# 4th & Heart

**Canonical:** https://apis.io/providers/4th-heart/  
**Website:** https://fourthandheart.com/  
**APIs profiled:** 1

4th & Heart is a California-based consumer packaged goods company that makes grass-fed, pasture-raised ghee (clarified butter) and ghee-based spreads, sold direct-to-consumer from its own Shopify storefront at fourthandheart.com and through national grocery retail. It is not a software vendor and publishes no developer program, but the storefront exposes a real, unauthenticated agent-commerce surface: a Universal Commerce Protocol (UCP) merchant profile at /.well-known/ucp, a live Model Context Protocol server at /api/ucp/mcp serving 13 catalog, cart, checkout and order tools with full JSON Schema, an /llms.txt and /agents.md agent instruction document, and Shopify customer-account OAuth 2.0 / OpenID Connect discovery metadata on its own domain.

## Kin Score — 25.4 / 100 (emerging)

Scored 2026-09-25 under rubric 0.23.0. Trend: flat (+2.7 from 22.7).

| Facet | Score |
|---|---|
| Discoverability | 75.0 |
| Contract Quality | 0.0 |
| Contract Governance | 18.2 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 30.4 |
| Access Clarity | 34.2 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 34.3 (matched via fallback).

## Agent readiness — 23.7 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | platform |
| Auth Clarity | served |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | served |
| Protected Resource Metadata | verified |
| Dynamic Client Registration | no |
| Agentic Commerce | platform |

## APIs (1)

- **4th & Heart Agentic Commerce (UCP / MCP)** — The agent-facing commerce surface of the 4th & Heart online store, implemented by Shopify's native Universal Commerce Protocol support on the merchant's own domain. A remote MCP...

## MCP servers (1)

- **4th & Heart MCP Server**

## Security (2)

- **4Th Heart Authentication** — none/oauth2/openIdConnect · 4 schemes
- **4Th Heart Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **4Th Heart Plans Pricing**

## Tags

Company, Food and Beverage, Consumer Packaged Goods, Retail, E-Commerce, Agentic Commerce, Universal Commerce Protocol, MCP, Shopify, Direct to Consumer

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/4th-heart/). Scores are computed from the provider's own public artifacts under a published rubric.