# Willow

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

Willow Innovations, Inc. is a Mountain View, California consumer health-technology company founded in 2014 that makes wearable, in-bra breast pumps — the Willow 360, Willow Go and the Wave manual pump — sold direct to consumers at onewillow.com and paired with a mobile app that tracks output and controls suction. Willow publishes no developer programme, API keys or OpenAPI, but its storefront is an agent-callable surface: it serves a Universal Commerce Protocol merchant profile at /.well-known/ucp.json and a live, anonymous MCP endpoint at /api/ucp/mcp exposing 13 tools for catalog search, cart, checkout and order retrieval, alongside published agent instructions (agents.md, llms.txt) and OAuth 2.0/OIDC customer-account discovery documents.

## Kin Score — 27.0 / 100 (thin)

Scored 2026-09-04 under rubric 0.18.3.

| Facet | Score |
|---|---|
| Discoverability | 68.5 |
| Contract Quality | 0.0 |
| Governance | 18.2 |
| Contract Governance | 18.2 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 30.4 |
| Commercial Clarity | 34.2 |
| Access Clarity | 34.2 |

Regulatory layer — **Health**: 52.5 (matched via tags).

## Agent readiness — 28.3 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | served |
| Idempotency | documented |
| 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)

- **Willow Pump UCP Commerce MCP** — Willow's storefront agent surface — a JSON-RPC 2.0 Model Context Protocol endpoint implementing the Universal Commerce Protocol 2026-08-25 shopping service. tools/list answers u...

## MCP servers (1)

- **Willow Pump UCP Commerce MCP Server** — Willow's online store at onewillow.com exposes a live, anonymous Model Context Protocol endpoint implementing the Universal Commerce Protocol (UCP) shopping service. An MCP clie...

## Security (2)

- **Willow Authentication** — 4 schemes
- **Willow Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Willow Plans Pricing**

## Tags

Company, Consumer Health, Breast Pumps, Maternal Health, Medical Devices, Ecommerce, Agentic Commerce, MCP, UCP, agent-native, Shopify

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