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CipherHUB Cryptography Toolkit
io.github.bowenerchen/cipherhub in the official MCP registry.
Endpoint https://tools.cipherhub.cloud/cipherhub/mcp. Source: github.com/bowenerchen/CipherHUB-MCP-Server.
The registry describes it as: Production-grade cryptography toolkit with 31 MCP tools for classical, PQC, and KMS workflows.
We read its 55 tools on 2026-10-22. Nothing in them matched our tool-poisoning rules.
A clean read means these rules found nothing, not that the server is harmless. A server can change its tools at any time, which is why the index reads it again every week.
Tools it advertises
hello generate_random_data hash_sum hmac_sum key_derivation block_cipher stream_cipher data_padding generate_rsa rsa_encryption rsa_decryption rsa_sign rsa_verify generate_ecc ecc_key_exchange ecc_key_sign ecc_key_verify generate_sm2 sm2_encryption sm2_decryption sm2_sign sm2_verify sm2_private_key_structure_parse sm2_public_key_to_hex zuc_cipher ctr_cipher xts_cipher cert_parse cert_verify generate_sm9 sm9_extract_key sm9_encryption sm9_decryption sm9_sign sm9_verify ml_kem_keygen ml_kem_encap ml_kem_decap ml_dsa_keygen ml_dsa_sign ml_dsa_verify ml_dsa_compute_mu hybrid_kex cbor_encode cbor_decode cose_sign1_sign cose_sign1_verify cose_sign1_parse cms_enveloped_encrypt cms_enveloped_decrypt cms_enveloped_parse cms_signed_sign cms_signed_verify asn1_parse der_encode
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[](https://lazaretto.dev/mcp-registry/io-github-bowenerchen-cipherhub)How this was checked
Lazaretto connects to the endpoint the way any MCP client does, asks the server to introduce itself and list its tools, and reads every name, description, parameter schema and server instruction for tool poisoning: hidden directive blocks, orders to read local secrets, parameters built to carry secrets or the conversation out, orders that redirect another server's tools, and invisible characters. It never calls a tool. What we found across the registry.
To run the same check every time Claude Code adds a server, install the free lazaretto-guard plugin. Browse every server in the index.