- MCP Server
- Yuki
Query and update Yuki with AI
Connect Yuki accounting software to Claude, ChatGPT, or any MCP client through Peliqan. Ask questions in plain English, get answers from a SOC 2 Type II warehouse, and create invoices or update administrations back in Yuki – no SOAP API code, no daily call-limit pain, no read-only compromises.
Pulling answers out of Yuki still takes too many clicks
Yuki automates a huge part of bookkeeping – OCR, bank feeds, robotic accounting – but every quick analytical question still means logging in, switching administrations, exporting reports, and pasting numbers into Excel. Accountancy firms running dozens of client domains lose hours on questions Claude could answer in seconds.
Yuki API is SOAP, not REST
Most modern integration tools assume REST or GraphQL - Yuki's SOAP web services need strict schema and namespace handling, which slows down DIY integrations
Default 1,000 API calls per day per administration
Heavy AI workloads quickly hit Yuki's daily web service ceiling - upgrades to 5,000 or 10,000 calls per day need accountant-level configuration
No cross-source joins
Combining Yuki with HubSpot, ecommerce platforms, Mollie, or banking data means custom SOAP-to-REST integrations and a separate warehouse
No native Yuki accounting MCP exists
Searches for "Yuki MCP" return developer projects from people named Yuki, not the accounting platform - DIY routes mean writing SOAP wrappers plus building your own MCP server from scratch
- What you get
Query sales invoices, purchase invoices, GL transactions, debtors, and documents in plain English
Write changes back - create UBL sales invoices, post purchase invoices, update projects
Join with 250+ apps - combine Yuki with CRM, banking, ecommerce, or any source
SOC 2 Type II certified – enterprise-grade security
Type
Cloud accounting and bookkeeping for SMEs and accountancy firms
Markets
Netherlands, Belgium, Spain (Visma group)
Website
- The solution
One MCP server. Read, write, and join across 250+ sources.
Peliqan syncs your Yuki accounting data into a built-in Postgres warehouse, exposes it via MCP for instant AI access, and routes writebacks through Peliqan’s connector layer so your live Yuki environment stays protected from API call limits and SOAP schema headaches.
Full read + write through MCP
Where DIY SOAP wrappers stop at read-only or take weeks to build, Peliqan supports full writeback. Create UBL sales invoices, post purchase invoices, update domain users, manage projects - all from Claude, ChatGPT, or n8n. The first managed Yuki accounting MCP that closes the loop.
Cached warehouse, never the live SOAP API
Your AI queries a Postgres warehouse, not Yuki's SOAP web services directly. No risk of hitting the 1,000 calls/day ceiling, no slowdowns during VAT close. Sync runs incrementally on your schedule (every 15 minutes by default).
Cross-source queries in one SQL statement
Join Yuki invoices with HubSpot CRM, Mollie payments, Shopify orders, or banking data in a single query. Federated via Trino, all in Peliqan's shared warehouse.
SQL + RAG on Yuki attachments
Combine structured SQL queries with semantic search across scanned invoices, OCR'd receipts, contracts, and other Yuki documents. The only MCP that answers questions about both your numbers and your scanned paperwork.
Total outstanding: €1,742,300 across 89 customers in 24 client books.
- Bakker Logistiek BV - €54,200 (78 days)
- De Vries Installaties - €38,400 (71 days)
- Kustadvies B.V. - €27,900 (64 days)...
- Data access
Key Yuki data available via MCP
Peliqan syncs Yuki web service data into structured warehouse tables that your AI can query directly across sales, purchase, accounting, and administrations.
| Entity | What your AI can answer | Writeback |
|---|---|---|
| SalesInvoices (UBL) | Revenue by customer, overdue invoices, aging analysis, payment status | ✓ |
| PurchaseInvoices | Supplier spend, open payables, expense categories, OCR-captured invoices | ✓ |
| GLAccounts / Transactions | P&L by department, GL drill-down, journal entries, period close | ✓ |
| Debtors / Creditors | Receivables and payables, debtor/creditor aging, payment terms | ✓ |
| Administrations / Domains | Multi-client portfolio, domain settings, fiscal year status | ✓ |
| Projects / Files | Project status, file attachments, billable items, time logs | ✓ |
| Bank Statements | Bank reconciliation, cash position, payment matching | ✓ |
| Users / BackOfficeRoles | Portal users, role assignments, permissions audit | ✓ |
| VAT Returns | VAT return status, period totals, Belastingdienst submissions | Read |
| Documents / OCR scans | Scanned invoices, receipts, contracts – queryable via RAG | Read |
- Use cases
What accountants and SMEs build with Yuki MCP
Cash collection
Daily debtor briefings
"Pull all overdue Yuki invoices over 30 days across all client books, group by client and customer, and rank by exposure." Claude queries your Yuki warehouse and returns a Slack-ready summary in seconds, scoped per administration.
