Spark Platform is the MLS data platform built by FBS, a 100% employee-owned company in Fargo, North Dakota that has served the US Multiple Listing Service industry for over 30 years and operates the Flexmls MLS system for more than 120 MLS organizations. Spark sits in the distribution layer of US residential real estate: it takes MLS content out of Flexmls and exposes it to third-party developers through two documented interfaces — the proprietary Spark API (https://sparkapi.com/v1, SparkQL filtering, listings, contacts, saved searches, market statistics, portals/VOW accounts) and a RESO Web API implementation at the /Reso/OData endpoint (https://replication.sparkapi.com/Version/3/Reso/OData/) serving Property, Member, Office, Media, OpenHouse, Room, Unit, GreenVerification, PowerProduction and Lookup resources against the RESO Data Dictionary. FBS is a RESO Certified technology provider (Unique Organization Identifier T00000052, status "Certified Current") and appears as the certifying provider on RESO Web API Core 2.0.0 and Data Dictionary 1.7 / 2.0 endorsements for 138 MLS organizations plus one commercial board in the public RESO organizations feed; FBS itself additionally holds RESO webhooks 1.0.0 and RESO Common Format 2.0 endorsements. The API posture must be stated honestly: the documentation is genuinely public and unusually complete, developer registration is a free public form, and the endpoints are live — but they are not open. Every probed data endpoint, including the OData $metadata document, returns HTTP 401 "Invalid API key and/or request signed improperly" anonymously. Real data requires a Developer Agreement with FBS, an MLS-approved data plan purchased through the Spark Datamart under an IDX, VOW or Private role, and a per-MLS fee. Certification here is real and verifiable; reachability is licensed. Home market is the United States.
Spark Platform publishes 3 APIs on the APIs.io network. Tagged areas include Real Estate, United States, MLS, RESO, and Property Listings.
The Spark Platform catalog on APIs.io includes 1 event-driven AsyncAPI specification.
Spark Platform’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, signup flow, authentication, and 30 more developer resources.
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/.
Spark's implementation of the RESO Web API, exposed as an OData service at the /Reso/OData endpoint and serving data shaped by the RESO Data Dictionary. Version 3 is the recomme...
Outbound webhook delivery from the Spark platform. When a Property, Member or Office record changes in an upstream MLS, Spark POSTs a RESO Web API Entity Event payload over HTTP...
aid: spark-platform
url: https://raw.githubusercontent.com/api-evangelist/spark-platform/refs/heads/main/apis.yml
name: Spark Platform
kind: company
description: 'Spark Platform is the MLS data platform built by FBS, a 100% employee-owned company in Fargo, North Dakota that
has served the US Multiple Listing Service industry for over 30 years and operates the Flexmls MLS system for more than
120 MLS organizations. Spark sits in the distribution layer of US residential real estate: it takes MLS content out of Flexmls
and exposes it to third-party developers through two documented interfaces — the proprietary Spark API (https://sparkapi.com/v1,
SparkQL filtering, listings, contacts, saved searches, market statistics, portals/VOW accounts) and a RESO Web API implementation
at the /Reso/OData endpoint (https://replication.sparkapi.com/Version/3/Reso/OData/) serving Property, Member, Office, Media,
OpenHouse, Room, Unit, GreenVerification, PowerProduction and Lookup resources against the RESO Data Dictionary. FBS is
a RESO Certified technology provider (Unique Organization Identifier T00000052, status "Certified Current") and appears
as the certifying provider on RESO Web API Core 2.0.0 and Data Dictionary 1.7 / 2.0 endorsements for 138 MLS organizations
plus one commercial board in the public RESO organizations feed; FBS itself additionally holds RESO webhooks 1.0.0 and RESO
Common Format 2.0 endorsements. The API posture must be stated honestly: the documentation is genuinely public and unusually
complete, developer registration is a free public form, and the endpoints are live — but they are not open. Every probed
data endpoint, including the OData $metadata document, returns HTTP 401 "Invalid API key and/or request signed improperly"
anonymously. Real data requires a Developer Agreement with FBS, an MLS-approved data plan purchased through the Spark Datamart
under an IDX, VOW or Private role, and a per-MLS fee. Certification here is real and verifiable; reachability is licensed.
