Can the assistant change my bookkeeping in Yuki?

Only one thing: booking a general journal entry, and by default that waits for a person’s approval in the browser (your workspace’s rules decide). Everything else only reads. Contacts, invoices and document uploads are not offered.

Does every call count against Yuki’s daily limit?

Yes. Yuki allows a domain 1,000 free web service calls a day, and each tool call signs in first, so a call costs two of them, three when it also looks up the only administration.

Does Codex see the password or key for Yuki?

No. The key for Yuki is pasted into Flowplane once and kept sealed there. Codex only gets a Flowplane sign-in for you, which you can revoke in the console.

Can Codex change things in Yuki without asking?

Not by default: every change in Yuki waits for your approval in the browser. Your workspace’s rules decide, per tool.

Connect Codex to Yuki

Codex reaches Yuki through one Flowplane address. You add Yuki once in Flowplane, add that address to Codex, and sign in. Look through your Yuki bookkeeping with your AI assistant: open invoices, ledgers, revenue and documents. Journal entries only after you approve.

Connect Yuki →Set up your assistant

Tools: 5 read · 1 change
Sign-in: One shared key
Approval, by default: Changes wait for you
MCP server: Flowplane’s tools

1
Add Yuki in Flowplane
In the Flowplane console, add Yuki and paste the web service access key.
Yuki’s bookkeeping API works with a web service access key, not a personal login. A domain administrator creates the key in Yuki (Settings, Web services), chooses which services it may use and for which administrations, and pastes it into Flowplane once. Flowplane keeps it sealed; the assistant never sees it.
Connect Yuki →
2
Add Flowplane to Codex
Your address is shown in the Flowplane console; it looks like
https://mcp.flowplane.eu/<your-label>
1. Add the server with the first command below.
2. Sign in with the second: your browser opens Flowplane; sign in and allow Codex.
3. In the IDE extension: MCP servers › Add server, choose Streamable HTTP, paste https://mcp.flowplane.eu/<your-label>, then Authenticate.
```
codex mcp add flowplane --url https://mcp.flowplane.eu/<your-label>
codex mcp login flowplane
```
Steps checked against the vendor’s documentation (OpenAI)
3
Ask Codex
- “Which customers still owe us money, oldest first?”
- “What was our net revenue in the third quarter compared with the second?”
- “Show the bookings on ledger account 700000 for October.”
- “Find the scanned invoice from our energy supplier for September.”
- “Book a journal entry moving €1,200 from 499000 to 640000, dated today.”

What it can do

What Codex can do in Yuki

Yuki keeps the books of many Belgian and Dutch small businesses and their accountants. Through Flowplane an AI assistant can look up open invoices, the trial balance, the bookings on a ledger account, net revenue and scanned documents in Yuki. It can propose a general journal entry, which waits for your approval before it is booked.

Reads5

Open invoicesUnpaid sales or purchase invoicesoutstanding_items
Trial balanceEvery ledger account's balance on a dategl_balance
Ledger account transactionsThe bookings on one ledger accountgl_transactions
Net revenueTurnover in a periodnet_revenue
Search documentsFind scanned invoices and other documentssearch_documents

Changesasks first1

Book a journal entryPost a general journal entry, asked by defaultpost_journal

FAQ

Questions

Can the assistant change my bookkeeping in Yuki?: Only one thing: booking a general journal entry, and by default that waits for a person’s approval in the browser (your workspace’s rules decide). Everything else only reads. Contacts, invoices and document uploads are not offered.
Does every call count against Yuki’s daily limit?: Yes. Yuki allows a domain 1,000 free web service calls a day, and each tool call signs in first, so a call costs two of them, three when it also looks up the only administration.
Does Codex see the password or key for Yuki?: No. The key for Yuki is pasted into Flowplane once and kept sealed there. Codex only gets a Flowplane sign-in for you, which you can revoke in the console.
Can Codex change things in Yuki without asking?: Not by default: every change in Yuki waits for your approval in the browser. Your workspace’s rules decide, per tool.

Your assistant

Other assistants with Yuki

Everything about Yuki and Flowplane →

Flowplane is not affiliated with or endorsed by Yuki’s maker; the name and logo only identify the app. Pricing

Let your AI work with your data. Safely, from today.

Free for yourself, set up in a minute. For your team or company, we’re happy to help you get started.

Start free →Book a call