# Hash Generator

**MCP Tool:** `hash_generator`  
**Tier:** Tier 1 — Commodity  
**Category:** generators  
**Endpoint:** https://obfus.link/mcp  
**Price:** $0.008 / call  
**Verification:** ✓ TDD verified  

> Generate MD5, SHA-256, SHA-512, BLAKE3 and more in one call

## Atomic Answer

Hash Generator computes cryptographic hashes across MD5, SHA-1, SHA-256, SHA-384, SHA-512, SHA-3-256, SHA-3-512, BLAKE2b, and BLAKE3 from a single input simultaneously. Verify mode auto-detects the algorithm from hash length and confirms whether the input matches a known reference hash, with hex or base64 output encoding.

## Description

Generates cryptographic hashes across MD5, SHA-1, SHA-256, SHA-384, SHA-512, SHA-3-256, SHA-3-512, BLAKE2b, and BLAKE3 from a single input simultaneously. Verify mode auto-detects the algorithm from hash length and confirms whether the input matches.

## Agentic Reasoning

USE THIS WHEN: (1) You need to hash content for integrity checking, deduplication, or cache keys and want output across multiple algorithms in a single call. (2) You have a known hash and content and need to verify that the content matches without knowing which algorithm was used — auto-detection from hash length identifies MD5 (32 hex), SHA-256 (64 hex), SHA-512 (128 hex), and BLAKE2b/3 variants. DO NOT USE WHEN: you need a keyed message authentication code — use hmac_gen instead. Do not use for password hashing — use bcrypt, scrypt, or argon2 (this tool produces fast hashes that are unsuitable for password storage). OVER ALTERNATIVES: prefer over crypto.createHash (one algorithm at a time, no verify mode with auto-detection) and online hash tools (no MCP API, no batch algorithm output).

## MCP Description

Generates and verifies cryptographic hashes. USE WHEN: hashing content for integrity checking, cache keys, or deduplication, or verifying that an input matches a reference hash without knowing which algorithm was used. INPUT: input string, mode, optional algorithms array, optional verify fields. OUTPUT: per-algorithm hashes (generate mode) or match result with detected algorithm (verify mode). COST: 1 unit.

## Input Schema

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `mode` | `generate` \| `verify` | yes |  |
| `input` | `string` | yes |  |
| `encoding` | `hex` \| `base64` | no |  |
| `algorithms` | `array` | no |  |
| `verifyHash` | `string` | no |  |
| `verifyAlgorithm` | `string` | no |  |

## Output Schema

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `meta` | `object` | no |  |
| `hashes` | `object` | no |  |
| `verified` | `object` | no |  |

## How To Use

1. **Choose mode** — generate produces hashes for all algorithms. verify confirms a match against a known hash.
2. **Enter input** — Drop in the text or data to hash (or to verify against the reference hash).
3. **Select encoding** — hex (default) for most contexts, base64 for shorter output (URL-safe variant available).
4. **Generate or verify** — Generate returns all algorithms simultaneously. Verify returns match status and detected algorithm.

## FAQs

**Which algorithm should I use?**

For new applications: SHA-256 or BLAKE3 — both are fast and cryptographically secure. For compatibility with legacy systems: SHA-1 or MD5 (both are broken for security but fine for non-cryptographic purposes like cache keys). For maximum security against future attacks: SHA-512 or SHA-3-512.

**Is this safe for password hashing?**

No. MD5, SHA, and BLAKE are designed to be fast — exactly the opposite of what password hashing needs. Use bcrypt, scrypt, or argon2 for passwords. This tool is for content integrity, deduplication, and cache keys.

**How does auto-detection work in verify mode?**

The tool inspects the hash length and character set: 32 hex chars → MD5, 40 hex → SHA-1, 64 hex → SHA-256, 96 hex → SHA-384, 128 hex → SHA-512. Base64-encoded hashes are detected similarly by decoded byte length. If the algorithm is ambiguous (rare), provide verifyAlgorithm explicitly.

**Can I use this tool via the MCP API?**

Yes. The tool is registered on the obfus.link MCP server at https://obfus.link/mcp. Call it from any MCP-compatible agent with a Shared Payment Token. The MCP tool name matches the snake_case slug shown in the integration snippet.

## Tags

`hash` · `md5` · `sha256` · `sha512` · `blake3` · `checksum` · `crypto`

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*obfus.link — A Subether Labs Infrastructure Project*  
*Canonical URL: https://obfus.link/tool/hash-generator*  
*JSON view: https://obfus.link/tool/hash-generator/json*