Useful for: Bookkeepers, controllers
Accountancy practice
Multi-client portfolio reporting
Yuki accountancy firms run dozens or hundreds of client administrations. Ask Claude to surface clients with declining margins, unfiled VAT returns, or overdue receivables across the entire portfolio - one query covers every domain without per-client logins.
Useful for: Dutch and Belgian accountancy practices
VAT and compliance
Pre-submission VAT checks
"Summarise VAT totals by period for client X, flag any sales invoices missing UBL data or VAT codes, and give me a checklist before Belastingdienst submission." Joins Yuki sales invoices, GL accounts, and VAT codes in one query.
Useful for: Tax advisors, auditors
Invoice automation
UBL invoice agent
Build an AI agent that runs on incoming sales orders or contract events, drafts UBL-compliant sales invoices in Yuki, posts them to the right administration, and updates the customer record. Peliqan writeback handles the SOAP call so your AI stays in plain English.
Powered by: n8n + Peliqan MCP
- How it works
Always-fresh copy, never the live API
Peliqan keeps a working copy of your Yuki data in a Postgres warehouse, refreshed on your schedule. AI queries the warehouse for speed and safety. When AI needs to make a change, Peliqan routes the writeback through its connector layer – never letting AI hit the live Yuki SOAP web services directly.
AI never hits the Yuki SOAP API directly
All queries route through Peliqan's warehouse. Writebacks route through Peliqan's connector. Your live Yuki environment never sees a raw AI request.
No daily call-limit pain
Yuki's 1,000 calls/day ceiling per administration doesn't slow your AI down. The warehouse absorbs query load - even during heavy month-end VAT close or year-end reporting.
Always fresh, on your schedule
Incremental syncs run as often as every 15 minutes. You decide the cadence based on how fresh your bookkeeping, controlling, or accountancy team needs the data.
Full data, every administration
Every Yuki domain, every client administration, every record. Ready for cross-source joins, Text-to-SQL, and RAG on scanned documents.
- Setup guide
How to set up the Yuki MCP server
1
Connect Yuki in Peliqan
Click the Yuki connector in Peliqan and enter your web service API key and Administration ID. For multi-administration setups, add additional administrations under the same domain. Peliqan handles SOAP namespaces, headers, and the Sales/Purchase web service authentication separately. Setup guide →
2
Select and materialize tables
Choose which Yuki entities to sync – sales invoices, purchase invoices, GL accounts, debtors, creditors, administrations, projects, bank statements. Peliqan materializes them into Postgres on your schedule (default: every 15 minutes). Stay well within Yuki’s daily call ceiling. Materializing tables →
3
Create your MCP API handler
Use Peliqan’s built-in MCP template to expose the Yuki tables and operations your AI agents need. Set role-based permissions for read, write, or both – column-level masking for sensitive financial fields supported. AI agents docs →
4
Connect Claude or ChatGPT
Run pip install mcp-server-peliqan, add your Peliqan API credentials, and start querying Yuki with natural language. Open source on GitHub.
Enable MCP for Yuki
Learn how to enable the MCP server for Yuki in Peliqan. See how to connect AI assistants like Claude to your live Yuki sales invoices, purchase invoices, GL transactions, and OCR documents in just a few steps.
Peliqan vs other Yuki MCP options
There is no off-the-shelf Yuki accounting MCP server today – so most teams either build their own SOAP wrapper or rely on Yuki’s built-in dashboards and Excel exports. Here’s how the options compare.
| DIY SOAP wrapper | Yuki dashboards + Excel | Peliqan MCP | |
|---|---|---|---|
| Writeback to Yuki | Custom code | ✗ Read-only | ✓ Audited writeback |
| Cached warehouse | ✗ Live SOAP API | Manual exports | ✓ Postgres + Trino |
| Cross-source queries | ✗ | ✗ | ✓ 250+ sources |
| RAG on OCR documents | ✗ | ✗ | ✓ SQL + RAG combined |
| Setup time | Weeks | Hours | ✓ Under 30 minutes |
| Multi-administration handling | Manual | Per-admin login | ✓ Automatic |
| EU data residency | Self-hosted | In-Yuki | ✓ EU-hosted |
| BI + ETL + reverse ETL | ✗ MCP only | ✗ Read-only | ✓ Full data platform |
- Beyond MCP
The full Peliqan Yuki integration
MCP is one part of what Peliqan offers for Yuki. The full integration gives you a complete data platform for accountancy reporting, finance automation, and AI-powered analytics.
