UUID Generator API

GET

Create RFC-compliant version 4 UUIDs formatted for your stack.

UUID Generator produces random RFC 4122 version 4 UUIDs on demand. Request single IDs or batches in standard lowercase, uppercase, or strings without hyphens.

Try it — live request, no key required

Request

GETapi.apiverve.com/v1/uuidgenerator

Verification

Format

No key required to try it. Get a key to use it in your app.

Example

{
  "status": "ok",
  "error": null,
  "data": {
    "uuids": [
      "fd874c4e-4fc2-4a65-ab1e-46c7a141c3c3",
      "59f31559-dd12-46ff-a3d1-d7bd5eddb09b",
      "f09b5f16-1b68-4082-acbc-38ce08de2fe4",
      "c8c1b3d8-e927-43a7-840c-ced3964ca95f",
      "aa3cb61e-096f-46fa-a12c-5f2b696186fb"
    ],
    "count": 5,
    "version": 4,
    "format": "default",
    "variant": "RFC 4122"
  }
}

About the UUID Generator API

UUID Generator works by creating random 128-bit identifiers following the RFC 4122 UUID version 4 specification. Provides multiple output formats to meet different platform and application requirements.

What people use it for

API Development: Generate unique identifiers for API resources, requests, and responses
Distributed Systems: Create globally unique identifiers across microservices and distributed applications
Data Import: Generate unique identifiers during data migration and import operations
Testing: Create unique test data identifiers for automated testing and QA processes

Ways to call it

One endpoint, many ways in — REST with JSON, XML, YAML and CSV, plus GraphQL and an MCP interface for AI agents.

JSON: Default REST response
XML: Markup format
YAML: Human-readable
CSV: Tabular export
GraphQL: Query language
MCP: For AI agents

View all integrations →

Other ways to use UUID Generator

Same data, same APIVerve account, same credit balance — one key works on all of them.

Give it to an AI agentConnect over MCP and your agent calls it as a native tool — Claude, Cursor, ChatGPT.on VerveKit Google Sheets or ExcelA =VERVE() formula fills a column — no script, no export, recalculates in place.on VerveSheets

Questions.

Common questions about the UUID Generator API.

Read the docs →

How many UUID requests does the Free plan cover?

The Free plan includes 100 requests each month at 2 credits per call. If you need higher volume, the Starter plan covers up to 100,000 calls per month, which works out to about $0.30 per 1,000 calls.

Is the UUID variant specification included on the Free plan?

No, the variant field is a premium attribute. Upgrading to any paid plan unlocks the variant specification alongside the generated UUIDs, count, version, and formatting details.

Which UUID versions can I generate?

The generator produces RFC 4122 version 4 identifiers. Each identifier is generated as a random 128-bit value adhering strictly to the version 4 specification.

Can I generate multiple UUIDs in a single call?

Yes, you can specify how many UUIDs you need using the count parameter. The response returns an array containing the full batch of generated identifiers in your chosen format.

Can I request UUID versions other than version 4?

No, version 4 is currently the only supported specification. Specifying other UUID versions like version 1 or version 5 is not supported.

Request parameters — GET /v1/uuidgenerator

Sent in the query string. Premium parameters are accepted on every plan but only take effect on plans that include them. Anything not listed here is dropped rather than passed through.

Optional

Parameter	Type	Example	Description
`count`Optional	integer	`5`	Number of UUIDs to generate default 1 · range 1-100
`version`Optional	integer	`4`	UUID version (only version 4 currently supported) `4` default 4
`format`Optional	string	`default`	Output format `defaultuppercasenohyphens` default default

Example request

1
2

curl "https://api.apiverve.com/v1/uuidgenerator?count=5&version=4&format=default" \
  -H "x-api-key: YOUR_API_KEY"

Authentication

Send your key in the x-api-key header. That is the only auth step — no token exchange, and no per-endpoint scope to configure.

