

  Apache 2.0

• parseltongue-capsules

  0xreconlion

  A

  license

  -Not graded

  quality

  B

  maintenance

  Lets an agent manage local identities and public contact cards, and hide a message inside ordinary-looking cover text via concealment carriers, while inspecting and verifying sealed notes and encrypted capsules entirely on the user's own machine. Passphrases and plaintext stay in the companion CLI, and neither server has any outbound network capability.

  Updated 12 days ago (2026-10-02 01:35 UTC)

  AGPL 3.0

• Post-Quantum Cryptography MCP

  scottdhughes

  A

  license

  -Not graded

  quality

  C

  maintenance

  Enables AI assistants to perform quantum-resistant cryptographic operations using NIST-standardized algorithms including ML-KEM, ML-DSA, and SPHINCS+. Supports key generation, encryption, digital signatures, and security analysis for post-quantum cryptography research and development.

  Updated 6 months ago (2026-04-12 13:14 UTC)

  1

  MIT

• genpark-quantum-teleportation

  Alpha-Park

  A

  license

  -Not graded

  quality

  B

  maintenance

  Enables zero-dependency quantum circuit simulation with state-vector evolution, Hadamard/CNOT entanglement, Born-rule measurement, EPR Bell pair generation, and Grover amplitude amplification, exposed natively over MCP for Claude Desktop, Cursor, and Windsurf.

  Updated 16 days ago (2026-09-28 04:05 UTC)

  7

  MIT

• QR Code MCP Server

  cympfh

  F

  license

  -Not graded

  quality

  D

  maintenance

  Enables the generation of QR codes in PNG, SVG, Base64, and ASCII formats via Model Context Protocol clients. Users can save codes directly to local files or display them as terminal-friendly art through natural language commands.

  Updated 8 months ago (2026-02-03 02:14 UTC)

  -