Zovo Change Order MCP Server

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Two ways to run it, both free to start. Open mcp.zovo.one/mcp/connect, copy the change-order URL and paste it into any client that takes a URL. It already carries a free token, so there is nothing to install, no account and no header to set. The URL is https://mcp.zovo.one/mcp/change-order/t/<token>. The token is not optional: the bare https://mcp.zovo.one/mcp/change-order connects and lists its tools and then answers every tool call with HTTP 401, so use the link from /mcp/connect or send Authorization: Bearer <token>. Or download change-order.mcpb and double-click it in Claude Desktop.

mcp-change-order

In the official MCP Registry (io.github.theluckystrike/change-order). Change orders against a quote or a work order, kept the way a variation is kept on site: what was added, what was taken out and what changed, each with a reason and a date, sent to the client, and answered. The running contract value is the original plus the deltas the client has APPROVED; what they have not answered yet is shown as pending and never added in. Once a change order is approved, the delta comes back as invoice_create -ready items in MAJOR units and quote_create -ready items in MINOR units, in one call, with the scale printed against each.

No delta is stored. A change order holds its lines and its status history; the delta, the running value and the VAT are derived on every call, with the invoice server's own arithmetic. Nothing is invented: the first change order against a reference states the original contract value once, every later one inherits it, and a different figure is refused by name.

Install

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

Hosted, no install: point a URL-based client at https://mcp.zovo.one/mcp/change-order. GET https://mcp.zovo.one/mcp/connect mints a token and prints a ready URL.

npm publish for @theluckystrike/mcp-change-order is pending, so the npx line below returns 404 today.

Claude Desktop

~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):

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

Claude Code

claude mcp add change-order -- npx -y @theluckystrike/mcp-change-order

Cursor

~/.cursor/mcp.json (global) or .cursor/mcp.json (project), same entry as Claude Desktop.

Tools

Tool	What it does
change_order_create	Raise a change order against a quote or work order: reference, client, title, date, and the original contract value on the first one
change_order_add_line	Add an added, removed or changed line to a draft, with its quantity, unit price in minor units, reason and date
change_order_status	Move it along: draft to sent, sent to approved or rejected, draft or sent to void, each step dated
change_order_get	One change order in full: every line with its delta, the VAT, the history and the running value of the reference
change_order_list	Change orders by reference, status, client and date range, with approved and pending deltas per currency
change_order_delete	Delete an empty draft raised by mistake. Free on every tier
contract_value	The running value of one reference: original, approved delta, current value, pending delta held apart
change_order_document	The change order as a plain-text document for the client to approve
change_order_invoice_payload	The approved delta as invoice_create items (MAJOR units) and quote_create items (MINOR units)
license_status / license_activate	Free or Pro, and where to upgrade

Free vs Pro

	Free	Pro
Open change orders (draft and sent)	5	unlimited
Lines per change order	200	200
Raise, line, move, get, list, delete	yes	yes
Running contract value	yes	yes
Change order document	no	yes
Invoice-ready delta payload, both scales	no	yes

The cap counts OPEN change orders, the ones the client has not answered, not the ones you have ever raised. Approving, rejecting or voiding one frees its slot, and so does change_order_delete on a draft with no lines; all of those are free on every tier, because a way back that only a Pro key can reach is not a way back.

Get Pro: https://mcp.zovo.one/buy/change-order (one-time $19, lifetime), or all servers for $39: https://mcp.zovo.one/buy/bundle Or the 46-server bundle for $39.

The status machine

draft to sent; sent to approved or rejected; draft or sent to void. Approved, rejected and void are final. A draft cannot be approved directly: approval is the client's answer to something they were sent. Lines are added only while a change order is a draft; a sent one that needs another line is voided and raised again, so the client's approval always refers to what they were sent. Every step carries its own date, and a step dated before the last one is refused.

Where the money comes from

This server keeps no arithmetic of its own. computeTotals, currencyDecimals, formatMoney and roundHalfUp are imported from @theluckystrike/mcp-invoice/lib, the corrupt-store quarantine from @theluckystrike/mcp-timezone/lib, the timezone-aware "today" from @theluckystrike/mcp-quotes/lib. The VAT rate, the currency and the business name come from the shared business profile that business_set in the invoice server writes. Nothing is written outside this server's own directory, and no sibling store is opened.

