Perfect Day

Perfect Day is a Berkeley, California food-technology company, founded in 2014, that makes animal-free dairy proteins with precision fermentation. Rather than farming cows, Perfect Day ferments microflora carrying milk's protein-coding genes to produce ProFerm, a non-animal whey protein with no lactose, cholesterol, hormones or antibiotics, which it sells business-to-business to consumer brands making ice cream, cream cheese, milk, yogurt, protein powders and bakery products. The company is a member of the Precision Fermentation Alliance. Perfect Day publishes no product or developer API; the single machine-readable surface it operates is the WordPress REST API (wp/v2) behind perfectday.com, which exposes anonymous read access to its blog posts, newsroom items, success stories, pages, media, taxonomies and site search, plus authenticated write operations via WordPress application passwords. This profile was enriched by the API Evangelist pipeline from that live surface.

Perfect Day publishes 1 API on the APIs.io network. Tagged areas include Company, Food Technology, Precision Fermentation, Alternative Protein, and Ingredients.

Perfect Day’s developer surface includes documentation, API reference, engineering blog, support, FAQ, authentication, and 25 more developer resources.

🌐 Visit website 📡 Source on GitHub

20.1/100 emerging ▬ flat Agent 6/100 agent aware Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-10-04 · rubric v0.23.0

18 published contracts 1 MCP Servers

Company Food Technology Precision Fermentation Alternative Protein Ingredients Sustainability Biotechnology Consumer Packaged Goods content-api WordPress

Kin Score

Kin Score How this is scored →
scored 2026-10-04 · rubric v0.23.0

Composite quality — 20.1/100 · emerging

Contract Quality 0.0 / 19

Developer Ergonomics 5.6 / 15

Access Clarity 3.2 / 15

Operational Transparency 0.0 / 10

Contract Governance 0.4 / 9

Discoverability 5.4 / 8

Regulatory Posture 3.7 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 6/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/perfect-day: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

Perfect Day Website (WordPress REST)

The public WordPress REST API (wp-json) of the Perfect Day website at perfectday.com: the route index of the site's content management system, catalogued as one site surface rat...

Open Collections 1

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Perfect Day MCP Server

Remote MCP server at perfectday.com over HTTP.

MCP SERVER

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Perfect Day Authentication

http · 1 scheme

SECURITY

Perfect Day Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

WellKnown

MCPServer

AgentSkill

LLMsTxt

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

DataModel

Lifecycle

Conformance

Build 2

SDKs, sample code, and the tooling you integrate with

CodeOfConduct

CodeOfConduct

ToolCrosswalk

ToolCrosswalk

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support

Support

FAQ

FAQ

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 9

The organization behind the API

Website

Blog

BlogRSS

Newsroom

Careers

LinkedIn

Twitter

Twitter

Facebook

Facebook

Instagram

Instagram

Scroll for all 9

Other 3

Properties that don't map to a standard resource type

Overlay

Overlay

Patents

Patents

SecondaryMarket

SecondaryMarket

Source (apis.yml)

aid: perfect-day
name: Perfect Day
description: Perfect Day is a Berkeley, California food-technology company, founded in 2014, that makes animal-free dairy
  proteins with precision fermentation. Rather than farming cows, Perfect Day ferments microflora carrying milk's protein-coding
  genes to produce ProFerm, a non-animal whey protein with no lactose, cholesterol, hormones or antibiotics, which it sells
  business-to-business to consumer brands making ice cream, cream cheese, milk, yogurt, protein powders and bakery products.
  The company is a member of the Precision Fermentation Alliance. Perfect Day publishes no product or developer API; the single
  machine-readable surface it operates is the WordPress REST API (wp/v2) behind perfectday.com, which exposes anonymous read
  access to its blog posts, newsroom items, success stories, pages, media, taxonomies and site search, plus authenticated
  write operations via WordPress application passwords. This profile was enriched by the API Evangelist pipeline from that
  live surface.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://perfectday.com/wp-content/uploads/2022/01/social-share-image.jpg
url: https://raw.githubusercontent.com/api-evangelist/perfect-day/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
x-tier: stub
x-tier-reason: harvest
specificationVersion: '0.23'
created: '2026-08-02'
modified: '2026-08-02'
tags:
- Company
- Food Technology
- Precision Fermentation
- Alternative Protein
- Ingredients
- Sustainability
- Biotechnology
- Consumer Packaged Goods
- content-api
- WordPress
tags_raw:
- Company
- Food Technology
- Precision Fermentation
- Alternative Protein
- Ingredients
- Sustainability
- Biotechnology
- Consumer Packaged Goods
- Content API
- WordPress
apis:
- aid: perfect-day:perfectday-com-website-wordpress-rest
  name: Perfect Day Website (WordPress REST)
  description: 'The public WordPress REST API (wp-json) of the Perfect Day website at perfectday.com: the route index of the
    site''s content management system, catalogued as one site surface rather than as separate APIs.'
  baseURL: https://perfectday.com/wp-json
  tags:
  - WordPress
  x-surface: platform-generated
  properties:
  - type: Documentation
    url: https://perfectday.com/wp-json
  x-platform: wordpress
  x-platform-surface: rest
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Overlay
  url: overlays/perfect-day-media-overlay.yaml
- type: Website
  url: https://perfectday.com/
- type: Documentation
  url: https://perfectday.com/wp-json/
- type: APIReference
  url: https://developer.wordpress.org/rest-api/reference/
- type: Blog
  url: https://perfectday.com/blog/
- type: BlogRSS
  url: https://perfectday.com/blog/feed/
- type: Newsroom
  url: https://perfectday.com/newsroom/
- type: Support
  url: https://perfectday.com/contact-us/
- type: FAQ
  url: https://perfectday.com/faqs/
- type: TermsOfService
  url: https://perfectday.com/terms-of-use/
- type: PrivacyPolicy
  url: https://perfectday.com/privacy-policy/
- type: CodeOfConduct
  url: https://perfectday.com/codes-of-conduct-supplier-responsibility/
- type: Patents
  url: https://perfectday.com/patents/
- type: Careers
  url: https://perfectday.com/careers/
- type: LinkedIn
  url: https://www.linkedin.com/company/perfectday/
- type: Twitter
  url: https://twitter.com/perfectdayfoods
- type: Facebook
  url: https://www.facebook.com/perfectdayfoods
- type: Instagram
  url: https://www.instagram.com/perfectdayfoods/
- type: SecondaryMarket
  url: https://forgeglobal.com/perfect-day_stock/
- type: Authentication
  url: authentication/perfect-day-authentication.yml
- type: Conventions
  url: conventions/perfect-day-conventions.yml
- type: ErrorCatalog
  url: errors/perfect-day-problem-types.yml
- type: DataModel
  url: data-model/perfect-day-data-model.yml
- type: Lifecycle
  url: lifecycle/perfect-day-lifecycle.yml
- type: Conformance
  url: conformance/perfect-day-conformance.yml
- type: WellKnown
  url: well-known/perfect-day-well-known.yml
- type: MCPServer
  url: mcp/perfect-day-mcp.yml
- type: ToolCrosswalk
  url: mcp/perfect-day-tool-crosswalk.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/perfect-day-llms.txt
- type: DomainSecurity
  url: security/perfect-day-domain-security.yml
x-enrichment:
  date: '2026-08-02'
  status: enriched
  artifacts_added: 39
  pass: local-v1

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