# Quantinuum

**Canonical:** https://apis.io/providers/quantinuum/  
**Website:** https://www.quantinuum.com/  
**APIs profiled:** 9

Quantinuum is an integrated quantum computing company formed by the 2021 merger of Honeywell Quantum Solutions and Cambridge Quantum. It builds trapped-ion (QCCD) quantum computers — the H1, H2, and Helios System Models — and develops the full software stack that runs on them: the Nexus cloud platform, the TKET quantum compiler, the InQuanto computational chemistry package, the lambeq quantum natural language processing toolkit, the Guppy quantum programming language, the Selene emulation framework, and the Quantum Origin verifiable randomness service. Programmatic access to Quantinuum systems is delivered through the Nexus platform (Python client `qnexus` plus a REST/OpenAPI surface) and via partner clouds; circuits are described in OpenQASM 2.0 and the Quantum Intermediate Representation (QIR).

## Kin Score — 20.4 / 100 (emerging)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 20.4).

| Facet | Score |
|---|---|
| Discoverability | 64.8 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 2.6 |
| Developer Ergonomics | 54.8 |
| Commercial Clarity | 13.2 |
| Access Clarity | 13.2 |

## Agent readiness — 0.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## APIs (9)

- **Quantinuum Nexus** — Nexus is Quantinuum's all-in-one quantum computing cloud platform. It brokers access to Quantinuum H-Series hardware (H1, H2, Helios) and to partner backends including IBM Quant...
- **Quantinuum Systems (H-Series)** — The Quantinuum Systems API exposes the H-Series trapped-ion (QCCD) quantum computers — System Model H1, System Model H2, and the next-generation Helios — for circuit submission....
- **TKET** — TKET is Quantinuum's optimizing quantum compiler. The Python interface `pytket` and the C++ core `tket` provide gate-level circuit construction, hardware-agnostic optimization p...
- **InQuanto** — InQuanto is Quantinuum's computational quantum chemistry platform for molecular and materials simulations on near-term and fault-tolerant quantum computers. It implements VQE, q...
- **lambeq** — lambeq is Quantinuum's open-source Python toolkit for Quantum Natural Language Processing (QNLP). It converts sentences into string diagrams (DisCoCat / DisCoCirc), rewrites the...
- **Guppy** — Guppy (`guppylang`) is Quantinuum's Pythonic quantum-classical programming language. Guppy programs compile through the HUGR hierarchical intermediate representation and target ...
- **Selene** — Selene is Quantinuum's plugin-extensible emulator for hybrid quantum computation. It simulates the behavior of Quantinuum H-Series hardware including mid-circuit measurement, co...
- **Quantum Origin** — Quantum Origin is Quantinuum's verifiable quantum random number generation service, delivering cryptographically strong entropy seeded by quantum measurements for use in PKI, ke...
- **Qermit** — Qermit is a Python module for running error-mitigation protocols (probabilistic error cancellation, zero-noise extrapolation, Clifford data regression, dynamical decoupling, etc...

## Security (1)

- **Quantinuum Domain Security** — TLSv1.3 · HSTS · DMARC

## Tags

Quantum Computing, Trapped Ion, Quantum Hardware, Quantum Software, Quantum Compiler, Quantum Chemistry, Quantum Natural Language Processing, Quantum Random Number Generator, QIR, OpenQASM, Cloud Platform

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/quantinuum/). Scores are computed from the provider's own public artifacts under a published rubric.