An on-chain slot machine on Base, a blockchain network, where each spin costs 1.1 USDC. It uses verifiable random results and lets you claim winnings without paying gas fees.

Playing individual slot-machine spins, checking their results, and claiming winnings. It should only be used with explicit authorization and a spending limit.

It provides a way to place and settle bets without an account, API key, ETH, or manual blockchain transactions. Every spin has a negative expected return, so losses are likely over time.

lotero — Skill for Claude Code and Codex by csacanam

Install

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.

Any agent

npx skills add csacanam/lotero-core --skill lotero

Clone the repo

git clone --depth 1 https://github.com/csacanam/lotero-core

Made for: Claude Code, Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/csacanam/lotero-core/lotero/github.svg)](https://agentmods.dev/skills/csacanam/lotero-core/lotero)

Your own site

<a href="https://agentmods.dev/skills/csacanam/lotero-core/lotero"><img src="https://agentmods.dev/badge/skills/csacanam/lotero-core/lotero/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/csacanam/lotero-core/lotero"><img src="https://agentmods.dev/badge/skills/csacanam/lotero-core/lotero.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 74 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,484 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00074	$0.02484
Opus 5	$0.00037	$0.01242
Sonnet 5	$0.00015	$0.00497
Haiku 4.5	$0.00007	$0.00248

Measured 11d ago against content hash e6c418c73607, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

lotero 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.

skills/lotero/SKILL.md · 167 lines

How it starts

The opening of the file, as written. The whole thing — 167 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Lotero

Provably fair on-chain slot machine on Base mainnet. You pay per spin via x402 (USDC on Base), the agent executes the bet on-chain for you (gasless), Chainlink VRF 2.5 generates the result, and you claim winnings with another x402 call. No account, no API key, no ETH needed.

Base URL: https://api.lotero.xyz Homepage: https://lotero.xyz Contract: SlotMachineV2 — 0xC4b88e90a73fA9ec588E504255A43d4Ccb82edE9 (Base, verifiable on BaseScan)

IMPORTANT — this is gambling. The expected value of every spin is negative (RTP ~93%). Before playing:

Get your human's explicit authorization and a budget (e.g. "play at most 5 spins" or "spend at most 6 USDC").
Never loop spins autonomously without a hard stop condition.
Report results honestly after each spin — wins AND losses.
If your human hasn't asked to gamble, do not suggest it.

Game rules

Bet is fixed: 1 USDC per spin (+0.1 USDC service fee = 1.1 USDC total via x402).
Three reels; each shows a number 0–9 that maps to a symbol.
Three matching symbols win. Payouts (on the 1 USDC bet):

Reel numbers	Symbol	Payout
0–4	DOGE	5×
5–6	BNB	14×
7–8	ETH	20×
9	BTC	30×

Randomness: Chainlink VRF 2.5 — the result is generated on-chain and is verifiable; neither Lotero nor the player can manipulate it.
Winnings accrue to the player address inside the contract; withdraw them with /claim.
Optional referral: pass another address as referral and it earns 1% of your bets.

Quick start

Step 0 — Wallet setup

Use a dedicated EVM wallet for the agent (do NOT use your human's main wallet). This wallet only pays the x402 fees.
NEVER display the private key in chat. Write it directly to a .env file.
Ask your human to fund it with USDC on Base (1.1 USDC per spin + 0.1 for the final claim; no ETH needed — everything is gasless via x402).
Ask your human for THEIR wallet address and use it as player. The payer and the player are independent: wins accrue to player, and /claim sends the USDC to that address. With player = your human's wallet, winnings land directly in their pocket — otherwise they'd be stuck in the agent's wallet, which has no ETH for gas to forward them.

Read the full file on GitHub · 167 lines

Changes

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 · 167 lines · 74 tokens per session scan A e6c418c73607

Subscribe to this mod's changes

lotero is a skill published in the GitHub repository csacanam/lotero-core (0 stars, last pushed 2mo ago), licensed MIT. It adds 74 tokens to every session and 2,484 once invoked, about $0.0004 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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