Klout

Klout was a San Francisco social-analytics company, founded in 2008 by Joe Fernandez and Binh Tran, that scored individuals on their online social influence. The "Klout Score" was a single number from 1 to 100 derived from the size of a person's social network and how other people engaged with the content they published across connected accounts such as Twitter, Facebook, LinkedIn, Instagram, and Google+. Klout operated a public REST API — the Klout API v2 at api.klout.com — that let developers resolve a social handle to a Klout identity, look up a user's score and score history, and retrieve influence graphs (who a user influences and is influenced by) and topic affinities; access was key-based and widely used by marketing, CRM, and social-listening tools, and a large community of third-party client libraries grew up around it in Ruby, Node.js, Python, and PHP. Lithium Technologies acquired Klout on 27 March 2014 for approximately $200 million. Lithium retired Klout as a standalone service on 25 May 2018 — the day the EU General Data Protection Regulation took effect — stating that Klout's AI and machine-learning capabilities were valuable to Lithium but the consumer service was not aligned with its long-term strategy. The Klout API was shut down with the service. Lithium has since been rebranded as Khoros, and klout.com now redirects into the Khoros website. The company is defunct and operates no live API; this profile is retained as a historical provider record in the API Evangelist network.

Klout is profiled on the APIs.io network. Tagged areas include Company, Consumer, Social Media, Social Analytics, and Influence Scoring.

🌐 Visit website 📡 Source on GitHub

7.4/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyConsumerSocial MediaSocial AnalyticsInfluence ScoringSocial ScoringMarketingReputationDefunctAcquired

Kin Score

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

Composite quality — 7.4/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 0.0 / 20

Commercial Clarity 0.0 / 20

Operational Transparency 0.7 / 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/klout: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Lifecycle

Lifecycle

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Acquirer

Acquirer

ArchivedSite

ArchivedSite

Source (apis.yml)

aid: klout
name: Klout
description: Klout was a San Francisco social-analytics company, founded in 2008 by Joe Fernandez and Binh Tran, that scored
  individuals on their online social influence. The "Klout Score" was a single number from 1 to 100 derived from the size
  of a person's social network and how other people engaged with the content they published across connected accounts such
  as Twitter, Facebook, LinkedIn, Instagram, and Google+. Klout operated a public REST API — the Klout API v2 at api.klout.com
  — that let developers resolve a social handle to a Klout identity, look up a user's score and score history, and retrieve
  influence graphs (who a user influences and is influenced by) and topic affinities; access was key-based and widely used
  by marketing, CRM, and social-listening tools, and a large community of third-party client libraries grew up around it in
  Ruby, Node.js, Python, and PHP. Lithium Technologies acquired Klout on 27 March 2014 for approximately $200 million. Lithium
  retired Klout as a standalone service on 25 May 2018 — the day the EU General Data Protection Regulation took effect — stating
  that Klout's AI and machine-learning capabilities were valuable to Lithium but the consumer service was not aligned with
  its long-term strategy. The Klout API was shut down with the service. Lithium has since been rebranded as Khoros, and klout.com
  now redirects into the Khoros website. The company is defunct and operates no live API; this profile is retained as a historical
  provider record in the API Evangelist network.
url: https://raw.githubusercontent.com/api-evangelist/klout/refs/heads/main/apis.yml
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://avatars.githubusercontent.com/u/8203?v=4
x-type: company
x-source: vc-portfolio
x-backed-by:
- kleiner-perkins
x-tier: stub
x-tier-reason: portfolio-lead
x-status: defunct
x-status-reason: Klout was retired as a standalone service by Lithium Technologies on 2018-05-25; the Klout API v2 (api.klout.com)
  was shut down with it. api.klout.com and developer.klout.com no longer resolve, and klout.com redirects to the Khoros website.
x-acquired-by: khoros
x-acquired-date: '2014-03-27'
x-defunct-date: '2018-05-25'
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Consumer
- Social Media
- Social Analytics
- Influence Scoring
- Social Scoring
- Marketing
- Reputation
- Defunct
- Acquired
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://klout.com
- type: Acquirer
  url: https://khoros.com
- type: GitHubOrganization
  url: https://github.com/klout
- type: ArchivedSite
  url: https://web.archive.org/web/*/klout.com
- type: Packages
  url: packages/klout-packages.yml
- type: Lifecycle
  url: lifecycle/klout-lifecycle.yml
- type: DomainSecurity
  url: security/klout-domain-security.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence