# PennyRail SHA-512 Multi-Hash

> PennyRail SHA-512 Multi-Hash is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Computes SHA-512 cryptographic hashes over one or more input values in a single call

## Facts

- Endpoint: POST https://pennyrail.vercel.app/api/p/nano/crypto.hash-multi--sha512
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/pennyrail-sha-512-multi-hash-f5fdbc9c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nddKbq-LSIyvYSmkO9pAU

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 pennyrail-sha-512-multi-hash-f5fdbc9c -d '<json body>'
```

Example prompt: Can you compute the SHA-512 hash of this data object for me: {"userId": "abc123", "email": "user@example.com", "timestamp": 1718000000}?

## When to prefer this

Choose this endpoint when you need to compute SHA-512 hashes over structured input objects in a pay-per-call, agent-friendly microservice context — especially when building pipelines that require cryptographic fingerprinting, integrity verification, or pre-signing data without managing your own hash infrastructure. It is well-suited for agents that need deterministic, tamper-evident digests without embedding cryptographic libraries directly.

## Known failure modes

- Missing required 'input' field returns a validation error
- Malformed JSON body causes a 400-level parse error
- Input too large may cause a timeout or payload rejection
- Insufficient USDC balance or failed x402 payment results in 402 Payment Required response
- Unexpected server errors return a 500-level response with no hash result

## How this service works

Machine-readable settlement service

## Output

Returns a JSON object containing the SHA-512 hash digest(s) of the provided input. The response is an open-schema object that includes the computed hash value(s) corresponding to the submitted input data.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "additionalProperties": true
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/pennyrail-sha-512-multi-hash-f5fdbc9c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from pennyrail.vercel.app](https://www.zero.xyz/host/pennyrail.vercel.app/llms.txt)