Mlsgrid

The MLS Grid is a normalized, RESO-compliant data distribution platform that gives brokers, MLSs, and application vendors a single OData v4 Web API and one master data license agreement covering 50+ participating MLSs across the United States. Built on the RESO Data Dictionary, the MLS Grid Web API standardizes Property, Member, Office, OpenHouse, Media, and Lookup resources for IDX, VOW, broker-only, and product-development use cases, replacing the per-MLS RETS feed sprawl that historically burdened real-estate technology vendors.

Mlsgrid publishes 7 APIs on the APIs.io network, including Lookup API, Media API, Member API, and 4 more.

The Mlsgrid catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

Mlsgrid’s developer surface includes signup flow, FAQ, engineering blog, changelog, code examples, authentication, developer portal, and 35 more developer resources.

🌐 Visit website 📡 Source on GitHub

58.0/100 strong ▬ flat Agent 31/100 agent ready saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessPaid

1 APIs 15 Features

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 58.0/100 · strong

Contract Quality 18.6 / 25

Developer Ergonomics 7.6 / 20

Access Clarity 12.6 / 20

Operational Transparency 6.8 / 13

Contract Governance 5.6 / 12

Discoverability 6.7 / 10

Agent readiness — 31/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 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 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

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 github.com/api-evangelist/mlsgrid: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 7

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

mlsgrid Lookup API

Enumerated lookup values per originating MLS.

mlsgrid Media API

Listing media (photos, virtual tours) expanded from Property.

mlsgrid Member API

Real estate agents (RESO Data Dictionary Member resource).

mlsgrid Metadata API

OData service and EDMX metadata.

mlsgrid Office API

Brokerage offices (RESO Data Dictionary Office resource).

mlsgrid OpenHouse API

Open house events (RESO Data Dictionary OpenHouse resource).

mlsgrid Property API

Property listings (RESO Data Dictionary Property resource).

Scroll for all 7

Open Collections 9

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

API Collection

OPEN COLLECTION

MLS Grid RESO Web Lookup API

OPEN COLLECTION

MLS Grid RESO Web Lookup Media API

OPEN COLLECTION

MLS Grid RESO Web Lookup Member API

OPEN COLLECTION

MLS Grid RESO Web Lookup Metadata API

OPEN COLLECTION

MLS Grid RESO Web Lookup Office API

OPEN COLLECTION

MLS Grid RESO Web Lookup OpenHouse API

OPEN COLLECTION

MLS Grid RESO Web Lookup Property API

OPEN COLLECTION

MLS Grid RESO Web API

OPEN COLLECTION

Scroll for all 9

Pricing Plans 1

Published pricing tiers and plan structures.

Mlsgrid Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Mlsgrid Rate Limits

4 limits

RATE LIMITS

FinOps 1

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

Mlsgrid Finops

FINOPS

Features 15

Notable capabilities this provider offers.

RESO Data Dictionary compliant entity model (Property, Member, Office, OpenHouse, Media, Lookup)

RESO Web API compliant OData v4 surface with $select, $filter, $expand, $top, $count, @odata.nextLink

Single Master Data License Agreement spanning all participating MLSs

OAuth 2.0 bearer-token authentication with long-lived tokens

Incremental replication via OriginatingSystemName + ModificationTimestamp pattern

$expand=Media,Rooms,UnitTypes for nested resource replication on Property

Standalone Media resource where the originating MLS permits (e.g. Northstar MLS)

All date fields normalized to UTC

Prefixed key fields (e.g. actris-1234567) to namespace records across MLSs

MlgCanView flag for license-driven retention and deletion handling

MlgCanUse array indicating allowed use cases (IDX, VOW, BO, PT)

50+ participating MLSs including ACTRIS, MRED, Northstar, NWMLS, REcolorado, MARIS, Heartland, Realtracs, OneKey

Quarterly compliance audits and centralized vendor management

Per-minute import cadence where the originating MLS permits

Documented rate limits (2 RPS, 7,200/hour, 40,000/24h, 4 GB/hour) with HTTP 429 on violation

Scroll for all 15

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Mlsgrid Context

24 classes · 2 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

Mlsgrid API Rules

5 rules · 4 warnings 1 info

SPECTRAL

Mlsgrid API Rules

5 rules · 2 errors 2 warnings 1 info

SPECTRAL

JSON Schema 2

Standalone JSON Schema definitions for this provider's data models.

MLS Grid Media

15 properties

JSON SCHEMA

MLS Grid Property

37 properties

JSON SCHEMA

Examples 1

Example request and response payloads for these APIs.