Header	When	Value
`x-api-key`Required	Every request	Your API key. Header names are case-insensitive, so `X-API-Key` is the same header.
`Authorization`Alternate	Instead of the above	`Bearer <key>` — for clients that only expose bearer auth. Resolves to the same account and the same billing.

401 is the only auth verdict

A 401 means the key is missing, invalid or expired. A 403 means the key is valid but not permitted here — blocked by a key restriction or an IP allow-list. Running out of credits is a 429.

Response — GET /v1/uuidgenerator

Every APIVerve endpoint returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape.

Sample response

{
  "status": "ok",
  "error": null,
  "data": {
    "uuids": [
      "fd874c4e-4fc2-4a65-ab1e-46c7a141c3c3",
      "59f31559-dd12-46ff-a3d1-d7bd5eddb09b",
      "f09b5f16-1b68-4082-acbc-38ce08de2fe4",
      "c8c1b3d8-e927-43a7-840c-ced3964ca95f",
      "aa3cb61e-096f-46fa-a12c-5f2b696186fb"
    ],
    "count": 5,
    "version": 4,
    "format": "default",
    "variant": "RFC 4122"
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Field	Type	Example	Description
`uuids`	array	`[fd874c4e-4fc2-4a65-ab1e-46c7a141c3c3, ...]`	Array of generated UUID strings in requested format
`count`	number	`5`	Number of UUIDs generated in this request
`version`	number	`4`	UUID version specification used (RFC 4122 v4)
`format`	string	`"default"`	Output format applied to generated UUIDs
`variant`Premium	string	`"RFC 4122"`	UUID variant specification identifier

Response headers

Every response carries your balance, so your own code always knows where it stands without polling anything. All four are exposed to browsers through CORS.

Header	What it carries
`x-api-remaining-credits`	Credits left in the current cycle
`x-api-credits-used`	Credits spent in the current cycle
`x-api-max-credits`	The allowance for the cycle
`x-api-version`	Version of the endpoint that answered

Errors

Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change.

Status	Meaning	What to do
`400`	Input was rejected	Read `error`; it names the parameter that has to change.
`401`	Key missing or invalid	Check the header name and the key value.
`403`	Key valid, but not permitted here	A key restriction or an IP allow-list — never a bad key.
`429`	Rate limited, or out of credits	Read `error` to tell them apart, then back off or top up.

What a call costs — 2 credits per call

Credits are shared across every APIVerve API — one balance, one key, one bill. Failed requests never count against it, so a rejected input costs nothing.

Plan	Per month	Credits	UUID Generator calls	Per 1,000 calls
Free	Free	200	100	Free
Starter	$29.99	200,000	100,000	$0.30
Pro	$99.99	1,000,000	500,000	$0.20
Mega	$299.99	4,000,000	2,000,000	$0.15

Calls are what the credits buy at this API's rate — spend them here, on any of the other APIs, or across both. Nothing is reserved per endpoint.

Compare all pricing tiers →

Call it from cURL — GET /v1/uuidgenerator

No SDK to install — this is a plain HTTPS call to /v1/uuidgenerator with your key in the x-api-key header. Swap in a real key and it runs as-is.

cURL

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2

curl "https://api.apiverve.com/v1/uuidgenerator" \
  -H "x-api-key: YOUR_API_KEY"

Resources

GitHubapiverve/uuidgenerator-apiSource, issues and the examples this page is built from.ReferenceUUID Generator API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

@apiverve/uuidgeneratornpm APIVerve.API.UUIDGeneratorNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Node.js — GET /v1/uuidgenerator

Install the Node.js SDK, then call the UUID Generator API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.

