Q Ctrl

Q-CTRL builds infrastructure software to power the quantum future, delivering AI-driven quantum control, error-suppression, and performance-management tools that span quantum computing and quantum sensing. Its products — Boulder Opal (hardware design and control), Fire Opal (quantum error suppression), Black Opal (education), and Ironstone Opal (GPS-free quantum navigation) — are consumed primarily through official Python client libraries that authenticate against the Q-CTRL account service and call a hosted cloud GraphQL API at api.q-ctrl.com. Q-CTRL serves enterprise, defense, aerospace, and research customers and is ISO/IEC 27001:2022 certified.

Q Ctrl publishes 1 API on the APIs.io network. Tagged areas include Company, Quantum Computing, Quantum Control, Quantum Sensing, and Error Suppression.

Q Ctrl’s developer surface includes documentation, getting-started guide, signup flow, engineering blog, support, authentication, changelog, and 16 more developer resources.

🌐 Visit website 📡 Source on GitHub

32.4/100 thin ▬ flat Agent 3/100 human only Front door AI 4/6 moderate saas Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0

1 APIs

Company Quantum ComputingQuantum ControlQuantum SensingError SuppressionDeveloper Tools SDKGraphQL API

Kin Score

Kin Score How this is scored →
scored 2026-09-25 · rubric v0.23.0

Composite quality — 32.4/100 · thin

Contract Quality 0.0 / 21

Developer Ergonomics 7.1 / 17

Access Clarity 7.4 / 17

Operational Transparency 4.9 / 11

Contract Governance 0.0 / 10

Discoverability 6.2 / 9

Regulatory Posture 4.6 / 15

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 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/q-ctrl: 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 →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

Q-CTRL Cloud API

Hosted GraphQL API behind the Q-CTRL Boulder Opal and Fire Opal Python clients. Not published as a public OpenAPI/REST spec; accessed via the official SDKs with an account-issue...

Security Posture 4

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

Q Ctrl Authentication

apiKey · 1 scheme

SECURITY

Q Ctrl Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Q Ctrl Vulnerability Disclosure

contact published

SECURITY

Q Ctrl Trust Center

ISO/IEC 27001:2022, Cyber Essentials, NIST SP 800-171 Rev 3, DISP (Defence Industry Security Program)

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Lifecycle

Lifecycle

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 6

Authentication, authorization, and security posture

Security

Compliance

Authentication

DomainSecurity

VulnerabilityDisclosure

VulnerabilityDisclosure

TrustCenter

TrustCenter

Operate 3

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

ChangeLog

ChangeLog

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: q-ctrl
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:
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/q-ctrl.png
name: Q Ctrl
description: Q-CTRL builds infrastructure software to power the quantum future, delivering AI-driven quantum control, error-suppression,
  and performance-management tools that span quantum computing and quantum sensing. Its products — Boulder Opal (hardware
  design and control), Fire Opal (quantum error suppression), Black Opal (education), and Ironstone Opal (GPS-free quantum
  navigation) — are consumed primarily through official Python client libraries that authenticate against the Q-CTRL account
  service and call a hosted cloud GraphQL API at api.q-ctrl.com. Q-CTRL serves enterprise, defense, aerospace, and research
  customers and is ISO/IEC 27001:2022 certified.
url: https://raw.githubusercontent.com/api-evangelist/q-ctrl/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- dcvc
- sierra-ventures
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Quantum Computing
- Quantum Control
- Quantum Sensing
- Error Suppression
- Developer Tools
- SDK
- GraphQL API
apis:
- name: Q-CTRL Cloud API
  description: Hosted GraphQL API behind the Q-CTRL Boulder Opal and Fire Opal Python clients. Not published as a public OpenAPI/REST
    spec; accessed via the official SDKs with an account-issued API key.
  humanURL: https://docs.q-ctrl.com/
  baseURL: https://api.q-ctrl.com/graphql
  properties:
  - type: GraphQL
    url: https://api.q-ctrl.com/graphql
  - type: Documentation
    url: https://docs.q-ctrl.com/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://q-ctrl.com/
- type: DeveloperPortal
  url: https://docs.q-ctrl.com/
- type: Documentation
  url: https://docs.q-ctrl.com/
- type: GettingStarted
  url: https://docs.q-ctrl.com/boulder-opal/get-started
- type: GitHubOrganization
  url: https://github.com/qctrl
- type: SignUp
  url: https://accounts.q-ctrl.com/signup
- type: Blog
  url: https://q-ctrl.com/blog
- type: Support
  url: https://q-ctrl.com/contact
- type: TermsOfService
  url: https://q-ctrl.com/terms
- type: PrivacyPolicy
  url: https://q-ctrl.com/privacy
- type: StatusPage
  url: https://status.q-ctrl.com/
- type: Security
  url: https://q-ctrl.com/security
- type: Compliance
  url: https://q-ctrl.com/security
- type: Packages
  url: packages/q-ctrl-packages.yml
- type: SDKs
  url: packages/q-ctrl-packages.yml
- type: Authentication
  url: authentication/q-ctrl-authentication.yml
- type: Lifecycle
  url: lifecycle/q-ctrl-lifecycle.yml
- type: ChangeLog
  url: changelog/q-ctrl-changelog.yml
- type: LLMsTxt
  url: llms/q-ctrl-llms.txt
- type: DomainSecurity
  url: security/q-ctrl-domain-security.yml
- type: VulnerabilityDisclosure
  url: security/q-ctrl-vulnerability-disclosure.yml
- type: TrustCenter
  url: security/q-ctrl-trust-center.yml
- type: WellKnown
  url: well-known/q-ctrl-well-known.yml
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 9
  pass: local-v1

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