Perchwell

Perchwell is a modern, unified MLS (Multiple Listing Service) technology platform used by MLS organizations, brokerages, and real estate agents across the United States. Founded in 2015 and headquartered in New York City, Perchwell provides search, client collaboration, listing add/edit, branded reports, and market analytics on a cloud-native, RESO-certified foundation. For developers and data partners, Perchwell operates three real estate data APIs: a simple token-authenticated JSON API for listing feeds, a RESO Data Dictionary certified RESO Web API (OData 4.01) exposing the standard Property, Member, Office, OpenHouse, and Media resources with full read/write support, and a legacy RETS 1.7 server for backward compatibility. Customers include CRMLS, Baldwin REALTORS, Engel & Volkers, and Keller Williams. Perchwell is SOC 2 compliant and backed by Lux Capital, Founders Fund, and Starwood Capital.

Perchwell publishes 8 API contracts indexed on the APIs.io network, including Listings API, Media API, Member API, and 5 more. Tagged areas include Company, Real Estate, MLS, Listings, and Property Data.

The Perchwell catalog on APIs.io includes 1 Spectral governance ruleset.

Perchwell’s developer surface includes documentation, API reference, getting-started guide, engineering blog, support, authentication, and 21 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

36.3/100 thin ▬ flat Agent 23/100 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 →

2 published contracts 3 Agent Skills

Company Real Estate MLS Listings Property Data RESO RETS OData Real Estate Data

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Real Estate Brokerage Management

BC-4960

ListingsMediaOpenHouseProperty

POST /Property POST /OpenHouse

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 36.3/100 · thin

Contract Quality 9.1 / 19

Developer Ergonomics 3.1 / 15

Access Clarity 5.3 / 15

Operational Transparency 0.3 / 10

Contract Governance 2.9 / 9

Discoverability 5.5 / 8

Regulatory Posture 4.4 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 23/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)

7 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 20.8 — up to +15.8 composite points
Contract Quality scores 48.6 — up to +12.9 composite points
Access Clarity scores 35.5 — up to +12.9 composite points

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

Standards implemented 3

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.

OData

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

RETS

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

OpenAPI

measured — observed by APIs.io (published)

APIs 8

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

Perchwell RETS API

Legacy RETS 1.7 server (DMQL2 query language) providing backward compatibility for RETS clients, exposing Listing, Agent, Brokerage, Office, and OpenHouse resources via the Sear...

Perchwell Listings API

Real estate sale and rental listing feed.

Perchwell Media API

RESO Media resource (nested within Property).

Perchwell Member API

RESO Member resource (agents).

Perchwell Metadata API

OData service metadata.

Perchwell Office API

RESO Office resource.

Perchwell OpenHouse API

RESO OpenHouse resource.

Perchwell Property API

RESO Property resource (listings; Media is nested).

Scroll for all 8

Open Collections 7

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Perchwell JSON Listings API

OPEN COLLECTION

Perchwell JSON Listings Media API

OPEN COLLECTION

Perchwell JSON Listings Member API

OPEN COLLECTION

Perchwell JSON Listings Metadata API

OPEN COLLECTION

Perchwell JSON Listings Office API

OPEN COLLECTION

Perchwell JSON Listings OpenHouse API

OPEN COLLECTION

Perchwell JSON Listings Property API

OPEN COLLECTION

Scroll for all 7

Agent Skills 3

Packaged agent skills for driving this provider's APIs from an AI assistant.

Publish a listing to the RESO Web API

AGENT SKILL

Search and read RESO Property records

AGENT SKILL

Sync real estate listings from Perchwell

AGENT SKILL

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Perchwell API Rules

63 rules · 59 errors 1 warnings 3 info

SPECTRAL

OpenAPI Overlays 2

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Perchwell Json Api Overlay

2 actions · update · perchwell-json-api-openapi.yml

DERIVED

Perchwell Reso Web Api Overlay

1 action · update · perchwell-reso-web-api-openapi.yml

DERIVED

Security Posture 2

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

Perchwell Authentication

apiKey/http · 3 schemes

SECURITY

Perchwell Domain Security

TLSv1.2 · HSTS · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Perchwell Agentic Access