Mlsgrid List Properties Example

2 fields

EXAMPLE

Security Posture 2

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

Mlsgrid Authentication

http · 1 scheme

SECURITY

Mlsgrid Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Mlsgrid Agentic Access

8 operations

8 operations · 0 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

SignUp

SignUp

Portal

Portal

Documentation 6

Reference material describing how the API behaves

Documentation

Documentation

Documentation

Documentation

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

AgenticAccess

AgenticAccess

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Conformance

Conventions

ErrorCatalog

Lifecycle

DataModel

Vocabulary

SpectralRuleset

Scroll for all 7

Build 3

SDKs, sample code, and the tooling you integrate with

Examples

Examples

Packages

Packages

GitHubOrganization

GitHubOrganization

Access & Security 5

Authentication, authorization, and security posture

Certification

Certification

Compliance

DomainSecurity

Authentication

Operate 6

Status, limits, changes, and where to get help

FAQ

ChangeLog

ChangeLog

Support

Contact

RateLimits

Commercial 5

Pricing, plans, and the legal terms of use

LicenseAgreement

PrivacyPolicy

TermsOfService

Plans

FinOps

Company 3

The organization behind the API

Website

Website

About

About

Blog

Blog

Other 3

Properties that don't map to a standard resource type

Overview

Overview

Customers

Customers

Resources

Resources

Source (apis.yml)

