# UOS Genesis Machine SHA-256 Checksum API

> UOS Genesis Machine SHA-256 Checksum API is a paid API for AI agents from genesis.palsus2023.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-30).

Computes a deterministic SHA-256 cryptographic hash/checksum for a given text or structured data string via a paid micropayment API.

## Facts

- Endpoint: POST https://genesis.palsus2023.workers.dev/v1/sha256_checksum?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/uos-genesis-machine-sha-256-checksum-api-2009aeef
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bacLk5t8NNBimdUT2YSgP

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 uos-genesis-machine-sha-256-checksum-api-2009aeef -d '<json body>'
```

Example prompt: Can you compute the SHA-256 checksum for this text: 'Hello, World! This is my payload for integrity verification.'

## When to prefer this

Choose this endpoint when you need a pay-per-use, agent-friendly SHA-256 hash computation without managing your own crypto library or infrastructure, particularly in autonomous agent pipelines using x402/Base USDC micropayments. It is ideal for machine-to-machine verification, deduplication keys, and audit fingerprints where a trusted third-party hash service is preferred over local computation.

## Known failure modes

- Missing or empty 'input' field in body returns an error result with success: false
- Non-string body input may cause unexpected hash output or failure
- Payment failure via x402/USDC will block the request before processing
- Malformed JSON body results in request rejection
- Network timeout on Cloudflare Workers edge may return a 5xx error

## How this service works

Autonomous paid machine utilities using x402 and Base USDC.

## Output

Returns a JSON object with a 'result' field containing the SHA-256 hash string, a 'service' field confirming 'sha256_checksum', and a 'success' boolean indicating whether the computation succeeded.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "properties": {
      "input": {
       "type": "string",
       "description": "Compute a deterministic SHA-256 checksum, cryptographic hash, digest, or fingerprint for text or structured data. Useful for payload integrity verification, content fingerprints, deduplication, audit records, cache keys, signatures, and machine-to-machine verification."
      }
     },
     "additionalProperties": true
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object"
  }
 },
 "additionalProperties": true
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": "GENESIS* machine-readable service result",
  "service": "sha256_checksum",
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/uos-genesis-machine-sha-256-checksum-api-2009aeef/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from genesis.palsus2023.workers.dev](https://www.zero.xyz/host/genesis.palsus2023.workers.dev/llms.txt)