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Searchable catalog of Model Context Protocol servers. Find tools that connect your AI assistant to the services and data you use.

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  1. Servers
  2. /Cryptography
  3. /AffixIO
CryptographyCommunity
A

AffixIO

Zero-knowledge proofs and post-quantum attestations for AI agents. AffixIO lets AI agents prove facts like age, eligibility or payment authority without exposing personal data. 102 tools for generating and verifying zero-knowledge proofs, ML-DSA-65 post-quantum attestations, single-use proof IDs and agent trust checks. Hosted MCP server (Streamable HTTP, OAuth 2.1 with PKCE, dynamic client registration) with sign-in through AffixIO Studio. AI agents get 150 free proofs and humans 100, no card needed. Repo: https://github.com/AffixIO/affixio-mcp-hosted Homepage: https://www.affix-io.com Docs: https://www.affix-io.com/docs/quickstart/ Contact: affixio@mail.grokbot.com

0 starsUpdated Oct 28, 2026
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Installation

npx -y mcp-remote https://www.affix-io.com/mcp/

Configuration

{
  "mcpServers": {
    "affixio": {
      "url": "https://www.affix-io.com/mcp/"
    }
  }
}
Add to Cursor

Paste into ~/.cursor/mcp.json or .cursor/mcp.json

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Reliability + security proxy that sits in front of MCP servers: TOFU tool-definition pinning against rug pulls, tool-poisoning and cross-server-exfiltration detection, argument/command-injection blocking, inline secret redaction, MCP 2026-07-28 header/body validation (`-32020`) and cache-policy clamping, and a compliance-mapped audit trail (NIST AI RMF / OWASP). Coverage measured on an open benchmark with a held-out corpus. `npx -y mcp-bastion`

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elberacasa/umbra

Trust score and guardrails for AI-generated code: static security rules, Docker-verified build/boot checks, and claim receipts that catch agents lying about tests. Tools: `scan_repo`, `guard_content`, `get_score`. Run with `npx --yes -p @elberacasa/umbra umbra-mcp`.

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M2M-Sentinel/m2m-sentinel-sdk

Deterministic EVM bytecode capability intelligence, EIP-1967 proxy resolution, gas recommendations, and preflight safety intelligence for autonomous agents on Base (`Chain ID: 8453`). Supports stdio and hosted SSE. `npx -y m2m-sentinel-sdk`

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Drumworks/ssid-mcp

MAC-address (OUI) vendor lookup and router default-login directory for AI agents. Identify a device manufacturer from its MAC address, detect randomized/private (locally-administered) addresses instead of reporting "unknown", or fetch a router's default login IP and admin credentials — every router field cited to the manufacturer's own documentation. Free tier, no signup. `npx -y ssid-mcp`

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Policy proxy that governs what AI assistants can reach and do: refuses forbidden tool calls before the upstream is contacted, with per-user memory and a tamper-evident audit. Stops prompt-injection exfiltration and forbidden data combinations across Slack, Drive, GitHub and more. `pip install aggrete`.

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SaravananJaichandar/etch-mcp

Signed audit chain for AI agent decisions. Every event signed, Merkle-chained per project, anchored to public transparency logs, and offline-verifiable against a pinned public key without dependency on our infrastructure. Post-hoc evidence primitive, complementary to runtime enforcement (not a substitute). Zero-signup try-it-now: `curl -X POST https://etch.systems/v1/your-project` returns a bearer token you can drop into any MCP client.

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