name: Mlsgrid
aid: mlsgrid
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: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/mlsgrid.png
url: https://raw.githubusercontent.com/api-evangelist/mlsgrid/refs/heads/main/apis.yml
apis:
- aid: mlsgrid:mlsgrid-lookup-api
  name: mlsgrid Lookup API
  description: Enumerated lookup values per originating MLS.
  humanURL: https://docs.mlsgrid.com/api-documentation/api-version-2.0.md
  baseURL: https://api.mlsgrid.com/v2/
  tags:
  - Lookup
  properties:
  - type: OpenAPI
    url: openapi/mlsgrid-lookup-api-openapi.yml
  - type: Documentation
    url: https://docs.mlsgrid.com/api-documentation/api-version-2.0.md
  - type: Documentation
    url: https://docs.mlsgrid.com/master.md
  - type: Metadata
    url: https://api.mlsgrid.com/v2/$metadata
  - type: JSONSchema
    url: json-schema/mlsgrid-property-schema.json
  - type: JSONSchema
    url: json-schema/mlsgrid-media-schema.json
  - type: JSONLD
    url: json-ld/mlsgrid-context.jsonld
- aid: mlsgrid:mlsgrid-media-api
  name: mlsgrid Media API
  description: Listing media (photos, virtual tours) expanded from Property.
  humanURL: https://docs.mlsgrid.com/api-documentation/api-version-2.0.md
  baseURL: https://api.mlsgrid.com/v2/
  tags:
  - Media
  properties:
  - type: OpenAPI
    url: openapi/mlsgrid-media-api-openapi.yml
  - type: Documentation
    url: https://docs.mlsgrid.com/api-documentation/api-version-2.0.md
  - type: Documentation
    url: https://docs.mlsgrid.com/master.md
  - type: Metadata
    url: https://api.mlsgrid.com/v2/$metadata
  - type: JSONSchema
    url: json-schema/mlsgrid-property-schema.json
  - type: JSONSchema
    url: json-schema/mlsgrid-media-schema.json
  - type: JSONLD
    url: json-ld/mlsgrid-context.jsonld
- aid: mlsgrid:mlsgrid-member-api
  name: mlsgrid Member API
  description: Real estate agents (RESO Data Dictionary Member resource).
  humanURL: https://docs.mlsgrid.com/api-documentation/api-version-2.0.md
  baseURL: https://api.mlsgrid.com/v2/
  tags:
  - Member
  properties:
  - type: OpenAPI
    url: openapi/mlsgrid-member-api-openapi.yml
  - type: Documentation
    url: https://docs.mlsgrid.com/api-documentation/api-version-2.0.md
  - type: Documentation
    url: https://docs.mlsgrid.com/master.md
  - type: Metadata
    url: https://api.mlsgrid.com/v2/$metadata
  - type: JSONSchema
    url: json-schema/mlsgrid-property-schema.json
  - type: JSONSchema
    url: json-schema/mlsgrid-media-schema.json
  - type: JSONLD
    url: json-ld/mlsgrid-context.jsonld
- aid: mlsgrid:mlsgrid-metadata-api
  name: mlsgrid Metadata API
  description: OData service and EDMX metadata.
  humanURL: https://docs.mlsgrid.com/api-documentation/api-version-2.0.md
  baseURL: https://api.mlsgrid.com/v2/
  tags:
  - Metadata
  properties:
  - type: OpenAPI
    url: openapi/mlsgrid-metadata-api-openapi.yml
  - type: Documentation
    url: https://docs.mlsgrid.com/api-documentation/api-version-2.0.md
  - type: Documentation
    url: https://docs.mlsgrid.com/master.md
  - type: Metadata
    url: https://api.mlsgrid.com/v2/$metadata
  - type: JSONSchema
    url: json-schema/mlsgrid-property-schema.json
  - type: JSONSchema
    url: json-schema/mlsgrid-media-schema.json
  - type: JSONLD
    url: json-ld/mlsgrid-context.jsonld
- aid: mlsgrid:mlsgrid-office-api
  name: mlsgrid Office API
  description: Brokerage offices (RESO Data Dictionary Office resource).
  humanURL: https://docs.mlsgrid.com/api-documentation/api-version-2.0.md
  baseURL: https://api.mlsgrid.com/v2/
  tags:
  - Office
  properties:
  - type: OpenAPI
    url: openapi/mlsgrid-office-api-openapi.yml
  - type: Documentation
    url: https://docs.mlsgrid.com/api-documentation/api-version-2.0.md
  - type: Documentation
    url: https://docs.mlsgrid.com/master.md
  - type: Metadata
    url: https://api.mlsgrid.com/v2/$metadata
  - type: JSONSchema
    url: json-schema/mlsgrid-property-schema.json
  - type: JSONSchema
    url: json-schema/mlsgrid-media-schema.json
  - type: JSONLD
    url: json-ld/mlsgrid-context.jsonld
- aid: mlsgrid:mlsgrid-openhouse-api
  name: mlsgrid OpenHouse API
  description: Open house events (RESO Data Dictionary OpenHouse resource).
  humanURL: https://docs.mlsgrid.com/api-documentation/api-version-2.0.md
  baseURL: https://api.mlsgrid.com/v2/
  tags:
  - OpenHouse
  properties:
  - type: OpenAPI
    url: openapi/mlsgrid-openhouse-api-openapi.yml
  - type: Documentation
    url: https://docs.mlsgrid.com/api-documentation/api-version-2.0.md
  - type: Documentation
    url: https://docs.mlsgrid.com/master.md
  - type: Metadata
    url: https://api.mlsgrid.com/v2/$metadata
  - type: JSONSchema
    url: json-schema/mlsgrid-property-schema.json
  - type: JSONSchema
    url: json-schema/mlsgrid-media-schema.json
  - type: JSONLD
    url: json-ld/mlsgrid-context.jsonld
- aid: mlsgrid:mlsgrid-property-api
  name: mlsgrid Property API
  description: Property listings (RESO Data Dictionary Property resource).
  humanURL: https://docs.mlsgrid.com/api-documentation/api-version-2.0.md
  baseURL: https://api.mlsgrid.com/v2/
  tags:
  - Property
  properties:
  - type: OpenAPI
    url: openapi/mlsgrid-property-api-openapi.yml
  - type: Documentation
    url: https://docs.mlsgrid.com/api-documentation/api-version-2.0.md
