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Bridge

Bridge (Bridge Interactive / Bridge Data Output) is a Zillow Group company that runs the Bridge Platform — a RESO Platinum-certified MLS data distribution service used by Multiple Listing Services and brokerages across the US and Canada. The Bridge RESO Web API exposes normalized listing data (Property, Member, Office, OpenHouse, Media, Room, UnitType) via OData 4.0 at api.bridgedataoutput.com/api/v2/OData, with a parallel native Bridge Web API serving the same resources as flat JSON. A Webhooks API delivers real-time listing change events with PKI-signed payloads. Bridge also distributes Zillow Group Data — parcels, assessments, and ZHVI/ZORI economic feeds — through the same API surface.

agent ready

Solid contracts, transparent operations, and an easy start — typically complete on four or five facets with one clear soft spot.

Kin Score

API Evangelist profiles Bridge the way a machine reads it — 44 machine-readable artifacts across 13 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.

Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Bridge scores 64.6/100 (strong), with a separate agent-readiness read of 48/100 (agent ready). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.

Kin Score

This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 64.6/100 · strong
Contract Quality 17.5 / 25
Developer Ergonomics 10.0 / 20
Commercial Clarity 12.1 / 20
Operational Transparency 6.2 / 13
Governance 8.8 / 12
Discoverability 10.0 / 10
Agent readiness — 48/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
MCP Server 0 / 12
Machine-Readable Auth 10 / 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

How we profile Bridge

Each block below is one kind of artifact we hold for Bridge. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.

APIs 13

Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.

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

Bridge Webhooks API

Manage webhook endpoints that receive real-time POST events from Bridge for listing create/update/delete and other dataset changes, eliminating the need to poll the Web API. End...

Zillow Group Data (ZG Data) API

Zillow Group Data feeds delivered through Bridge — parcels, assessments, transactions, and Zillow Group Econ Data (ZHVI, ZORI, market metrics) — accessible via the same OData/RE...

Bridge Agents API

The Agents API from Bridge — 1 operation(s) for agents.

Bridge Listings API

The Listings API from Bridge — 2 operation(s) for listings.

Bridge Media API

RESO Media resource (photos, virtual tours)

Bridge Member API

RESO Member resource (agents)

Bridge Metadata API

Service document and CSDL schema discovery

Bridge Office API

RESO Office resource (brokerages)

Bridge Offices API

The Offices API from Bridge — 1 operation(s) for offices.

Bridge OpenHouse API

RESO OpenHouse resource

Bridge OpenHouses API

The OpenHouses API from Bridge — 1 operation(s) for openhouses.

Bridge Property API

RESO Property resource (listings)

Bridge Webhooks API

The Webhooks API from Bridge — 3 operation(s) for webhooks.

Scroll within the panel for all 13 ·

Open Collections 3

Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.

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

Bridge RESO Web API

OPEN COLLECTION

Bridge Web API

OPEN COLLECTION

Bridge Webhooks API

OPEN COLLECTION

Pricing Plans 1

Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the six things the Kin Score reads for commercial clarity.

Published pricing tiers and plan structures.

Rate Limits 1

Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.

Documented rate limits and quota policies.

Bridge Mls Rate Limits

4 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.

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

Features 17

The notable capabilities this provider advertises, captured as structured features so they can be searched and compared instead of read one landing page at a time.

Notable capabilities this provider offers.

RESO Platinum-certified Web API serving normalized MLS listing data across the US and Canada
OData 4.0 query surface with $filter, $select, $expand, $orderby, $top, $count plus Bridge unselect extension
Resources include Property, Member, Office, OpenHouse, Media, Room, UnitType, and other RESO-defined entities
Both v2 (api.bridgedataoutput.com/api/v2) and v3 (api.bridgedataoutput.com/api/v3) endpoints
Native Bridge Web API serving the same resources as flat JSON for non-OData consumers
Webhooks API for real-time listing change events with PKI-signed payloads and exponential-backoff retries
Server Token and Access Token authentication scoped per dataset
Data refreshed every 10 minutes or less per MLS feed
Media returned as embedded object on Property records, CDN-hosted at highest available resolution
Off-market and historical data available where licensed by the MLS
DataSystem endpoint to discover dataset capabilities and metadata
$metadata endpoint exposes the OData CSDL schema per dataset
maxpagesize header (default 10, max 200) controls page size — Bridge interprets $top as page size, not total
Zillow Group Data feeds (parcels, assessments, ZHVI/ZORI econ data) on the same API surface
Parity Plus program lets MLSs customize the API the way they would with RETS
Preparing datasets for RESO Data Dictionary 2.0 certification
Public API Explorer with a test dataset for evaluation

Scroll within the panel for all 17 ·

Semantic Vocabularies 1

JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.

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

Bridge Mls Context

31 classes · 1 properties

JSON-LD

Spectral Rules 1

Governance rulesets we run against this provider's specs — the automated checks behind parts of the score. Profiling them makes the quality bar explicit and re-runnable, not a matter of opinion.

Bridge API Rules

5 rules · 4 warnings

SPECTRAL

JSON Schema 2

Standalone JSON Schema definitions describe the data models behind the API. We profile them so the shapes are validatable on their own — useful long after a single request is forgotten.

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

Bridge RESO Member

23 properties

JSON SCHEMA

Bridge RESO Property

51 properties

JSON SCHEMA

Examples 1

Real request and response payloads are what turn a spec from abstract into obvious — and they're one of the twelve things an agent needs to call an API correctly on the first try.

Example request and response payloads for these APIs.

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.

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

Bridge Mls Authentication

apiKey/http · 2 schemes

SECURITY

Bridge Mls Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.

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

Bridge Mls Agentic Access

21 operations · 4 acting

21 operations · 4 acting

AGENTIC

Resources

Every other property we hold for Bridge — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

Access & Security 2

Authentication, authorization, and security posture

Company 2

The organization behind the API

← All providers · Data indexed from github.com/api-evangelist/bridge-mls · machine-readable index on apis.io