LoopNet

LoopNet is the leading commercial real estate marketplace, owned by CoStar Group, offering access to property listings, sale comparables, lease rates, market analytics, and CRE investment data. Brokers, owners, and investors use LoopNet to market and discover office, retail, industrial, multifamily, land, and hospitality properties across the US, Canada, and the UK. Integration is available via LoopLink for embedding property search on third-party websites, and data access for enterprise clients is arranged through CoStar Group agreements.

LoopNet is listed with 1 API on the APIs.io network. Tagged areas include Commercial Real Estate, Property Listings, CRE, Real Estate, and Market Analytics.

LoopNet’s developer surface includes documentation, engineering blog, pricing, and 9 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

12.2/100 emerging ▬ flat Agent 1/100 human only Heartbeat 0/100 dormant saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessPaid

1 API

Commercial Real Estate Property Listings CRE Real Estate Market AnalyticsCoStarLease RatesSale Comparables

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 12.2/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 2.0 / 17

Access Clarity 2.5 / 17

Operational Transparency 2.1 / 11

Contract Governance 0.0 / 10

Discoverability 5.6 / 9

Regulatory Posture 0.0 / 15

Agent readiness — 1/100 · 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 7 / 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

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document Ask about this →
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey) Ask about this →
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) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →

12 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 0.0 — up to +25.0 composite points Ask about this →
Developer Ergonomics scores 11.9 — up to +17.6 composite points Ask about this →
Access Clarity scores 14.9 — up to +17.0 composite points Ask about this →

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.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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/loopnet/apis.yml: open an issue on github.com/api-evangelist/loopnet 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 →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

LoopNet Listings API

Access commercial real estate property listings including office, retail, industrial, multifamily, land, and hospitality properties for sale and lease across the US, Canada, and...

LoopNet API pricing

Not yet checked against LoopNet's own pricing page. Compiled by API Evangelist; confirm before you rely on a figure.

Plan	Price
Silver Listing Plan	—
Platinum Listing Plan	—
Diamond Listing Plan	—
LoopLink Integration	—
Enterprise Data Access	—

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

LoopNet Plans Pricing

5 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

LoopNet Rate Limits

0 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

LoopNet Finops

FINOPS

Security Posture 1

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

LoopNet Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrg

GitHubOrg

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

StatusPage

StatusPage

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Source (apis.yml)

aid: loopnet
name: LoopNet
description: LoopNet is the leading commercial real estate marketplace, owned by CoStar Group, offering access to property
  listings, sale comparables, lease rates, market analytics, and CRE investment data. Brokers, owners, and investors use LoopNet
  to market and discover office, retail, industrial, multifamily, land, and hospitality properties across the US, Canada,
  and the UK. Integration is available via LoopLink for embedding property search on third-party websites, and data access
  for enterprise clients is arranged through CoStar Group agreements.
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: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/loopnet.png
url: https://raw.githubusercontent.com/api-evangelist/loopnet/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.23'
tags:
- Commercial Real Estate
- Property Listings
- CRE
- Real Estate
- Market Analytics
- CoStar
- Lease Rates
- Sale Comparables
tags_raw:
- Commercial Real Estate
- Property Listings
- CRE
- Real Estate
- Market Analytics
- CoStar
- Lease Rates
- Sale Comparables
- Real-Estate
apis:
- aid: loopnet:loopnet-listings-api
  name: LoopNet Listings API
  description: Access commercial real estate property listings including office, retail, industrial, multifamily, land, and
    hospitality properties for sale and lease across the US, Canada, and UK. Data includes property details, lease rates,
    sale prices, cap rates, NOI, building class, square footage, zoning, broker information, and geolocation coordinates.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.loopnet.com/solutions/
  baseURL: https://api.loopnet.com
  tags:
  - Commercial Real Estate
  - Property Listings
  - Lease Rates
  - Sale Comparables
  - Market Data
  properties:
  - type: Documentation
    url: https://www.loopnet.com/solutions/
  - type: Website
    url: https://www.loopnet.com/
common:
- type: DomainSecurity
  url: security/loopnet-domain-security.yml
- type: Website
  url: https://www.loopnet.com/
- type: Documentation
  url: https://www.loopnet.com/solutions/
- type: GitHubOrg
  url: https://github.com/loopnet
- type: LinkedIn
  url: https://www.linkedin.com/company/loopnet
- type: Blog
  url: https://www.loopnet.com/learn/
- type: Pricing
  url: https://www.loopnet.com/solutions/ad-packages/silver-listing-plan
- type: StatusPage
  url: https://loopservice.statuspage.io/
- type: X
  url: https://x.com/loopnet
- type: Plans
  url: plans/loopnet-plans-pricing.yml
- type: RateLimits
  url: rate-limits/loopnet-rate-limits.yml
- type: FinOps
  url: finops/loopnet-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

LoopNet API — frequently asked questions

Does LoopNet have an API?

Yes. APIs.io lists 1 API from LoopNet, including LoopNet Listings API.

How much does the LoopNet API cost?

APIs.io lists 5 pricing plans for LoopNet, with each plan's price, limits and inclusions under Pricing on this page.

Is the LoopNet API ready for AI agents?

LoopNet has a Kin Score of 12.2 out of 100 (emerging) and an Agent Readiness score of 0.6 (human-only), scored by API Evangelist on 2026-11-13.

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