# 1820.ch

**Canonical:** https://apis.io/providers/1820-ch/  
**Website:** https://1820.ch/  
**APIs profiled:** 0

1820.ch is a Swiss telephone directory service that provides searchable phone numbers, addresses, and company information for the entire country. Users can quickly find contact details for individuals and businesses, with up-to-date listings and a multilingual interface (German, French, Italian, English). The service also offers a business portal for companies to manage their listings, ensuring accurate and current information.

## Kin Score — 2.5 / 100 (minimal)

Scored 2026-11-02 under rubric 0.26.0. Trend: flat (+0.0 from 2.5).

| Facet | Score |
|---|---|
| Discoverability | 48.3 |
| Contract Quality | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 0.0 |
| Access Clarity | 0.0 |

Regulatory layer — **Telecommunications**: 5.0 (matched via tags).

## Agent readiness — 3.5 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | documented |
| 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).

## MCP servers (1)

- **1820.ch MCP Server** — Remote MCP server at mcp.1820.ch.

## Security (1)

- **1820 Ch Domain Security** — TLSv1.3 · DMARC

## Tags

Phone Directory, Switzerland, Contact Lookup, Business Listings, Telecommunications

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/1820-ch/). Scores are computed from the provider's own public artifacts under a published rubric.