sdlt-calculator

Conveyancing Toolkit

The open-source AI toolkit for UK residential conveyancing. Free forever.

Built and maintained by Moverly. Open to contributions from everyone.

---

What this is

A collection of AI-ready tools that give conveyancers, estate agents, and property professionals instant access to structured property intelligence through Claude, OpenClaw, or any AI platform that supports the Model Context Protocol.

Every tool in this toolkit is free, open source, and MIT-licensed.

We believe the conveyancing profession deserves better tools. We're building them in the open and we want your help.

Tools

Standalone — works immediately, no setup

Tool	What it does
SDLT Calculator	Stamp Duty Land Tax — standard, first-time buyer, additional property, non-UK resident. Deterministic script with live rate updates. 3 out of 5 models get SDLT wrong without this tool.
Lender Pre-Screen	Full UK Finance Lender's Handbook Part 1 (90+ checks, 24 categories) plus Part 2 requirements for 60+ individual lenders.
Lender Comparison	Compare requirements across multiple lenders simultaneously — spawns parallel agents, returns a suitability matrix in seconds.
Lease Impact Advisor	Saleability assessment for leasehold properties — risk banding, lender eligibility matrix (13 lenders), extension cost estimates, marriage value analysis.
AML Source of Funds	Per-element evidence requirements, SAR obligations, record-keeping periods.
Building Regulations	Approval routes, enforcement timelines, competent person schemes, the "before any approach" rule.
Restrictive Covenant Advisor	s84 LPA 1925 grounds, indemnity insurance, modification applications, visibility risk assessment.

PDTF Connector — standard property data

The PDTF MCP specification defines a standard protocol for property transaction data. Any system that implements it — Moverly, NPTN, or others — can be connected using this skill.

Tool	What it does
PDTF Connector	Transaction data, PDTF state, verified claims, provenance, vouch, document upload, schema queries, form progress, enquiry management. Works with any PDTF-compliant MCP server.

Moverly Intelligence — proprietary risk analysis

These tools connect to Moverly's proprietary diligence engine. They require a Moverly API token.

Tool	What it does
Moverly Diligence	Risk flags from the Diligence Engine (37 categories, 323 checks, 2,215 scenarios), document processing status, risk history, flag management.
Report on Title	Generate buyer's conveyancer Reports on Title from verified transaction data and diligence engine risk flags.

The three layers

┌─────────────────────────────────────────────────────────┐
│  Standalone Tools          No connection needed          │
│  SDLT · Lender Pre-Screen · Protocol Checklists · ...   │
├─────────────────────────────────────────────────────────┤
│  PDTF Connector            Any compliant MCP server     │
│  Claims · Provenance · Vouch · Upload · Enquiries       │
├─────────────────────────────────────────────────────────┤
│  Moverly Intelligence      Proprietary                  │
│  Risk Flags · Processing Queue · Risk History · RoT     │
└─────────────────────────────────────────────────────────┘

The PDTF Connector speaks the industry standard. We're adding the MCP server specification to the PDTF standard — any platform that implements it (Moverly, NPTN, or new entrants) will be compatible with this toolkit out of the box.

Moverly Intelligence is the proprietary layer on top. Deterministic risk analysis across 37 categories using 2,215 rule-based scenarios, with full evidence provenance and commercial impact analysis. Not an LLM. Not probabilistic.

Quick start

Claude Code

# Clone and point Claude at any tool
git clone https://github.com/MoverlyLtd/conveyancing-toolkit.git

# Then ask Claude:
# "Calculate SDLT on a £425,000 purchase for a first-time buyer"
# "Pre-screen this property against Nationwide's Part 2 requirements"
# "This property has 68 years on the lease — what's the impact on saleability?"

OpenClaw

# Install individual tools
npx clawhub@latest install moverly/sdlt-calculator
npx clawhub@latest install moverly/lenders-handbook-prescreen

Any MCP-compatible platform

Point your agent at the skills/ directory. Each tool has a SKILL.md that the agent reads for instructions.

Documentation