18 operations · 8 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LLMsTxt

LLMsTxt

X-MCPServerCandidate

X-MCPServerCandidate

AgentSkill

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

Conformance

DataModel

Lifecycle

ErrorCatalog

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

Authentication

Authentication

Compliance

Compliance

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support

Support

HelpCenter

HelpCenter

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

Other 3

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Overlay

Overlay

Overlay

Overlay

Source (apis.yml)

x-docs-platform: gitbook
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-04
x-docs-hosting: aws-cloudfront
x-enrichment:
  date: '2026-07-20'
  status: minimal
  artifacts_added: 0
  pass: local-v1
aid: perchwell
name: Perchwell
description: 'Perchwell is a modern, unified MLS (Multiple Listing Service) technology platform used by MLS organizations,
  brokerages, and real estate agents across the United States. Founded in 2015 and headquartered in New York City, Perchwell
  provides search, client collaboration, listing add/edit, branded reports, and market analytics on a cloud-native, RESO-certified
  foundation. For developers and data partners, Perchwell operates three real estate data APIs: a simple token-authenticated
  JSON API for listing feeds, a RESO Data Dictionary certified RESO Web API (OData 4.01) exposing the standard Property, Member,
  Office, OpenHouse, and Media resources with full read/write support, and a legacy RETS 1.7 server for backward compatibility.
  Customers include CRMLS, Baldwin REALTORS, Engel & Volkers, and Keller Williams. Perchwell is SOC 2 compliant and backed
  by Lux Capital, Founders Fund, and Starwood Capital.'
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://perchwell.com/_media/favicon.ico
url: https://raw.githubusercontent.com/api-evangelist/perchwell/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- lux-capital
- founders-fund
- starwood-capital
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Real Estate
- MLS
- Listings
- Property Data
- RESO
- RETS
- OData
- Real Estate Data
tags_raw:
- Company
- Real Estate
- MLS
- Listings
- Property Data
- RESO
- RETS
- OData
- Real Estate Data
- Real-Estate
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- name: Perchwell RETS API
  description: Legacy RETS 1.7 server (DMQL2 query language) providing backward compatibility for RETS clients, exposing Listing,
    Agent, Brokerage, Office, and OpenHouse resources via the Search and GetMetadata transactions.
  humanURL: https://docs.perchwell.com/#/rets_getting_started
  baseURL: http://rets.perchwell.com:6103
  properties:
  - type: GettingStarted
    url: https://docs.perchwell.com/#/rets_getting_started
- aid: perchwell:perchwell-listings-api
  name: Perchwell Listings API
  description: Real estate sale and rental listing feed.
  humanURL: https://docs.perchwell.com/#/json_api_getting_started
  baseURL: https://www.perchwell.com/api/feeds
  tags:
  - Listings
  properties:
  - type: OpenAPI
    url: openapi/perchwell-listings-api-openapi.yml
  - type: GettingStarted
    url: https://docs.perchwell.com/#/json_api_getting_started
  - type: GettingStarted
    url: https://docs.perchwell.com/#/reso_getting_started
- aid: perchwell:perchwell-media-api
  name: Perchwell Media API
  description: RESO Media resource (nested within Property).
  humanURL: https://docs.perchwell.com/#/json_api_getting_started
  baseURL: https://www.perchwell.com/api/feeds
  tags:
  - Media
  properties:
  - type: OpenAPI
    url: openapi/perchwell-media-api-openapi.yml
  - type: GettingStarted
    url: https://docs.perchwell.com/#/json_api_getting_started
  - type: GettingStarted
    url: https://docs.perchwell.com/#/reso_getting_started
- aid: perchwell:perchwell-member-api
  name: Perchwell Member API
  description: RESO Member resource (agents).
  humanURL: https://docs.perchwell.com/#/json_api_getting_started
  baseURL: https://www.perchwell.com/api/feeds
  tags:
  - Member
  properties:
  - type: OpenAPI
    url: openapi/perchwell-member-api-openapi.yml
  - type: GettingStarted
    url: https://docs.perchwell.com/#/json_api_getting_started
  - type: GettingStarted
    url: https://docs.perchwell.com/#/reso_getting_started
- aid: perchwell:perchwell-metadata-api
  name: Perchwell Metadata API
  description: OData service metadata.
