Phasecraft

Phasecraft is a quantum algorithms company building software that combines classical and quantum computing to solve real-world problems in materials discovery, advanced biochemistry, and optimization. Its algorithms are engineered to run efficiently across multiple quantum hardware platforms, and its published results include scalable approaches to the Fermi-Hubbard model and QAOA-based optimization. Founded by Profs. Ashley Montanaro (CEO) and Toby Cubitt (CTO), the company operates from London, Bristol, and Washington DC, and is backed by Playground Global. Phasecraft exposes no public developer API; its programmatic surface is limited to open research code on GitHub and two interactive web tools (a materials database and an optimization graph library).

Phasecraft is profiled on the APIs.io network. Tagged areas include Company, Compute, Quantum Computing, Quantum Algorithms, and Materials Discovery.

Phasecraft’s developer surface includes support and 7 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

10.8/100 minimal ▬ flat Agent 0/100 human only Front door AI 1/6 silent Heartbeat 0/100 dormant saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

0 APIs

Company Compute Quantum ComputingQuantum AlgorithmsMaterials DiscoveryOptimization Deep Tech

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 10.8/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.8 / 17

Access Clarity 3.6 / 17

Operational Transparency 0.3 / 11

Contract Governance 0.0 / 10

Discoverability 4.7 / 9

Regulatory Posture 2.1 / 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

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes

13 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 0.0 — up to +25.0 composite points
Developer Ergonomics scores 4.8 — up to +19.0 composite points
Access Clarity scores 21.1 — up to +15.8 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/phasecraft/apis.yml: open an issue on github.com/api-evangelist/phasecraft to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Quantum Computing (hardware, cloud and software)	standard	17.2 (thin)	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Security Posture 1

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

Phasecraft Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Research

Research

Source (apis.yml)

aid: phasecraft
name: Phasecraft
description: Phasecraft is a quantum algorithms company building software that combines classical and quantum computing to
  solve real-world problems in materials discovery, advanced biochemistry, and optimization. Its algorithms are engineered
  to run efficiently across multiple quantum hardware platforms, and its published results include scalable approaches to
  the Fermi-Hubbard model and QAOA-based optimization. Founded by Profs. Ashley Montanaro (CEO) and Toby Cubitt (CTO), the
  company operates from London, Bristol, and Washington DC, and is backed by Playground Global. Phasecraft exposes no public
  developer API; its programmatic surface is limited to open research code on GitHub and two interactive web tools (a materials
  database and an optimization graph library).
url: https://raw.githubusercontent.com/api-evangelist/phasecraft/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- playground-global
x-tier: stub
x-tier-reason: portfolio-lead
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:
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Compute
- Quantum Computing
- Quantum Algorithms
- Materials Discovery
- Optimization
- Deep Tech
image: https://framerusercontent.com/images/F3pzaH3tv1rtpJgI6FmHlMI7M.jpg
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.phasecraft.io/
- type: GitHubOrganization
  url: https://github.com/phasecraft
- type: Research
  url: https://www.phasecraft.io/research
- type: Support
  url: https://www.phasecraft.io/contact
- type: PrivacyPolicy
  url: https://www.phasecraft.io/privacy-policy
- type: TermsOfService
  url: https://www.phasecraft.io/terms-of-use
- type: DomainSecurity
  url: security/phasecraft-domain-security.yml
- type: LLMsTxt
  url: llms/phasecraft-llms.txt
x-enrichment:
  date: '2026-07-20'
  status: nochange
  artifacts_added: 0
  pass: local-v1

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