Connect your favourite BI tool, write data transformations in SQL or Python, and set up data quality checks – all on the same platform.
ELT connector
Full sync into built-in warehouse
MCP server
Claude, ChatGPT, n8n, Make
Text-to-SQL
Plain English financial queries
Reverse ETL
Push data back to Yuki
RAG + Graph RAG
Semantic search on documents
Data quality
SQL checks + Slack/email alerts
- FAQ
Yuki MCP, answered
What is the Yuki MCP server?
The Yuki MCP server is a Model Context Protocol endpoint that exposes your Yuki accounting data to AI agents like Claude, ChatGPT, and Cursor. Peliqan’s Yuki MCP server lets AI query sales invoices, purchase invoices, GL transactions, debtors, and administrations in plain English, and write updates back to Yuki – without writing SOAP integration code or building your own MCP wrapper.
Is this MCP for Yuki accounting software or another product?
This is for Yuki accounting software – the cloud bookkeeping platform from Visma group, founded in 2007 in Rotterdam, used widely by accountancy firms and SMEs across the Netherlands, Belgium, and Spain. Searches for “Yuki MCP” sometimes return developer projects from people named Yuki – this page is specifically for the Yuki accounting platform at yuki.nl.
How do I connect Yuki to Claude or ChatGPT?
Authenticate Yuki in Peliqan with your web service API key and Administration ID, pick the entities to sync, and add the Peliqan MCP endpoint to Claude Desktop, ChatGPT, Cursor, or n8n. Most accountancy firms go from Yuki authentication to first AI query in under 30 minutes. Full setup steps are in the guide above.
Will AI queries hit Yuki's 1,000 calls/day API limit?
No. Peliqan caches your Yuki data in a built-in Postgres warehouse and AI queries hit the cache, not Yuki’s SOAP web services directly. Your other integrations and accountancy workflows never compete with AI for Yuki API throughput. Sync runs incrementally on your schedule (every 15 minutes by default), well within Yuki’s per-administration daily call ceilings – even on the default 1,000 calls/day plan.
Does it support writeback, or is it read-only?
Peliqan supports both read and write through Yuki’s web services. Your AI agent can query Yuki data and also create UBL sales invoices, post purchase invoices, update domain users and projects, with full audit logging. Note that Yuki’s Purchase web service requires a separate Client ID/Secret request to Yuki support – Peliqan handles that authentication path once you’ve received the credentials. Writebacks route through Peliqan’s connector layer for safety.
Does it work for accountancy firms with dozens of Yuki client books?
Yes. Peliqan handles multi-administration Yuki setups automatically – one Peliqan workspace can sync many Yuki domains and administrations, and your AI agent can run queries across them. Particularly powerful for Dutch and Belgian accountancy practices running Yuki across hundreds of client books, where the alternative is logging into each domain separately or maintaining custom SOAP scripts per client.
Is Yuki accounting data secure with AI agents?
Peliqan is EU-hosted, SOC 2 Type II certified, and GDPR-compliant. Row-level and column-level access control let you mask or exclude sensitive fields (BSN numbers, payroll data, bank account details) from AI agents while still allowing operational queries. Every AI query and writeback is logged with full audit trail – relevant for accountancy practices serving regulated industries.
Do I need a data warehouse to use Yuki MCP?
No. Peliqan includes a built-in Postgres + Trino warehouse. Your Yuki data lands there automatically – no Snowflake, BigQuery, or dbt project required. If you already have a warehouse, Peliqan can sync to it as well, so your existing BI dashboards and reporting stay intact.
Unify, Automate & Activate Your Data
Connect all your SaaS apps, databases, and spreadsheets into one workspace. Build automations, analytics pipelines, and data apps – all in one place.
Peliqan is secure
Security, compliance, trust, privacy and availability are our highest priority. If you want more details, if you require a certificate or a copy of Peliqan’s operating procedures, contact us now.
SOC 2 Type 2 validates our security controls, ensuring your data is protected by independently audited security measures.
ISO 27001 certification ensures enterprise-grade information security, protecting your business with globally recognized standards.
GDPR compliance guarantees EU data protection compliance, keeping PII data secure within EU boundaries.
Skip the SOAP wrapper. Skip Excel exports. Start writing back from day one.
Connect Yuki, publish your MCP server, and let Claude (or ChatGPT, or n8n) answer bookkeeping, finance, and accountancy questions and update records – in minutes.
No credit card required · SOC 2 Type II certified · 2 weeks custom connector SLA