# Delx SHA256 Hex

> Delx SHA256 Hex is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Computes the SHA-256 hex digest of an input text string, locally and without retention, for use as a content fingerprint or cache key.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/sha256-hex
- 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/delx-sha256-hex-897c948a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QMQez6nVF0sRNE6veU8Zq

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 delx-sha256-hex-897c948a -d '<json body>'
```

Example prompt: Give me the SHA-256 hex digest of the text 'Hello, world!' so I can use it as a cache key.

## When to prefer this

Choose this endpoint when you need a fast, cheap, local SHA-256 hex digest with no data retention and no external dependencies — ideal for generating deterministic cache keys, deduplication fingerprints, or content checksums inside an agent pipeline. Prefer it over general-purpose crypto libraries when you want a hosted, pay-per-call micro-utility that integrates with the x402 payment protocol on Base.

## Known failure modes

- Empty or missing 'text' field returns an error response
- Extremely large text inputs may be rejected or time out
- Payment failure via x402 protocol prevents the call from completing
- Malformed JSON request body results in a 400-level error

## How this service works

SHA-256 hex digest of text. Call when you need content fingerprints for agent cache keys. Returns hex digest for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

## Output

A JSON object containing the SHA-256 hex digest string of the provided input text. The digest is a 64-character lowercase hexadecimal string computed locally without any external network calls or data retention.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "description": "Input field: text."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "hex": "1d6334fef87552e1f9ad7e36ae551606a62973215dcb6f9bcb2e580852febc3c",
  "schema": "delx/util-sha256-hex/v1",
  "algorithm": "sha256"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-sha256-hex-897c948a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)