# Landmark Information Group **Canonical:** https://apis.io/providers/landmark-information/ **Website:** https://www.landmark.co.uk/ **APIs profiled:** 7 Landmark Information Group is a United Kingdom property and land data business, part of Daily Mail and General Trust (DMGT), that sits in the middle of the UK residential and commercial property transaction rather than at the listing end of it. Founded in 1995 and headquartered in Exeter, it aggregates 700+ datasets from nearly 400 suppliers — Ordnance Survey mapping and AddressBase/UPRN addressing, environmental and flood and mining risk, historical maps, planning applications, and Barbour ABI project data — and sells them as conveyancing search reports (SearchFlow, Envirocheck, RiskView, SiteSolutions), estate agency compliance and material information products (LandmarkAgent, Metropix floor plans), case management software for property lawyers (Optimus, Intelliworks, Ochresoft, Vantage), and lender/surveyor valuation infrastructure (Secure Panel Network SPN and SPN+, Q-Guard). The UK has no MLS and no RESO equivalent — residential listings are controlled by the Rightmove/Zoopla duopoly and reached through agency CRMs — so Landmark is not a listings company; it is the transaction-data and workflow layer beneath conveyancers, lenders, surveyors, and agents. Its API posture is unusually honest for this sector: Landmark runs a genuinely public, un-gated API documentation portal at landmarkcloudservices.com that publishes full OpenAPI 3.x contracts for its Compliance/Order, Conveyancing, Intelliworks, Document Vault, and Milestone Notification APIs, plus a public HTML technical pack for the Barbour ABI-powered Planning API. Reading the contracts is open to anyone; calling them is not. Every API is OAuth 2.0 client-credentials against Landmark's Auth0 tenant with a client ID and secret issued only after a commercial account is onboarded ("your Landmark contact will confirm what's available to you"), and the Planning API requires a paid subscription or pay-as-you-go agreement plus an API key issued by Landmark. There is no RESO Web API certification, no RESO Data Dictionary posture, no OData $metadata document and no Universal Property Identifier anywhere in Landmark's surface — RESO is a North American MLS construct and is simply absent from the UK market. Landmark publishes no open data of its own; the open UK property layer belongs to HM Land Registry and Ordnance Survey, both of which are Landmark suppliers rather than Landmark products. ## Kin Score — 52.8 / 100 (developing) Scored 2026-08-17 under rubric 0.11.0. Trend: flat (+0.0 from 52.8). | Facet | Score | |---|---| | Discoverability | 83.3 | | Contract Quality | 68.9 | | Governance | 11.5 | | Operational Transparency | 50.0 | | Developer Ergonomics | 62.5 | | Commercial Clarity | 34.2 | ## Agent readiness — 46.2 (agent-ready) | Dimension | Value | |---|---| | Spec Presence | yes | | Agentic Access | derived | | MCP Server | derived | | Auth Clarity | yes | | Idempotency | no | | Error Semantics | verified | | OpenAPI Examples | partial | | Rate Limit Signal | documented | | Event Surface Described | derived | | Agent Skills | derived | | Well Known Catalog | no | | Consent Identity | no | | Agent Card | no | | Dry Run Mode | no | ## Access Paid · Commercial onboarding required · Public documentation — onboarding: unknown, pricing: paid, trial: yes (confidence: high). ## APIs (7) - **Landmark Order Experience API** — Compliance ordering API used to place and retrieve Landmark compliance product orders — AML individual and company checks, UK and international AML with facial recognition, Pers... - **Landmark Conveyancing Experience API** — Panel conveyancing API for quoting, instructing and managing conveyancing work through Landmark Optimus. Introducers create quotes, choose a conveyancer and instruct on a client... - **Landmark Intelliworks APIs** — Case creation and management API for the Intelliworks legal case management system, letting third-party systems create and update cases outside the Intelliworks UI for Sale, Pur... - **Landmark Document Vault API** — API behind Contract Pack Vault — creates a secure, shareable container of transaction documents, adds and removes files (virus-scanned and analysed asynchronously, status Pendin... - **Landmark Milestone Notification Service API** — Callback registration API for valuation transaction milestone notifications on the Landmark Secure Panel Network (SPN). Consumers register, update and delete callback URLs that ... - **Landmark Planning API (powered by Barbour ABI)** — RESTful planning-application data API combining Barbour ABI project information with Landmark geospatial data, covering UK and Republic of Ireland planning applications from 1 J... - **Landmark Geodata Web Map Tile Service (WMTS)** — On-demand raster mapping tile service delivered against the Open Geospatial Consortium Web Map Tile Service (OGC WMTS) standard, with 20 zoom levels spanning Ordnance Survey Mas... ## MCP servers (1) - **landmark-information-mcp.yml** ## Agentic access (1) - **Landmark Information Agentic Access** — 51 operations · 32 acting · 1 human-in-the-loop ## Security (2) - **Landmark Information Authentication** — http/oauth2/apiKey · 3 schemes - **Landmark Information Domain Security** — TLSv1.3 · HSTS · DMARC ## Tags Real Estate, United Kingdom, PropTech, Property Data, Conveyancing, Land Registry, Geospatial, Valuation, Anti-Money Laundering, Planning Data, Mortgage --- Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/landmark-information/). Scores are computed from the provider's own public artifacts under a published rubric.