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 ssheleg/sheleg-dev --skill crypto-paymentsgit clone --depth 1 https://github.com/ssheleg/sheleg-devWrote 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/ssheleg/sheleg-dev/crypto-payments)<a href="https://agentmods.dev/skills/ssheleg/sheleg-dev/crypto-payments"><img src="https://agentmods.dev/badge/skills/ssheleg/sheleg-dev/crypto-payments/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/ssheleg/sheleg-dev/crypto-payments"><img src="https://agentmods.dev/badge/skills/ssheleg/sheleg-dev/crypto-payments.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 | $0.00079 | $0.04778 |
| Opus 5.5 | $0.00032 | $0.01911 |
| Sonnet 5.5 | $0.00016 | $0.00956 |
| Haiku 4.5 | $0.00008 | $0.00478 |
Grade A, and why
crypto-payments 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 13d 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 — 418 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Crypto payments
A card charge either succeeds or fails, and the amount is the amount. A crypto payment is a request that someone may partially satisfy, over-satisfy, satisfy late, or satisfy after the price moved. Almost every defect in a crypto checkout comes from writing card-shaped code and meeting one of those cases in production.
This skill is provider-neutral. Concrete request/response shapes for one gateway
live in references/heleket-provider.md;
the invariants below hold for Coinbase Commerce, NOWPayments, BTCPay, Heleket
and anything else that issues an invoice and calls you back. One thing is NOT
provider-neutral and is labeled where it appears: the webhook signature
algorithm, which differs per gateway.
Choosing a provider is a business and compliance decision, not a technical one. Crypto payment processors differ sharply in regulatory standing — licensing, AML programme, sanctions exposure — and that standing changes. Check the current position of any processor before you route customer money through it, and re-check it periodically. This skill tells you how to integrate one correctly; it does not tell you which one to trust.
Contents
- The lifecycle, and where money goes missing
- Status mapping — and finality
- Webhook signature verification
- Idempotent webhook processing
- Callback route hardening
- The conversion buffer
- Reconciliation fields
- Crediting: the amount waterfall
- Refunds and AML holds
- The test/live credential boundary
- Local development and the test matrix
- Security checklist
- Common pitfalls
What ships with it
3 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.
- 13d ago Changed · +1 lines · -27 tokens per session 1a9605a0b1de
- 18d ago Changed · -102 tokens per session 30c1ca0c3182
- 1mo ago Changed · +15 lines 84be59b3eac2
- 1mo ago Changed · -2 lines 014f3ccefd09
- 2mo ago Changed · +1 lines d2fb267b6bfe
- 2mo ago First seen · 403 lines · 208 tokens per session scan A f27fba43b283
crypto-payments is a skill published in the GitHub repository ssheleg/sheleg-dev (4 stars, last pushed 5d ago), licensed MIT. It adds 79 tokens to every session and 4,778 once invoked, about $0.0003 per session on Opus 5.5. 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.
crypto-payments compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| crypto-paymentsssheleg/sheleg-dev | Skill | 4 | 5d ago | MIT | A | 79 | Claude Code |
| stripe-integrationfinsilabs/awesome-ecommerce-skills | Skill | 63 | 15d ago | MIT | A | 29 | Claude Code, Codex |
| monetizationLiHongwei-cn/lihongwei-cn | Skill | 5 | 1mo ago | MIT | A | 43 | Claude Code, Codex |
| Stripe Paymentsclaude-office-skills/skills | Skill | 567 | 9mo ago | MIT | A | 18 | Claude Code, Codex |
| saas-paymentskomunite/tezgah | Skill | 92 | 7mo ago | MIT | A | 103 | Claude Code, Codex |
| usage-based-billingappeeky/stripe-skills | Skill | 5 | 3mo ago | MIT | A | 77 | Claude Code, Codex |
| pricing-products-auditappeeky/stripe-skills | Skill | 5 | 3mo ago | MIT | A | 60 | Claude Code, Codex |