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 login-setupgit 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/login-setup)<a href="https://agentmods.dev/skills/xsolla/xsolla-ai-kit/login-setup"><img src="https://agentmods.dev/badge/skills/xsolla/xsolla-ai-kit/login-setup.svg" alt="Measured on agentmods" 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 | $0.00332 | $0.03283 |
| Opus 5 | $0.00166 | $0.01641 |
| Sonnet 5 | $0.00066 | $0.00657 |
| Haiku 4.5 | $0.00033 | $0.00328 |
Grade A, and why
login-setup 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 8d 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 — 102 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 Login SME (@mohammed_abujalala).
Detailed material lives in references/:
references/setup-pa.md— Publisher Account configuration: standard vs shadow Login project, OAuth 2.0 clients (public, confidential, server), callback URLs, allowed origins (CORS), social providers, user data storage (Xsolla / PlayFab / Firebase / custom)references/integration-modes.md— Login Widget vs Login API vs Xsolla SDKs; JWT vs OAuth 2.0 protocol; client-side vs server-side callsreferences/auth-flows.md— every authentication method: classic (username/password), passwordless (email / SMS one-time code), social (browser redirect + native silent token), device ID, server custom ID, silent cross-platform (Steam / Xbox Live / Epic Games / PSN / Meta Horizon)references/tokens-and-validation.md— user JWT vs server JWT, claims, expiration & refresh, JWKS validation, common errors, rate limits, IP allowlistreferences/user-management.md— user profile, password reset, MFA, account linking, social linking, attributes, friends, search, ban/unban, export/import
When to use
Use this skill when the developer wants to:
- Add user authentication to a game or web app — register/sign-in, "Continue with Google/Facebook/Steam/Epic/PSN/Xbox/Meta", passwordless email or SMS one-time code, device ID, custom ID
- Configure a Login project in Publisher Account: OAuth 2.0 clients, callback URLs, social providers, MFA, password policy, rate limits, custom email/SMS templates
- Pick between Login Widget, Login API, or an Xsolla SDK — and between JWT and OAuth 2.0 protocols
- Issue and use a server JWT for server-to-server calls (create/import users, server-side attributes, etc.)
- Validate a user JWT in their backend (signature,
iss,exp,xsolla_login_project_id,groups,sub) - Manage users: link social accounts, reset password, enable MFA, edit profile, manage attributes, ban/unban, search, export/import
- Build a shadow Login project for cross-platform accounts (main account ↔ Steam / Xbox / Epic / PSN platform accounts)
- Provide a logged-in
Bearer JWTto Store / cart / payment-token flows incatalog-design, Headless Checkout inheadless-checkout-integration, oruser.idto the handler inwebhooks-impl - Style / theme / brand the Login UI so the widget matches the game — hand off to
login-styling
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.
- 8d ago First seen · 102 lines · 332 tokens per session scan A 1b7e8f2d9051
login-setup is a skill published in the GitHub repository xsolla/xsolla-ai-kit (3 stars, last pushed 19d ago), licensed MIT. It adds 332 tokens to every session and 3,283 once invoked, about $0.0017 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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