Why bcrypt instead of SHA-256 or MD5 for passwords?

SHA-256 and MD5 are fast — that's the problem. An attacker can try billions of hashes per second. Bcrypt is intentionally slow (configurable via salt rounds), making brute-force attacks economically infeasible.

What salt rounds should I use for a financial application?

12 minimum. Each additional round doubles the computation time. 10 = ~100ms, 12 = ~400ms, 14 = ~1.6s. Balance security vs. login latency for your use case.

Can I verify a password without knowing the salt?

Yes — that's the beauty of bcrypt. The salt is embedded in the hash string itself ($2a$10$...). Just pass the password and the stored hash to bcrypt_verify.

Bcrypt Hash Engine MCP Connector for Claude

Hash and verify passwords with the industry-standard bcrypt algorithm. Two tools in one: hash with configurable salt rounds, and verify against stored hashes. Pure JS — zero compilation.

2 tools Official Updated Jun 28, 2026 Official Vinkius Partner

More Details Connect to Claude

An agent just generated a user registration flow. The password is stored in plaintext. That's not a bug — it's a security incident waiting to happen.

Bcrypt is the algorithm that Dropbox, GitHub, and every serious authentication system uses for password storage. It includes a built-in salt, is intentionally slow to resist brute-force, and this MCP provides it as pure JavaScript — no native compilation, no node-gyp headaches.

The Superpowers

Two Tools, One MCP: bcrypt_hash creates the hash, bcrypt_verify checks passwords against stored hashes.
Built-in Salt: Every hash includes a unique random salt — no manual salt management needed.
Configurable Cost: Salt rounds 4-16. Default 10 (~100ms). 12 for financial systems. 14+ for government.
Pure JavaScript: Uses bcryptjs — works in Edge, Lambda, Cloudflare Workers, and any Node.js runtime without compilation.