# Perfect Day

> Perfect Day is a Berkeley, California food-technology company, founded in 2014, that makes
> animal-free dairy proteins with precision fermentation. It ferments microflora carrying milk's
> protein-coding genes to produce ProFerm, a non-animal whey protein with no lactose, cholesterol,
> hormones or antibiotics, and sells it business-to-business to consumer brands making ice cream,
> cream cheese, milk, yogurt, protein powders and bakery products.

Important: Perfect Day publishes **no product or developer API**. The only machine-readable surface
it operates is the WordPress REST API (`wp/v2`) behind perfectday.com, which serves the company's
own website content — blog posts, newsroom items, partner success stories, pages, media and
taxonomies. Anonymous read access was verified on 2026-08-02; all write operations require a
WordPress application password. This file was GENERATED by the API Evangelist enrichment pipeline
from that live surface; Perfect Day does not publish an llms.txt (`/llms.txt` returns 404).

## APIs

- [WordPress REST API root](https://perfectday.com/wp-json/): discovery document — 19 namespaces, 260 routes
- [wp/v2 route index](https://perfectday.com/wp-json/wp/v2): 124 routes with full parameter, type, enum and default metadata
- [Posts](https://perfectday.com/wp-json/wp/v2/posts): 71 blog posts
- [News](https://perfectday.com/wp-json/wp/v2/news): 103 newsroom items (custom post type)
- [Success stories](https://perfectday.com/wp-json/wp/v2/success_story): partner and brand case studies (custom post type)
- [Pages](https://perfectday.com/wp-json/wp/v2/pages): 59 marketing and information pages
- [Search](https://perfectday.com/wp-json/wp/v2/search): cross-content-type site search
- [Media](https://perfectday.com/wp-json/wp/v2/media): image and document library
- [Categories](https://perfectday.com/wp-json/wp/v2/categories) / [Tags](https://perfectday.com/wp-json/wp/v2/tags): core taxonomies
- [News categories](https://perfectday.com/wp-json/wp/v2/news_category) / [Success story categories](https://perfectday.com/wp-json/wp/v2/success_story_category) / [Leader categories](https://perfectday.com/wp-json/wp/v2/leader_category): custom taxonomies
- [Taxonomies](https://perfectday.com/wp-json/wp/v2/taxonomies) / [Types](https://perfectday.com/wp-json/wp/v2/types) / [Statuses](https://perfectday.com/wp-json/wp/v2/statuses): metadata

## Specs

- [Posts OpenAPI](https://raw.githubusercontent.com/api-evangelist/perfect-day/refs/heads/main/openapi/perfect-day-posts-openapi.yml)
- [News OpenAPI](https://raw.githubusercontent.com/api-evangelist/perfect-day/refs/heads/main/openapi/perfect-day-news-openapi.yml)
- [Success stories OpenAPI](https://raw.githubusercontent.com/api-evangelist/perfect-day/refs/heads/main/openapi/perfect-day-success-stories-openapi.yml)
- [Pages OpenAPI](https://raw.githubusercontent.com/api-evangelist/perfect-day/refs/heads/main/openapi/perfect-day-pages-openapi.yml)
- [Search OpenAPI](https://raw.githubusercontent.com/api-evangelist/perfect-day/refs/heads/main/openapi/perfect-day-search-openapi.yml)
- [Media OpenAPI](https://raw.githubusercontent.com/api-evangelist/perfect-day/refs/heads/main/openapi/perfect-day-media-openapi.yml)
- [APIs.json](https://raw.githubusercontent.com/api-evangelist/perfect-day/refs/heads/main/apis.yml)

All OpenAPI 3.1.0 documents above were DERIVED by the API Evangelist pipeline from the route
metadata WordPress publishes for this site. They are not provider-published specifications.

