Protect MCP Setup
wshobson/agents
Configure Cedar policy enforcement and Ed25519 signed receipts for Claude Code tool calls.
Teaches the agent to use the WebCrypt MCP server for AES-256-GCM symmetric encryption, RSA-4096 hybrid encryption, key generation, digital signatures, hashing, and post-quantum cryptography.
Install Webcrypt MCP
$ npx skills add putervision/state-memory-mcp --skill webcrypt-mcp -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install putervision/state-memory-mcp webcrypt-mcp --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/putervision/state-memory-mcp.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/webcrypt-mcp .claude/skills/webcrypt-mcp && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "webcrypt-mcp" agent skill from https://github.com/putervision/state-memory-mcp/tree/main/.agents/skills/webcrypt-mcp into .claude/skills/webcrypt-mcp/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "webcrypt-mcp", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/putervision/state-memory-mcp/tree/main/.agents/skills/webcrypt-mcpType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add putervision/state-memory-mcp --skill webcrypt-mcp -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install putervision/state-memory-mcp webcrypt-mcp --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/putervision/state-memory-mcp.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/webcrypt-mcp .agents/skills/webcrypt-mcp && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "webcrypt-mcp" agent skill from https://github.com/putervision/state-memory-mcp/tree/main/.agents/skills/webcrypt-mcp into .agents/skills/webcrypt-mcp/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "webcrypt-mcp", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add putervision/state-memory-mcp --skill webcrypt-mcp -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install putervision/state-memory-mcp webcrypt-mcp --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/putervision/state-memory-mcp.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/webcrypt-mcp .cursor/skills/webcrypt-mcp && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "webcrypt-mcp" agent skill from https://github.com/putervision/state-memory-mcp/tree/main/.agents/skills/webcrypt-mcp into .cursor/skills/webcrypt-mcp/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "webcrypt-mcp", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/putervision/state-memory-mcp.git --path .agents/skills/webcrypt-mcp--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add putervision/state-memory-mcp --skill webcrypt-mcp -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install putervision/state-memory-mcp webcrypt-mcp --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/putervision/state-memory-mcp.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/webcrypt-mcp .gemini/skills/webcrypt-mcp && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "webcrypt-mcp" agent skill from https://github.com/putervision/state-memory-mcp/tree/main/.agents/skills/webcrypt-mcp into .gemini/skills/webcrypt-mcp/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "webcrypt-mcp", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install putervision/state-memory-mcp webcrypt-mcpInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add putervision/state-memory-mcp --skill webcrypt-mcp -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/putervision/state-memory-mcp.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/webcrypt-mcp .github/skills/webcrypt-mcp && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "webcrypt-mcp" agent skill from https://github.com/putervision/state-memory-mcp/tree/main/.agents/skills/webcrypt-mcp into .github/skills/webcrypt-mcp/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "webcrypt-mcp", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add putervision/state-memory-mcp --skill webcrypt-mcp -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install putervision/state-memory-mcp webcrypt-mcp --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/putervision/state-memory-mcp.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/webcrypt-mcp .opencode/skills/webcrypt-mcp && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "webcrypt-mcp" agent skill from https://github.com/putervision/state-memory-mcp/tree/main/.agents/skills/webcrypt-mcp into .opencode/skills/webcrypt-mcp/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "webcrypt-mcp", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
webcrypt-mcp- GitHub stars
- 111
- Token cost
- ~847 tokens
- SKILL.md length
- 300 words
- Files
- 1
- Skills in repo
- 7
- Repo updated
- First seen
- Licence
- MIT
At a glance
Teaches the agent to use the WebCrypt MCP server for AES-256-GCM symmetric encryption, RSA-4096 hybrid encryption, key generation, digital signatures, hashing, and post-quantum cryptography.
- Works in 4 steps: Mandatory Workflow & Priority → Complete Tool Reference → Automated MCP Tool Exercise & Verification → …
- Tasks that involve Cryptography
- SKILL.md covers 1. Mandatory Workflow & Priority, 2. Complete Tool Reference, 3. Automated MCP Tool Exercise… and 4. Agent Permissions &…
- Calls node
What it does
Webcrypt MCP is an agent skill from putervision/state-memory-mcp. Teaches the agent to use the WebCrypt MCP server for AES-256-GCM symmetric encryption, RSA-4096 hybrid encryption, key generation, digital signatures, hashing, and post-quantum cryptography. Includes automated test scripts for exercising all MCP tools.
