Particle Space

Particle Space is proptech infrastructure that exposes real-estate and property data through a REST API, Dashboard, SDKs, and white-labeled UIs. The platform provides real-time access to millions of properties for sale, rent, and off-market - property records, address and property search, valuations, comparables, and listings - using publishable and secret API keys with live and test modes.

Particle Space publishes 5 API contracts indexed on the APIs.io network, including Address Search API, Comparables API, Listings API, and 2 more. Tagged areas include Real Estate, Property Data, PropTech, Listings, and Valuation.

The Particle Space catalog on APIs.io includes 1 Spectral governance ruleset.

Particle Space’s developer surface includes authentication, documentation, and 8 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

22.0/100 emerging ▬ flat Agent 24/100 agent aware Heartbeat 0/100 dormant saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract

Real Estate Property Data PropTech Listings Valuation

What this lets a business do 1

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

Data & Reference Information Services

AE-230

Address Search

GET /properties/search

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 22.0/100 · emerging

Contract Quality 7.7 / 21

Developer Ergonomics 3.0 / 17

Access Clarity 1.1 / 17

Operational Transparency 1.0 / 11

Contract Governance 1.4 / 10

Discoverability 5.6 / 9

Regulatory Posture 0.9 / 15

Agent readiness — 24/100 · agent aware

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 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

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

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 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.

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/.

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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 Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link Ask about this →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →
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) Ask about this →

6 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 6.4 — up to +18.7 composite points Ask about this →
Developer Ergonomics scores 17.9 — up to +16.4 composite points Ask about this →
Contract Quality scores 36.0 — up to +16.0 composite points Ask about this →

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.

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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/particle-space/apis.yml: open an issue on github.com/api-evangelist/particle-space 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 1

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.

OpenAPI

measured — observed by APIs.io (published)

APIs 5

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

Particle Space Address Search API

Address and property search / lookup.

Particle Space Comparables API

Comparable properties for a subject property.

Particle Space Listings API

For-sale, for-rent, and off-market property listings.

Particle Space Property Records API

Property records and detailed attributes.

Particle Space Valuations API

Automated valuation model (AVM) value and rent estimates.

Open Collections 6

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

Particle Space Address Search API

OPEN COLLECTION

Particle Space Address Search Comparables API

OPEN COLLECTION

Particle Space Address Search Listings API

OPEN COLLECTION

Particle Space Address Search Property Records API

OPEN COLLECTION

Particle Space Address Search Valuations API

OPEN COLLECTION

Particle Space API

OPEN COLLECTION

Particle Space API pricing

Not yet checked against Particle Space's own pricing page. Compiled by API Evangelist on 2026-06-21 from particlespace.com/pricing/; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Developer free	Free
Paid Plans usage	—
Enterprise enterprise	—

Plan details, limits and sources →

Rate limits

Monthly API Requests: see provider pricing page requests
Request Rate: see provider documentation requests

Compiled by API Evangelist, not yet checked against Particle Space's documentation. Rate-limit details →

Pricing Plans 1

Published pricing tiers and plan structures.

Particle Space Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Particle Space Rate Limits