## Artifacts

- [Authentication profile](https://raw.githubusercontent.com/api-evangelist/perfect-day/refs/heads/main/authentication/perfect-day-authentication.yml)
- [API conventions](https://raw.githubusercontent.com/api-evangelist/perfect-day/refs/heads/main/conventions/perfect-day-conventions.yml)
- [Error catalog](https://raw.githubusercontent.com/api-evangelist/perfect-day/refs/heads/main/errors/perfect-day-problem-types.yml)
- [Data model](https://raw.githubusercontent.com/api-evangelist/perfect-day/refs/heads/main/data-model/perfect-day-data-model.yml)
- [Lifecycle](https://raw.githubusercontent.com/api-evangelist/perfect-day/refs/heads/main/lifecycle/perfect-day-lifecycle.yml)
- [Conformance](https://raw.githubusercontent.com/api-evangelist/perfect-day/refs/heads/main/conformance/perfect-day-conformance.yml)
- [Well-known probe results](https://raw.githubusercontent.com/api-evangelist/perfect-day/refs/heads/main/well-known/perfect-day-well-known.yml)
- [MCP server (auth-gated)](https://raw.githubusercontent.com/api-evangelist/perfect-day/refs/heads/main/mcp/perfect-day-mcp.yml)
- [Tool crosswalk](https://raw.githubusercontent.com/api-evangelist/perfect-day/refs/heads/main/mcp/perfect-day-tool-crosswalk.yml)
- [Agent skills index](https://raw.githubusercontent.com/api-evangelist/perfect-day/refs/heads/main/skills/_index.yml)
- [Domain security](https://raw.githubusercontent.com/api-evangelist/perfect-day/refs/heads/main/security/perfect-day-domain-security.yml)

## Docs

- [Perfect Day](https://perfectday.com/)
- [ProFerm](https://perfectday.com/proferm/): the non-animal whey protein product
- [Applications](https://perfectday.com/applications/): the dairy categories ProFerm powers
- [Process](https://perfectday.com/process/): how precision fermentation works
- [Made with Perfect Day](https://perfectday.com/made-with-perfect-day/): partner brands
- [Become a partner](https://perfectday.com/consumer-brands/)
- [Impact](https://perfectday.com/impact/): sustainability claims
- [Health and nutrition](https://perfectday.com/health/)
- [Our story](https://perfectday.com/our-story/) / [Mission](https://perfectday.com/mission/)
- [Newsroom](https://perfectday.com/newsroom/) / [Blog](https://perfectday.com/blog/) ([RSS](https://perfectday.com/blog/feed/))
- [FAQs](https://perfectday.com/faqs/)
- [Patents](https://perfectday.com/patents/)
- [Precision Fermentation Alliance](https://perfectday.com/precision-fermentation-alliance/)
- [Careers](https://perfectday.com/careers/)
- [Contact us](https://perfectday.com/contact-us/)
- [Terms of use](https://perfectday.com/terms-of-use/) / [Privacy policy](https://perfectday.com/privacy-policy/)
- [Supplier code of conduct](https://perfectday.com/codes-of-conduct-supplier-responsibility/)
- [WordPress REST API reference](https://developer.wordpress.org/rest-api/reference/): upstream reference for every route above

## Notes for agents

- Reads are anonymous; writes return `401 rest_forbidden` without a WordPress application password.
- Errors use the flat WordPress envelope `{code, message, data.status}`, not RFC 9457.
- Pagination is `page` / `per_page` with `X-WP-Total`, `X-WP-TotalPages` and an RFC 8288 `Link` header.
- There is no idempotency key, no published rate limit, no status page and no deprecation policy.
- `/wp/v2/users` is not registered on this site and returns `404 rest_no_route`.
- No A2A agent card is published (`/.well-known/agent-card.json` and `/.well-known/agent.json` both 404).
- An MCP Adapter endpoint exists at `/wp-json/mcp/mcp-adapter-default-server` but returns `401` to
  anonymous `tools/list`; it is WordPress platform infrastructure, not a documented product server.