# OpenVerbs ULID Generator

> OpenVerbs ULID Generator is a paid API for AI agents from id.openverbs.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Generates one or more lexicographically sortable ULIDs (Universally Unique Lexicographically Sortable Identifiers), optionally seeded with a specific timestamp, with monotonic ordering guaranteed within a single call.

## Facts

- Endpoint: POST https://id.openverbs.com/v1/ulid
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/openverbs-ulid-generator-86aefed3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zO1mt3vOa2ZBLzTzrVnBv

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 openverbs-ulid-generator-86aefed3 -d '<json body>'
```

Example prompt: Generate 5 ULIDs for me right now so I can use them as primary keys for my new database records.

## When to prefer this

Choose this endpoint when you need lexicographically sortable, time-ordered unique identifiers rather than random UUIDs. Prefer ULIDs over UUIDs when your use case requires natural chronological sorting without a separate timestamp column, or when you need guaranteed monotonic ordering within a batch. Use the optional timestamp seeding when backfilling historical records.

## Known failure modes

- count exceeds maximum of 1000 — returns validation error
- time value exceeds 48-bit maximum (281474976710655) — returns validation error
- invalid body type — returns 400 bad request
- payment not attached or insufficient — returns 402 Payment Required

## How this service works

Generate one or more lexicographically sortable ULIDs (monotonic within a call).

## Output

Returns an array of one or more ULID strings (26-character Base32 encoded, 128-bit identifiers). Each ULID encodes a 48-bit millisecond timestamp and 80 bits of randomness, and ULIDs within the same call are monotonically increasing even if generated within the same millisecond.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "properties": {
      "time": {
       "type": "integer",
       "maximum": 281474976710655,
       "minimum": 0,
       "description": "Optional Unix ms timestamp to seed the time component. Defaults to now."
      },
      "count": {
       "type": "integer",
       "maximum": 1000,
       "minimum": 1,
       "description": "How many ULIDs to generate. Defaults to 1."
      }
     },
     "additionalProperties": false
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/openverbs-ulid-generator-86aefed3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from id.openverbs.com](https://www.zero.xyz/host/id.openverbs.com/llms.txt)