# Syntexa AgentShelf UUID Generator

> Syntexa AgentShelf UUID Generator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-18).

Generates one or more UUID values (v4 random or v7 time-ordered) using local cryptographic primitives with no external network calls.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/uuid?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/syntexa-agentshelf-uuid-generator-c6a5a7d8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SRUt5ZCOqw0uF2zKIphUL

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 syntexa-agentshelf-uuid-generator-c6a5a7d8 -d '<json body>'
```

Example prompt: Generate 5 random v4 UUIDs for me — I need them to use as unique keys for new database records.

## When to prefer this

Choose this endpoint when an agent needs cryptographically strong UUID generation with no external dependencies or latency from third-party services. Prefer the v7 option when time-ordering of UUIDs matters (e.g. event logs, database keys that benefit from sequential ordering). Prefer v4 for pure randomness. Use the sandbox endpoint (/v1/sandbox/uuid) for free testing before committing to paid calls.

## Known failure modes

- count out of range (must be 1-50) returns a validation error
- invalid version value (not v4 or v7) returns a bad request error
- missing or malformed JSON body returns a parse error
- payment not included or insufficient (requires $0.001 USDC on Base) returns 402 Payment Required

## How this service works

Call when an agent needs one or more UUID values. version defaults to v4 from crypto; v7 is time-ordered. count is 1 to 50. Local only. No network. Send JSON {"version":"v4","count":1}. Exact $0.001 USDC on Base. Try unpaid POST /v1/sandbox/uuid first.

## Output

Returns a JSON array containing the requested number of UUID strings (1 to 50), generated locally using Node.js crypto with no external network calls. v4 UUIDs are randomly generated; v7 UUIDs are time-ordered and monotonically sortable.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "count": {
   "type": "integer",
   "maximum": 50,
   "minimum": 1,
   "examples": [
    1
   ],
   "description": "How many UUIDs to return. Example: 1. Default is 1. Maximum is 50."
  },
  "version": {
   "enum": [
    "v4",
    "v7"
   ],
   "type": "string",
   "examples": [
    "v4"
   ],
   "description": "UUID version. v4 is random (default). v7 is time-ordered. Example: v4."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/syntexa-agentshelf-uuid-generator-c6a5a7d8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentshelf.syntexa.ch](https://www.zero.xyz/host/agentshelf.syntexa.ch/llms.txt)