Its SKILL.md is about 850 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Security, covering Cryptography and MCP servers. It works with Model Context Protocol. The repository describes itself as: Persistent, branch-aware workflow state memory MCP server for AI coding assistants. Tracks tasks, accepted decisions, and active blockers to prevent session context bloat and… The licence is MIT.
When your agent uses it
- Tasks that involve Cryptography
- Tasks that involve MCP servers
Example prompts
- “Use the webcrypt-mcp skill to teach the agent to use the WebCrypt MCP server for AES-256-GCM symmetric encryption, RSA-4096 hybrid encryption, key…”
- “/webcrypt-mcp”
Requirements
- Node.js
Workflow steps
4 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit 0f60ae4. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
node
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Webcrypt MCP loads about 847 tokens when it runs. Until then it costs about 66 tokens; SKILL.md has 300 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from putervision/state-memory-mcp at commit 0f60ae4, republished under its MIT licence (© putervision). 300 words, ~847 tokens.
Download SKILL.mdSave it as
.claude/skills/webcrypt-mcp/SKILL.md (or your agent's skills folder).- name
- webcrypt-mcp
- description
- Teaches the agent to use the WebCrypt MCP server for AES-256-GCM symmetric encryption, RSA-4096 hybrid encryption, key generation, digital signatures, hashing, and post-quantum cryptography. Includes automated test scripts for exercising all MCP tools.
Cryptographic Memory & Vault Tooling (webcrypt-mcp)
This project provides webcrypt-mcp, a native Model Context Protocol server for zero-dependency AES-256-GCM encryption, RSA-4096 hybrid public-key encryption, digital signatures, cryptographic hashes, and post-quantum cryptography.
1. Mandatory Workflow & Priority
- Confidential Artifacts: Whenever saving sensitive credentials, tokens, or private workflow states, encrypt them using
encrypt_payload(mode: "data", password: "...")orencrypt_payload(mode: "symmetric", password: "..."). - Key Management: Use
manage_keys(action: "generate", type: "rsa" | "ecdh" | "ecdsa" | "rsa-pss" | "hmac")to generate cryptographically strong JWK-formatted keys for inter-agent communication. - Integrity & Signatures: Before completing tasks that produce verifiable evidence (such as evidence packs or release binaries), compute signatures or HMAC tags using
sign_verify(action: "sign", algorithm: "ECDSA" | "HMAC"). - Triple Memory Triad:
state-memory-mcp: Workflow state tracking.vision-memory-mcp: Visual state caching.webcrypt-mcp: Encryption of sensitive DAG nodes, visual cache database vaults, and signature verification.
2. Complete Tool Reference
| Tool Name | Key Inputs | Description |
|---|---|---|
encrypt_payload | mode ('symmetric' | 'asymmetric' | 'data'), data, password?, public_key_jwk? | Encrypt plaintext, JSON object, or binary data. |
decrypt_payload | mode ('symmetric' | 'asymmetric' | 'data'), ciphertext, password?, private_key_jwk? | Decrypt ciphertext back to plaintext or structured JSON. |
manage_keys | action ('generate' | 'generate_random_password'), type ('rsa' | 'ecdh' | 'ecdsa' | 'rsa-pss' | 'hmac'), modulusLength?, namedCurve?, length? | Generate cryptographic keys (JWK format) or secure random passwords. |
crypto_hash | algorithm ('SHA-256' | 'SHA-384' | 'SHA-512' | 'SHA3-256' | 'SHA3-512'), data, encoding ('hex' | 'base64') | Compute cryptographic hash digests. |
sign_verify | action ('sign' | 'verify'), algorithm ('ECDSA' | 'RSA-PSS' | 'HMAC' | 'HMAC-SHA3'), data, signature?, password?, key_jwk? | Sign or verify messages with ECDSA, RSA-PSS, or HMAC. |
pqc_kem_sign | action ('generate_kyber_keypair' | 'kyber_encapsulate' | 'kyber_decapsulate' | 'hybrid_encapsulate' | 'hybrid_decapsulate' | 'generate_dilithium_keypair' | 'dilithium_sign' | 'dilithium_verify'), level?, public_key_b64?, private_key_b64?, ... | Post-quantum Kyber KEM, Dilithium signatures, and Hybrid KEM. |
3. Automated MCP Tool Exercise & Verification
To verify that the MCP server and all 6 tools are operating correctly in the current environment:
node .agents/skills/webcrypt-mcp/scripts/exercise_tools.js4. Agent Permissions & Auto-Run Configuration
To allow WebCrypt MCP tools to run seamlessly without interactive confirmation:
- Add
"command(webcrypt-mcp)"or"command(npx webcrypt mcp)"to global agent permission grants.
