Corebill

Introduction to Corebill

Corebill is a minimalist invoicing and quoting platform designed specifically for developers, freelancers, and digital agencies. It integrates an AI agent at its core to streamline financial operations through natural language interaction, eliminating the need for traditional form-based workflows. The platform emphasizes simplicity, developer control, and automation—providing a clean, API-first experience with public REST endpoints, comprehensive documentation, and a UI that prioritizes functionality over visual clutter.

Corebill supports end-to-end billing workflows including quote creation and versioning, invoice generation and management, client onboarding, project tracking, and payment handling. It includes built-in features such as client portals, activity logs, custom fields, segmentation, and wallet balances—all accessible via both the interface and programmatic integration.

Key Takeaways

• Natural language AI agent for creating invoices, quotes, and managing clients without navigating menus or forms
• Versioned quoting system with public approval links and seamless conversion to invoices
• Full-featured invoicing with partial payments, subscriptions, automated reminders, and credit notes
• Integrated project management with task tracking, time logging, and direct billing of hours to invoices
• Customer 360 view including contacts, files, activity history, tags, custom fields, and wallet balance
• Developer-first architecture with REST API, API keys, granular permissions, webhooks, and rate limiting
• Public API documentation and TypeScript-ready integrations (e.g., Next.js, Supabase, Vercel)

How Corebill Works

Users interact with Corebill primarily through its AI agent by typing plain-language commands—such as "Send invoice #42 to Acme" or "Create a client called Stripe"—to trigger actions across quoting, invoicing, client management, and reporting. The system interprets intent and executes corresponding operations in real time, returning immediate feedback and structured outputs.

Behind the interface, Corebill exposes a fully documented REST API with standard HTTP methods and authentication via bearer tokens. Developers can programmatically create customers, generate quotes and invoices, retrieve payment statuses, and subscribe to events using webhooks. All resources follow consistent naming conventions (e.g., /v1/customers, /v1/invoices) and return predictable JSON responses with timestamps, identifiers, and status fields.

The platform also supports collaborative workflows through shared client portals, version-controlled quotes, and role-based access—enabling teams to coordinate billing activities without switching tools or exporting data manually.

Core Benefits and Applications

Corebill enables development teams and agencies to reduce administrative overhead in client-facing financial operations. For example, agencies can draft and iterate on quotes with version history, share approval links with clients, and convert accepted proposals into invoices with one command. Freelancers benefit from automated payment reminders, partial payment tracking, and consolidated client records—including contact details, past interactions, and outstanding balances.

Its API-native design supports integration into existing tech stacks: time-tracking tools can push logged hours directly to invoices; CI/CD pipelines can trigger invoice generation upon deployment; and CRM systems can synchronize contact and project data bidirectionally. The platform’s support for multiple currencies, country-specific tax handling, and wallet-based client balances makes it suitable for globally distributed teams serving international clients.