Install — npm

npm install @apiverve/uuidgenerator

Node.js

const res = await fetch("https://api.apiverve.com/v1/uuidgenerator", {
  headers: { "x-api-key": "YOUR_API_KEY" },
});
const { data } = await res.json();
console.log(data);

Resources

npm@apiverve/uuidgeneratorThe published Node.js client, versioned and signed.GitHubapiverve/uuidgenerator-apiSource, issues and the examples this page is built from.ReferenceUUID Generator API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

APIVerve.API.UUIDGeneratorNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Python — GET /v1/uuidgenerator

No SDK to install — this is a plain HTTPS call to /v1/uuidgenerator with your key in the x-api-key header. Swap in a real key and it runs as-is.

Python

import requests

res = requests.get(
    "https://api.apiverve.com/v1/uuidgenerator",
    headers={"x-api-key": "YOUR_API_KEY"},
)
print(res.json()["data"])

Resources

Also published for

@apiverve/uuidgeneratornpm APIVerve.API.UUIDGeneratorNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from C# / .NET — GET /v1/uuidgenerator

Install the C# / .NET SDK, then call the UUID Generator API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.

Install — NuGet

dotnet add package APIVerve.API.UUIDGenerator

C# / .NET

using var client = new HttpClient();
client.DefaultRequestHeaders.Add("x-api-key", "YOUR_API_KEY");

var json = await client.GetStringAsync("https://api.apiverve.com/v1/uuidgenerator");
Console.WriteLine(json);

Resources

NuGetAPIVerve.API.UUIDGeneratorThe published C# / .NET client, versioned and signed.GitHubapiverve/uuidgenerator-apiSource, issues and the examples this page is built from.ReferenceUUID Generator API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

@apiverve/uuidgeneratornpm

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Go — GET /v1/uuidgenerator

No SDK to install — this is a plain HTTPS call to /v1/uuidgenerator with your key in the x-api-key header. Swap in a real key and it runs as-is.

req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/uuidgenerator", nil)
req.Header.Set("x-api-key", "YOUR_API_KEY")

res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))

Resources

Also published for

@apiverve/uuidgeneratornpm APIVerve.API.UUIDGeneratorNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from PHP — GET /v1/uuidgenerator

No SDK to install — this is a plain HTTPS call to /v1/uuidgenerator with your key in the x-api-key header. Swap in a real key and it runs as-is.

PHP

$ch = curl_init("https://api.apiverve.com/v1/uuidgenerator");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-api-key: YOUR_API_KEY"]);

$response = curl_exec($ch);
echo $response;

Resources

Also published for

@apiverve/uuidgeneratornpm APIVerve.API.UUIDGeneratorNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Ruby — GET /v1/uuidgenerator

No SDK to install — this is a plain HTTPS call to /v1/uuidgenerator with your key in the x-api-key header. Swap in a real key and it runs as-is.

Ruby

require "net/http"

uri = URI("https://api.apiverve.com/v1/uuidgenerator")
req = Net::HTTP::Get.new(uri)
req["x-api-key"] = "YOUR_API_KEY"

res = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |h| h.request(req) }
puts res.body

Resources

Also published for

@apiverve/uuidgeneratornpm APIVerve.API.UUIDGeneratorNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

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UUID Generator API

Try it — live request, no key required

About the UUID Generator API

What people use it for

Ways to call it

Other ways to use UUID Generator

Questions.

Request parameters — GET /v1/uuidgenerator

Optional

Authentication

Response — GET /v1/uuidgenerator

Response fields

Response headers

Errors

What a call costs — 2 credits per call

Call it from cURL — GET /v1/uuidgenerator

Resources

Also published for

Call it from Node.js — GET /v1/uuidgenerator

Resources

Also published for

Call it from Python — GET /v1/uuidgenerator

Resources

Also published for

Call it from C# / .NET — GET /v1/uuidgenerator

Resources

Also published for

Call it from Go — GET /v1/uuidgenerator

Resources

Also published for

Call it from PHP — GET /v1/uuidgenerator

Resources

Also published for

Call it from Ruby — GET /v1/uuidgenerator

Resources

Also published for

Zero-code embed — one snippet, no backend

Changelog — UUID Generator API

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