WebCrypt MCP Server

Zero-dependency Web Crypto & native AI Agent Tooling (MCP) for modern JavaScript. It runs locally over stdio via the published package.

People who work with cryptography, e2ee and encryption and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in JavaScript.

VERIFIED ACTIVE

LAST COMMIT 2026-08-21 · ★ 28 · #5 OF 318 MAINTAINED FINANCE · VERIFIED 2026-09-18

MIT · JavaScript servers · how we verify → /methodology

01 · Install WebCrypt MCP Server

Claude Code

claude mcp add putervision-webcrypt -- npx -y webcrypt

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "putervision-webcrypt": {
      "command": "npx",
      "args": [
        "-y",
        "webcrypt"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

npm package webcrypt - unscoped; check the name against the project README before installing

registry namespace io.github.putervision is GitHub-verified and matches the repo owner

03 · What WebCrypt MCP Server can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

1.0.0 · 2026-08-21

0.6.2 · 2026-08-01

04 · Who maintains WebCrypt MCP Server

WebCrypt MCP Server is maintained by putervision. We track 6 MCP servers from putervision - 6 actively maintained, 210 combined GitHub stars, oldest repo from Dec 2025. Full record: all servers from putervision.

  1. State Memory MCP Deterministic, persistent graph server for tracking workflow state, decisions, and blockers. ★ 89
  2. Visual Memory MCP Local visual UI cache for AI agents using perceptual hashing + CLIP to cut vision token use. ★ 70
  3. Behavior Runtime MCP In-browser ~60Hz behavior tree execution engine with reactive triggers and safety guardrails. ★ 2
  4. Strategic Agent Reasoning MCP Strategic BDI reasoning engine for autonomous AI agents - goals, utility, and replanning. ★ 2

05 · Facts

repository
github.com/putervision/webcrypt
website
https://putervision.github.io/webcrypt/
category
finance - ranked #5 of 318 actively-maintained finance servers as of 2026-09-18.
release cadence
2 releases in the last 90 days (latest 2026-08-21)
registry
io.github.putervision/webcrypt (active, first published 2026-08-21)
packages
npm:webcrypt

06 · WebCrypt MCP Server FAQ

What is WebCrypt MCP Server?

Zero-dependency Web Crypto & native AI Agent Tooling (MCP) for modern JavaScript. It runs locally over stdio via the published package.

Is WebCrypt MCP Server still maintained?

Yes - as of 2026-09-18, its last commit was 2026-08-21 and it shipped 2 releases in the last 90 days. We re-verify nightly.

How do I install WebCrypt MCP Server?

Run `npx -y webcrypt`. You can also paste the ready-made client config above.

Does WebCrypt MCP Server run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to WebCrypt MCP Server

Alternatives to WebCrypt MCP Server

Maintained finance servers if WebCrypt MCP Server isn't the fit.

  1. CCXT Official CCXT MCP server - Market data and trading across 100+ exchanges and prediction markets ★ 44,030 · 2026-09-18
  2. Tradingview MCP Real-time market data, screeners, technical analysis & backtesting for stocks, crypto and forex. ★ 4,567 · 2026-09-01
  3. Edgar Tools Open-source SEC EDGAR toolkit - 11 tools, 7 prompts, every filing type. No API key required. ★ 2,726 · 2026-09-17
  4. TickDB Market Data Real-time & historical market data: forex, stocks, crypto, indices, metals, K-line, quotes ★ 801 · 2026-06-20
  5. xbbg MCP Local Bloomberg tools for xbbg users. ★ 715 · 2026-09-16
  6. Emilia Protocol Exact-action approval for consequential agent actions: request, track, and verify signed receipts. ★ 650 · 2026-09-17

Pairs well with

Servers that cover what WebCrypt MCP Server doesn't - only shown when the pairing reason fits the companion.

  1. Server Chart → data & analytics companion data & analytics · ★ 4,367
  2. ClaudeR - RStudio MCP Server → data & analytics companion data & analytics · ★ 342
  3. Basic Memory → productivity companion productivity · ★ 3,986
  4. Praison AI → productivity companion productivity · ★ 9,069

head to head · Edgar Tools vs WebCrypt MCP Server · CCXT vs WebCrypt MCP Server · Yahoo Finance (narumiruna) vs WebCrypt MCP Server

More finance MCP servers · Pyth Pro MCP Server · Quantakrypto Pqc Tools · Quantoracle · Quanttogo MCP (quanttogo) · Stripekit

More JavaScript MCP servers · Quicknode MCP Server · Barevalue · Qveris · Leafengines · Redact MCP · see all