How do I install the Agent Identity skill?

Run npx skillmds@latest add modbender/agent-identity-2 in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

What does the Agent Identity skill do?

Cryptographic identity for AI agents - sign and verify agent messages It is listed under AI & ML on SkillMD.

Is Agent Identity safe to use?

This skill has not completed SkillMD's automated safety review yet. Capability flags: executes scripts, makes network calls, reads secrets. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Agent Identity?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Agent Identity free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Agent Identity?

modbender (@modbender) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Agent Identity by modbender — Agent Skill

Name: Agent Identity
Rating: 4.2 (5 reviews)
Author: modbender

File contents

Agent Identity Skill

Cryptographic identity system for AI agents. Sign messages, verify agents, prove who you are.

Files included:

identity.py - Python CLI (cross-platform)
agent-identity.ps1 - PowerShell wrapper (Windows)

What it does

Generate Key Pair - Create Ed25519 or RSA keys for your agent
Sign Messages - Cryptographically sign messages
Verify Signatures - Verify messages from other agents
Agent ID - Generate persistent agent ID from public key
Agent Card - Generate signed Agent Card for A2A/MCP

Installation

# Install Python dependency
pip install cryptography

Usage

Option 1: PowerShell (recommended on Windows)

.\agent-identity.ps1 -Action generate -AgentName "MyAgent" -KeyType ed25519 -Password "secret123"

Option 2: Python CLI (cross-platform)

python identity.py generate --name MyAgent --key-type ed25519 --password secret123

Available Commands

All commands work with both PowerShell and Python:

Generate Identity (with password encryption)

.\agent-identity.ps1 -Action generate -AgentName "MyAgent" -KeyType ed25519 -Password "secret123"

Sign Message

.\agent-identity.ps1 -Action sign -Message "Hello world" -PrivateKeyPath "keys/private.pem" -Password "secret123"

Verify Signature

.\agent-identity.ps1 -Action verify -Message "Hello world" -Signature "base64-signature" -PublicKeyPath "keys/public.pem"

Get Agent ID

.\agent-identity.ps1 -Action id -PublicKeyPath "keys/public.pem"

Sign Agent Card

.\agent-identity.ps1 -Action card -PublicKeyPath "keys/public.pem" -PrivateKeyPath "keys/private.pem" -Name "MyAgent" -Description "Research agent" -Capabilities "research,analysis" -Endpoint "https://myagent.com/a2a" -Password "secret123"

⚠️ Security Warnings

Password on Command Line

WARNING: Passing passwords on the command line is insecure because:

CLI arguments can be visible to other processes
Command history is stored in logs
Use only for testing, not production

For production, use interactive password input or environment variables.

Private Key Storage

Keys are stored in keys/ directory
Ensure proper file permissions
Back up your keys securely
Never share your private key

Requirements

Python 3.8+
cryptography library

License

MIT

---name: agent-identity-2description: Cryptographic identity for AI agents - sign and verify agent messages---# Agent Identity SkillCryptographic identity system for AI agents. Sign messages, verify agents, prove who you are.**Files included:**- `identity.py` - Python CLI (cross-platform)- `agent-identity.ps1` - PowerShell wrapper (Windows)## What it does- **Generate Key Pair** - Create Ed25519 or RSA keys for your agent- **Sign Messages** - Cryptographically sign messages- **Verify Signatures** - Verify messages from other agents- **Agent ID** - Generate persistent agent ID from public key- **Agent Card** - Generate signed Agent Card for A2A/MCP## Installation```powershell# Install Python dependencypip install cryptography```## Usage### Option 1: PowerShell (recommended on Windows)```powershell.\agent-identity.ps1 -Action generate -AgentName "MyAgent" -KeyType ed25519 -Password "secret123"```### Option 2: Python CLI (cross-platform)```powershellpython identity.py generate --name MyAgent --key-type ed25519 --password secret123```## Available CommandsAll commands work with both PowerShell and Python:### Generate Identity (with password encryption)```powershell.\agent-identity.ps1 -Action generate -AgentName "MyAgent" -KeyType ed25519 -Password "secret123"```### Sign Message```powershell.\agent-identity.ps1 -Action sign -Message "Hello world" -PrivateKeyPath "keys/private.pem" -Password "secret123"```### Verify Signature```powershell.\agent-identity.ps1 -Action verify -Message "Hello world" -Signature "base64-signature" -PublicKeyPath "keys/public.pem"```### Get Agent ID```powershell.\agent-identity.ps1 -Action id -PublicKeyPath "keys/public.pem"```### Sign Agent Card```powershell.\agent-identity.ps1 -Action card -PublicKeyPath "keys/public.pem" -PrivateKeyPath "keys/private.pem" -Name "MyAgent" -Description "Research agent" -Capabilities "research,analysis" -Endpoint "https://myagent.com/a2a" -Password "secret123"```## ⚠️ Security Warnings### Password on Command Line**WARNING:** Passing passwords on the command line is insecure because:- CLI arguments can be visible to other processes- Command history is stored in logs- Use only for testing, not productionFor production, use interactive password input or environment variables.### Private Key Storage- Keys are stored in `keys/` directory- Ensure proper file permissions- Back up your keys securely- Never share your private key## Requirements- Python 3.8+- cryptography library## LicenseMIT

Frequently asked questions

Agent Identity