© putervision, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in .agents/skills/webcrypt-mcp of putervision/state-memory-mcp.
Open the folder on GitHubat commit 0f60ae4
Compare with similar skills
Webcrypt MCP next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Webcrypt MCP this skillputervision/state-memory-mcp | 111 | — | ~847 | Automated safety check: Pass | MIT | |
| Protect MCP Setupwshobson/agents | 40k | — | ~2.1k | Automated safety check: Pass | MIT | |
| Forensifyalexgreensh/repo-forensics | 187 | — | ~2.5k | Automated safety check: Notes | Custom licence | |
| Plugin Scanneriflytek/skillhub | 5.2k | 2 repos | ~1.1k | Automated safety check: Notes | Apache-2.0 | |
| X Use Setupihuzaifashoukat/x-use | 171 | — | ~731 | Automated safety check: Warn | MIT | |
| Security Passcyanheads/pubmed-mcp-server | 154 | — | ~6.4k | Automated safety check: Pass | Apache-2.0 |
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Plugin Scanner
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Scan AI agent skills, plugins, MCP servers, and agent tooling for prompt injection, unsafe commands, secret exposure, and supply-chain risks before installing or trusting them.
X Use Setup
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Review an MCP server for common security gaps: LLM-facing surfaces as injection vector (tools, resources, prompts, descriptions), scope blast radius, destructive ops without consent, upstream auth…
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Related
Works with
Categories
Questions about Webcrypt MCP
What does Webcrypt MCP do?
Teaches the agent to use the WebCrypt MCP server for AES-256-GCM symmetric encryption, RSA-4096 hybrid encryption, key generation, digital signatures, hashing, and post-quantum cryptography. Webcrypt MCP is an agent skill from putervision/state-memory-mcp. Teaches the agent to use the WebCrypt MCP server for AES-256-GCM symmetric encryption, RSA-4096 hybrid encryption, key generation, digital signatures, hashing, and post-quantum cryptography.
When should I use Webcrypt MCP?
Webcrypt MCP fits situations like: tasks that involve Cryptography; tasks that involve MCP servers.
How do I install Webcrypt MCP in Claude Code?
Run `npx skills add putervision/state-memory-mcp --skill webcrypt-mcp -a claude-code`. Or copy the skill folder (.agents/skills/webcrypt-mcp in putervision/state-memory-mcp) into .claude/skills/webcrypt-mcp in your project. Claude Code loads it when a task matches its description.
How do I install Webcrypt MCP in Codex?
Run `npx skills add putervision/state-memory-mcp --skill webcrypt-mcp -a codex`. Or copy the skill folder (.agents/skills/webcrypt-mcp in putervision/state-memory-mcp) into .agents/skills/webcrypt-mcp in your project. Codex loads it when a task matches its description.
Can I use Webcrypt MCP in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add putervision/state-memory-mcp --skill webcrypt-mcp -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/webcrypt-mcp, .gemini/skills/webcrypt-mcp, .github/skills/webcrypt-mcp and .opencode/skills/webcrypt-mcp in your project.
What does Webcrypt MCP need to run?
Going by SKILL.md and its folder, Webcrypt MCP needs the command-line tools its instructions call (node). Our summary lists: Node.js.
Does Webcrypt MCP access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Webcrypt MCP safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Webcrypt MCP use?
Webcrypt MCP is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Webcrypt MCP use?
About 847 tokens (SKILL.md is roughly 3.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Webcrypt MCP?
Skills that share tags, products or a category with Webcrypt MCP: Protect MCP Setup (wshobson/agents, 40k stars), Forensify (alexgreensh/repo-forensics, 187 stars), Plugin Scanner (iflytek/skillhub, 5.2k stars) and X Use Setup (ihuzaifashoukat/x-use, 171 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Webcrypt MCP?
putervision (a GitHub organization) maintains it in putervision/state-memory-mcp, which has 111 GitHub stars. The repository holds 7 skills in this directory. The repository was last updated on October 3, 2026.
Source: putervision/state-memory-mcp on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.