TopKey

TopKey is an AI-powered financial operating system purpose-built for professional short-term rental, vacation rental, and long-term rental property managers running 50-5,000+ units. It automates property-level and owner-level expense management, corporate and bring-your-own cards (BYOC), bill pay / AP, banking through partner banks (Thread Bank, Member FDIC), AI-assisted accounting, inventory, invoicing, work-order expense tracking, and revenue reconciliation. TopKey integrates deeply with property management systems (Guesty, Hostaway, OwnerRez, Streamline, Track, Hostfully) and accounting software (QuickBooks Online, Xero, Sage Intacct, Oracle NetSuite). Backed by a16z and Felicis. TopKey consumes partner APIs for its integrations but does not publish a public developer API or OpenAPI at this time; it ships a product help center and a machine-readable llms.txt.

TopKey is profiled on the APIs.io network. Tagged areas include Company, Fintech, Expense Management, Property Management, and Accounting.

TopKey’s developer surface includes documentation, engineering blog, support, and 6 more developer resources.

🌐 Visit website 📡 Source on GitHub
12.6/100 emerging ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-08-21 · rubric v0.12.0
0 APIs
CompanyFintechExpense ManagementProperty ManagementAccountingShort-Term RentalsVacation RentalsBankingBill PayCorporate Cards

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-21 · rubric v0.12.0
Composite quality — 12.6/100 · emerging
Contract Quality 0.0 / 21
Developer Ergonomics 2.8 / 17
Access Clarity 4.7 / 17
Operational Transparency 0.0 / 11
Contract Governance 0.0 / 10
Discoverability 4.9 / 9
Regulatory Posture 2.7 / 15
Agent readiness — 0/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
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
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Regulatory Posture applies to this provider. Its tags matched the Banking & Open Finance regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.
The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
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/topkey: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Topkey Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Login
Login

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt

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)

apis.yml Raw ↑ 
aid: topkey
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/topkey.png
name: TopKey
description: TopKey is an AI-powered financial operating system purpose-built for professional short-term rental, vacation
  rental, and long-term rental property managers running 50-5,000+ units. It automates property-level and owner-level expense
  management, corporate and bring-your-own cards (BYOC), bill pay / AP, banking through partner banks (Thread Bank, Member
  FDIC), AI-assisted accounting, inventory, invoicing, work-order expense tracking, and revenue reconciliation. TopKey integrates
  deeply with property management systems (Guesty, Hostaway, OwnerRez, Streamline, Track, Hostfully) and accounting software
  (QuickBooks Online, Xero, Sage Intacct, Oracle NetSuite). Backed by a16z and Felicis. TopKey consumes partner APIs for its
  integrations but does not publish a public developer API or OpenAPI at this time; it ships a product help center and a machine-readable
  llms.txt.
url: https://raw.githubusercontent.com/api-evangelist/topkey/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
- felicis
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Fintech
- Expense Management
- Property Management
- Accounting
- Short-Term Rentals
- Vacation Rentals
- Banking
- Bill Pay
- Corporate Cards
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://topkey.io
- type: Documentation
  url: https://docs.topkey.io
- type: Blog
  url: https://topkey.io/blog
- type: Login
  url: https://app.topkey.io/users/sign_in
- type: Support
  url: mailto:support@topkey.io
- type: TermsOfService
  url: https://topkey.io/legal/terms-of-service
- type: PrivacyPolicy
  url: https://topkey.io/legal/privacy-policy
- type: LLMsTxt
  url: llms/topkey-llms.txt
- type: DomainSecurity
  url: security/topkey-domain-security.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 2
  pass: local-v1

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