Apex27 Limited is a United Kingdom estate agency CRM vendor, founded in 2019 and headquartered in the UK, selling cloud software to sales, lettings and commercial agents for £35 per user per month. It sits in the middle of the UK residential value chain — between the agent and the portals — capturing leads, applicants, listings, viewings, valuations, offers, sales progression and tenancies, then syndicating listings out to Rightmove, Zoopla, OnTheMarket and others. Because the UK has no MLS and no cooperative listing database, that CRM seat is the only practical route a listing takes to market, and Apex27 is one of the private gatekeepers of it. Apex27 does operate two real HTTP APIs — the Apex27 CRM API at api.apex27.co.uk and a per-tenant Portal API that powers agency websites — but neither has a public developer portal. The documentation URL that Apex27's own published n8n node points at, docs.apex27.co.uk, returns 404, and every CRM endpoint returns 401 Unauthorised without a key issued inside a paid tenant. Access is customer-only, not self-serve. RESO does not apply — no RESO Web API or Data Dictionary certification exists for Apex27 or for the UK market at all, since RESO is a NAR/MLS construct with no UK counterpart. Apex27 publishes no open data; the UK's open property layer belongs to HM Land Registry and Ordnance Survey, not to the CRM vendors.
Apex27 publishes 2 APIs on the APIs.io network: CRM API and Portal API. Tagged areas include Real Estate, United Kingdom, PropTech, Property Listings, and CRM.
The Apex27 catalog on APIs.io includes 1 event-driven AsyncAPI specification.
Apex27’s developer surface includes authentication, signup flow, pricing, changelog, engineering blog, support, and 18 more developer resources.
The Apex27 CRM API is the vendor's REST interface over the estate agency CRM, covering contacts, leads, listings and their media, rooms, keys, notes, offers, viewings, valuation...
The Apex27 Portal API is the per-tenant, website-facing API that drives search and enquiry on Apex27-built agency websites. Its documented operations are get-listings, get-listi...
aid: apex27
url: https://raw.githubusercontent.com/api-evangelist/apex27/refs/heads/main/apis.yml
name: Apex27
kind: company
description: Apex27 Limited is a United Kingdom estate agency CRM vendor, founded in 2019 and headquartered in the UK, selling
cloud software to sales, lettings and commercial agents for £35 per user per month. It sits in the middle of the UK residential
value chain — between the agent and the portals — capturing leads, applicants, listings, viewings, valuations, offers, sales
progression and tenancies, then syndicating listings out to Rightmove, Zoopla, OnTheMarket and others. Because the UK has
no MLS and no cooperative listing database, that CRM seat is the only practical route a listing takes to market, and Apex27
is one of the private gatekeepers of it. Apex27 does operate two real HTTP APIs — the Apex27 CRM API at api.apex27.co.uk
and a per-tenant Portal API that powers agency websites — but neither has a public developer portal. The documentation URL
that Apex27's own published n8n node points at, docs.apex27.co.uk, returns 404, and every CRM endpoint returns 401 Unauthorised
without a key issued inside a paid tenant. Access is customer-only, not self-serve. RESO does not apply — no RESO Web API
or Data Dictionary certification exists for Apex27 or for the UK market at all, since RESO is a NAR/MLS construct with no
UK counterpart. Apex27 publishes no open data; the UK's open property layer belongs to HM Land Registry and Ordnance Survey,
not to the CRM vendors.
image: https://apex27.co.uk/img/icon.png
tags:
- Real Estate
- United Kingdom
- PropTech
- Property Listings
- CRM
- Estate Agency
- Lettings
- Rentals
- Property Management
- Valuation
- Tenancy
- Conveyancing
created: '2026-07-26'
modified: '2026-07-26'
specificationVersion: '0.19'
apis:
- aid: apex27:apex27-crm-api
name: Apex27 CRM API
description: The Apex27 CRM API is the vendor's REST interface over the estate agency CRM, covering contacts, leads, listings
and their media, rooms, keys, notes, offers, viewings, valuations, inspections, issues and onboarding checks, plus branches,
users, tasks, documents, tenancies, completions, call logs, notifications, saved listing searches, search regions, global
search, client portal sign-in links and webhook subscriptions. It authenticates with an `x-api-key` request header and
paginates with `page` and `pageSize` (25-250). The host is live — every probed collection returned HTTP 401 Unauthorised
— but there is no public reference documentation; the documentation URL declared in Apex27's own published n8n credential
(https://docs.apex27.co.uk) returned HTTP 404 on 2026-07-26. Keys are issued to paying customers inside the CRM admin
panel, so this is a customer-only surface, not a self-serve developer API.