Home market is the United States.'
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: unknown
onboarding: self-serve
trial: false
try_now: false
public: false
label: Self-serve signup
confidence: medium
source:
- authentication
- scopes
- rate-limits
- security
- sandbox
generated: '2026-09-02'
method: derived
image: https://www.sparkapi.io/wp-content/uploads/2023/07/cropped-Spark_Pin_Favicon-192x192.png
tags:
- Real Estate
- United States
- MLS
- RESO
- Property Listings
- IDX
- PropTech
- Listing Data Infrastructure
- OData
tags_raw:
- Real Estate
- United States
- MLS
- RESO
- Property Listings
- IDX
- PropTech
- Listing Data Infrastructure
- OData
- Real-Estate
created: '2026-07-26'
modified: '2026-07-26'
specificationVersion: '0.23'
apis:
- aid: spark-platform:spark-api
name: Spark API
description: FBS's proprietary REST API over Flexmls MLS content. Documented services include Listings (plus photos, documents,
floor plans, videos, virtual tours, open houses, rooms, units, history and rules), Contacts, Saved Searches, Listing Carts,
Portals/VOW accounts, Market Statistics, Overlays, Standard Fields and custom field metadata, System Info, and a Developers
service for keys, roles, domains, authorizations and usage. Filtering uses SparkQL. Authentication is a Bearer access
token obtained through OAuth 2 or an MLS-issued non-expiring token; anonymous requests return HTTP 401.
humanURL: https://sparkplatform.com/docs/overview/api
baseURL: https://sparkapi.com/v1
tags:
- MLS
- Property Listings
- Real Estate
- IDX
tags_raw:
- MLS
- Property Listings
- Real Estate
- IDX
- Real-Estate
properties:
- type: Documentation
url: https://sparkplatform.com/docs
- type: APIReference
url: https://sparkplatform.com/docs/api_services/read_first
- type: Documentation
url: https://sparkplatform.com/docs/api_services/listings
- type: Documentation
url: https://sparkplatform.com/docs/api_services/market_statistics
- type: Documentation
url: https://sparkplatform.com/docs/supporting_documentation/sparkql_grammar
- type: Documentation
url: https://sparkplatform.com/docs/supporting_documentation/search_and_paging_syntax
- type: Authentication
url: https://sparkplatform.com/docs/authentication/access_token
- type: ErrorCatalog
url: errors/spark-platform-error-codes.yml
- type: Conventions
url: conventions/spark-platform-conventions.yml
- type: Examples
url: examples/spark-platform-request-examples.yml
- type: SignUp
url: https://sparkplatform.com/register/developers
- type: TermsOfService
url: https://sparkplatform.com/docs/terms_of_use/developer_agreement_and_terms_of_use
- aid: spark-platform:spark-reso-web-api
name: Spark RESO Web API
description: Spark's implementation of the RESO Web API, exposed as an OData service at the /Reso/OData endpoint and serving
data shaped by the RESO Data Dictionary. Version 3 is the recommended service root; versions 2 endpoints remain documented.
Resources are Property, Member, Office, Media, OpenHouse, Room, Unit, Green Verification, Power Production and Lookup.
The OData $metadata document at https://replication.sparkapi.com/Version/3/Reso/OData/$metadata is the machine-readable
contract, but it is not anonymously retrievable — it returned HTTP 401 on 2026-07-26. The same API keys used for the Spark
API authorize this endpoint.
