# SiteCheck Hash Generator

> SiteCheck Hash Generator is a paid API for AI agents from api.sitecheck-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-11-05).

Computes multiple cryptographic hashes (MD5, SHA-1, SHA-256, SHA-384, SHA-512, CRC-32, HMAC-SHA256, HMAC-SHA512) for a given text or base64-encoded input in a single call

## Facts

- Endpoint: POST https://api.sitecheck-api.workers.dev/api/hash?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-05
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitecheck-hash-generator-0d45ef18
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ibmY5bpH-L8ZbOxiMaosc

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability sitecheck-hash-generator-0d45ef18 -d '<json body>'
```

Example prompt: Can you compute the SHA-256 and MD5 hashes of the text 'hello world' for me?

## When to prefer this

Choose this endpoint when you need multiple hash algorithms computed in a single API call without running local crypto libraries, when you need HMAC signatures without managing crypto dependencies, when working in environments where WebCrypto is unavailable, or when you want MD5/CRC-32 alongside SHA-family hashes in one unified response. Prefer alternatives if you only need a single standard hash and have access to native crypto libraries.

## Known failure modes

- Missing or empty 'input' field returns an error
- HMAC algorithms requested without providing a 'key' field fail
- Invalid algorithm name in 'algorithms' list causes rejection
- Input exceeding expected size limits may be rejected
- Base64 encoding specified but input is not valid base64

## How this service works

Hashes of a text or base64 input (up to 1 MB): MD5, SHA-1, SHA-256, SHA-384, SHA-512 and CRC-32, and HMAC-SHA-256 or HMAC-SHA-512 when a key is given. Hex and base64 output. MD5 and CRC-32 are implemented here and checked against RFC 1321 and the standard CRC test vector. Body { input, encoding, algorithms, key }. Pure code and WebCrypto, no outside request.

## Output

Returns a JSON object containing the byte length of the input, the hash results for each requested algorithm (each with both hex and base64 representations), a source note describing the computation backend (WebCrypto, MD5, CRC-32), and a checkedAt ISO timestamp.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "key": {
   "type": "string",
   "description": "Key for the HMAC algorithms, up to 1024 characters (JSON body field)"
  },
  "input": {
   "type": "string",
   "description": "The text, or base64 when encoding is base64 (JSON body field)"
  },
  "encoding": {
   "type": "string",
   "description": "text (default) or base64"
  },
  "algorithms": {
   "type": "string",
   "description": "Comma-separated: md5, sha1, sha256, sha384, sha512, crc32, hmac-sha256, hmac-sha512 (default: all but the HMACs)"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "bytes": 3,
  "source": "Computed here: WebCrypto (SHA-1/2, HMAC), MD5 (RFC 1321) and CRC-32 (ISO 3309) in code",
  "results": {
   "md5": {
    "hex": "900150983cd24fb0d6963f7d28e17f72",
    "base64": "kAFQmDzST7DWlj99KOF/cg=="
   },
   "crc32": {
    "hex": "352441c2",
    "base64": "NSRBwg=="
   },
   "sha256": {
    "hex": "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad",
    "base64": "ungWv48Bz+pBQUDeXa4iI7ADYaOWF3qctBD/YfIAFa0="
   }
  },
  "checkedAt": "2026-10-15T14:07:52.198Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sitecheck-hash-generator-0d45ef18/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.sitecheck-api.workers.dev](https://www.zero.xyz/host/api.sitecheck-api.workers.dev/llms.txt)