Crypto_MCP
Crypto_MCP is a server for encryption, decryption, and hashing operations.
AES Encryption/Decryption: 128-bit AES with various modes (ECB, CBC, CFB, OFB, CTR), padding options, and formats (base64, hex)
DES Encryption/Decryption: 64-bit DES with multiple modes and format options
Hashing Algorithms: MD5, SHA1, SHA224, SHA256, SHA384, and SHA512
Click on "Deploy Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type
@followed by the MCP server name and your instructions, e.g., "@Crypto_MCP encrypt this message with AES using CBC mode"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
📝 Description
A Model Context Protocol (MCP) server for encrypting/decrypting/algorithm/hash.
Related MCP server: Filesystem MCP Server
📺 Demo

✨ Features
Support AES encryption and decryption (128 bits)
Support mode: ECB, CBC, CFB, OFB, CTR
Support padding mode: Pkcs7, Iso97971, AnsiX923, Iso10126, ZeroPadding, NoPadding.
Support output format: base64, hex
Support input format: base64, hex
Support MD5, SHA1, SHA256, SHA384, SHA512, SHA224 algorithm
Support DES encryption and decryption (64 bits)
Support mode: ECB, CBC, CFB, OFB, CTR
Support padding mode: Pkcs7, Iso97971, AnsiX923, Iso10126, ZeroPadding, NoPadding.
Support Base64 encode and decode
Support Hex encode and decode
🔮 Comming Soon
Support more encryption and decryption algorithms
📦 Installation
Installing via Smithery
To install Crypto_MCP for Claude Desktop automatically via Smithery:
npx -y @smithery/cli install @1595901624/crypto-mcp --client claudeManual Installation
Clone the Repository
git clone https://github.com/1595901624/crypto-mcp.gitInstall Dependencies
pnpm installBuild the Project
pnpm run buildAdd to your Claude Desktop MCP settings file
{
"mcpServers": {
"crypto-mcp": {
"command": "node",
"args": ["path/to/crypto-mcp/build/index.js"],
"disabled": false,
"autoApprove": []
}
}
}🔧 Usage
Available Tools
AES
aes_encrypt: Encrypt text with AES parameters:text: The text to encrypt (Required)key: The key to encrypt the text (optional, default is your-key-0123456)padding: The padding mode (optional, default is Pkcs7)outputFormat: The output format (optional, default is base64)iv: The initialization vector (optional, default is your-iv-01234567)mode: The mode to encrypt the text (optional, default is ECB)
aes_decrypt: Decrypt text with AES parameters:text: The text to decrypt (Required)key: The key to decrypt the text (optional, default is your-key-0123456)padding: The padding mode (optional, default is Pkcs7)inputFormat: The input format (optional, default is base64)iv: The initialization vector (optional, default is your-iv-01234567)mode: The mode to decrypt the text (optional, default is ECB)
Digest
md5: Calculate MD5 hash of a string parameters:input: The input string to hash (Required)
sha1: Calculate SHA-1 hash of a string parameters:input: The input string to hash (Required)
sha256: Calculate SHA-256 hash of a string parameters:input: The input string to hash (Required)
sha384: Calculate SHA-384 hash of a string parameters:input: The input string to hash (Required)
sha512: Calculate SHA-512 hash of a string parameters:input: The input string to hash (Required)
sha224: Calculate SHA-224 hash of a string parameters:input: The input string to hash (Required)
DES
des_encrypt: Encrypt text with DES parameters:text: The text to encrypt (Required)key: The key to encrypt the text (optional, default is your-key)padding: The padding mode (optional, default is Pkcs7)outputFormat: The output format (optional, default is base64)iv: The initialization vector (optional, default is your-iv-)mode: The mode to encrypt the text (optional, default is ECB)
des_decrypt: Decrypt text with DES parameters:text: The text to decrypt (Required)key: The key to decrypt the text (optional, default is your-key)padding: The padding mode (optional, default is Pkcs7)inputFormat: The input format (optional, default is base64)iv: The initialization vector (optional, default is your-iv-)mode: The mode to decrypt the text (optional, default is ECB)
Base64
base64_encode: Encode text to base64 parameters:content: The text to encode (Required)
base64_decode: Decode base64 to text parameters:content: The base64 text to decode (Required)
Hex
hex_encode: Encode text to hex parameters:content: The text to encode (Required)
hex_decode: Decode hex to text parameters:content: The hex text to decode (Required)
📝 Development
# Install dependencies
npm install
# Build the project
npm run build
# Development with auto-rebuild
npm run watch📝 License
This project is licensed under the MIT License. See the LICENSE file for details.
Available Tools
14 toolsaes_decryptC
decrypt text with aes
Inputs: content (required), key, padding, inputFormat, +2 more.
aes_encryptC
encrypt text with aes
Inputs: content (required), key, padding, outputFormat, +2 more.
base64_decodeC
decode base64 to text
Inputs: content (required).
base64_encodeB
encode text to base64
Inputs: content (required).
des_decryptC
decrypt text with des
Inputs: content (required), key, iv, padding, +2 more.
des_encryptC
encrypt text with des
Inputs: content (required), key, iv, padding, +2 more.
hex_decodeC
decode hex to text
Inputs: content (required).
hex_encodeA
encode text to hex
Inputs: content (required).
md5A
Calculate MD5 hash of a string
Inputs: input (required).
sha1B
Calculate SHA-1 hash of a string
Inputs: input (required).
sha224B
Calculate SHA-224 hash of a string
Inputs: input (required).
sha256B
Calculate SHA-256 hash of a string
Inputs: input (required).
sha384B
Calculate SHA-384 hash of a string
Inputs: input (required).
sha512B
Calculate SHA-512 hash of a string
Inputs: input (required).
Tool Schema Changelog
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
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TDQS
Scored across 14 tools
Each tool targets a distinct algorithm or operation, and the encrypt/decrypt and encode/decode pairs are clearly separated. The six hash tools are all described similarly and overlap in purpose, though the algorithm name (md5, sha256, etc.) provides enough distinction.
Encryption/encoding tools follow an algorithm_verb pattern (aes_encrypt, base64_decode, hex_encode), but hash tools are bare algorithm names (sha256, md5, sha384) with no verb, creating inconsistent conventions. The style is readable but not uniformly patterned.
14 tools is within a reasonable range for a cryptography utility server. The count is slightly padded by six SHA/MD5 hash variants that could arguably be one parameterized tool, but it is still a well-scoped collection.
The set covers symmetric encryption, common hashes, and encodings, but misses common crypto operations like HMAC, digital signatures, asymmetric encryption, and key generation. These are notable gaps for a server with the broad name Crypto_MCP, though the included core operations are solid.
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