# BLAKE2b-512 Hash Digest

> BLAKE2b-512 Hash Digest is a paid API for AI agents from twin.unykorn.org, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-29).

Computes the BLAKE2b-512 cryptographic hash digest of a given text string or raw hex-encoded bytes

## Facts

- Endpoint: POST https://twin.unykorn.org/hash-blake2b512?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blake2b-512-hash-digest-17dffdc7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zD0GQH0KWo2Y_CP66266N

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 blake2b-512-hash-digest-17dffdc7 -d '<json body>'
```

Example prompt: Can you compute the BLAKE2b-512 hash of the text 'Hello, world!'?

## When to prefer this

Choose this endpoint when you need a BLAKE2b-512 (512-bit) digest specifically, as opposed to SHA-256 or shorter BLAKE variants. It is ideal for blockchain-adjacent workflows, data integrity verification, or any scenario requiring a high-security, fast, collision-resistant hash without a secret key. Prefer this over SHA-3 or MD5 when speed and security are both priorities. Use the hex input parameter when your data is already binary/byte-encoded rather than UTF-8 text.

## Known failure modes

- Input text exceeds 49152 character limit — request rejected
- Hex input does not match pattern ^0x[0-9a-fA-F]*$ — validation error
- Neither 'text' nor 'hex' param provided — ambiguous or empty input
- Payment processing failure — x402 transaction not confirmed
- Network timeout or provider unavailability returns non-200 response

## How this service works

BLAKE2b-512 digest of text or raw bytes — Genesis402 / UnyKorn Operator Network

## Output

Returns a JSON object with a boolean 'ok' field, the hash type identifier ('hash-blake2b512'), the BLAKE2b-512 digest of the input, a payment receipt containing a transaction hash, USD amount charged, and a unique receipt ID, plus an ISO 8601 timestamp of when the digest was generated.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "params": {
   "type": "object",
   "properties": {
    "hex": {
     "type": "string",
     "pattern": "^0x[0-9a-fA-F]*$"
    },
    "text": {
     "type": "string",
     "maxLength": 49152
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "type": "hash-blake2b512",
  "receipt": {
   "tx_hash": "0x<64hex>",
   "amount_usd": 0.25,
   "receipt_id": "g402-<16hex>"
  },
  "generated_at": "<iso8601>"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blake2b-512-hash-digest-17dffdc7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from twin.unykorn.org](https://www.zero.xyz/host/twin.unykorn.org/llms.txt)