FOR DEVELOPERS

Root on the thing that bills your customers.

No SDK sandbox, no partner API tier, no rate-limited window into your own billing. You get the source, the database, and the deploy key. Here's what's in the box.

The source, not a slideshow of it.

# your instance, your repo
opensubs/
├─ apps/
│  ├─ billing-engine/  # contracts, renewals, proration
│  ├─ customer-portal/ # skip / swap / pause / gift
│  └─ analytics/       # MRR, churn, cohorts
├─ packages/
│  ├─ dunning/         # retries per decline code
│  └─ bundles/         # build-a-box, swaps
├─ scripts/            # the library, see below
└─ docs/               # runbooks + checklists

The script library.

Copy, run, keep — guarantee or not. Each ships with a runbook in docs/.

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…plus the community drop: members ship new scripts weekly.

Everything fires an event. English ships the rest.

Webhooks & API

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REST + webhooks on your own domain. No partner tier, no rate ceiling you don't set yourself.

The AI engineer

"Add a 10% loyalty discount to any renewal after the 6th."

→ branch: loyalty-discount-6th
→ 2 files changed, 14 tests added
→ PR open. Review the diff, then ship.

Every change lands as a reviewable PR on your instance. English in, diff out — you keep the merge button.

GET THE DEPLOY KEY.

$9,999 a year, flat. 60-day keep-everything guarantee.

Become an insider