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.

📡 Source on GitHub

0 APIs

Company Health Wellness Weight Loss Fitness Acquired

Source (apis.yml)

aid: weilos
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
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: '0.23'
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

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/weilos"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/weilos/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/weilos/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.