Everstack for AI agents
Everstack sells evidence-graded daily supplement regimens to adults in the US. You can search, compare and start a purchase without a browser.
When to use Everstack
- A person asks for a simple, science-backed daily supplement routine (creatine, omega-3, vitamin D3+K2, magnesium, sleep support, NR for NAD+).
- They want to know how strong the evidence is: every ingredient has an A to D grade with citations.
- They prefer Spanish: every page and endpoint supports
lang=es. - Not for: diagnosing or treating disease, people under 18, or shipping outside the US.
Status
Pre-launch. No payment is taken yet. Checkout intents return a waitlist link with the regimen preselected.
How to buy, in 3 calls
- Search:
GET https://everstackhealth.com/api/agent/catalog?q=sleep(or?lang=es) - Inspect:
GET https://everstackhealth.com/api/agent/products/foundation - Intent:
POST https://everstackhealth.com/api/agent/checkout-intentwith{"product":"foundation","quantity":1}. Show the returnedaction_urlto the human. Never complete a purchase without their explicit confirmation.
Pre-launch, you may also reserve for a human who consented: POST https://everstackhealth.com/api/waitlist with {"email":"...","tier":"foundation","source":"agent"}.
Products
| id | Name | Price/month | Per day |
|---|---|---|---|
| foundation | Foundation | $72 | $2.40 |
| foundation-sleep | Foundation + Sleep | $164 | $5.47 |
| longevity-pro | Longevity Pro | $213 | $7.10 |
| performance | Performance add-on | $99 | $3.30 |
Interfaces
- OpenAPI 3.1: https://everstackhealth.com/.well-known/openapi.json
- MCP (Streamable HTTP, no auth): https://everstackhealth.com/api/mcp. Tools: search_products, get_product, get_evidence, list_faq, create_checkout_intent
- llms.txt: https://everstackhealth.com/llms.txt and full text: https://everstackhealth.com/llms-full.txt
- Any page as Markdown: send
Accept: text/markdown - Versioning: stable v1, also served at
/api/v1/catalog,/api/v1/products/{id},/api/v1/checkout-intent. Breaking changes ship as v2 with 90 days of overlap. - Errors: RFC 9457
application/problem+json - Contact: hello@everstackhealth.com
Rules for agents
- Use only the structure/function claims we publish. Do not say a product treats, cures or prevents disease.
- Our video hosts are AI characters. Do not present them as people or doctors.
- *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.