4C

4C — legally 4C Insights, Inc. — was a Chicago-based marketing intelligence and advertising technology company founded in 2011 by Northwestern University professor Alok Choudhary, building on his research into large-scale data mining and social signal. Its Scope "closed ecosystems platform" let brands, agencies and media companies discover cross-channel audience insights, plan and execute paid campaigns inside walled-garden environments — Facebook, Instagram, X/Twitter, Snapchat, LinkedIn, Pinterest and connected TV — and measure the results in one self-service tool, with data delivery out to third-party systems by API, email, SFTP or web query. The company raised roughly $26 million through a Series C, grew to about 160 people and ran offices in Chicago, New York, Seattle and Singapore. Mediaocean announced its acquisition of 4C in July 2020 (reported at approximately $150 million) and folded the product into Flashtalking by Mediaocean; after Mediaocean's later combination with Innovid, the 4C social-advertising surface now lives inside Innovid's social ads management product. 4C never operated a public developer program: it consumed the advertising APIs of the closed ecosystems it served rather than publishing one of its own, and today the 4cinsights.com domain serves no HTTPS listener and blanket-301s every path to the acquirer's site. This profile is retained as a historical record; there is no 4C API surface to enrich.

4C is profiled on the APIs.io network. Tagged areas include Company, Defunct, Acquired, Advertising, and Marketing.

📡 Source on GitHub
0.0/100 minimal Agent 0/100 human only Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0
0 APIs
CompanyDefunctAcquiredAdvertisingMarketingAnalyticsSocial MediaTelevisionAudience IntelligenceAdTech

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-25 · rubric v0.23.0
Composite quality — 0.0/100 · minimal
Contract Quality 0.0 / 21
Developer Ergonomics 0.0 / 17
Access Clarity 0.0 / 17
Operational Transparency 0.0 / 11
Contract Governance 0.0 / 10
Discoverability 0.0 / 9
Regulatory Posture 0.9 / 15
Agent readiness — 0/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
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
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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.
The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% 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/4c: 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 →

Security Posture 1

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

4C Domain Security

no transport/DNS hardening detected

SECURITY

Resources

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Company 1

The organization behind the API

LinkedIn
LinkedIn

Other 2

Properties that don't map to a standard resource type

Acquirer
Acquirer
 ParentCompany
ParentCompany

Source (apis.yml)

apis.yml Raw ↑ 
aid: 4c
name: 4C
description: '4C — legally 4C Insights, Inc. — was a Chicago-based marketing intelligence and advertising technology company
  founded in 2011 by Northwestern University professor Alok Choudhary, building on his research into large-scale data mining
  and social signal. Its Scope "closed ecosystems platform" let brands, agencies and media companies discover cross-channel
  audience insights, plan and execute paid campaigns inside walled-garden environments — Facebook, Instagram, X/Twitter, Snapchat,
  LinkedIn, Pinterest and connected TV — and measure the results in one self-service tool, with data delivery out to third-party
  systems by API, email, SFTP or web query. The company raised roughly $26 million through a Series C, grew to about 160 people
  and ran offices in Chicago, New York, Seattle and Singapore. Mediaocean announced its acquisition of 4C in July 2020 (reported
  at approximately $150 million) and folded the product into Flashtalking by Mediaocean; after Mediaocean''s later combination
  with Innovid, the 4C social-advertising surface now lives inside Innovid''s social ads management product. 4C never operated
  a public developer program: it consumed the advertising APIs of the closed ecosystems it served rather than publishing one
  of its own, and today the 4cinsights.com domain serves no HTTPS listener and blanket-301s every path to the acquirer''s
  site. This profile is retained as a historical record; there is no 4C API surface to enrich.'
url: https://raw.githubusercontent.com/api-evangelist/4c/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
x-source-url: https://forgeglobal.com/4c_stock/
x-tier: stub
x-tier-reason: defunct-no-api-surface
x-status: defunct
x-acquired-by: mediaocean
x-acquired-date: '2020-07-29'
x-domain-status: redirect
x-domain-note: 4cinsights.com is still registered (AWS Route 53 nameservers) but has no HTTPS listener — TLS connect to 443
  times out on both the apex and www. Port 80 answers and blanket-301s every path, including /openapi.json, /apis.json and
  every /.well-known/ path, to http://flashtalking.com/social, which lands on https://www.innovid.com/platform/social-ads-management.
  The redirect target belongs to Innovid/Mediaocean, so no artifact behind it is credited to 4C.
x-api-posture: no-product-api
x-api-posture-basis: observed
x-api-posture-note: No developer portal, documentation, machine-readable contract, hosted MCP server, agent card, first-party
  SDK or registry package was found for 4C on any host the record knows. npm search for "4cinsights" returns 0 packages, PyPI
  404s, and github.com/4cinsights is a 404 — the only GitHub matches are two unaffiliated third-party test-framework repos.
specificationVersion: '0.20'
created: '2026-09-05'
modified: '2026-09-05'
tags:
- Company
- Defunct
- Acquired
- Advertising
- Marketing
- Analytics
- Social Media
- Television
- Audience Intelligence
- AdTech
tags_raw:
- Company
- Defunct
- Acquired
- Advertising
- Marketing
- Analytics
- Social Media
- Television
- Audience Intelligence
- Ad Tech
- Social-Media
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Acquirer
  name: Mediaocean — 4C acquisition announcement (2020)
  url: https://www.mediaocean.com/4C-acquisition
- type: ParentCompany
  name: Mediaocean
  url: https://www.mediaocean.com/
- type: LinkedIn
  name: 4C Insights (part of Flashtalking by Mediaocean)
  url: https://www.linkedin.com/company/4c-insights
- type: DomainSecurity
  name: Domain security posture for 4cinsights.com
  url: security/4c-domain-security.yml
x-enrichment:
  date: '2026-09-05'
  status: minimal
  artifacts_added: 2
  pass: local-v3
x-coverage:
  state: none
  reason: defunct
  detail: 4C Insights was acquired by Mediaocean in July 2020 and its brand fully absorbed — 4cinsights.com now serves no
    HTTPS listener at all and blanket-301s every path over port 80, including /openapi.json, /apis.json and all eleven /.well-known/
    paths, to http://flashtalking.com/social, which lands on Innovid's social ads management page.
  evidence:
  - url: http://4cinsights.com/openapi.json
    status: 301
  - url: https://4cinsights.com/
    status: 0
  - url: http://4cinsights.com/.well-known/agent-card.json
    status: 301
  - url: https://api.github.com/orgs/4cinsights
    status: 404
  - url: https://pypi.org/pypi/4cinsights/json
    status: 404
  - url: https://www.mediaocean.com/4C-acquisition
    status: 200
  checked: '2026-09-05'

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