Summary
Gives Claude direct access to Python's cryptography library through a comprehensive set of tools. You get symmetric encryption with Fernet and AES, asymmetric operations with RSA and X25519, standard hashing functions like SHA-256 and SHA-512, HMAC signing and verification, and key derivation through PBKDF2 and Scrypt. It also handles X.509 certificate generation and parsing, plus utilities for generating random bytes. Reach for this when you need Claude to perform cryptographic operations during a conversation without writing custom code, whether that's encrypting sensitive data, generating keys, signing messages, or working with certificates. All operations run locally through stdio transport.
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Get the MCP →mcp-cryptography
MCP server exposing cryptography library functionality.
mcp-name: io.github.daedalus/mcp-cryptography
Install
pip install mcp-cryptography
Usage
from mcp_cryptography import mcp
# Run the MCP server
if __name__ == "__main__":
mcp.run()
Available Tools
The server provides the following cryptographic tools:
Key Generation
generate_symmetric_key- Generate a Fernet symmetric keygenerate_rsa_key- Generate an RSA key pairgenerate_x25519_key- Generate an X25519 key pair
Symmetric Encryption
fernet_encrypt/fernet_decrypt- Fernet encryptionaes_encrypt/aes_decrypt- AES encryption (CBC/GCM modes)
Asymmetric Encryption
rsa_encrypt/rsa_decrypt- RSA OAEP encryptionrsa_sign/rsa_verify- RSA digital signatures
Hashing
hash_sha256- SHA-256 hashhash_sha512- SHA-512 hashhash_sha1- SHA-1 hash
HMAC
hmac_sign- Generate HMAChmac_verify- Verify HMAC
Key Derivation
pbkdf2_derive- PBKDF2 key derivationscrypt_derive- Scrypt key derivation
X.509 Certificates
generate_self_signed_cert- Generate self-signed certificateparse_certificate- Parse X.509 certificate
Utilities
generate_random_bytes- Generate random bytesgenerate_random_base64- Generate random base64 bytes
Development
git clone https://github.com/daedalus/mcp-cryptography.git
cd mcp-cryptography
pip install -e ".[test]"
# run tests
pytest
# format
ruff format src/ tests/
# lint
ruff check src/ tests/
# type check
mcp_cryptography src/
Featured
Keeps your Mac awake while Claude Code, Codex or Cursor works. Lets it sleep when they are done.
Try free for 7 days →Block distracting apps from your iPhone permanently without a 3rd party app. Free and open source.
Block now (100% free) →Notes, actions and memory. Without a meeting bot. First month 100% off.
Download for free →belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →Free an open-source skills that make AI coding agents easier to understand, verify, and control.
Download for free →Connect your Claude agent to live crypto prices and trading routes via 1inch
Get the MCP →