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UUID Generator HTTP API

Welcome to the UUID.ca Developer HTTP API. Our API runs on Cloudflare's global edge network, providing sub-millisecond UUID and GUID generation with zero authentication, no rate limits for standard workloads, and full CORS support.

Quick Start (cURL)

Generate a single random UUID v4 in plain text:

curl https://uuid.ca/api/v4

Output:

9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d

Supported Endpoints

Endpoint Method Description
/api/v4 or /api/ GET Version 4 (Random, RFC 4122)
/api/v7 GET Version 7 (Unix ms time-ordered, RFC 9562)
/api/v1 GET Version 1 (Timestamp & MAC/Node)
/api/v6 GET Version 6 (Reordered time-based)
/api/nil GET Nil UUID (00000000-0000-0000-0000-000000000000)

Query Parameters

Parameter Values Default Description
count 1 to 100 1 Number of UUIDs to generate in a single batch.
format text | json text Response format (or pass Accept: application/json header).
case lower | upper lower Convert hexadecimal letters to UPPERCASE.
hyphens true | false true Set to false to strip dashes (32 hex characters).
braces true | false false Set to true to wrap each GUID in curly braces { }.

Usage Examples

1. Time-Ordered UUID v7 (RFC 9562)

curl https://uuid.ca/api/v7

2. Bulk Generation (JSON Response)

curl "https://uuid.ca/api/v7?count=3&format=json"

Output:

{
  "version": "v7",
  "count": 3,
  "uuids": [
    "019313ea-5470-7164-883a-4467008daae6",
    "019313ea-5470-7164-883a-4467008daae7",
    "019313ea-5470-7164-883a-4467008daae8"
  ]
}

3. Microsoft / .NET GUID Format

curl "https://uuid.ca/api/v4?case=upper&braces=true"

Output:

{4FE5A660-59B1-4A59-99E7-29BE7D6DEB39}

4. Bash One-Liner for Environment Variables

export DEPLOYMENT_ID=$(curl -s https://uuid.ca/api/v4)
echo "Deploying with ID: $DEPLOYMENT_ID"

5. Path Syntax for Bulk Requests

# Generate 5 UUID v4s
curl https://uuid.ca/api/v4/5