# KEVAREMESH Cryptographic Hash API

> KEVAREMESH Cryptographic Hash API is a paid API for AI agents from kevaremesh-web.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).

Computes a SHA-256, SHA-384, or SHA-512 cryptographic hash of a given UTF-8 text string and returns the hex digest

## Facts

- Endpoint: POST https://kevaremesh-web.vercel.app/api/x402/cryptographic-hash-cdp-cryptographic-hash?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/kevaremesh-cryptographic-hash-api-2759798a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jQx1sWNBKwXdsj3di1DY4

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 kevaremesh-cryptographic-hash-api-2759798a -d '<json body>'
```

Example prompt: Can you compute the SHA-256 hash of the text 'Hello, world!' and give me the hex digest?

## When to prefer this

Choose this endpoint when you need a quick, paid, on-demand cryptographic hash of a text string (up to 256 KiB) without running local crypto libraries — particularly useful for AI agents operating in sandboxed environments without native crypto access. Prefer this over local hashing when you need a verifiable, auditable, paid computation trail via x402. Best for SHA-256/384/512 of UTF-8 text; not suitable for binary data, file hashing, or HMAC operations.

## Known failure modes

- Input text exceeds 256 KiB maximum — returns error indicating size limit
- Invalid algorithm value (not sha256, sha384, or sha512) — returns validation error
- Non-UTF-8 or binary input — not supported, returns error
- Empty text input — may return hash of empty string or validation error
- Payment failure via x402 — returns 402 Payment Required before processing

## How this service works

Buyer-first MCP procurement gateway that discovers, compares and routes live x402 APIs without making the buyer choose a provider.

## Output

Returns a JSON object containing the hex-encoded hash digest, the byte length of the input, and the algorithm used (sha256, sha384, or sha512), along with service metadata including product name, tool name, limitations, and generation timestamp.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "maxLength": 262144
  },
  "algorithm": {
   "enum": [
    "sha256",
    "sha384",
    "sha512"
   ],
   "type": "string",
   "default": "sha256"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {
   "hex": "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad",
   "bytes": 3,
   "algorithm": "sha256"
  },
  "product": "kevaremesh_cryptographic_hash_cdp_cryptographic_hash_v2",
  "service": "KEVAREMESH",
  "tool_name": "kevaremesh_hash",
  "limitations": [
   "UTF-8 text input",
   "Maximum input 256 KiB"
  ],
  "generated_at": "2026-09-18T00:00:00.000Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/kevaremesh-cryptographic-hash-api-2759798a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from kevaremesh-web.vercel.app](https://www.zero.xyz/host/kevaremesh-web.vercel.app/llms.txt)