Apex27
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.
Limited machine-readable signal and partial portal coverage — documentation a human can read, but little a machine or agent can consume without scraping.
API Evangelist profiles Apex27 the way a machine reads it — 39 machine-readable artifacts across 2 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Apex27 scores 32.3/100 (thin), with a separate agent-readiness read of 22/100 (agent aware). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
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How we profile Apex27
Each block below is one kind of artifact we hold for Apex27. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 33
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
Apex27 Availability API
Appointment availability for valuations and viewings.
Apex27 Branches API
Agency branches within the tenant.
Apex27 Call Logs API
Telephone activity recorded against a contact.
Apex27 Client Portal API
Client-portal authentication and sign-in links.
Apex27 Completions API
Sales completions and progression.
Apex27 Contact Orders API
Orders placed against a contact.
Apex27 Contact Referrals API
Referrals raised against a contact (conveyancing, mortgage, survey).
Apex27 Contacts API
Applicants, vendors, landlords, tenants and buyers held in the CRM.
Apex27 Documents API
Documents attached to listings or contacts.
Apex27 Enquiries API
Website enquiries and valuation requests.
Apex27 Favourites API
Saved listings for a portal contact.
Apex27 Global Search API
Cross-entity search.
Apex27 Inspections API
Property inspections (lettings management).
Apex27 Leads API
Inbound leads and their pipeline status.
Apex27 Listing Issues API
Maintenance issues raised against a listing.
Apex27 Listing Keys API
Key sets held for a listing, including check-out and check-in.
Apex27 Listing Links API
Virtual tours, videos, EPC reports and brochure links on a listing.
Apex27 Listing Media API
Images, EPCs, floorplans, brochures and videos on a listing.
Apex27 Listing Rooms API
Room-by-room detail on a listing.
Apex27 Listing Searches API
Saved applicant listing searches used for matching and alerts.
Apex27 Listings API
Sales, lettings, land and commercial property records.
Apex27 Notes API
Free-text notes attached to a contact or a listing.
Apex27 Notifications API
In-app notifications to users, branches, listings or contacts.
Apex27 Offers API
Offers made against listings.
Apex27 Onboarding Checks API
Compliance and onboarding checklists on a listing.
Apex27 Search Regions API
Named geographic search regions.
Apex27 Statistics API
Portal inventory statistics.
Apex27 Tasks API
Work items assigned to users.
Apex27 Tenancies API
Tenancy agreements and their lifecycle.
Apex27 Users API
CRM users within the tenant.
Apex27 Valuations API
Market appraisals and valuation appointments.
Apex27 Viewings API
Viewing appointments.
Apex27 Webhooks API
Webhook subscription management.
Scroll within the panel for all 33 ·
Open Collections 2
Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
Apex27 CRM API
OPEN COLLECTIONApex27 Portal API
OPEN COLLECTIONEvent Specifications 1
Not every API is request/response. AsyncAPI describes the event-driven and streaming side — the webhooks and channels — so the asynchronous half of the interface is documented the same way the synchronous half is.
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Apex27 Webhooks
ASYNCAPISecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.
Recommended x-agentic-access execution contracts for AI agents.
Resources
Every other property we hold for Apex27 — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 1
Portal, sign-up, and the first successful call
Agent Surfaces 4
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 7
Pagination, idempotency, versioning, errors, and events
Scroll within the panel for all 7 ·
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Operate 3
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
Other 3
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/apex27 · machine-readable index on apis.io
This is an independent, third-party profile of Apex27, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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