generated: '2026-07-26' method: searched source: https://api.twentyci.co.uk/documentation#glossary-of-terms source_corpus: https://api.twentyci.co.uk/api/documentation/markdocs source_status: 200 note: >- TwentyCi publishes a real "Glossary of Terms" page inside the TwentyAPI documentation. The twelve definitions below are TwentyCi's own wording, transcribed verbatim (including its own typographical errors, which are left uncorrected and flagged). The trailing `usage_in_api` block is an API Evangelist derivation showing where each term actually surfaces in the harvested OpenAPI - it is marked as derived and is not a TwentyCi claim. publisher: TwentyCi scope: TwentyAPI v2, UK residential property data terms: - term: API expansion: Application Programming Interface definition: >- An Application Programming Interface, is like a waiter in a tech restaurant, taking your order (requests) and delivering the dish (data) from the kitchen (server) to your table (application). provenance: verbatim - term: AVM expansion: Automated Valuation Model definition: >- An Automated Valuation Model (AVM) is a software-based tool that's used in residential and commercial real estate to determine property value. The service uses mathematical or statistical modeling with a combination of existing databases to determine the value of a particular property. provenance: verbatim - term: Epoch Date Format definition: >- An epoch format is a way of counting time in seconds that has passed since a specific point in history, like counting the seconds on a stopwatch from the moment it started. provenance: verbatim - term: PIPA expansion: Percentage of Initial Price Achieved definition: >- Percentage of Initial Price Achieved. This is the percetange change from the inital listing price to the final sales price provenance: verbatim note: TwentyCi's own text contains the misspellings "percetange" and "inital"; left uncorrected. - term: Postcode definition: >- A UK postcode is like a special address for a specific area, helping mail and packages get to the right place. It's a combination of letters and numbers, like a secret code for locations. The outcode is the first part, telling you the general area, while the incode is more specific, like the exact street or building in that area. provenance: verbatim - term: PCD expansion: Predicted to Complete Date definition: >- Predicted to Complete Date, is modelled date where an accurate estimatation of when a property is liekly to complete it's sale based on various factors within the housing market. provenance: verbatim note: TwentyCi's own text contains the misspellings "estimatation" and "liekly"; left uncorrected. - term: JSON expansion: JavaScript Object Notation definition: >- JavaScript Object Notation, is like a digital translator that helps different programs share information by presenting it in a universally understandable and easy-to-read format. provenance: verbatim - term: SSTC expansion: Sold Subject to Contract definition: >- Sold Subject to Contract means that an offer has been accepted by the seller, but the sale is not yet legally finalized, and certain conditions still need to be met before completion. provenance: verbatim - term: Street View definition: >- Google Street View is a technology featured in Google Maps and Google Earth that provides interactive panoramas from positions along many streets in the world. By using specific lines of code, specific photos of property and area can be called given the user an experience to know what the area looks like from their device. provenance: verbatim - term: UPRN expansion: Unique Property Reference Number definition: >- An Unique Property Reference Number, is like a digital fingerprint for a property, providing a distinct and reliable way to identify and locate it. provenance: verbatim - term: URI expansion: Uniform Resource Identifier definition: >- An Uniform Resource Identifier is like an address for resources on the internet, such as web pages or files. It's a string of characters that uniquely identifies a particular resource, allowing you to access it using a web browser or other software. provenance: verbatim - term: URL expansion: Uniform Resource Locator definition: >- An Uniform Resource Locator is a specific type of URI that provides the address for accessing resources on the internet, like web pages or files, often starting with "http://" or "https://". It's what you type into a web browser to visit a website. provenance: verbatim usage_in_api: method: derived source: openapi/twentyci-twentyapi-openapi.json note: Where each glossary term is actually load-bearing in the harvested contract. bindings: - term: UPRN role: primary resource identifier surfaces: - GET /properties/{uprn} - GET /properties/{uprn}/plannings - GET /properties/{uprn}/floor-plans - GET /{uprn}/likely-to-sell - GET /properties/{property}/transactions note: >- TwentyAPI is UPRN-keyed rather than keyed on any MLS or RESO identifier. The UK has no MLS and no RESO regime; the UPRN is the Ordnance Survey / GeoPlace national property key. - term: AVM role: valuation product surfaces: - POST /propertiesavm2/{property} - POST /properties/area-value-price - GET /properties - term: SSTC role: transaction-state metric surfaces: - GET /agent-performance/rankings/sstc - GET /agent-performance/brand/sstc - GET /agent-performance/rankings/days-to-sstc - GET /agent-performance/brand/days-to-sstc - GET /market/initial-metrics - term: PIPA role: agent-performance metric surfaces: - GET /agent-performance/rankings/percentage-of-initial-price-achieved - GET /agent-performance/brand/percentage-of-initial-price-achieved - GET /agent-performance/brand/initial-price-achieve - term: PCD role: market metric surfaces: - GET /market/initial-metrics - term: Postcode role: search key surfaces: - POST /properties/area-search - POST /properties/postcode-search - POST /properties/area-value-price - GET /nearby-places/schools - term: Street View role: media reference surfaces: - GET /properties/{property}/image absent_terms: note: >- Searched across the full 66-node, 247,074-byte documentation corpus and found zero matches. Recorded because their absence characterises the UK market position. terms: [RESO, MLS, IDX, VOW, OData, Data Dictionary, Universal Property Identifier, UPI]