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Cashclaw Invoicer

Community
ertugrulakben
cashclaw-invoicer

Handles invoice creation, payment link generation, payment status tracking, and automated reminders via Stripe API. Supports multi-currency billing and recurring payments.

Overview

Publisherertugrulakben
Repositorycashclaw
Skill namecashclaw-invoicer
Stars
305
Forks
108
Bundled files
1
LicenseMIT
Links
  • Markdown instructions

    A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.

  • Works with any LLM

    AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.

  • 1 bundled files

    Scripts, templates, and references the model can read while it works. Files are read-only and never executed.

  • Open source

    Published by ertugrulakben on GitHub. Read the source before you install it.

Installation

Install the Cashclaw Invoicer AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

1

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

  1. Open the app and go to Plugins → Skills.
  2. Choose "Install from GitHub".
  3. Paste the skill folder URL below and confirm.
    https://github.com/ertugrulakben/cashclaw/tree/main/skills/cashclaw-invoicer
  4. Enable the skill in any chat where you want it available.
Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.
2

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills
git clone --depth 1 https://github.com/ertugrulakben/cashclaw.git /tmp/cashclaw
mkdir -p .claude/skills
cp -r /tmp/cashclaw/skills/cashclaw-invoicer .claude/skills/cashclaw-invoicer
Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Cashclaw Invoicer in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Cashclaw Invoicer on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Cashclaw Invoicer is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

  • Loaded only when it is needed

    The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.

  • Switch models mid-chat

    Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

CashClaw Invoicer

You handle all payment operations for CashClaw. You create invoices, generate payment links, track payment status, and send automated reminders. Every dollar earned must be tracked accurately. This is the skill that turns delivered work into collected revenue.

Prerequisites

  1. Stripe account with API access enabled.
  2. STRIPE_SECRET_KEY set in environment or ~/.cashclaw/config.json.
  3. Node.js 18+ installed (for the stripe-ops.js script).

Install the Stripe SDK:

bash
npm install stripe

Invoice Creation

When to Invoice

  • Pre-payment model: Create a payment link at ACCEPT stage. Client pays before work begins.
  • Post-payment model: Create an invoice at DELIVER stage. Client pays after receiving deliverables.
  • Recurring services: Create a Stripe subscription for monthly services (WhatsApp management, social media).

Invoice Data Structure

json
{
  "mission_id": "MISSION-20260223-001",
  "client": {
    "name": "Acme Corp",
    "email": "billing@acme.com"
  },
  "items": [
    {
      "description": "SEO Audit - Standard Tier",
      "quantity": 1,
      "unit_amount": 2900,
      "currency": "usd"
    }
  ],
  "due_date": "2026-03-02",
  "notes": "Thank you for choosing CashClaw!",
  "metadata": {
    "mission_id": "MISSION-20260223-001",
    "service": "seo-audit",
    "tier": "standard"
  }
}

Using the stripe-ops.js Script

bash
# Create a payment link
node scripts/stripe-ops.js create-link \
  --amount 2900 \
  --currency usd \
  --description "SEO Audit - Standard" \
  --mission "MISSION-20260223-001"

# Create a full invoice
node scripts/stripe-ops.js create-invoice \
  --email "billing@acme.com" \
  --amount 2900 \
  --currency usd \
  --description "SEO Audit - Standard" \
  --due-days 7

# Check payment status
node scripts/stripe-ops.js check-status \
  --invoice "in_1234567890"

# Send payment reminder
node scripts/stripe-ops.js send-reminder \
  --invoice "in_1234567890" \
  --template "gentle"

Using Stripe API Directly (curl)

If the script is unavailable, use curl with the Stripe API:

bash
# Create a customer
curl https://api.stripe.com/v1/customers \
  -u "$STRIPE_SECRET_KEY:" \
  -d "email=client@example.com" \
  -d "name=Client Name" \
  -d "metadata[mission_id]=MISSION-20260223-001"

# Create an invoice item
curl https://api.stripe.com/v1/invoiceitems \
  -u "$STRIPE_SECRET_KEY:" \
  -d "customer=cus_xxxxx" \
  -d "amount=2900" \
  -d "currency=usd" \
  -d "description=SEO Audit - Standard Tier"

# Create and send the invoice
curl https://api.stripe.com/v1/invoices \
  -u "$STRIPE_SECRET_KEY:" \
  -d "customer=cus_xxxxx" \
  -d "collection_method=send_invoice" \
  -d "days_until_due=7" \
  -d "auto_advance=true"

# Finalize the invoice
curl -X POST https://api.stripe.com/v1/invoices/in_xxxxx/finalize \
  -u "$STRIPE_SECRET_KEY:"

# Send the invoice
curl -X POST https://api.stripe.com/v1/invoices/in_xxxxx/send \
  -u "$STRIPE_SECRET_KEY:"

# Create a payment link (one-time)
curl https://api.stripe.com/v1/payment_links \
  -u "$STRIPE_SECRET_KEY:" \
  -d "line_items[0][price_data][currency]=usd" \
  -d "line_items[0][price_data][product_data][name]=SEO Audit" \
  -d "line_items[0][price_data][unit_amount]=2900" \
  -d "line_items[0][quantity]=1"

# Check invoice status
curl https://api.stripe.com/v1/invoices/in_xxxxx \
  -u "$STRIPE_SECRET_KEY:"

# List unpaid invoices
curl "https://api.stripe.com/v1/invoices?status=open&limit=100" \
  -u "$STRIPE_SECRET_KEY:"

Payment Reminder Flow

Automated reminders follow this exact schedule:

Day 0: Invoice Sent

Subject: Invoice #{number} from {Business Name}

Hi {name},

Please find your invoice for {service} attached.

Amount: {currency} {amount}
Due Date: {due_date}

Pay now: {payment_link}

Thank you for your business!

Best,
{Business Name}

Day 3: Gentle Reminder

Only send if invoice is still unpaid.

Subject: Friendly reminder: Invoice #{number}

Hi {name},

Just a quick reminder that invoice #{number} for {amount} is
due on {due_date}.

You can pay securely here: {payment_link}

If you have already paid, please disregard this message.

Thanks!
{Business Name}

Day 7: Follow-up

Subject: Invoice #{number} - Payment due

Hi {name},

Your invoice #{number} for {amount} is now past due.

We would appreciate it if you could process payment at your
earliest convenience: {payment_link}

If there is an issue with the invoice or you need to discuss
payment arrangements, please let us know.

Best regards,
{Business Name}

Day 14: Final Notice

Subject: Final notice: Invoice #{number} overdue

Hi {name},

This is our final reminder regarding invoice #{number} for
{amount}, which is now 14 days past due.

Please process payment immediately: {payment_link}

If we do not receive payment or hear from you within 48 hours,
we may need to pause any ongoing services.

If there are any issues, please reach out so we can work
something out.

Regards,
{Business Name}

Reminder Rules

  1. Never send more than 1 reminder per day.
  2. Stop reminders immediately once payment is received.
  3. If client responds to a reminder, pause automation and handle personally.
  4. After Day 14 with no response, escalate to operator -- do not send more reminders.
  5. Track all reminder events in ~/.cashclaw/ledger.jsonl.

Multi-Currency Support

Supported currencies and their Stripe codes:

CurrencyCodeSmallest UnitExample
US Dollarusdcents$29.00 = 2900
Euroeurcents29.00 EUR = 2900
British Poundgbppence29.00 GBP = 2900
Turkish Liratrykurus29.00 TRY = 2900
Canadian Dollarcadcents$29.00 CAD = 2900
Australian Dollaraudcents$29.00 AUD = 2900

Important: Stripe uses the smallest currency unit (cents, pence, etc.). Always multiply the display amount by 100 before sending to Stripe.

Currency Detection

  • Default to USD unless client specifies otherwise.
  • Detect from client's location or previous invoices.
  • Always confirm currency with client before invoicing.