The measured insight

A changed line is two items, not one, because one net item shows the customer nothing they can check. A line that goes from 3 x EUR 450.00 to 5 x EUR 420.00 is worth +EUR 750.00, and the tempting payload is one item of quantity 1 at EUR 750.00. The customer cannot reproduce that figure from anything on the change order they signed. The payload this server emits is a reversal, -3 x EUR 450.00, and the revised line, 5 x EUR 420.00; each reproduces on a calculator, and computeTotals over both is the same +EUR 750.00, because the invoice server's roundHalfUp is symmetric in sign. The same rule carries a removal as a negative quantity at the unit price it was booked at, which invoice_create accepts. The unit suite re-runs the invoice server's own computeTotals over the payload as returned and asserts the four item values and the three totals, then feeds the quote_create items into the same engine as though their MINOR figure were MAJOR and asserts the net is exactly 100x, so the day someone "simplifies" the payload to one net item, or moves a field between the two scales, the build says so instead of the customer.

Privacy

All data stays on your machine, in ${XDG_DATA_HOME:-~/.local/share}/mcp-servers/change-order/. Nothing is sent anywhere. There is no account and no API key. License keys are verified offline. This server reads one file it does not own, the shared business profile, and writes into no store but its own.

Built by theluckystrike. https://github.com/theluckystrike

First five minutes

One prompt that scored 3 of 3, measured in round 39, 2026-09-06. Paste it in as it is written.

We are Kestrel Electrical, a two-man electrical firm. Everything is in EUR with 23% VAT on every line. Raise a change order against our quote Q-2026-0031 for the Bright Bakery rewire. The quote was worth EUR 8,400.00 net before any changes. Two things changed on site, both agreed on 4 September 2026: we added 6 extra double sockets at EUR 45.00 each because the owner wants more counter outlets, and the downlights line changed from 12 at EUR 38.00 to 16 at EUR 35.00 because the ceiling plan grew and we agreed a lower unit price for the bigger run. Put both on the change order with those reasons and tell me what is on file.

Paste this into Claude with the server connected.

What it did, measured in round 39, 2026-09-06: Five tool calls, every argument in minor units without being told the unit, tax_rate 23 on both lines, and a changed line written as was 12 x 38.00 to 16 x 35.00 rather than as one net item.

On the free tier for this path: Five OPEN change orders, draft and sent, and 200 lines each on every tier. The cap counts the ones the client has not answered rather than the ones ever raised, so approving, rejecting or voiding one frees its slot, and change_order_delete on a draft with no lines is free on every tier, because a way back that only a Pro key can reach is not a way back. contract_value is free on every tier: the running value is the thing the change orders exist to answer, and withholding it would withhold the record. A byte-identical change order is refused BEFORE the cap is consulted, so the refusal names the id already stored rather than selling an upgrade, and burns neither a slot nor a CO number.

Set it up in your client

Exact config path, entry and caveats: Claude Desktop · Claude Code · Cursor · VS Code · Windsurf · Cline · Claude.ai and Claude Desktop connectors · all clients