  - type: Documentation
    url: https://docs.mlsgrid.com/master.md
  - type: Metadata
    url: https://api.mlsgrid.com/v2/$metadata
  - type: JSONSchema
    url: json-schema/mlsgrid-property-schema.json
  - type: JSONSchema
    url: json-schema/mlsgrid-media-schema.json
  - type: JSONLD
    url: json-ld/mlsgrid-context.jsonld
common:
- type: Website
  url: https://www.mlsgrid.com/
- type: SignUp
  url: https://www.mlsgrid.com/interest-form
- type: LicenseAgreement
  url: https://www.mlsgrid.com/s/MLS-GRID-Data-License-Agreement.pdf
- type: FAQ
  url: https://www.mlsgrid.com/faq
- type: Overview
  url: https://www.mlsgrid.com/overview
- type: About
  url: https://www.mlsgrid.com/whoisthemlsgrid
- type: Customers
  url: https://www.mlsgrid.com/vendors
- type: Blog
  url: https://www.mlsgrid.com/news
- type: Certification
  url: https://certification.reso.org/summary/T00000045
- type: Certification
  url: https://www.reso.org/certificates/
- type: ChangeLog
  url: https://docs.mlsgrid.com/
- type: ChangeLog
  url: changelog/mlsgrid-changelog.yml
- type: Compliance
  url: https://certification.reso.org/summary/T00000045
- type: Conformance
  url: conformance/mlsgrid-conformance.yml
- type: Conventions
  url: conventions/mlsgrid-conventions.yml
- type: ErrorCatalog
  url: errors/mlsgrid-problem-types.yml
- type: Lifecycle
  url: lifecycle/mlsgrid-lifecycle.yml
- type: DataModel
  url: data-model/mlsgrid-data-model.yml
- type: Examples
  url: examples/_index.yml
- type: Packages
  url: packages/mlsgrid-packages.yml
- type: LLMsTxt
  url: llms/mlsgrid-llms.txt
- type: AgenticAccess
  url: agentic-access/mlsgrid-agentic-access.yml
- type: DomainSecurity
  url: security/mlsgrid-domain-security.yml
- type: Authentication
  url: authentication/mlsgrid-authentication.yml
- url: https://www.mlsgrid.com
  type: Portal
- url: https://docs.mlsgrid.com
  type: Documentation
- url: https://docs.mlsgrid.com/master.md
  type: Documentation
- url: https://docs.mlsgrid.com/api-documentation/api-version-2.0.md
  name: API Version 2.0
  type: Documentation
- url: https://docs.mlsgrid.com/sitemap.md
  name: Documentation Sitemap
  type: Documentation
- url: https://www.mlsgrid.com
  name: Resources and Guides
  type: Resources
- url: https://www.mlsgrid.com
  type: PrivacyPolicy
- url: https://www.mlsgrid.com
  type: TermsOfService
- url: mailto:support@mlsgrid.com
  type: Support
- url: mailto:info@mlsgrid.com
  type: Contact
- url: https://github.com/mlsgrid
  type: GitHubOrganization
- url: https://www.reso.org/data-dictionary/
  name: RESO Data Dictionary
  type: Documentation
- url: https://www.reso.org/reso-web-api/
  name: RESO Web API Specification
  type: Documentation
- url: plans/mlsgrid-plans-pricing.yml
  type: Plans
- url: rate-limits/mlsgrid-rate-limits.yml
  type: RateLimits
- url: finops/mlsgrid-finops.yml
  type: FinOps
- url: vocabulary/mlsgrid-vocabulary.yml
  type: Vocabulary
- url: rules/mlsgrid-rules.yml
  type: SpectralRuleset
- type: Features
  data:
  - RESO Data Dictionary compliant entity model (Property, Member, Office, OpenHouse, Media, Lookup)
  - RESO Web API compliant OData v4 surface with $select, $filter, $expand, $top, $count, @odata.nextLink
  - Single Master Data License Agreement spanning all participating MLSs
  - OAuth 2.0 bearer-token authentication with long-lived tokens
  - Incremental replication via OriginatingSystemName + ModificationTimestamp pattern
  - $expand=Media,Rooms,UnitTypes for nested resource replication on Property
  - Standalone Media resource where the originating MLS permits (e.g. Northstar MLS)
  - All date fields normalized to UTC
  - Prefixed key fields (e.g. actris-1234567) to namespace records across MLSs
  - MlgCanView flag for license-driven retention and deletion handling
  - MlgCanUse array indicating allowed use cases (IDX, VOW, BO, PT)
  - 50+ participating MLSs including ACTRIS, MRED, Northstar, NWMLS, REcolorado, MARIS, Heartland, Realtracs, OneKey
  - Quarterly compliance audits and centralized vendor management
  - Per-minute import cadence where the originating MLS permits
  - Documented rate limits (2 RPS, 7,200/hour, 40,000/24h, 4 GB/hour) with HTTP 429 on violation
  sources:
  - https://www.mlsgrid.com
  - https://docs.mlsgrid.com
  - https://docs.mlsgrid.com/master.md
  - https://docs.mlsgrid.com/api-documentation/api-version-2.0.md
  - https://docs.mlsgrid.com/sitemap.md
  updated: '2026-05-25'
created: '2026-05-25T00:00:00.000Z'
modified: '2026-05-25'
position: Consuming
description: The MLS Grid is a normalized, RESO-compliant data distribution platform that gives brokers, MLSs, and application
  vendors a single OData v4 Web API and one master data license agreement covering 50+ participating MLSs across the United
  States. Built on the RESO Data Dictionary, the MLS Grid Web API standardizes Property, Member, Office, OpenHouse, Media,
  and Lookup resources for IDX, VOW, broker-only, and product-development use cases, replacing the per-MLS RETS feed sprawl
  that historically burdened real-estate technology vendors.
maintainers:
- FN: Kin Lane
  email: info@apievangelist.com
  X: apievangelist
  url: https://apievangelist.com
specificationVersion: '0.23'

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