# California Regional MLS

**Canonical:** https://apis.io/providers/crmls/  
**Website:** https://go.crmls.org/  
**APIs profiled:** 0

California Regional MLS (CRMLS) is the largest multiple listing service in the United States, serving REALTORS across California with MLS systems (Flexmls, Matrix, Paragon), compliance and education. Listing data reaches developers as IDX and RESO certified data feeds licensed through a CRMLS data licensing request and approved IDX vendors; CRMLS publishes no public API documentation or machine-readable contract of its own.

## Kin Score — 6.8 / 100 (minimal)

Scored 2026-11-06 under rubric 0.27.0. Trend: flat (-3.4 from 10.2).

| Facet | Score |
|---|---|
| Discoverability | 48.2 |
| Contract Quality | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 3.6 |
| Access Clarity | 11.8 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 7.8 (matched via fallback).

## Agent readiness — 0.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |
| Pagination Ratio | na |
| Operation Distinctiveness | na |
| MCP Tool Quality | na |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## Security (1)

- **Crmls Domain Security** — TLSv1.3 · DMARC

## Tags

Company, Real Estate, MLS, IDX, RESO, Listings, California

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