Guides

How to track billable hours inside Claude Code and Cursor · Create an invoice PDF from a chat message with an MCP server · Ask questions about an Excel or CSV file from Cursor or Claude · Watch a product price with Claude and get told when it drops · What the free tier includes and what Pro adds · Log expenses and mileage in Claude, split VAT, rebill to an invoice · Convert currencies in Claude with real ECB rates, no API key · Generate Word proposals and contracts from a chat message · Find a meeting time across time zones without doing the arithmetic · Write a resume and a cover letter from chat, without inventing anything · Bill a retainer on a schedule without a billing SaaS · Assemble a contract from your own clause library, in chat · Connect MCP servers to Claude.ai, Claude Desktop, Cursor and VS Code without installing anything · Merge, split and stamp PDFs from chat, and why some come back as glyph numbers · Read a.ics calendar in Claude: free and busy, conflicts, and billable meetings · Run a kanban board in Claude, with time tracking on the same task · Resize, compress and watermark images from a chat message · Categorize and reconcile a bank CSV export from chat · Send a quote from chat, then turn the yes into an invoice · Put a SEPA payment QR code on an invoice from chat · Zip and unzip archives safely from Claude or Cursor · Client deposits and retainers from chat, applied to your real invoices · Fixed assets and depreciation from chat, on the rates the tax authorities publish · Per diem and travel allowances from chat, on the rate tables the tax authorities publish · One double-entry ledger out of every server you already run · Loan and lease schedules from chat, closing exactly on zero · Work orders and job cards from chat, and why the markup goes on the unit cost · Price lists and rate cards from chat, and the 100x scale gap between the invoice and the quote · Change orders and the running contract value from chat, and why a changed line is two items · A petty cash float from chat, and why the cheque is not the sum of the vouchers · Client statements and payment chasers from chat, aged as at any date you name · Credit notes and purchase orders from chat, against your real invoices · One install, every server: the office-suite bundle · Close a month in chat: invoice, credit note, retainer, bank reconciliation, statement · MCP server not showing up in Claude Desktop: the six checks that find it · Where is claude_desktop_config.json, and what goes in it · claude mcp add: every flag, and the scope that silently loses your server · MCP servers on Windows: spawn npx ENOENT, backslashes and the PATH · Installing these MCP servers when npx does not work yet · Cursor MCP setup: mcp.json, the required type field, and where the servers appear · Which MCP servers work with no network at all · Invoicing an EU client with reverse charge, from a chat message · Quote, deposit, invoice, statement: the whole cycle in one conversation · Is this project making money? Hours against costs, without a spreadsheet · Building a tax year pack for your accountant from chat · Keeping a mileage log in chat, with the rate you actually claim · Reconciling a bank CSV against what you invoiced and spent · Rebilling client expenses, with a markup and the VAT handled honestly · Chasing an unpaid invoice: aging, then the letter · A bill of sale from chat, with the identifiers checked and the signature lines printed · Pricing a job from a rate card, and what to do when the scope changes · Working out your hourly rate from what you actually billed · Converting CSV to xlsx and back without opening Excel · Asking a spreadsheet questions in plain language · Merging a folder of receipts into one PDF from chat · Splitting one big scan into separate documents · Sending a month of paperwork as one archive, safely · MCP servers in VS Code: the one-word mistake that breaks every config · MCP servers in Windsurf and Cline: two defaults that waste an afternoon · Local MCP server or hosted URL: which one, and what you give up · What these MCP servers actually do on the free tier · Choosing an MCP server for invoicing: the seven questions worth asking · When you need an MCP server, and when a prompt is enough · MCP config file locations and JSON keys, every client · Why an MCP server does not appear, in order of likelihood · How MCP registry search actually works, measured · What is actually in the MCP registry: 6,000 rows counted · stdio or streamable HTTP: which MCP transport, and what breaks · MCP protocol versions: what each one changed · Every field in an MCP server config entry, by client · MCP config scopes: which definition wins when a server is defined twice · Where each MCP client writes its logs · Shipping an MCP server: a bundle to download or a URL to paste · What is inside a.mcpb MCP bundle · Charging for an MCP server: how licensing actually works · How much text an MCP server may return, and how much it may describe · What to check before letting an MCP server run · Why a directory says your hosted MCP server is not responding · The MCP registry binds one remote URL to one server name · Capital letters in your GitHub username change your MCP registry rank · How many MCP servers already have your word in the name · server.json field reference for the MCP registry · When an MCP tool fails, do not return a JSON-RPC error · structuredContent and outputSchema in MCP, and what MUST hold · Rules for naming an MCP tool, and the collision nobody plans for · MCP has no session, so how do two tool calls share state · x-mcp-header: mirroring tool parameters into HTTP headers · How a directory scores an MCP server, and why your worst tool decides it · What AI crawlers fetch that Googlebot does not, measured on 141 URLs · Search Console's URL Inspection API changes its answer between calls · Which MCP servers work by pasting a URL, with nothing installed · Where to find MCP servers that cost money, and how you actually pay · Getting an assistant to fill in a quote or estimate for a customer · Is there an MCP server for a petty cash book or a cash ledger · Currency conversion in an assistant, and which MCP server to use · Zipping and unzipping archives from an assistant, and what the guards do · Producing a delivery schedule or a work order document from a chat · Will an MCP server email the invoice to my client · Can an assistant read a photo of a receipt and log the expense · Which MCP server can generate invoice PDFs from a chat message? · Can an MCP server read a bank statement PDF and categorise the transactions? · Best MCP servers for small business accounting and paperwork in 2026 · MCP Supplier Directory: keep supplier lists from rotting in a spreadsheet · MCP Service Agreement: stop copying a rotting contract template off the internet · MCP Maintenance Log: know what service is due without anyone remembering · MCP Mileage Log: keep the deductible log at the moment of the drive, not in April · Invoice payment terms best practices: Net 30, due date and late fees · How to categorize bank transactions · Petty cash log template · All guides

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