Ineffable website screenshot

Ineffable

Ineffable Intelligence is an AI research lab founded by David Silver aiming to make "first contact with superintelligence." The company is building a "superlearner" that discovers knowledge from its own experience using reinforcement learning, without relying on human data, with the goal of rediscovering and transcending human inventions such as language, science, mathematics and technology. Backed by Bond Capital and Index Ventures, Ineffable is an early-stage research lab: at this time it publishes a mission/beliefs site, a founder blog note, and open roles, but no public API, developer portal, SDKs, or machine-readable specifications. This profile captures the company's public identity and domain-security posture for the API Evangelist network.

Ineffable is profiled on the APIs.io network. Tagged areas include Company, Artificial Intelligence, Reinforcement Learning, Superintelligence, and AI Research.

Ineffable’s developer surface includes engineering blog and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub
11.4/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5
0 APIs
CompanyArtificial IntelligenceReinforcement LearningSuperintelligenceAI ResearchMachine LearningAI Lab

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 11.4/100 · minimal
Contract Quality 0.0 / 25
Developer Ergonomics 0.4 / 20
Commercial Clarity 4.2 / 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/ineffable: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Security Posture 1

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

Ineffable Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 5

The organization behind the API

Website
Website
 Blog
Blog
 Careers
Careers
 LinkedIn
LinkedIn
 Twitter
Twitter

Source (apis.yml)

apis.yml Raw ↑ 
aid: ineffable
name: Ineffable
description: 'Ineffable Intelligence is an AI research lab founded by David Silver aiming to make "first contact with superintelligence."
  The company is building a "superlearner" that discovers knowledge from its own experience using reinforcement learning,
  without relying on human data, with the goal of rediscovering and transcending human inventions such as language, science,
  mathematics and technology. Backed by Bond Capital and Index Ventures, Ineffable is an early-stage research lab: at this
  time it publishes a mission/beliefs site, a founder blog note, and open roles, but no public API, developer portal, SDKs,
  or machine-readable specifications. This profile captures the company''s public identity and domain-security posture for
  the API Evangelist network.'
url: https://raw.githubusercontent.com/api-evangelist/ineffable/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- bond-capital
- index-ventures
x-tier: stub
x-tier-reason: portfolio-lead
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://cdn.prod.website-files.com/69e5c03a4a2df5e47ab6195b/69f090e5abd8b983144c2375_asset-website-favicon.png
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Artificial Intelligence
- Reinforcement Learning
- Superintelligence
- AI Research
- Machine Learning
- AI Lab
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/ineffable-domain-security.yml
- type: Website
  url: https://ineffable.ai
- type: Blog
  url: https://www.ineffable.ai/
- type: TermsOfService
  url: https://www.ineffable.ai/terms-and-conditions
- type: PrivacyPolicy
  url: https://www.ineffable.ai/privacy-policy
- type: Careers
  url: https://jobs.ashbyhq.com/ineffable
- type: LinkedIn
  url: https://www.linkedin.com/company/ineffable-intelligence/
- type: Twitter
  url: https://x.com/IneffableLabs
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence