Recurring

mcp-recurring

Say "bill Acme 12 hours at 90 EUR on the 1st of every month" once, and stop remembering it. This MCP server stores recurring invoice schedules, client, line items, cadence, start and end dates, and then, when you ask, creates the invoices that have actually fallen due as real records in the invoice server, with its number series, its clients and its A4 PDF. Generation is idempotent: one invoice per schedule per period, keyed by the occurrence date, so running the billing run twice on the same day creates nothing the second time. It also answers "what falls due in the next 30 days" and "what will I invoice per month for the next year". Everything is stored in plain JSON files on your own machine; nothing is uploaded anywhere.

In the [official MCP Registry](https://registry.modelcontextprotocol.io/v0.1/servers/io.github.theluckystrike%2Frecurring-invoice-scheduler-subscription-billing-due-reminders/versions/latest) (io.github.theluckystrike/recurring-invoice-scheduler-subscription-billing-due-reminders).

Define a repeating invoice once, generate the due PDFs from chat, no billing SaaS required.

60-second install

npm publish for @theluckystrike/mcp-recurring is pending. Until then, the .mcpb one-click bundle or a clone+build is the working path, both are verified below.

One-click (.mcpb): download recurring.mcpb from the latest release and double-click it in Claude Desktop: https://github.com/theluckystrike/mcp-servers/releases/latest

(claude_desktop_config.json):

{

"mcpServers": { "recurring": { "command": "npx", "args": ["-y", "@theluckystrike/mcp-recurring"] } } }

Claude Code:

claude mcp add recurring -- npx -y @theluckystrike/mcp-recurring

(.cursor/mcp.json):

{

"mcpServers": { "recurring": { "command": "npx", "args": ["-y", "@theluckystrike/mcp-recurring"] } } }

The npx form above starts working the moment the package is published. Until then, use the .mcpb bundle above, or build from source with exactly these three commands:

git clone https://github.com/theluckystrike/mcp-servers.git && cd mcp-servers

npm install npm run build -w packages/mcp-license -w servers/invoice -w servers/recurring

Then point your client's command at node with one arg: the absolute path to servers/recurring/dist/index.js.

To run in Pro mode set MCP_LICENSE_KEY in the same config block, or call license_activate once with your key.

Pairs with

• [mcp-invoice](../invoice), required in practice, not by code. This server writes into the invoice server's data directory and shares its number counter, its client list and its business profile, so every generated invoice appears in invoice_list, counts in overdue_report and can be re-rendered with invoice_pdf. Set your issuer details once with business_set there; this server has no business_set of its own on purpose, so there is only one profile to keep right.
• [mcp-time-tracker](../time-tracker), for the hours that are not on a retainer. Track them, invoice them ad hoc, and leave the fixed monthly part to a schedule here.
• [mcp-expense-tracker](../expense-tracker), rebillable costs that change every month belong on an ad hoc invoice; a schedule is for the amount that does not change.

Tools

Resource: recurring://upcoming returns the next 30 days of occurrences as JSON. Prompt: monthly_billing_run, dry run, generate, list what is coming, then report who needs a payment reminder.

What you can say

Worked example

You: Bill Acme 12 hours at 90 EUR a month, starting 1 June, 14 day terms.

schedule_create { client: "Acme Retainer", currency: "EUR", every: "monthly", start_date: "2026-06-01", due_days: 14, items: [{ description: "Retainer hours", quantity: 12, unit_price: 90 }] } -> schedule 9f2c1a04, next dates 2026-06-01, 2026-07-01, 2026-08-01, 2026-09-01

You (on 3 September): Run the billing.

invoice_generate_due {} -> as_of 2026-09-03: created 4 invoices, skipped 0 already invoiced. INV-2026-0001 Acme Retainer period 2026-06-01 EUR 1080.00 due 2026-06-15 .../pdf/INV-2026-0001.pdf INV-2026-0002 Acme Retainer period 2026-07-01 EUR 1080.00 due 2026-07-15 .../pdf/INV-2026-0002.pdf INV-2026-0003 Acme Retainer period 2026-08-01 EUR 1080.00 due 2026-08-15 .../pdf/INV-2026-0003.pdf INV-2026-0004 Acme Retainer period 2026-09-01 EUR 1080.00 due 2026-09-15 .../pdf/INV-2026-0004.pdf Total: EUR 4320.00

You (five minutes later, having forgotten): Run the billing.

invoice_generate_due {} -> as_of 2026-09-03: created 0 invoices, skipped 4 already invoiced.

The second run is the point: the period, not the calendar day, is the key, so a repeated billing run is a no-op rather than a duplicate invoice sitting in a client's inbox.

Free vs Pro

Pro is a one-time $19, or $39 for every server in the collection, lifetime.

Dates: what happens at a month end

Every date is a local ISO calendar date, YYYY-MM-DD. An occurrence is the k-th step from start_date, and occurrence 0 is start_date itself, so a schedule starting today is due today.

• weekly = +7 days per step. {days: n} = +n days per step.
• monthly = +1 month, quarterly = +3 months, yearly = +12 months.
• Month ends. The month step keeps the day of month of start_date and clamps it to the length of the target month; it never carries the clamp forward. From 2026-01-31 the series is 01-31, 02-28, 03-31, 04-30, 05-31, February does not silently turn a month-end retainer into a 28th-of-the-month retainer.
• Feb 29. The same rule makes a yearly schedule starting 2028-02-29 fall on 02-28 in common years and back on 02-29 in the next leap year.
• `anchor_day` / `end_of_month` (Pro). anchor_day replaces the day of month before clamping, so anchor_day: 31 means the last day of every month; end_of_month: true does the same explicitly. Both are ignored for weekly and {days: n}, which have no month to anchor to. An anchored first occurrence that would land before start_date is dropped, never billed early.
• `end_date` is inclusive. An occurrence landing exactly on end_date is generated; the next one is not.
• Long-lived schedules. Looking up what is due does not replay the schedule from start_date: it jumps to an estimate near the date you asked about and scans forward from there, so a daily schedule created in 2010 still reports what is due in 2026 instead of exhausting its per-run occurrence cap walking there one day at a time.

Money

Amounts are held as integer minor units by the invoice engine, the same ISO 4217 table, the same round-per-line-then-sum contract, so a schedule's amount and the invoice it produces can never disagree. Each line's gross is rounded first, tax is computed and rounded per line and grouped into one line per rate, and the totals are integer sums of those already-rounded values. A schedule bills in its own currency, or your business default currency if it has none; nothing here converts between currencies.

How it stores data

Schedules and the generation log live in ${XDG_DATA_HOME:-~/.local/share}/mcp-servers/recurring/ as schedules.json and history.json. The go into the invoice server's directory, ${XDG_DATA_HOME:-~/.local/share}/mcp-servers/invoice/, with their PDFs under its pdf/ subfolder, the same files invoice_list, overdue_report and invoice_pdf read there.

Every mutation runs under an advisory lock file. Anything that writes an invoice takes two locks, always in the same order, recurring/.lock first, then invoice/.lock, so two billing runs (or a billing run and a hand-written invoice in the other server) cannot interleave, cannot allocate the same invoice number and cannot deadlock. Invoice numbers are allocated inside the lock; the PDFs are rendered after it is released, so a slow render never holds up the counter. Saves go to a temporary file and are renamed into place.

If schedules.json or history.json is unreadable or not valid JSON it is never treated as "empty": the file is moved aside byte-for-byte as .json.corrupt- , a .json.corrupt marker is written, and every tool fails loudly until you restore a good copy and delete the marker. This matters more here than anywhere else in the collection: a history.json silently read as empty would re-bill every period the schedule has ever covered.

Limits and honest caveats

• Nothing runs in the background. This is a stdio MCP server: it exists while your client runs it. No daemon, no cron, no email. Invoic