Fewer subscriptions.
More vibe-coding.

Open-source tools & agent skills to build the things you’re paying for.

FOSSBilling

Project1.7K

Self-hosted billing and client management for online service businesses.

Added 2026-10-07
Replaces
GitHub

What you can build

  • Build a companion that takes manually entered invoice dates, amounts, and follow-up status, then outputs an age-ranked reminder worklist. Keep entry and sending separate from FOSSBilling.
  • Build a manual-input tool that takes invoice payment records and gateway settlement rows, matches entries by reference and amount, and outputs matched, unmatched, and conflicting rows.
  • Build a handoff generator that takes selected client details and staff communication notes, then produces a dated summary for the next person handling that client.
  • Build a report companion that takes manually entered monthly billing totals, calculates period-to-period changes, and outputs a variance summary for staff to investigate.
  • Build a translation-review companion that takes reminder text and manually pasted translations, then outputs a side-by-side review with missing or differing phrases flagged.

Try this prompt

Build a small manual-input payment settlement reconciliation companion for FOSSBilling users. Let a staff member enter invoice payment references and amounts alongside gateway settlement rows; produce matched, unmatched, and conflicting entries with reasons. Do not assume an API, file export, or gateway integration. Preserve the entered records, make the reconciliation reviewable, and never change or mark FOSSBilling invoices paid. Include setup and manual test instructions.

Get started

  1. Check system requirements

    Review the official requirements for PHP, extensions, and database needs before selecting a hosting environment: https://docs.fossbilling.org/getting-started/requirements/.

  2. Prepare hosting

    The README says FOSSBilling runs on standard LAMP/LEMP stacks. Arrange a compatible server and account for hosting costs.

  3. Follow the setup guide

    Use the official step-by-step Getting Started guide for installation: https://docs.fossbilling.org/getting-started/. A public demo is available for exploration.

License & notes

Apache-2.0The project describes itself as free and open source and is licensed under Apache-2.0. Hosting and any payment-gateway services may have separate costs; the README does not specify amounts. No model or paid AI API is documented as required. If you distribute the software or modifications, follow Apache-2.0 requirements, including providing the license and retaining applicable notices.

  • The project describes itself as beta and warns users to expect rough edges and limited support.
  • Requires a compatible PHP and database environment on a LAMP/LEMP stack; hosting and payment-gateway costs are separate.
  • The supplied README does not establish specific extension APIs, export formats, or gateway fees; verify implementation details before building integrations.

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