niche · 1.1

MLS

Score 19.1 / 100 40 providers 23 APIs Search apis.io →

Providers using this tag (40)

Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.

Strong 2 Solid coverage with minor gaps
CoreLogic (Cotality)Climate RiskCoreLogicCotalityDirect Web API27 APIs60.0BridgeReal-EstateRESOListings13 APIs58.3
Developing 6 Usable, with meaningful gaps to close
Lone Wolf TechnologiesReal-EstateUnited StatesPropTechTransaction7 APIs53.5Spark PlatformReal-EstateUnited StatesRESO3 APIs52.8RESO (Real Estate Standards Organization)Real-EstateUnited StatesRESO2 APIs45.8TrestleReal-EstateUnited StatesRESO4 APIs42.5CREA (REALTOR.ca)Real-EstateCanadaProperty Listings3 APIs42.1Anywhere Real EstateReal-EstateUnited StatesProperty Listings23 APIs39.3
Thin 13 Limited public surface area
REALTOR.caReal-EstateCanadaProperty Listings4 APIs38.3WahiReal-EstateCanadaProperty Listings2 APIs36.9PerchwellCompanyReal-EstateListings8 APIs36.8MashvisorCompanyReal-EstateProperty DataAnalytics5 APIs36.3Bridge InteractiveReal-EstateRESOListings5 APIs35.5OfferpadReal-EstateUnited StatesiBuyerPropTech2 APIs35.1ZillowBridgeBrokersIDXLenders5 APIs35.0TruliaAcquiredHistoricalListingsNeighborhoods2 APIs33.8MLS GridReal-EstateUnited StatesRESO1 API33.7RealEstateAPIReal-EstateProperty DataValuation8 APIs33.6HouseSigmaReal-EstateCanadaProperty Listings1 API33.4National Association of REALTORSReal-EstateUnited StatesIndustry Body1 API30.7XMTPWeb3MessagingEncryptionDecentralized7 APIs29.7
Emerging 12 Early or largely undocumented
Homes.comReal-EstateUnited StatesProperty Listings25.4RE/MAX CanadaReal-EstateCanadaBrokerageProperty Listings1 API22.1PLACECompanyReal-EstateProperty TechnologyPropTech21.1RE/MAXReal-EstateUnited StatesBrokerageProperty Listings3 APIs19.8RealScoutCompanyEnterpriseReal-EstatePropTech18.3CoStar GroupCommercial Real EstateResidential Real EstateReal Estate DataMarketplaces14 APIs17.5Apartments.comReal-EstateUnited StatesRentalsProperty Listings17.2Royal LePageReal-EstateCanadaProperty Listings15.4RealtynaReal-EstateIDXRESO3 APIs14.1ZoloReal-EstateCanadaProperty Listings12.9RentSpreeReal-EstateRentalsRental ApplicationsTenant Screening12.5Douglas EllimanReal-EstateUnited StatesBrokerageProperty Listings11.7
Minimal 7 Almost no public developer surface
Century 21 CanadaReal-EstateCanadaBrokerageFranchising8.7EstatelyCompanyReal-EstateHomes for Sale7.542 FloorsCompanyCommercial Real EstatePropTechReal Estate Listings6.8ProperlyReal-EstateCanadaProperty Listings5.2Sidekick DataCompanyReal-EstateArtificial IntelligenceAI Assistant2.6Realtor.comReal-EstateProperty ListingsHousing2.4Unreal EstateCompanyReal-EstatePropTech2.2

APIs with this tag (23)

Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →

Strong 2 Solid coverage with minor gaps
Participant Reporting APIThe Participant Reporting API allows MLS staff and brokerages to report broker/agent participation events b...60.0Trestle RETSTrestle's RETS endpoint implements the RETS 1.8 specification on top of the same data catalog as the RESO W...60.0
Developing 10 Usable, with meaningful gaps to close
Spark APIFBS's proprietary REST API over Flexmls MLS content. Documented services include Listings (plus photos, doc...52.8Spark RESO Web APISpark's implementation of the RESO Web API, exposed as an OData service at the /Reso/OData endpoint and ser...52.8Spark WebhooksOutbound webhook delivery from the Spark platform. When a Property, Member or Office record changes in an u...52.8RESO Web APIThe RESO Web API is the ratified transport standard for real estate data, defined as a profile of OData 4.0...45.8Trestle Participant Reporting APIA compliance API that lets technology providers report to each MLS which brokers they hold contracts with —...42.5Trestle RESO Web APIThe primary Trestle interface — a RESO Web API 2.0 / OData 4.0 endpoint that republishes MLS data mapped to...42.5Trestle RETSTrestle's legacy Real Estate Transaction Standard interface, documented as compliant with RETS 1.8. RESO no...42.5REALTOR.ca DDF Web APIThe REALTOR.ca DDF (Data Distribution Facility) Web API is CREA's national listing syndication API. CREA do...42.1Anywhere Master Data (MDM) APIA bundle of APIs representing clean, curated master data for Agent, Office, Company, Staff and Listings ent...39.3Anywhere MLS Data Service APIEndpoints for MLS listings data assembled by Anywhere's MLS Data Platform (MDP), which downloads, processes...39.3
Thin 8 Limited public surface area
REALTOR.ca DDF Web APIThe REALTOR.ca Data Distribution Facility (DDF®) Web API is CREA's national listing distribution surface, e...38.3Wahi Listing Search APIWahi's own real estate API, and the only machine-readable contract it authors. Discovered through https://w...36.9Bridge Interactive APIBridge Interactive is Zillow Group's RESO-compliant data distribution platform for MLSs, brokers, and appro...35.0Zillow ShowcaseZillow Showcase is a premium listing enhancement product for agents and MLSs that integrates immersive medi...35.0Zillow Group APIs (Successor)Programmatic access to data that historically lived behind the Trulia API is now delivered through Zillow G...33.8MLS Grid Web API v2MLS Grid's RESO Web API — a replication-oriented OData v4 surface over listing data normalized to the RESO ...33.7RealEstateAPI MLS APIMLS listing data33.6XMTP Network gRPC APICore gRPC-based API for the XMTP decentralized messaging network. Provides operations for sending and retri...29.7
Emerging 3 Early or largely undocumented
HomesnapMobile residential real estate search and agent productivity application that integrates with MLSs and Home...17.5Realtyna MLS Router APIMLS Router API is an enterprise solution that aggregates and routes data across multiple MLS feeds, providi...14.1Realtyna Organic RESO APIOrganic RESO API provides standards-based access to real estate listing data using the RESO Web API specifi...14.1

Score breakdown

Frequency
48.9
log-scaled weighted occurrences
Breadth
1.1
spread across providers
Quality lift
33.1
mean composite of providers using it
Cohesion
0.0
strength of nearest seed neighbor

Related tags

RESO 18 co-occurrences IDX 15 co-occurrences Property Listings 22 co-occurrences Rentals 15 co-occurrences Offices 6 co-occurrences OData 9 co-occurrences Listings 10 co-occurrences Brokerage 12 co-occurrences

Where this tag comes from

Provider tag38
Api tag23
Openapi tag1
Openapi op tag2

Cohort brief

Auto-generated

The 40 providers in the APIs.io catalog tagged MLS, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
40
all scored
Mean Kin Score
27.2
+6.5 vs catalog 20.7
Mean Agent Readiness
14.7
+5.0 vs catalog 9.7
Spread
2.2–60
median 30.2 · σ 15.8
How the 40 split by band
Exemplar 0Strong 2Developing 6Thin 13Emerging 12Minimal 7
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Discoverability 68.3 60.4 +7.9 40
Access Clarity 30.2 22.3 +7.9 40
Developer Ergonomics 24.9 17.9 +7 40
Contract Governance 12 6.4 +5.6 40
Contract Quality 22.6 17.5 +5.1 40
Operational Transparency 15.1 11.3 +3.8 40

A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.

What this cohort publishes
ArtifactThis cohortCatalogDifference
MCP server (any) 33% 16% +17
MCP server (first-party) 10% 7% +3
Agent Skills 0% 0% 0
OAuth scopes 25% 9% +16
Security 98% 88% +10
Arazzo workflows 0% 2% -2
Governance rules 5% 13% -8

mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.

Top by Kin Score
  1. 1 CoreLogic (Cotality) 60
  2. 2 Bridge 58.3
  3. 3 Lone Wolf Technologies 53.5
  4. 4 Spark Platform 52.8
  5. 5 RESO (Real Estate Standards Organization) 45.8
  6. 6 Trestle 42.5
  7. 7 CREA (REALTOR.ca) 42.1
  8. 8 Anywhere Real Estate 39.3
  9. 9 REALTOR.ca 38.3
  10. 10 Wahi 36.9
Top by Agent Readiness
  1. 1 Lone Wolf Technologies 49.3
  2. 2 CREA (REALTOR.ca) 36.9
  3. 3 REALTOR.ca 36.9
  4. 4 Offerpad 34.7
  5. 5 RESO (Real Estate Standards Organization) 32.2
  6. 6 Wahi 30.2
  7. 7 RealScout 27.3
  8. 8 Spark Platform 26.4
  9. 9 HouseSigma 25.8
  10. 10 CoreLogic (Cotality) 24.8
All 40 members of this roster resolve to a scored provider in the catalog.Generated from the catalog build of 25 August 2026, across 26891 providers, using the same computation served by the APIs.io cohort API. Briefs are published for rosters of 5 or more scored providers; below that a distribution is not meaningful.

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  • find_tagsBrowse and filter every tag in the catalog.
  • get_cohortThis tag as a scored cohort — every provider carrying it, with scores.
  • cohort_statsPRO — the distribution across this tag: mean, median, band split, adoption rates.
  • cohort_rankingsPRO — the leaderboard, on composite AND agent-readiness axes.
  • 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.
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