Payment Tracking

Ledger Entry Format

Every payment event is logged to ~/.cashclaw/ledger.jsonl:

json
{"ts":"2026-02-23T12:00:00Z","event":"invoice_created","mission_id":"MISSION-20260223-001","invoice_id":"in_xxx","amount":2900,"currency":"usd"}
{"ts":"2026-02-23T12:01:00Z","event":"invoice_sent","mission_id":"MISSION-20260223-001","invoice_id":"in_xxx"}
{"ts":"2026-02-23T14:30:00Z","event":"payment_received","mission_id":"MISSION-20260223-001","invoice_id":"in_xxx","amount":2900,"currency":"usd","payment_id":"pi_xxx"}

Dashboard Update

After every payment event, update ~/.cashclaw/dashboard.json:

json
{
  "pending_payments": [
    {
      "invoice_id": "in_xxx",
      "mission_id": "MISSION-20260223-001",
      "amount": 2900,
      "currency": "usd",
      "status": "open",
      "due_date": "2026-03-02",
      "reminder_stage": 0
    }
  ],
  "recent_payments": [
    {
      "invoice_id": "in_yyy",
      "amount": 900,
      "currency": "usd",
      "paid_at": "2026-02-22T10:00:00Z"
    }
  ]
}

Refund Handling

If a client requests a refund:

  1. Verify the original payment in Stripe.
  2. Determine refund type:
    • Full refund: Client unhappy with deliverable. Process immediately.
    • Partial refund: Scope reduced or partial delivery. Calculate pro-rata.
  3. Process via Stripe:
bash
# Full refund
curl https://api.stripe.com/v1/refunds \
  -u "$STRIPE_SECRET_KEY:" \
  -d "payment_intent=pi_xxxxx"

# Partial refund
curl https://api.stripe.com/v1/refunds \
  -u "$STRIPE_SECRET_KEY:" \
  -d "payment_intent=pi_xxxxx" \
  -d "amount=1500"
  1. Log the refund event in the ledger.
  2. Update mission status to refunded.
  3. Send confirmation to client.

Recurring Billing

For monthly services (WhatsApp Manager, Social Media):

bash
# Create a product
curl https://api.stripe.com/v1/products \
  -u "$STRIPE_SECRET_KEY:" \
  -d "name=Social Media Management - Monthly Full" \
  -d "metadata[service]=social-media" \
  -d "metadata[tier]=monthly-full"

# Create a recurring price
curl https://api.stripe.com/v1/prices \
  -u "$STRIPE_SECRET_KEY:" \
  -d "product=prod_xxxxx" \
  -d "unit_amount=4900" \
  -d "currency=usd" \
  -d "recurring[interval]=month"

# Create a subscription
curl https://api.stripe.com/v1/subscriptions \
  -u "$STRIPE_SECRET_KEY:" \
  -d "customer=cus_xxxxx" \
  -d "items[0][price]=price_xxxxx"

Error Handling

Stripe ErrorMeaningAction
card_declinedCard was declinedAsk client for alternative payment method
expired_cardCard has expiredNotify client to update card
incorrect_cvcWrong CVCAsk client to retry with correct CVC
processing_errorStripe processing issueRetry after 5 minutes
rate_limitToo many API callsWait 60 seconds, then retry

Never expose raw Stripe error messages to clients. Translate them to human-friendly messages.

Example Commands

bash
# Create and send an invoice
cashclaw invoice --client "billing@acme.com" --amount 29 --service "SEO Audit" --due 7

# Check all unpaid invoices
cashclaw invoice --list --status unpaid

# Send reminders for overdue invoices
cashclaw invoice --remind --overdue

# Process a refund
cashclaw invoice --refund --invoice "in_xxxxx" --amount 29

Bundled files

The model reads these on demand while the skill is loaded. They are exposed as readable files and are never executed.

Frequently asked questions

What does the Cashclaw Invoicer AI skill do?

Handles invoice creation, payment link generation, payment status tracking, and automated reminders via Stripe API. Supports multi-currency billing and recurring payments.

Why use Cashclaw Invoicer on TypingMind?

Because you install it once and use it with any model. Cashclaw Invoicer is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Cashclaw Invoicer in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/ertugrulakben/cashclaw/tree/main/skills/cashclaw-invoicer. TypingMind reads its SKILL.md and bundles its files and installs it as a skill you can enable per chat.

Which AI models can use Cashclaw Invoicer?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Cashclaw Invoicer?

As many as you like. As long as a model supports skills, you can use Cashclaw Invoicer with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Cashclaw Invoicer AI skill free?

Yes. It is published on GitHub by ertugrulakben under the MIT license. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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