Approxima

Approxima is a Y Combinator (Winter 2026) startup building AI agents that test every pull request. Approxima plugs into your CI/CD pipeline and runs autonomous agents on each PR: the agents build your application in an isolated sandbox, exercise it in a real browser, and report exactly what is broken, with screenshots. The company positions itself as a trust layer for AI-assisted software development, letting engineering teams catch regressions and validate fixes end to end before code merges to production. As of this profile Approxima operates a marketing site and private login at approxima.ai and does not yet publish a public API, developer documentation, or an OpenAPI definition; this repo captures its identity and domain-security posture pending a public API surface.

Approxima is profiled on the APIs.io network. Tagged areas include Company, Software Development, AI Agents, Testing, and QA.

🌐 Visit website 📡 Source on GitHub

10.5/100 minimal ▬ flat Agent 0/100 human only saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

Company Software Development AI Agents Testing QA CI/CDPull RequestDeveloper Tools Y Combinator

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 10.5/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 0.0 / 20

Access Clarity 5.5 / 20

Operational Transparency 0.0 / 13

Contract Governance 0.0 / 12

Discoverability 5.0 / 10

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

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.

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/approxima: 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.

Approxima Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Login

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 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: approxima
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  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/approxima.png
name: Approxima
description: 'Approxima is a Y Combinator (Winter 2026) startup building AI agents that test every pull request. Approxima
  plugs into your CI/CD pipeline and runs autonomous agents on each PR: the agents build your application in an isolated sandbox,
  exercise it in a real browser, and report exactly what is broken, with screenshots. The company positions itself as a trust
  layer for AI-assisted software development, letting engineering teams catch regressions and validate fixes end to end before
  code merges to production. As of this profile Approxima operates a marketing site and private login at approxima.ai and
  does not yet publish a public API, developer documentation, or an OpenAPI definition; this repo captures its identity and
  domain-security posture pending a public API surface.'
url: https://raw.githubusercontent.com/api-evangelist/approxima/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-17'
tags:
- Company
- Software Development
- AI Agents
- Testing
- QA
- CI/CD
- Pull Request
- Developer Tools
- Y Combinator
apis: []
common:
- type: DomainSecurity
  url: security/approxima-domain-security.yml
- type: Website
  url: https://approxima.ai
- type: Login
  url: https://approxima.ai/login
- type: TermsOfService
  url: https://approxima.ai/terms
- type: PrivacyPolicy
  url: https://approxima.ai/privacy
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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