Weilos

Weilos was a health and wellness startup surfaced as an a16z portfolio company and added to the API Evangelist network as a stub for enrichment. As of the 2026-07-21 enrichment pass the company no longer operates independently — weilos.com issues a 301 redirect to weightwatchers.com, indicating Weilos has been absorbed into WeightWatchers (WW). No independent developer surface exists — the hosts api.weilos.com, developer.weilos.com, and docs.weilos.com do not resolve in DNS, and there is no public API, OpenAPI specification, SDK, or developer portal to catalog. This profile is retained as an acquired/defunct lead with no API artifacts.

Weilos is profiled on the APIs.io network. Tagged areas include Company, Health, Wellness, Weight Loss, and Fitness.

🌐 Visit website 📡 Source on GitHub

5.7/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyHealthWellnessWeight LossFitnessAcquired

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 5.7/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 0.0 / 20

Commercial Clarity 0.0 / 20

Operational Transparency 0.0 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/weilos: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Source (apis.yml)

aid: weilos
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/weilos.png
name: Weilos
description: Weilos was a health and wellness startup surfaced as an a16z portfolio company and added to the API Evangelist
  network as a stub for enrichment. As of the 2026-07-21 enrichment pass the company no longer operates independently — weilos.com
  issues a 301 redirect to weightwatchers.com, indicating Weilos has been absorbed into WeightWatchers (WW). No independent
  developer surface exists — the hosts api.weilos.com, developer.weilos.com, and docs.weilos.com do not resolve in DNS, and
  there is no public API, OpenAPI specification, SDK, or developer portal to catalog. This profile is retained as an acquired/defunct
  lead with no API artifacts.
url: https://raw.githubusercontent.com/api-evangelist/weilos/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
x-tier: stub
x-tier-reason: portfolio-lead
x-status: acquired
x-status-note: weilos.com 301-redirects to weightwatchers.com (verified 2026-07-21); no independent API surface.
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Health
- Wellness
- Weight Loss
- Fitness
- Acquired
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-21'
  status: nochange
  artifacts_added: 0
  pass: local-v1