MCP.Market

WebCrypt MCP Server

by putervision·io.github.putervision/webcrypt·v1.0.1·12 stars
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Zero-dependency Web Crypto & AI Agent MCP Server (AES-256-GCM, RSA-4096, PQC, Signatures).

A89/100grade A
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Safety scan
A89/100

full report

Adoption
Growing

12 stars114 downloads/wk

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WebCrypt MCP Server tools (6, 2 write)

write = sends, deletes, buys or posts

Read from the package source without running it. The installed server may list more.

  • crypto_hash

    Compute cryptographic hashes (SHA-256, SHA-384, SHA-512, SHA3-256, SHA3-384, SHA3-512).

  • decrypt_payload

    Decrypt ciphertext produced by WebCrypt back into plaintext or JSON object.

  • encrypt_payload

    Encrypt text, JSON objects, or files using AES-256-GCM symmetric or RSA-4096 hybrid asymmetric encryption.

  • manage_keys

    Generate, export, or import cryptographic keypairs (RSA-4096/2048, ECDH P-256/P-384, HMAC).

  • pqc_kem_signwrite action

    Post-Quantum Cryptography operations (Kyber KEM, Dilithium signatures, and Hybrid classical+PQC KEM).

  • sign_verifywrite action

    Create or verify digital signatures and HMAC authentication tags (ECDSA, RSA-PSS, HMAC, HMAC-SHA3).

Public scan report

scanner v0.1.10 · 2026-11-01 · same rubric, same numbers if you re-run it

no findings
  • Code scan40 source files scanned25/25
  • –Live reliabilityno gateway calls yet and no remote to proben/a
  • –Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitylocal package, no credentials required12/15
  • Maintenancelast push 72 days ago12/15
  • Maintainer identityregistry namespace matches repository owner; GitHub account older than a year9/10
Overall 89/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How WebCrypt MCP Server compares

Against every graded Finance MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
89/100
higher than 90% of 1,761 Finance servers
Tools
6
the typical Finance server has 8
Tools that change things
33%
typical: 0%. Fewer write tools means less an agent can break
GitHub stars
12
more than 90% of 946 Finance servers
Downloads a week
114
more than 71% of 421 Finance servers with a package

What its tools let an agent do: 4 read · 2 change

Install WebCrypt MCP Server in Claude Code, Cursor or VS Code

Runs npx -y webcrypt on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add webcrypt -- npx -y webcrypt
Add to Cursor

What the publisher says

From the WebCrypt MCP Server repository's README, as published. We do not edit it. Read it on GitHub

WebCrypt v1.0.1

Zero-dependency Web Crypto & native AI Agent Tooling (MCP) for modern JavaScript.

AES-256-GCM symmetric encryption, RSA-4096 hybrid public keys, ECDH key agreement, ECDSA/HMAC digital signatures, and Post-Quantum KEM (Kyber/Dilithium) — zero runtime dependencies, pure Web Crypto API.

⚡ Quickstart (15 Seconds)

1. Installation

# 📦 Install as project library (Node.js, TypeScript, Browser)
npm install webcrypt

# 🌐 Install globally (CLI utilities & global MCP tools)
npm install -g webcrypt
import { WebCrypt, WebCryptAsym } from "webcrypt";

// 🔒 Symmetric AES-256-GCM (600k PBKDF2 iterations)
const wc = new WebCrypt();
const encrypted = await wc.encryptText("Secret payload", "password");
const decrypted = await wc.decryptText(encrypted, "password");

// 🔑 Asymmetric RSA-4096 Hybrid Encryption
const wca = new WebCryptAsym();
const keyPair = await wca.generateKeyPair(4096);
const cipher = await wca.encryptText("Secret payload", keyPair.publicKey);
const plain = await wca.decryptText(cipher, keyPair.privateKey);

2. Auto-Setup for AI Agents & IDEs (MCP Server)

# Initialize MCP server, agent skills, and rules across your project
npx webcrypt init  # or `webcrypt init` if installed globally

Supports Google Antigravity, Cursor, Claude Desktop, VS Code / Copilot, Windsurf, Cline, and Zed.

🤖 Why AI Agents Need WebCrypt MCP

Equip autonomous coding agents with an authenticated cryptographic vault directly in their toolbelt:

  • 🔐 Confidential Local Vaulting (encryptpayload)**: Encrypt API keys and state memory before writing to disk to prevent prompt log leaks.
  • 🛡️ Tamper-Proof Provenance (signverify)**: Cryptographically sign test evidence packs, release binaries, and code diffs with ECDSA or HMAC.
  • 🤝 Inter-Agent Key Exchange (managekeys)**: Ephemeral JWK keypairs (RSA-4096, ECDH P-256/P-384) for private agent-to-agent messaging.
  • ⚛️ Post-Quantum Guardrails (pqckemsign): Built-in Kyber KEM and Dilithium signatures future-proof long-term agent artifacts.
  • ⚡ Zero Dependencies: 100% native crypto.subtle execution across Node.js 18+, Bun, browsers, and Edge runtimes.

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

WebCrypt MCP Server: common questions

Is WebCrypt MCP Server safe?
Yes, by our scan: it is graded A (89/100). Read the WebCrypt MCP Server safety report
How do I install WebCrypt MCP Server?
It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does WebCrypt MCP Server need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is WebCrypt MCP Server maintained?
The last commit was 74 days ago (2026-08-21). The latest release is v1.0.1.
What can I use instead of WebCrypt MCP Server?
Servers from other publishers that do the same job: Blockrun MCP server, Agent402.Tools: pay-per-call web tools MCP server and Yolfi Payments MCP server.
How does WebCrypt MCP Server compare with other Finance MCP servers?
safety score 89/100 (higher than 90% of 1,761 Finance servers); tools 6 (the typical Finance server has 8); tools that change things 33% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.

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