Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add fanfan-de/anybox --skill stripe-best-practicesgit clone --depth 1 https://github.com/fanfan-de/anyboxWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/fanfan-de/anybox/stripe-best-practices)<a href="https://agentmods.dev/skills/fanfan-de/anybox/stripe-best-practices"><img src="https://agentmods.dev/badge/skills/fanfan-de/anybox/stripe-best-practices/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/fanfan-de/anybox/stripe-best-practices"><img src="https://agentmods.dev/badge/skills/fanfan-de/anybox/stripe-best-practices.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00090 | $0.00407 |
| Opus 5 | $0.00045 | $0.00204 |
| Sonnet 5 | $0.00018 | $0.00081 |
| Haiku 4.5 | $0.00009 | $0.00041 |
Grade A, and why
stripe-best-practices scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Latest Stripe API version: 2026-02-25.clover. Always use the latest API version and SDK unless the user specifies otherwise.
Integration routing
| Building... | Recommended API | Details |
|---|---|---|
| One-time payments | Checkout Sessions | references/payments.md |
| Custom payment form with embedded UI | Checkout Sessions + Payment Element | references/payments.md |
| Saving a payment method for later | Setup Intents | references/payments.md |
| Connect platform or marketplace | Accounts v2 (/v2/core/accounts) |
references/connect.md |
| Subscriptions or recurring billing | Billing APIs + Checkout Sessions | references/billing.md |
| Embedded financial accounts / banking | v2 Financial Accounts | references/treasury.md |
Read the relevant reference file before answering any integration question or writing code.
Key documentation
When the user's request does not clearly fit a single domain above, consult:
- Integration Options — Start here when designing any integration.
- API Tour — Overview of Stripe's API surface.
- Go Live Checklist — Review before launching.
What ships with it
5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 11d ago First seen · 28 lines · 90 tokens per session scan A 5062f0c98003
stripe-best-practices is a skill published in the GitHub repository fanfan-de/anybox (57 stars, last pushed 28d ago), licensed MIT. It adds 90 tokens to every session and 407 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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