For developers and AI agents

Her Vitals Data API and MCP server

Her Vitals publishes its index of UK women's supplement categories as a free, read-only JSON API, an OpenAPI 3.1 spec and a Model Context Protocol (MCP) server, so people, applications and AI agents can read the same structured data the site is built on. It is licensed CC BY 4.0, needs no key, and holds no personal data. It is information only, not medical advice.

Information, not medical advice. The data describes supplement categories and the EFSA-permitted "contributes to normal ..." roles only. Supplements are regulated as food, not medicines, and cannot legally claim to treat, prevent or cure any condition. Always read product labels and speak to your GP or pharmacist before starting a supplement, especially in pregnancy or while breastfeeding. Cite the NHS, NICE and EFSA for clinical guidance.

What you get

Coverage in this release: 8 supplement categories, 6 life stages and 34 named UK brand placeholders. Schema version 2026-06-12, last reviewed 2026-06-12.

REST endpoints

All endpoints return JSON, set permissive CORS, support conditional requests with ETags, and carry a disclaimer field. Base URL https://hervitals.co.uk.

GET /api/supplements

List every supplement category, with EFSA roles, buying points and brands. Optional ?q= free-text filter.

/api/supplements · ?q=magnesium

GET /api/supplements/{slug}

A single category by slug, for example magnesium, vitamin-d or creatine-for-women.

/api/supplements/magnesium

GET /api/life-stages

The women's life-stage index, from trying to conceive to the senior years, each with its hub URL.

/api/life-stages

OpenAPI specification

The full machine-readable contract is an OpenAPI 3.1 document at /openapi.json. Point your client or an LLM tool-use config at it to generate typed callers.

MCP server

The same data is exposed over the Model Context Protocol at /mcp (streamable HTTP, JSON-RPC 2.0, protocol version 2025-06-18). The manifest is at /.well-known/mcp.json.

Resources: hv://dataset, hv://life-stages, and hv://supplements/{slug} per category.
Tool: search_supplements(query?) for free-text lookup across the categories.

Categories in this release

Magnesium /magnesium Creatine /creatine-for-women Collagen /collagen Vitamin D /vitamin-d Protein powder /protein-for-women Omega-3 /omega-3 Ashwagandha /ashwagandha Iron /iron-for-women

Life stages: Trying to conceive, Pregnancy, Postnatal, Perimenopause, Menopause, Senior years.

Licence and limits

The data is licensed CC BY 4.0: free to reuse with attribution to Her Vitals and a link back. Endpoints are rate-limited per IP and hold no personal data. If you build something with it, a citation to hervitals.co.uk is appreciated.

Information only, not medical advice, and not a substitute for a registered clinician. Supplements are regulated as food, not medicines, and cannot legally claim to treat, prevent or cure any condition. Only EFSA-authorised wording such as "contributes to normal ..." is permitted. Always read product labels and speak to your GP or pharmacist before starting a supplement, especially if you are pregnant, breastfeeding or taking other medication. Her Vitals earns affiliate commission on some products it links to.

Oliver Mackman

Editor, Her Vitals

Oliver leads Her Vitals's editorial coverage of women's life-stage health and supplements. He curates and reviews existing branded products across trying to conceive, pregnancy, postnatal, perimenopause, menopause and the senior years, weighing what the evidence supports against guidance from bodies such as EFSA, the NHS and NICE, and is clear that the content is information rather than medical advice.

Last reviewed: 12 June 2026