Koskamo

WebCrypt MCP Server

A zero-dependency Model Context Protocol server providing native Web Crypto API capabilities for AI agents. It supports AES-256-GCM symmetric encryption, RSA-4096 hybrid public keys, ECDH key agreement, ECDSA/HMAC digital signatures, and Post-Quantum KEM (Kyber/Dilithium). It enables confidential local vaulting, tamper-proof provenance, inter-agent key exchange, and post-quantum guardrails for autonomous coding agents.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

WebCrypt MCP Server logo, by putervisionCommunity listingLocal stdioSource reviewed; not executedPublished by putervision
Vendor documentation

What you can do with it

  • Encrypt API keys and state memory before writing to disk
  • Cryptographically sign test evidence packs and code diffs
  • Manage ephemeral JWK keypairs for private agent-to-agent messaging
  • Apply Post-Quantum KEM and Dilithium signatures to agent artifacts

Source and maintenance

Community listingRegistry 1.0.1
mcp-registry: io.github.putervision/webcrypt@1.0.1Source repositoryProject website
Maintenance checked

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

webcrypt 1.0.1

npm
webcrypt package definition
{
  "version": "1.0.1",
  "transport": "stdio",
  "identifier": "webcrypt",
  "registryType": "npm"
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.
Cursor configuration
{
  "mcpServers": {
    "webcrypt-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "webcrypt@1.0.1"
      ]
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.
Cline configuration
{
  "mcpServers": {
    "webcrypt-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "webcrypt@1.0.1"
      ]
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.
VS Code configuration
{
  "servers": {
    "webcrypt-mcp-server": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "webcrypt@1.0.1"
      ]
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.
Claude Desktop configuration
{
  "mcpServers": {
    "webcrypt-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "webcrypt@1.0.1"
      ]
    }
  }
}

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