CircuitLab

CircuitLab, Inc. is an in-browser schematic capture and circuit simulation platform that lets engineers, students, educators, and hobbyists design and analyze analog and digital electronics systems before building a physical prototype. Running entirely in the browser with no installation, it offers schematic capture, mixed-signal SPICE-style simulation (DC, AC, transient, frequency-domain), custom device models and symbols, expression-based parameters, and shareable, exportable documentation. CircuitLab also publishes an electronics curriculum (CircuitLab Academy, the Ultimate Electronics textbook), community forums, and an electronics Q&A. It was surfaced as a portfolio company of a16z and Y Combinator. At the time of this enrichment pass CircuitLab publishes no public developer API, SDKs, or machine-readable API description, so this profile captures its public web identity only.

CircuitLab is profiled on the APIs.io network. Tagged areas include Company, Electronics, Circuit Simulation, Schematic Capture, and EDA.

CircuitLab’s developer surface includes documentation, support, engineering blog, pricing, and 4 more developer resources.

🌐 Visit website 📡 Source on GitHub

14.4/100 emerging ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0

0 APIs

CompanyElectronicsCircuit SimulationSchematic CaptureEDASimulationEngineeringEducation

Kin Score

Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0

Composite quality — 14.4/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 2.8 / 17

Access Clarity 5.4 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.3 / 9

Regulatory Posture 3.9 / 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

Regulatory Posture applies to this provider. Its tags matched the Education & Research 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.

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/. This rating is computed from github.com/api-evangelist/circuitlab: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: circuitlab
name: CircuitLab
description: CircuitLab, Inc. is an in-browser schematic capture and circuit simulation platform that lets engineers, students,
  educators, and hobbyists design and analyze analog and digital electronics systems before building a physical prototype.
  Running entirely in the browser with no installation, it offers schematic capture, mixed-signal SPICE-style simulation (DC,
  AC, transient, frequency-domain), custom device models and symbols, expression-based parameters, and shareable, exportable
  documentation. CircuitLab also publishes an electronics curriculum (CircuitLab Academy, the Ultimate Electronics textbook),
  community forums, and an electronics Q&A. It was surfaced as a portfolio company of a16z and Y Combinator. At the time of
  this enrichment pass CircuitLab publishes no public developer API, SDKs, or machine-readable API description, so this profile
  captures its public web identity only.
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://www.circuitlab.com/assets/images/og_logo.png
url: https://raw.githubusercontent.com/api-evangelist/circuitlab/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
- y-combinator
x-tier: stub
x-tier-reason: portfolio-lead
x-enrichment-note: No public API surface found (no OpenAPI/AsyncAPI/GraphQL, no /.well-known/*, no llms.txt, no SDKs/CLI).
  Enriched to web-identity + domain-security only.
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Electronics
- Circuit Simulation
- Schematic Capture
- EDA
- Simulation
- Engineering
- Education
apis: []
common:
- type: DomainSecurity
  url: security/circuitlab-domain-security.yml
- type: Website
  url: https://www.circuitlab.com/
- type: Documentation
  url: https://www.circuitlab.com/docs/
- type: Support
  url: https://www.circuitlab.com/forums/
- type: Blog
  url: https://www.circuitlab.com/blog/
- type: Pricing
  url: https://www.circuitlab.com/accounts/upgrade/
- type: TermsOfService
  url: https://www.circuitlab.com/legal/
- type: PrivacyPolicy
  url: https://www.circuitlab.com/legal/
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