Quandela
Quandela is a Paris-region (Massy, France) photonic quantum computing company building modular, scalable, energy-efficient quantum systems driven by deterministic single-photon sources. Its hardware lineup includes Ascella (its first cloud-accessible system), Belenos (a 12-qubit second-generation machine), Canopus, and Mosaiq (its flagship prototyping platform), alongside Prometheus single-photon sources and the Entropy quantum random number generator. Quandela develops Perceval, the open-source Python framework for programming photonic quantum computers, distributed on PyPI as perceval-quandela with the perceval-interop bridges to Qiskit, QuTiP, cQASM and myQLM and the exqalibur native optimisation kernel. It operates Quandela Cloud, which — contrary to an earlier reading of this profile — DOES publish a real, anonymously readable REST contract: OpenAPI 3.0.3 at https://api.cloud.quandela.com/openapi.json, version v2.8.0-rc4, with 55 paths, 59 operations and 54 component schemas, plus a Quantum Toolbox sub-specification at /qt-openapi.json. The surface covers Perceval job submission (submit-then-poll, with the circuit carried as an SDK-serialised opaque payload), a self-service Cloud Job Token lifecycle with a per-platform credit ledger, five typed Quantum Toolbox primitives (Chemistry VQE, Custom VQE, CVaR VQE, Graph DSI, Graph Isomorphism) each with a paired cost estimator, and the Entropy QRNG, whose draws return CHSH and min-entropy certification. Authentication is a single declared bearer scheme covering two distinct credentials — an account token from account.quandela.com and a Cloud Job Token minted over the API. Quandela also runs a Quantum Acceleration Program for enterprise pilots in cybersecurity, pharma, chemistry, logistics, finance, energy and aerospace, and publishes a 2024-2030 roadmap to fault-tolerant quantum computing.
Real signal across most facets with visible, nameable gaps — the contract exists but is thin, or the portal is good while governance and commercial terms are absent.
API Evangelist profiles Quandela the way a machine reads it — 14 machine-readable artifacts across 8 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Quandela scores 48.1/100 (developing), with a separate agent-readiness read of 28/100 (agent aware). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-09-08 · rubric v0.20.0
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How we profile Quandela
Each block below is one kind of artifact we hold for Quandela. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 6
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
Quandela Api - Job Token API
APIs related to job token
Quandela Api - Perceval Job API
Operations about job - Authenticate by `Cloud Job Token`
Quandela Api - Perceval Job Token API
Operations about job token - Authenticate by `Cloud Job Token`
Quandela Platform API
Service root, health check and specification endpoints
Quandela QRNG API
Quantum Random Number generation
Quandela Quantum Toolbox API
Quantum Toolbox entrypoints
Arazzo Workflows 3
Real integrations are rarely a single call. Arazzo describes the multi-step sequences — auth, then create, then confirm — so both a human and an agent can follow the choreography, not just the endpoints.
Multi-step API workflows described with the Arazzo specification.
Estimate then run a Chemistry VQE workload on Quandela Quantum Toolbox
Price a Chemistry VQE workload with the estimator before committing credits, check the Quantum Toolbox concurrency ceiling, submit, poll and collect.
ARAZZORotate and audit a Quandela Cloud Job Token
Mint a replacement Cloud Job Token, read the outgoing token's per-platform consumption ledger, then revoke and delete it — the full credential rotation Quandela supports entirel...
ARAZZOSubmit a Perceval job to Quandela Cloud and collect the result
Mint a Cloud Job Token, verify account capacity, submit a photonic-circuit job, poll to completion, then retrieve the result and the submission record.
ARAZZOPricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the things the Kin Score reads for access clarity — renamed from commercial clarity in rubric 0.12, because a free statutory interface has access terms and no commercial ones.
Published pricing tiers and plan structures.
Rate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Quandela Rate Limits
RATE LIMITSSecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.
Recommended x-agentic-access execution contracts for AI agents.
Resources
Every other property we hold for Quandela — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 4
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 9
MCP servers, agent skills, and machine-readable catalogs
Scroll within the panel for all 9 ·
Design & Contract 8
Pagination, idempotency, versioning, errors, and events
Scroll within the panel for all 8 ·
Build 7
SDKs, sample code, and the tooling you integrate with
Scroll within the panel for all 7 ·
Access & Security 2
Authentication, authorization, and security posture
Learn 3
Tutorials, courses, talks, and written guidance
Operate 10
Status, limits, changes, and where to get help
Scroll within the panel for all 10 ·
Commercial 4
Pricing, plans, and the legal terms of use
Company 5
The organization behind the API
Other 10
Properties that don't map to a standard resource type
Scroll within the panel for all 10 ·
← All providers · Data indexed from github.com/api-evangelist/quandela · machine-readable index on apis.io
This is an independent, third-party profile of Quandela, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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