  humanURL: https://docs.perchwell.com/#/json_api_getting_started
  baseURL: https://www.perchwell.com/api/feeds
  tags:
  - Metadata
  properties:
  - type: OpenAPI
    url: openapi/perchwell-metadata-api-openapi.yml
  - type: GettingStarted
    url: https://docs.perchwell.com/#/json_api_getting_started
  - type: GettingStarted
    url: https://docs.perchwell.com/#/reso_getting_started
- aid: perchwell:perchwell-office-api
  name: Perchwell Office API
  description: RESO Office resource.
  humanURL: https://docs.perchwell.com/#/json_api_getting_started
  baseURL: https://www.perchwell.com/api/feeds
  tags:
  - Office
  properties:
  - type: OpenAPI
    url: openapi/perchwell-office-api-openapi.yml
  - type: GettingStarted
    url: https://docs.perchwell.com/#/json_api_getting_started
  - type: GettingStarted
    url: https://docs.perchwell.com/#/reso_getting_started
- aid: perchwell:perchwell-openhouse-api
  name: Perchwell OpenHouse API
  description: RESO OpenHouse resource.
  humanURL: https://docs.perchwell.com/#/json_api_getting_started
  baseURL: https://www.perchwell.com/api/feeds
  tags:
  - OpenHouse
  properties:
  - type: OpenAPI
    url: openapi/perchwell-openhouse-api-openapi.yml
  - type: GettingStarted
    url: https://docs.perchwell.com/#/json_api_getting_started
  - type: GettingStarted
    url: https://docs.perchwell.com/#/reso_getting_started
- aid: perchwell:perchwell-property-api
  name: Perchwell Property API
  description: RESO Property resource (listings; Media is nested).
  humanURL: https://docs.perchwell.com/#/json_api_getting_started
  baseURL: https://www.perchwell.com/api/feeds
  tags:
  - Property
  properties:
  - type: OpenAPI
    url: openapi/perchwell-property-api-openapi.yml
  - type: GettingStarted
    url: https://docs.perchwell.com/#/json_api_getting_started
  - type: GettingStarted
    url: https://docs.perchwell.com/#/reso_getting_started
common:
- type: CapabilityMap
  url: capabilities/perchwell-capability-edges.yml
  name: Perchwell Business Capability Map
- type: AgenticAccess
  url: agentic-access/perchwell-agentic-access.yml
- type: Website
  url: https://perchwell.com
- type: DeveloperPortal
  url: https://docs.perchwell.com
- type: Documentation
  url: https://docs.perchwell.com
- type: APIReference
  url: https://docs.perchwell.com
- type: GettingStarted
  url: https://docs.perchwell.com/#/json_api_getting_started
- type: Blog
  url: https://www.perchwell.com/blog
- type: Support
  url: mailto:support@perchwell.com
- type: GitHubOrganization
  url: https://github.com/perchwell
- type: TermsOfService
  url: https://www.perchwell.com/terms
- type: PrivacyPolicy
  url: https://www.perchwell.com/privacy-policy
- type: Login
  url: https://www.perchwell.com/accounts/sign_in
- type: HelpCenter
  url: http://support.perchwell.com/
- type: LLMsTxt
  url: llms/perchwell-llms.txt
- type: Authentication
  url: authentication/perchwell-authentication.yml
- type: Conventions
  url: conventions/perchwell-conventions.yml
- type: Conformance
  url: conformance/perchwell-conformance.yml
- type: Compliance
  url: conformance/perchwell-conformance.yml
- type: DataModel
  url: data-model/perchwell-data-model.yml
- type: Lifecycle
  url: lifecycle/perchwell-lifecycle.yml
- type: ErrorCatalog
  url: errors/perchwell-problem-types.yml
- type: X-MCPServerCandidate
  url: mcp/perchwell-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: AgentSkill
  url: skills/_index.yml
- type: Overlay
  url: overlays/perchwell-json-api-overlay.yaml
- type: Overlay
  url: overlays/perchwell-reso-web-api-overlay.yaml
- type: DomainSecurity
  url: security/perchwell-domain-security.yml

Perchwell API — frequently asked questions

Does Perchwell have an API?

Yes. APIs.io lists 8 APIs from Perchwell, including Perchwell RETS API, Perchwell Listings API and Perchwell Media API, and 5 more.

Is there an OpenAPI specification for the Perchwell API?

Yes. APIs.io indexes 7 OpenAPI specifications for Perchwell, each linked for download from this page.

How do I authenticate with the Perchwell API?

Perchwell uses bearer-token authentication (apiKey/http · 3 schemes). The details are profiled on APIs.io as Perchwell Authentication.

Is the Perchwell API ready for AI agents?

Perchwell has a Kin Score of 36.3 out of 100 (thin) and an Agent Readiness score of 23.1 (agent-aware), scored by API Evangelist on 2026-11-06.

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