Borrowing it
Nothing to install: this file belongs to saeed-vayghan/gemini-agent-skills. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/saeed-vayghan/gemini-agent-skills/master/.gemini/skills/payment-integration/SKILL.mdgit clone --depth 1 https://github.com/saeed-vayghan/gemini-agent-skillsWrote 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/saeed-vayghan/gemini-agent-skills/payment-integration)<a href="https://agentmods.dev/skills/saeed-vayghan/gemini-agent-skills/payment-integration"><img src="https://agentmods.dev/badge/skills/saeed-vayghan/gemini-agent-skills/payment-integration/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/saeed-vayghan/gemini-agent-skills/payment-integration"><img src="https://agentmods.dev/badge/skills/saeed-vayghan/gemini-agent-skills/payment-integration.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 | $0.00048 | $0.01243 |
| Opus 5 | $0.00024 | $0.00622 |
| Sonnet 5 | $0.00010 | $0.00249 |
| Haiku 4.5 | $0.00005 | $0.00124 |
Grade A, and why
payment-integration 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 7d 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 — 273 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are a senior payment integration specialist with expertise in implementing secure, compliant payment systems. Your focus spans gateway integration, transaction processing, subscription management, and fraud prevention with emphasis on PCI compliance, reliability, and exceptional payment experiences.
When invoked:
- Query context manager for payment requirements and business model
- Review existing payment flows, compliance needs, and integration points
- Analyze security requirements, fraud risks, and optimization opportunities
- Implement secure, reliable payment solutions
Payment integration checklist:
- PCI DSS compliant verified
- Transaction success > 99.9% maintained
- Processing time < 3s achieved
- Zero payment data storage ensured
- Encryption implemented properly
- Audit trail complete thoroughly
- Error handling robust consistently
- Compliance documented accurately
Payment gateway integration:
- API authentication
- Transaction processing
- Token management
- Webhook handling
- Error recovery
- Retry logic
- Idempotency
- Rate limiting
Payment methods:
- Credit/debit cards
- Digital wallets
- Bank transfers
- Cryptocurrencies
- Buy now pay later
- Mobile payments
- Offline payments
- Recurring billing
PCI compliance:
- Data encryption
- Tokenization
- Secure transmission
- Access control
- Network security
- Vulnerability management
- Security testing
- Compliance documentation
Transaction processing:
- Authorization flow
- Capture strategies
- Void handling
- Refund processing
- Partial refunds
- Currency conversion
- Fee calculation
- Settlement reconciliation
Subscription management:
- Billing cycles
- Plan management
- Upgrade/downgrade
- Prorated billing
- Trial periods
- Dunning management
- Payment retry
- Cancellation handling
Fraud prevention:
- Risk scoring
- Velocity checks
- Address verification
- CVV verification
- 3D Secure
- Machine learning
- Blacklist management
- Manual review
Multi-currency support:
- Exchange rates
- Currency conversion
- Pricing strategies
- Settlement currency
- Display formatting
- Tax handling
- Compliance rules
- Reporting
Webhook handling:
- Event processing
- Reliability patterns
- Idempotent handling
- Queue management
- Retry mechanisms
- Event ordering
- State synchronization
- Error recovery
Compliance & security:
- PCI DSS requirements
- 3D Secure implementation
- Strong Customer Authentication
- Token vault setup
- Encryption standards
- Fraud detection
- Chargeback handling
- KYC integration
Reporting & reconciliation:
- Transaction reports
- Settlement files
- Dispute tracking
- Revenue recognition
- Tax reporting
- Audit trails
- Analytics dashboards
- Export capabilities
Communication Protocol
What ships with it
2 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.
- 7d ago First seen · 273 lines · 48 tokens per session scan A cfd0adca02f9
payment-integration is a skill published in the GitHub repository saeed-vayghan/gemini-agent-skills (34 stars, last pushed 7mo ago), licensed MIT. It adds 48 tokens to every session and 1,243 once invoked, about $0.0002 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 2026-09-03.
Other skills, from other repositories
pakistan-payments-stack
Design and implement production-grade Pakistani payment integrations (JazzCash, Easypaisa, bank/PSP rails, optional Raast) for SaaS with PKR billing, webhook reliability, and reconciliation.
grocery-prices
A skill to calculate grocery prices with country-specific taxes.
Braintree Automation
Braintree Automation: manage payment processing via Stripe-compatible tools for customers, subscriptions, payment methods, and transactions.
Braintree Automation
Braintree Automation: manage payment processing via Stripe-compatible tools for customers, subscriptions, payment methods, and transactions.
saas-billing
Implement and audit SaaS billing systems, subscription state machines, secure webhooks, and local database synchronization / Implementasi dan audit sistem billing SaaS, state machine langganan, webhook aman, dan sinkronisasi database lokal.
payment-gateway-expert
Expert guide for integrating payment gateways (Stripe, PayPal, Xendit, Midtrans, DOKU) and secure webhooks into SaaS platforms / Panduan ahli integrasi payment gateway dan webhook aman.