How do I add billing to my Java app?

Install the Commet SDK, add your API key, and start billing. Follow the [Java integration guide](/docs/integrate-with-java) for a step-by-step walkthrough with code examples.

Commet

Add billing with
Java

Start billing for free Read docs

Built for Java

Billing that fits your stack

Builder pattern initialization, typed response objects, and standard exception handling. Works with Spring Boot, Quarkus, Micronaut, or plain Java.

Billing.java

import co.commet.Commet;
import co.commet.Environment;
import co.commet.ApiResponse;

import java.util.Map;

Commet commet = Commet.builder()
        .apiKey(System.getenv("COMMET_API_KEY"))
        .environment(Environment.SANDBOX)
        .build();

commet.customers().create("user@example.com", "user_123");

ApiResponse subscription = commet.subscriptions().create(
        "user_123", "pro",
        null, null, null, null, null, null, null
);

Map<String, Object> data = (Map<String, Object>) subscription.getData();
String checkoutUrl = (String) data.get("checkout_url");

import co.commet.Commet;
import co.commet.Environment;
import co.commet.ApiResponse;

import java.util.Map;

Commet commet = Commet.builder()
        .apiKey(System.getenv("COMMET_API_KEY"))
        .environment(Environment.SANDBOX)
        .build();

commet.customers().create("user@example.com", "user_123");

ApiResponse subscription = commet.subscriptions().create(
        "user_123", "pro",
        null, null, null, null, null, null, null
);

Map<String, Object> data = (Map<String, Object>) subscription.getData();
String checkoutUrl = (String) data.get("checkout_url");

Get started

Install in seconds

Install the Commet Java SDK and start billing. Subscriptions, usage tracking, and checkout with Maven or Gradle.

Get started Documentation

build.gradle.kts

implementation("co.commet:commet-java:0.1.0")

implementation("co.commet:commet-java:0.1.0")

Frequently Asked Questions

Install the Commet SDK, add your API key, and start billing. Follow the Java integration guide for a step-by-step walkthrough with code examples.

Commet supports metered (pay for what you use), credits (block when exhausted), balance (spend across features), seats (per-user pricing), and boolean (feature gating). Learn more in the consumption models guide.

Yes. Call the usage tracking method whenever a billable event happens. Commet aggregates usage and bills it at the end of each billing period. Works for API calls, AI tokens, storage, or any custom metric. See the usage tracking guide for details.

Yes. Commet has a built-in AI model catalog with per-token pricing. You can track input, output, and cache tokens with configurable margins. See the AI token billing guide for setup instructions.

Yes. Commet is a Merchant of Record that handles taxes, compliance, refunds, and payouts. Stripe Tax is integrated for automatic tax calculation. Read more about the Merchant of Record model.

Commet has no setup fees and no monthly minimums. You only pay 4.5% + $0.40 per successful transaction. You can start building and testing for free using the sandbox environment. See pricing for details.

Start billing in minutes

No setup fees. No monthly minimums. 4.5% + $0.40 per successful transaction.

Start billing for free

import co.commet.Commet;

import co.commet.Environment;

import co.commet.ApiResponse;

import java.util.Map;

Commet commet = Commet.builder()

.apiKey(System.getenv("COMMET_API_KEY"))

.environment(Environment.SANDBOX)

.build();

commet.customers().create("user@example.com", "user_123");

ApiResponse subscription = commet.subscriptions().create(

"user_123", "pro",

null, null, null, null, null, null, null

);

Map<String, Object> data = (Map<String, Object>) subscription.getData();

String checkoutUrl = (String) data.get("checkout_url");

import co.commet.Commet;

import co.commet.Environment;

import co.commet.ApiResponse;

import java.util.Map;

Commet commet = Commet.builder()

.apiKey(System.getenv("COMMET_API_KEY"))

.environment(Environment.SANDBOX)

.build();

commet.customers().create("user@example.com", "user_123");

ApiResponse subscription = commet.subscriptions().create(

"user_123", "pro",

null, null, null, null, null, null, null

);

Map<String, Object> data = (Map<String, Object>) subscription.getData();

String checkoutUrl = (String) data.get("checkout_url");

Add billing withJava

Billing that fits your stack

Install in seconds

Frequently Asked Questions

Start billing in minutes

Add billing withJava

Billing that fits your stack

Install in seconds

Frequently Asked Questions

Start billing in minutes

Add billing with
Java

Add billing with
Java