2 limits

RATE LIMITS

FinOps 1

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

Particle Space Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

Particle Space API Rules

61 rules · 59 error-severity 1 warn-severity 1 info-severity

SPECTRAL

Security Posture 1

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

Particle Space Authentication

http · 1 scheme

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

Particle Space Agentic Access

7 operations

7 operations · 0 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 2

The organization behind the API

LinkedIn

Website

Website

Other 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

aid: particle-space
url: https://raw.githubusercontent.com/api-evangelist/particle-space/refs/heads/main/apis.yml
name: Particle Space
kind: company
description: Particle Space is proptech infrastructure that exposes real-estate and property data through a REST API, Dashboard,
  SDKs, and white-labeled UIs. The platform provides real-time access to millions of properties for sale, rent, and off-market
  - property records, address and property search, valuations, comparables, and listings - using publishable and secret API
  keys with live and test modes.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/particle-space.png
tags:
- Real Estate
- Property Data
- PropTech
- Listings
- Valuation
tags_raw:
- Real Estate
- Property Data
- PropTech
- Listings
- Valuations
- Real-Estate
created: '2026-06-21'
modified: '2026-06-21'
specificationVersion: '0.23'
apis:
- aid: particle-space:particle-space-address-search-api
  name: Particle Space Address Search API
  description: Address and property search / lookup.
  humanURL: https://docs.particlespace.com/docs/intro/
  baseURL: https://api.particlespace.com
  tags:
  - Address Search
  properties:
  - type: OpenAPI
    url: openapi/particle-space-address-search-api-openapi.yml
  - type: Documentation
    url: https://docs.particlespace.com/docs/intro/
  - type: PostmanCollection
    url: collections/particle-space.postman_collection.json
  - type: OpenCollection
    url: collections/particle-space.opencollection.json
- aid: particle-space:particle-space-comparables-api
  name: Particle Space Comparables API
  description: Comparable properties for a subject property.
  humanURL: https://docs.particlespace.com/docs/intro/
  baseURL: https://api.particlespace.com
  tags:
  - Comparables
  properties:
  - type: OpenAPI
    url: openapi/particle-space-comparables-api-openapi.yml
  - type: Documentation
    url: https://docs.particlespace.com/docs/intro/
  - type: PostmanCollection
    url: collections/particle-space.postman_collection.json
  - type: OpenCollection
    url: collections/particle-space.opencollection.json
- aid: particle-space:particle-space-listings-api
  name: Particle Space Listings API
  description: For-sale, for-rent, and off-market property listings.
  humanURL: https://docs.particlespace.com/docs/intro/
  baseURL: https://api.particlespace.com
  tags:
  - Listings
  properties:
  - type: OpenAPI
    url: openapi/particle-space-listings-api-openapi.yml
  - type: Documentation
    url: https://docs.particlespace.com/docs/intro/
  - type: PostmanCollection
    url: collections/particle-space.postman_collection.json
  - type: OpenCollection
    url: collections/particle-space.opencollection.json
- aid: particle-space:particle-space-property-records-api
  name: Particle Space Property Records API
  description: Property records and detailed attributes.
  humanURL: https://docs.particlespace.com/docs/intro/
  baseURL: https://api.particlespace.com
  tags:
  - Property Records
  properties:
  - type: OpenAPI
    url: openapi/particle-space-property-records-api-openapi.yml
  - type: Documentation
    url: https://docs.particlespace.com/docs/intro/
  - type: PostmanCollection
    url: collections/particle-space.postman_collection.json
  - type: OpenCollection
    url: collections/particle-space.opencollection.json
- aid: particle-space:particle-space-valuations-api
  name: Particle Space Valuations API
  description: Automated valuation model (AVM) value and rent estimates.
  humanURL: https://docs.particlespace.com/docs/intro/
  baseURL: https://api.particlespace.com
  tags:
  - Valuation
  tags_raw:
  - Valuations
  properties:
  - type: OpenAPI
    url: openapi/particle-space-valuations-api-openapi.yml
  - type: Documentation
    url: https://docs.particlespace.com/docs/intro/
  - type: PostmanCollection
    url: collections/particle-space.postman_collection.json
  - type: OpenCollection
    url: collections/particle-space.opencollection.json
common:
- type: CapabilityMap
  url: capabilities/particle-space-capability-edges.yml
  name: Particle Space Business Capability Map
- type: AgenticAccess
  url: agentic-access/particle-space-agentic-access.yml
- type: Authentication
  url: authentication/particle-space-authentication.yml
- type: GitHubOrganization
  url: https://github.com/particlespace
- type: LinkedIn
  url: https://www.linkedin.com/company/particle-space
- type: Website
  url: https://particlespace.com/
- type: Documentation
  url: https://docs.particlespace.com/
- type: Plans
  url: plans/particle-space-plans-pricing.yml
- type: RateLimits
  url: rate-limits/particle-space-rate-limits.yml
- type: FinOps
  url: finops/particle-space-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-lifecycle:
  state: shuttered
  reason: domain-does-not-resolve
  observed: '2026-09-27'
  detail: The company's own domain returned no A or AAAA record when probed. This is an observation about the domain, not
    a request from the company.
  indexed: false

Particle Space API — frequently asked questions

Does Particle Space have an API?

Yes. APIs.io lists 5 APIs from Particle Space, including Particle Space Address Search API, Particle Space Comparables API and Particle Space Listings API, and 2 more.

Is there an OpenAPI specification for the Particle Space API?

Yes. APIs.io indexes 5 OpenAPI specifications for Particle Space, each linked for download from this page.

How do I authenticate with the Particle Space API?

Particle Space uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Particle Space Authentication.

How much does the Particle Space API cost?

APIs.io lists 3 pricing plans for Particle Space, with each plan's price, limits and inclusions under Pricing on this page.

Is the Particle Space API ready for AI agents?

Particle Space has a Kin Score of 22.0 out of 100 (emerging) and an Agent Readiness score of 23.7 (agent-aware), scored by API Evangelist on 2026-11-13.

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