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 xsolla/xsolla-ai-kit --skill catalog-designgit clone --depth 1 https://github.com/xsolla/xsolla-ai-kitWrote 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/xsolla/xsolla-ai-kit/catalog-design)<a href="https://agentmods.dev/skills/xsolla/xsolla-ai-kit/catalog-design"><img src="https://agentmods.dev/badge/skills/xsolla/xsolla-ai-kit/catalog-design/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/xsolla/xsolla-ai-kit/catalog-design"><img src="https://agentmods.dev/badge/skills/xsolla/xsolla-ai-kit/catalog-design.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00153 | $0.01724 |
| Opus 5 | $0.00077 | $0.00862 |
| Sonnet 5 | $0.00031 | $0.00345 |
| Haiku 4.5 | $0.00015 | $0.00172 |
Grade A, and why
catalog-design 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 9d 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.
How it starts
The opening of the file, as written. The whole thing — 131 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Status
This skill is a draft authored by the catalog SME (@p.sanachev, Tech Lead, IGS-Left).
Detailed material lives in references/:
references/items.md— virtual items, VC, packages, bundles, groups (Admin API)references/game-keys.md— key packages, platforms, entitlementreferences/pricing.md— local prices, regional restrictionsreferences/catalog-client.md— client catalog callsreferences/purchase-and-tracking.md— purchase flows, order confirmation
When to use
Use this skill when the developer wants to:
- Create virtual items, virtual currency, VC packages, bundles, or item groups
- Sell a game or DLC via game keys (Steam, Epic, PlayStation, DRM-free, …)
- Set local prices per country or restrict sales by region
- Build the store catalog UI on the client (game or website)
- Implement purchase: fast purchase by SKU, cart, purchase for VC, free items
- Confirm purchases: webhooks on the server or order tracking on the client
Out of scope: player inventory, server-side cart, refund handling, payment UI
configuration (→ headless-checkout-integration), webhook handler code (→ webhooks-impl).
Prerequisites
export XSOLLA_MERCHANT_ID=<your merchant ID>
export XSOLLA_PROJECT_ID=<your project ID>
export XSOLLA_PROJECT_API_KEY=<your API key>
- An Xsolla project (run
merchant-setupfirst — it sets up these variables). - Xsolla MCP (strongly recommended). Connect the official Xsolla MCP server
(https://developers.xsolla.com/get-started/ai-assistants/). Before calling any
Admin API, verify the current request schema with the
search_xsolla_sourcestool — this skill links the right operations, but field-level schemas must come from live docs, not from this file. If the MCP is unavailable, fetch the linked developers.xsolla.com pages.
Steps
- Choose the archetype and set up the catalog (Admin API). Ask which of the two
the game needs (or both): in-game items (typical mobile/F2P) — groups → virtual
currency → virtual items → VC packages → bundles, see
references/items.md; or game sales via keys — a key package per platform → upload keys, seereferences/game-keys.md. Admin calls use basic auth (XSOLLA_MERCHANT_ID:XSOLLA_PROJECT_API_KEY); verify each request body via the Xsolla MCP first.
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.
- 9d ago First seen · 131 lines · 153 tokens per session scan A 9d107ef642d4
catalog-design is a skill published in the GitHub repository xsolla/xsolla-ai-kit (3 stars, last pushed today), licensed MIT. It adds 153 tokens to every session and 1,724 once invoked, about $0.0008 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 2026-08-31.
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