humanURL: https://sparkplatform.com/docs/reso/overview
baseURL: https://replication.sparkapi.com/Version/3/Reso/OData/
tags:
- RESO
- OData
- MLS
- Property Listings
- Real Estate
tags_raw:
- RESO
- OData
- MLS
- Property Listings
- Real Estate
- Real-Estate
properties:
- type: Documentation
url: https://sparkplatform.com/docs/reso/overview
- type: APIReference
url: https://sparkplatform.com/docs/reso/properties
- type: Documentation
url: https://sparkplatform.com/docs/reso/request_parameters
- type: Documentation
url: https://sparkplatform.com/docs/reso/reso_replication
- type: Documentation
url: https://sparkplatform.com/docs/supporting_documentation/reso_dictionary
- type: Authentication
url: https://sparkplatform.com/docs/authentication/access_token
- type: DataModel
url: data-model/spark-platform-data-model.yml
- type: Conformance
url: conformance/spark-platform-conformance.yml
- type: Examples
url: examples/spark-platform-request-examples.yml
- aid: spark-platform:spark-webhooks
name: Spark Webhooks
description: Outbound webhook delivery from the Spark platform. When a Property, Member or Office record changes in an upstream
MLS, Spark POSTs a RESO Web API Entity Event payload over HTTPS to a subscriber URL, signed with an HMAC-SHA256 signature
in a Signature header, with up to 3 retries, exponential backoff and a roughly 2-second response timeout. Subscriptions
are filtered by MLS and resource type and support catch-up replay. FBS holds a RESO webhooks 1.0.0 certification endorsement
for this surface. Subscriptions are arranged with FBS rather than self-provisioned.
humanURL: https://sparkplatform.com/docs/webhooks/webhooks
baseURL: https://replication.sparkapi.com/v1
tags:
- Webhook
- RESO
- MLS
- Real Estate
tags_raw:
- Webhooks
- RESO
- MLS
- Real Estate
- Real-Estate
properties:
- type: Documentation
url: https://sparkplatform.com/docs/webhooks/webhooks
- type: Webhooks
url: asyncapi/spark-platform-webhooks.yml
common:
- type: DomainSecurity
url: security/spark-platform-domain-security.yml
- type: Website
url: https://www.sparkapi.io/
- type: DeveloperPortal
url: https://sparkplatform.com/docs
- type: Documentation
url: https://sparkplatform.com/docs
- type: APIReference
url: https://sparkplatform.com/docs/api_services/read_first
- type: GettingStarted
url: https://sparkplatform.com/docs/overview/set_up_access
- type: Support
url: https://www.sparkapi.io/contact/
- type: Blog
url: https://www.sparkapi.io/blog/
- type: BlogRSS
url: https://www.sparkapi.io/feed/
- type: SignUp
url: https://sparkplatform.com/register/developers
- type: Login
url: https://sparkplatform.com/ticket
- type: GitHubOrganization
url: https://github.com/sparkapi
- type: Authentication
url: https://sparkplatform.com/docs/authentication/authentication
- type: Authentication
url: authentication/spark-platform-authentication.yml
- type: OAuthScopes
url: scopes/spark-platform-scopes.yml
- type: OpenIDConnectDiscovery
url: authentication/spark-platform-openid-configuration.json
- type: JSONWebKeySet
url: authentication/spark-platform-openid-jwks.json
- type: WellKnown
url: well-known/spark-platform-well-known.yml
- type: Packages
url: packages/spark-platform-packages.yml
- type: SDKs
url: packages/spark-platform-packages.yml
- type: Postman
url: https://documenter.getpostman.com/view/25548936/2s935snM26
- type: PostmanCollection
url: postman/spark-platform-spark-web-api-queries.postman_collection.json
- type: Examples
url: examples/spark-platform-request-examples.yml
- type: Conventions
url: conventions/spark-platform-conventions.yml
- type: ErrorCatalog
url: errors/spark-platform-error-codes.yml
- type: RateLimits
url: rate-limits/spark-platform-rate-limits.yml
- type: Lifecycle
url: lifecycle/spark-platform-lifecycle.yml
- type: DataModel
url: data-model/spark-platform-data-model.yml
- type: Components
url: components/spark-platform-components.yml
- type: Webhooks
url: asyncapi/spark-platform-webhooks.yml
- type: Conformance
url: conformance/spark-platform-conformance.yml
- type: Compliance
url: https://services.reso.org/orgs?showStats=true&showEndorsements=true
- type: LLMsTxt
url: llms/spark-platform-llms.txt
- type: TermsOfService
url: https://sparkplatform.com/docs/terms_of_use/developer_agreement_and_terms_of_use
- type: PrivacyPolicy
url: https://sparkplatform.com/docs/terms_of_use/privacy
- type: Pricing
url: https://www.sparkapi.io/developers/
- type: Certification
url: https://services.reso.org/orgs?showStats=true&showEndorsements=true
maintainers:
- FN: Kin Lane
email: kin@apievangelist.com
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