Blekko

Blekko was a web search engine founded in 2007 by Rich Skrenta, Tom Annau, and Mike Markson and launched publicly in 2010. It was best known for "slashtags" — user-applied /slashtag filters that curated and narrowed search results by category as a spam-resistant alternative to mainstream search engines — and it exposed a developer search API. Blekko was acquired by IBM in March 2015, where its technology and team were folded into the IBM Watson group and its consumer search engine was shut down. This API Evangelist profile is retained as a historical/defunct record; the company no longer operates a live website or public API (blekko.com resolves in DNS but no longer serves HTTPS).

Blekko is profiled on the APIs.io network. Tagged areas include Company, Search, Search Engines, Web Search, and Discovery.

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

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 0.0 / 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/blekko: 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 →

Source (apis.yml)

apis.yml Raw ↑ 
aid: blekko
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/blekko.png
name: Blekko
description: Blekko was a web search engine founded in 2007 by Rich Skrenta, Tom Annau, and Mike Markson and launched publicly
  in 2010. It was best known for "slashtags" — user-applied /slashtag filters that curated and narrowed search results by
  category as a spam-resistant alternative to mainstream search engines — and it exposed a developer search API. Blekko was
  acquired by IBM in March 2015, where its technology and team were folded into the IBM Watson group and its consumer search
  engine was shut down. This API Evangelist profile is retained as a historical/defunct record; the company no longer operates
  a live website or public API (blekko.com resolves in DNS but no longer serves HTTPS).
url: https://raw.githubusercontent.com/api-evangelist/blekko/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- uncork-capital
x-tier: stub
x-tier-reason: portfolio-lead
x-status: defunct
x-defunct-reason: acquired by IBM (March 2015); consumer search engine shut down and technology folded into IBM Watson
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Search
- Search Engines
- Web Search
- Discovery
- Defunct
- Acquired
tags_raw:
- Company
- Search
- Search Engine
- Web Search
- Discovery
- Defunct
- Acquired
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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