Quantum Circuits

Quantum Circuits, Inc. is a quantum computing hardware company (a Yale University spinout) building superconducting quantum systems with built-in error detection. Its dual-rail cavity qubits pair Quantum Error Detection (QED), Real-Time Control Flow (RTCF), and Error Detection Handling (EDH), and its Aqumen Seeker QPU (introduced November 2024) targets stable, repeatable, fault-tolerant quantum computation. The company engages early users through a Strategic Quantum Release (SQR) program that includes a simulator and access to Aqumen Seeker systems, rather than a public self-serve API. Surfaced as a portfolio company of Canaan Partners and added to the API Evangelist network.

Quantum Circuits is profiled on the APIs.io network. Tagged areas include Company, Quantum Computing, Quantum Hardware, Superconducting Qubits, and Error Correction.

Quantum Circuits’ developer surface includes engineering blog, support, and 3 more developer resources.

🌐 Visit website 📡 Source on GitHub

10.6/100 minimal ▬ flat Agent 0/100 human only saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

Company Quantum Computing Quantum Hardware Superconducting Qubits Error Correction Deep Tech Research

Kin Score

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

Composite quality — 10.6/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 1.4 / 20

Access Clarity 4.2 / 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.

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Resources

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: quantum-circuits
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/quantum-circuits.png
name: Quantum Circuits
description: Quantum Circuits, Inc. is a quantum computing hardware company (a Yale University spinout) building superconducting
  quantum systems with built-in error detection. Its dual-rail cavity qubits pair Quantum Error Detection (QED), Real-Time
  Control Flow (RTCF), and Error Detection Handling (EDH), and its Aqumen Seeker QPU (introduced November 2024) targets stable,
  repeatable, fault-tolerant quantum computation. The company engages early users through a Strategic Quantum Release (SQR)
  program that includes a simulator and access to Aqumen Seeker systems, rather than a public self-serve API. Surfaced as
  a portfolio company of Canaan Partners and added to the API Evangelist network.
url: https://raw.githubusercontent.com/api-evangelist/quantum-circuits/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- canaan-partners
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Quantum Computing
- Quantum Hardware
- Superconducting Qubits
- Error Correction
- Deep Tech
- Research
apis: []
common:
- type: Website
  url: https://quantumcircuits.com/
- type: Blog
  url: https://quantumcircuits.com/perspective/
- type: Support
  url: https://quantumcircuits.com/contact-us/
- type: TermsOfService
  url: https://quantumcircuits.com/terms-of-use/
- type: PrivacyPolicy
  url: https://quantumcircuits.com/privacy-policy/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-20'
  status: minimal
  artifacts_added: 0
  pass: local-v1

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