Avenue One website screenshot

Avenue One

Avenue One is a New York-based technology service platform and investment marketplace for institutional owners, buyers, sellers, lenders and borrowers of residential rental real estate. Founded in 2020, it connects institutional debt and equity capital to local operating partners and property owners across 21+ U.S. markets, combining proprietary property data, automated valuation, and a vetted partner network to find, finance, buy, renovate, lease, manage and sell single-family rental homes at scale. Its service lines span lending (bridge and SFR portfolio loans), strategy development, acquisitions, renovations, asset management, title and brokerage or dispositions. The company reports $2.2B+ of capital deployed. Its software runs as a private, login-gated product suite ("AvenueOS") for internal, builder, investor and partner users; no public developer program, API reference, or machine-readable contract is published.

Avenue One is profiled on the APIs.io network. Tagged areas include Company, Real Estate, Single-Family Rental, PropTech, and Institutional Investing.

Avenue One’s developer surface includes support and 11 more developer resources.

12.0/100 emerging ▬ flat Agent 15/100 agent aware Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →
0 APIs
CompanyReal EstateSingle-Family RentalPropTechInstitutional InvestingLendingAsset ManagementProperty DataMarketplace

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0
Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) 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.
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.
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/.
Show this score on your site. Kin Score badge preview for Avenue One It updates itself when the score changes. Paste this where you link to your API docs:
<a href="https://apis.io/providers/avenue-one/"><img src="https://apis.io/badge/avenue-one/card.svg" alt="Avenue One on APIs.io — Kin Score by API Evangelist"></a>
Other styles, a README pill and a shields.io endpoint are on the badge page.
Raise your score.
Agent readiness — checks not met, largest first (exact, from this profile):
  • Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
  • MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
  • Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
  • Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
  • Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
  • A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
10 more unmet checks in the Agent Readiness table above.
Kin Score — facets with the most composite points still available (weight × headroom):
Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/avenue-one/apis.yml: open an issue on github.com/api-evangelist/avenue-one to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

MarketPositionDepthRegistered MCP serverDeclares compatibility
Consumer Lending Licensing (UK, US, Canada credit licence registers) undeclared - - -

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

measured — observed by APIs.io (published)

Security Posture 2

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

Avenue One Authentication

1 scheme

SECURITY

Avenue One Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

Access & Security 1

Authentication, authorization, and security posture

Operate 1

Status, limits, changes, and where to get help

Commercial 2

Pricing, plans, and the legal terms of use

Company 3

The organization behind the API

Other 2

Properties that don't map to a standard resource type

Source (apis.yml)

apis.yml Raw ↑
aid: avenue-one
name: Avenue One
description: Avenue One is a New York-based technology service platform and investment marketplace for institutional owners,
  buyers, sellers, lenders and borrowers of residential rental real estate. Founded in 2020, it connects institutional debt
  and equity capital to local operating partners and property owners across 21+ U.S. markets, combining proprietary property
  data, automated valuation, and a vetted partner network to find, finance, buy, renovate, lease, manage and sell single-family
  rental homes at scale. Its service lines span lending (bridge and SFR portfolio loans), strategy development, acquisitions,
  renovations, asset management, title and brokerage or dispositions. The company reports $2.2B+ of capital deployed. Its
  software runs as a private, login-gated product suite ("AvenueOS") for internal, builder, investor and partner users; no
  public developer program, API reference, or machine-readable contract is published.
url: https://raw.githubusercontent.com/api-evangelist/avenue-one/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  probe_state: none
  source:
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://avenueone.com/_assets/Avenue_One_Horizontal_Logo_Digital_FullColor_1-b0ddb1c50f.svg
x-type: company
x-source: harvest:secondary-market
x-tier: stub
x-tier-reason: harvest
specificationVersion: '0.23'
created: '2026-08-06'
modified: '2026-08-06'
tags:
- Company
- Real Estate
- Single-Family Rental
- PropTech
- Institutional Investing
- Lending
- Asset Management
- Property Data
- Marketplace
tags_raw:
- Company
- Real Estate
- Single-Family Rental
- PropTech
- Institutional Investing
- Lending
- Asset Management
- Property Data
- Marketplace
- Real-Estate
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/avenue-one-domain-security.yml
- type: Website
  url: https://avenueone.com/
- type: Support
  url: https://avenueone.com/contact-us
- type: TermsOfService
  url: https://avenueone.com/terms-of-use
- type: PrivacyPolicy
  url: https://avenueone.com/terms
- type: Login
  url: https://partners.avenueone.com/
- type: LinkedIn
  url: https://www.linkedin.com/company/avenue1/
- type: Careers
  url: https://avenueone.com/careers
- type: SecondaryMarket
  url: https://forgeglobal.com/avenue-one_stock/
- type: LLMsTxt
  url: llms/avenue-one-llms.txt
- type: WellKnownIndex
  url: well-known/avenue-one-well-known.yml
- type: IdentityProvider
  url: authentication/avenue-one-authentication.yml
x-enrichment-note: The well-known/ and authentication/ artifacts are deliberately NOT wired as the canonical WellKnown / Authentication
  pointers the rating reads. Both document Avenue One's Auth0 human-login tenant, not a developer authentication model or
  an API discovery surface, and crediting them would award API-quality points to a company that publishes no API. See x-coverage.
x-enrichment:
  date: '2026-08-06'
  status: minimal
  artifacts_added: 5
  pass: local-v1
x-coverage:
  state: none
  reason: no-developer-program
  detail: Avenue One ships AvenueOS only as a login-gated product to institutional clients and vetted partners — partners.avenueone.com
    302s straight to an Auth0 universal login, and the AvenueOS backend at api.credit.avenueone.com answers every docs path
    (/docs, /redoc, /openapi.json, /api/openapi.json) identically to a control path, so no OpenAPI, SDK, webhook or developer
    portal exists to profile.
  evidence:
  - url: https://api.credit.avenueone.com/api/openapi.json
    status: 404
  - url: https://api.credit.avenueone.com/openapi.json
    status: 404
  - url: https://partners.avenueone.com/
    status: 302
  - url: https://avenueone.com/.well-known/agent-card.json
    status: 403
  checked: '2026-08-06'

Avenue One API — frequently asked questions

How do I authenticate with the Avenue One API?

Avenue One documents its authentication (1 scheme). The details are profiled on APIs.io as Avenue One Authentication.

Is the Avenue One API ready for AI agents?

Avenue One has a Kin Score of 12.0 out of 100 (emerging) and an Agent Readiness score of 15.1 (agent-aware), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this
  • find_providersBrowse and filter every provider in the catalog.
  • get_provider_artifactsEvery artifact this provider publishes, grouped by type.
  • get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
  • get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
  • get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
  • get_provider_ratingPRO — composite, band, trend and facet scores.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This provider
curl "https://apis.io/api/v1/providers/avenue-one"
All providers
curl "https://apis.io/api/v1/providers?limit=25"
Every operation they expose
curl "https://apis.io/api/v1/providers/avenue-one/operations?limit=25"
How their score was established
curl "https://apis.io/api/v1/providers/avenue-one/evidence"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

A second provider on the same verified email joins the account you already have.