# HM Land Registry **Canonical:** https://apis.io/providers/hm-land-registry/ **Website:** https://www.gov.uk/government/organisations/land-registry **APIs profiled:** 14 HM Land Registry is the non-ministerial government department that registers the ownership of land and property in England and Wales, guaranteeing title to more than 26 million registered estates. In a United Kingdom market that has no MLS and no cooperative listing standard — residential listings are controlled by the Rightmove and Zoopla duopoly and reach them through agency CRM software — HMLR is the counterweight, and it sits at the legal foundation of the value chain rather than at the consumer end: it is the authoritative source of who owns what, what it sold for, and where its boundaries are, and every conveyancing transaction in England and Wales terminates at its register. Its API posture is genuinely and unusually good for a registry, but it is split into three tiers that should never be conflated. First, a real open layer: the landregistry.data.gov.uk platform serves a live, anonymous, unauthenticated SPARQL 1.1 endpoint plus a W3C Linked Data API over Price Paid Data and the UK House Price Index, with JSON/CSV/Turtle content negotiation, alongside bulk Price Paid CSVs and INSPIRE index polygons — all under the Open Government Licence v3.0 with no signup, no key and no fee. Second, a self-serve keyed tier: the Use land and property data service issues an API key automatically on account creation and exposes a documented REST API for dataset metadata and signed download URLs, but the datasets behind it require a signed licence per dataset and some are chargeable — the Registered Leases commercial licence is £5,000 a year plus VAT, and the National Polygon Service, which holds the title boundary polygons and the title number to UPRN lookup, is £20,000 a year plus VAT. A state registry selling the spatial extent of the public record back to the public is the finding, and it is recorded here plainly. Third, the Business Gateway: the B2B channel that conveyancers and their case management systems use to submit applications to change the register, order official copies and run priority searches. Its developer pack is fully public on GitHub Pages with eight downloadable OpenAPI 3.0/3.1 contracts and 37 SOAP XSDs, but the production host businessgateway.landregistry.gov.uk will not complete a TLS handshake without an HMLR-issued client certificate, and access requires signing a development licence and holding a business e-services account. There is no RESO Web API certification, no RESO Data Dictionary, no OData $metadata document and no Universal Property Identifier anywhere in HMLR's stack — RESO is a North American NAR construct with no UK adoption, and HMLR's machine-readable contracts are OpenAPI, XSD and W3C linked data instead. ## Kin Score — 54.1 / 100 (developing) Scored 2026-08-17 under rubric 0.11.0. Trend: flat (+0.0 from 54.1). | Facet | Score | |---|---| | Discoverability | 83.3 | | Contract Quality | 68.2 | | Governance | 21.9 | | Operational Transparency | 31.6 | | Developer Ergonomics | 62.5 | | Commercial Clarity | 44.7 | Regulatory layer — **Government & Public Sector**: 57.4 (matched via tags). ## Agent readiness — 57.0 (agent-native) | Dimension | Value | |---|---| | Spec Presence | yes | | Agentic Access | derived | | MCP Server | derived | | Auth Clarity | yes | | Idempotency | verified | | Error Semantics | verified | | OpenAPI Examples | verified | | Rate Limit Signal | no | | Event Surface Described | derived | | Agent Skills | derived | | Well Known Catalog | no | | Consent Identity | yes | | Agent Card | no | | Dry Run Mode | no | ## Access Open Government Licence open data (no key) · self-serve API key for dataset service · licence + client certificate for Business Gateway — onboarding: self-serve, pricing: freemium, trial: no (confidence: high). ## APIs (14) - **HM Land Registry Open Data SPARQL API** — Live SPARQL 1.1 query endpoint over HM Land Registry's open linked data — Price Paid Data transaction records for every property sale in England and Wales lodged for registratio... - **HM Land Registry Price Paid Data Linked Data API** — W3C Linked Data API over the Price Paid Data dataset, exposing every property sale in England and Wales sold for value and lodged for registration since 1995. Resources resolve ... - **UK House Price Index Linked Data API** — W3C Linked Data API over the UK House Price Index, the official house price statistic calculated by the Office for National Statistics from HM Land Registry, Registers of Scotla... - **Land Register API** — An OpenAPI 3.0.1 contract, version 6.0.0, titled "Land Register API" and published in the public Business Gateway developer pack. It describes two GET operations — /title/{title... - **HM Land Registry Estimate Completion Date API** — HM Land Registry Estimate Completion Date API from HM Land Registry — 1 path(s) described in OpenAPI. - **HM Land Registry HMLR Business Gateway (Hm Land Registry Official Copy Document Availability V1 Customer Test)** — HM Land Registry HMLR Business Gateway from HM Land Registry — 1 path(s) described in OpenAPI. - **HM Land Registry Official Copy Document Availability Service (Hm Land Registry Official Copy Document Availability V1)** — HM Land Registry Official Copy Document Availability Service from HM Land Registry — 1 path(s) described in OpenAPI. - **HM Land Registry HMLR Business Gateway (Hm Land Registry Official Copy Document Availability V2 Customer Test)** — HM Land Registry HMLR Business Gateway from HM Land Registry — 1 path(s) described in OpenAPI. - **HM Land Registry Official Copy Document Availability Service (Hm Land Registry Official Copy Document Availability V2)** — HM Land Registry Official Copy Document Availability Service from HM Land Registry — 1 path(s) described in OpenAPI. - **HM Land Registry Official Search of Whole with Data** — HM Land Registry Official Search of Whole with Data from HM Land Registry — 1 path(s) described in OpenAPI. - **HM Land Registry Registered Proprietor Names Service** — HM Land Registry Registered Proprietor Names Service from HM Land Registry — 1 path(s) described in OpenAPI. - **HM Land Registry V0.3 'Submit an application to change the Land Register API' Schema** — HM Land Registry V0.3 'Submit an application to change the Land Register API' Schema from HM Land Registry — 6 path(s) described in OpenAPI. - **HM Land Registry V1.0 'Submit an application to change the Land Register API' Schema** — HM Land Registry V1.0 'Submit an application to change the Land Register API' Schema from HM Land Registry — 10 path(s) described in OpenAPI. - **HM Land Registry Use Land and Property Data API** — HM Land Registry Use Land and Property Data API from HM Land Registry — 4 path(s) described in OpenAPI. ## MCP servers (1) - **hm-land-registry-mcp.yml** ## Agentic access (1) - **Hm Land Registry Agentic Access** — 29 operations · 11 acting ## Security (3) - **Hm Land Registry Authentication** — http/apiKey/none · 5 schemes - **Hm Land Registry Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC - **Hm Land Registry Vulnerability Disclosure** — Hackerone · security.txt · contact published ## Tags Real Estate, United Kingdom, Land Registry, Open Data, Title, Conveyancing, Property Records, Price Paid Data, Linked Data, Geospatial, Government, PropTech --- Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/hm-land-registry/). Scores are computed from the provider's own public artifacts under a published rubric.