humanURL: https://apex27.co.uk/integration/n8n
baseURL: https://api.apex27.co.uk
tags:
- Real Estate
- CRM
- Property Listings
- Lettings
- Tenancy
- United Kingdom
properties:
- type: Documentation
url: https://apex27.co.uk/integration/n8n
- type: Integrations
url: https://apex27.co.uk/integrations
- type: Node
url: https://www.npmjs.com/package/n8n-nodes-apex27crm
- type: SignUp
url: https://apex27.co.uk/estate-agent-software-sign-up
- type: OpenAPI
url: openapi/apex27-crm-api-openapi.yml
name: API Evangelist derived OpenAPI 3.1 (not provider-published)
- type: Overlay
url: overlays/apex27-crm-api-overlay.yaml
name: API Evangelist overlay
- aid: apex27:apex27-portal-api
name: Apex27 Portal API
description: The Apex27 Portal API is the per-tenant, website-facing API that drives search and enquiry on Apex27-built
agency websites. Its documented operations are get-listings, get-listing, get-search-options, get-statistics, contact,
request-valuation, add-favourite and remove-favourite, spanning sales, lettings and land inventory with sort and filter
options. It has no shared host — the base URL is the agency's own portal domain with /api appended (the vendor's published
credential uses the placeholder https://portal-abcd1234.apex27.co.uk/api) — and it authenticates with an `api_key` query-string
parameter issued under Admin Panel > Websites > [Your Website] > Integrations. No public documentation page for it was
found.
humanURL: https://apex27.co.uk/websites
tags:
- Real Estate
- Property Listings
- Property Search
- Valuation
- United Kingdom
properties:
- type: Documentation
url: https://apex27.co.uk/websites
- type: Node
url: https://www.npmjs.com/package/n8n-nodes-apex27portal
- type: OpenAPI
url: openapi/apex27-portal-api-openapi.yml
name: API Evangelist derived OpenAPI 3.1 (not provider-published)
- type: Overlay
url: overlays/apex27-portal-api-overlay.yaml
name: API Evangelist overlay
baseURL: https://portal-abcd1234.apex27.co.uk/api
common:
- type: AgenticAccess
url: agentic-access/apex27-agentic-access.yml
- type: DomainSecurity
url: security/apex27-domain-security.yml
- type: Authentication
url: authentication/apex27-authentication.yml
- type: Website
url: https://apex27.co.uk/
- type: SignUp
url: https://apex27.co.uk/estate-agent-software-sign-up
- type: Pricing
url: https://apex27.co.uk/estate-agent-software-pricing
- type: Features
url: https://apex27.co.uk/estate-agent-software-features
- type: Integrations
url: https://apex27.co.uk/integrations
- type: ChangeLog
url: https://apex27.co.uk/crm-changelog
- type: Blog
url: https://apex27.co.uk/estate-agency-blog
- type: Support
url: https://apex27.co.uk/contact-apex27
- type: TermsOfService
url: https://apex27.co.uk/terms-of-use
- type: PrivacyPolicy
url: https://apex27.co.uk/privacy-policy
- type: AcceptableUsePolicy
url: https://apex27.co.uk/acceptable-use-policy
name: Acceptable Use Policy
- type: LinkedIn
url: https://www.linkedin.com/company/apex27
- type: Packages
url: packages/apex27-packages.yml
name: Client libraries published by Apex27
- type: LLMsTxt
url: llms/apex27-llms.txt
name: llms.txt for Apex27
- type: Conformance
url: conformance/apex27-conformance.yml
name: Standards conformance assessment
- type: ErrorCatalog
url: errors/apex27-problem-types.yml
name: Observed error catalog
- type: Lifecycle
url: lifecycle/apex27-lifecycle.yml
name: Versioning, deprecation, SLA and status posture
- type: Conventions
url: conventions/apex27-conventions.yml
name: Cross-cutting API conventions
- type: ChangeLog
url: changelog/apex27-changelog.yml
name: Structured CRM changelog
- type: DataModel
url: data-model/apex27-data-model.yml
name: Derived entity-relationship model
- type: Vocabulary
url: vocabulary/apex27-vocabulary.yml
name: Controlled vocabularies accepted on the wire
- type: Webhooks
url: asyncapi/apex27-webhooks.yml
name: Webhook subscription surface
- type: AgentSkill
url: skills/_index.yml
name: Packaged agent skills for the marquee Apex27 flows
maintainers:
- FN: Kin Lane
email: kin@apievangelist.com
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