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

30.4/100 thin ▬ flat Agent 3/100 human only saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

1 APIs

Company Quantum ComputingQuantum ControlQuantum SensingError SuppressionDeveloper Tools SDKGraphQL API

Kin Score

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

Composite quality — 30.4/100 · thin

Contract Quality 0.0 / 25

Developer Ergonomics 8.3 / 20

Access Clarity 8.7 / 20

Operational Transparency 5.8 / 13

Contract Governance 0.0 / 12

Discoverability 7.6 / 10

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

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/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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