# HouseSigma

**Canonical:** https://apis.io/providers/housesigma/  
**Website:** https://housesigma.com/  
**APIs profiled:** 1

HouseSigma, Inc. Brokerage is a Toronto-based Canadian residential real estate portal and licensed brokerage that pairs map-based MLS listing search with sold-price history and machine-learning home valuations (SigmaEstimate) across Ontario, British Columbia, and Alberta. It sits in the challenger layer of the Canadian value chain, below CREA, which operates REALTOR.ca and the national Data Distribution Facility (DDF) that syndicates member boards' listings, and alongside Wahi, Zolo, and Properly, competing on visibility into data the boards control, a position it won in part through the Competition Bureau litigation that forced TRREB to release sold data in 2018. Its API posture is closed. There is no developer portal, no published API program, and no partner or data-licensing page; developer., developers., and docs.housesigma.com do not resolve in DNS, and /developers, /api, /api-docs, /openapi.json and /swagger.json all return the single-page-application shell rather than any contract. The listing, sold-history and valuation backend at housesigma.com/bkv2/api/ is private, keyless, undocumented, and explicitly disallowed to all crawlers in robots.txt. The one genuinely public, anonymously callable, machine-readable HTTP surface the company operates is the WordPress REST API behind housesigma.com/blog-en, which serves its Canadian housing-market analysis blog as JSON across 157 advertised routes; API Evangelist derived an OpenAPI for the 22 operations verified to answer anonymously. HouseSigma also publishes a real llms.txt and mobile deep-link association documents. RESO is absent: HouseSigma is not among the Canadian organizations RESO lists as members, and no Web API or Data Dictionary certification, OData $metadata document, or Universal Property Identifier usage was found. No open, unlicensed dataset is published. The underlying listing and sold data is board-licensed and reaches HouseSigma through its own brokerage membership, not through anything a third-party developer can sign up for.

## Kin Score — 33.2 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 33.2).

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 59.4 |
| Governance | 16.7 |
| Contract Governance | 16.7 |
| Operational Transparency | 2.6 |
| Developer Ergonomics | 20.8 |
| Commercial Clarity | 21.1 |
| Access Clarity | 21.1 |

## Agent readiness — 38.3 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | na |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | na |
| Error Semantics | documented |
| OpenAPI Examples | documented |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | na |

## APIs (1)

- **HouseSigma Blog Content API** — The public, read-only WordPress REST API (wp/v2) behind housesigma.com/blog-en, which serves HouseSigma's Canadian housing-market analysis blog as JSON. This is the only anonymo...

## MCP servers (1)

- **HouseSigma MCP Server**

## Agentic access (1)

- **Housesigma Agentic Access** — 22 operations

## Security (2)

- **Housesigma Authentication** — http · 1 scheme
- **Housesigma Domain Security** — TLSv1.3 · DMARC

## Tags

Real-Estate, Canada, Property Listings, MLS, Valuation, AVM, PropTech, Rentals, Blog, Content, WordPress, oEmbed, Ontario, British Columbia, Toronto

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/housesigma/). Scores are computed from the provider's own public artifacts under a published rubric.