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Use the REST API to manage billing data, webhooks to keep your application in sync, and embedded components to give customers access to their billing information. The API uses HTTPS and JSON, with Bearer token authentication.

Make your first request

Create a sandbox API key and send your first authenticated request.

Explore the API reference

Review endpoints, request parameters, and responses, starting with customers.

Hyperline CLI

Manage customers, subscriptions, and invoices from your terminal or with an AI coding agent.

MCP server

Connect AI assistants to your Hyperline account to query billing data and perform actions.

Webhooks

React to billing events and handle delivery, retries, and signature verification.

Documentation for AI assistants

Give your AI tools access to Hyperline documentation through structured files and the documentation MCP server.

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Service endpoints

Use the base URL and API key for the same environment: test_ keys for sandbox and prod_ keys for production.

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Production environment

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Sandbox environment (test mode)

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OpenAPI specification

Download the OpenAPI specification to generate client libraries or import the API into your testing tools. For workflows you can configure in the Hyperline application, see the product documentation. If you need help with your integration, contact the team via the in-app chat.