flatfair

flatfair is a UK-based tenancy deposit platform for letting agents, landlords, and Build-to-Rent operators, offering deposit alternatives and deposit administration products. Its products include No Deposit (tenants pay 28% of one month's rent plus VAT instead of a five-week cash deposit), Deposits, Unlock Deposits, Deposit Boost, tenant Referencing, and Tenant Guarantor. flatfair is used by more than 850 agents and Build-to-Rent operators to reduce move-in friction and cut deposit administration time by around 60 minutes per tenancy. The company operates a web application for agents and tenants but does not publish a public developer API, SDK, or developer portal.

flatfair is profiled on the APIs.io network. Tagged areas include Company, Fintech, PropTech, Rental, and Deposits.

flatfair’s developer surface includes support, engineering blog, and 5 more developer resources.

🌐 Visit website 📡 Source on GitHub

14.9/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyFintechPropTechRentalDepositsTenancyReal EstateUnited Kingdom

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 14.9/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 1.3 / 20

Commercial Clarity 6.8 / 20

Operational Transparency 0.0 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/flatfair: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Get Started 1

Portal, sign-up, and the first successful call

Login

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: flatfair
name: flatfair
description: flatfair is a UK-based tenancy deposit platform for letting agents, landlords, and Build-to-Rent operators, offering
  deposit alternatives and deposit administration products. Its products include No Deposit (tenants pay 28% of one month's
  rent plus VAT instead of a five-week cash deposit), Deposits, Unlock Deposits, Deposit Boost, tenant Referencing, and Tenant
  Guarantor. flatfair is used by more than 850 agents and Build-to-Rent operators to reduce move-in friction and cut deposit
  administration time by around 60 minutes per tenancy. The company operates a web application for agents and tenants but
  does not publish a public developer API, SDK, or developer portal.
url: https://raw.githubusercontent.com/api-evangelist/flatfair/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- index-ventures
x-tier: stub
x-tier-reason: portfolio-lead
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
image: https://www.flatfair.co.uk/hubfs/website-theme/flatfair_logo.svg
tags:
- Company
- Fintech
- PropTech
- Rental
- Deposits
- Tenancy
- Real Estate
- United Kingdom
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/flatfair-domain-security.yml
- type: Website
  url: https://flatfair.co.uk
- type: Support
  url: https://help.flatfair.co.uk/hc/en-gb
- type: Blog
  url: https://blog.flatfair.co.uk/
- type: TermsOfService
  url: https://flatfair.co.uk/terms-conditions/
- type: PrivacyPolicy
  url: https://flatfair.co.uk/privacy-policy/
- type: Login
  url: https://app.flatfair.co.uk/
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence