Quasar

Quasar (QuasarDB, by Bureau 14) is a distributed, high-performance time-series database built for the hardest data problems, where precision, speed, scale, and accuracy must hold at the same time. It combines live ingestion, lossless-compressed historical retention, and heavy analytics on a single distributed system, deployed in cloud, edge, and appliance form across aerospace and defense, finance, industrial operations, and scientific research. QuasarDB exposes a JWT-authenticated REST API plus native client libraries in Python, Java, Go, .NET, C, PHP, R, and Ruby, and integrates with Grafana, Kafka, Spark, NATS, Prometheus, and Dask.

Quasar publishes 10 API contracts indexed on the APIs.io network, including Cluster API, Login API, Max In Buffer Size API, and 7 more. Tagged areas include Company, Time Series Database, Database, Analytics, and Infrastructure.

The Quasar catalog on APIs.io includes 1 Spectral governance ruleset.

Quasar’s developer surface includes documentation, API reference, getting-started guide, engineering blog, pricing, support, CLI, and 19 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

38.0/100 thin ▬ flat Agent 28/100 agent aware Front door AI 3/6 light Heartbeat 94/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 published contract 2 Agent Skills

Company Time Series Database Database Analytics Infrastructure Real-Time Data Aerospace Finance

Kin Score

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

Composite quality — 38.0/100 · thin

Contract Quality 7.1 / 19

Developer Ergonomics 11.0 / 15

Access Clarity 2.8 / 15

Operational Transparency 0.3 / 10

Contract Governance 2.9 / 9

Discoverability 4.8 / 8

Regulatory Posture 2.5 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 28/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)

7 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 18.4 — up to +16.3 composite points
Contract Quality scores 38.1 — up to +15.5 composite points
Operational Transparency scores 2.6 — up to +12.7 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/quasar/apis.yml: open an issue on github.com/api-evangelist/quasar 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 →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 10

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

Quasar Cluster API

Operational statistics about the QuasarDB cluster

Quasar Login API

The Login API from Quasar — 1 operation(s) for login.

Quasar Max In Buffer Size API

The max-in-buffer-size API from Quasar — 1 operation(s) for max-in-buffer-size.

Quasar Option API

The option API from Quasar — 2 operation(s) for option.

Quasar Parallelism API

The parallelism API from Quasar — 1 operation(s) for parallelism.

Quasar Prometheus API

The Prometheus API from Quasar — 2 operation(s) for prometheus.

Quasar Query API

The query API from Quasar — 1 operation(s) for query.

Quasar Status API

The Status API from Quasar — 2 operation(s) for status.

Quasar Tables API

The Tables API from Quasar — 1 operation(s) for tables.

Quasar Tags API

The tags API from Quasar — 1 operation(s) for tags.

Scroll for all 10

Open Collections 10

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

QuasarDB cluster API

OPEN COLLECTION

QuasarDB cluster Login API

OPEN COLLECTION

QuasarDB cluster max-in-buffer-size API

OPEN COLLECTION

QuasarDB cluster option API

OPEN COLLECTION

QuasarDB cluster parallelism API

OPEN COLLECTION

QuasarDB cluster Prometheus API

OPEN COLLECTION

QuasarDB cluster query API

OPEN COLLECTION

QuasarDB cluster Status API

OPEN COLLECTION

QuasarDB cluster Tables API

OPEN COLLECTION

QuasarDB cluster tags API

OPEN COLLECTION

Scroll for all 10

Agent Skills 2

Packaged agent skills for driving this provider's APIs from an AI assistant.

Monitor QuasarDB cluster health

AGENT SKILL

Authenticate and run a QuasarDB query

AGENT SKILL

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Quasar API Rules

45 rules · 39 errors 1 warnings 5 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Quasar Rest Overlay

4 actions · documentation · quasar-rest-openapi-original.json

DERIVED

Security Posture 3

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

Quasar Authentication

apiKey · 2 schemes

SECURITY

Quasar Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Quasar Trust Center

SOC 2

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Quasar Agentic Access

14 operations · 3 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

AgentSkill

LLMsTxt

AgenticAccess

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

DataModel

Conformance

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

SDKs

CLI

Access & Security 4

Authentication, authorization, and security posture

Authentication

Compliance

TrustCenter

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 1

Pricing, plans, and the legal terms of use

Pricing

Pricing

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: quasar
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - openapi
  - 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: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/quasar.png
name: Quasar
description: Quasar (QuasarDB, by Bureau 14) is a distributed, high-performance time-series database built for the hardest
  data problems, where precision, speed, scale, and accuracy must hold at the same time. It combines live ingestion, lossless-compressed
  historical retention, and heavy analytics on a single distributed system, deployed in cloud, edge, and appliance form across
  aerospace and defense, finance, industrial operations, and scientific research. QuasarDB exposes a JWT-authenticated REST
  API plus native client libraries in Python, Java, Go, .NET, C, PHP, R, and Ruby, and integrates with Grafana, Kafka, Spark,
  NATS, Prometheus, and Dask.
url: https://raw.githubusercontent.com/api-evangelist/quasar/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- partech
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Time Series Database
- Database
- Analytics
- Infrastructure
- Real-Time Data
- Aerospace
- Finance
apis:
- aid: quasar:quasar-cluster-api
  name: Quasar Cluster API
  description: Operational statistics about the QuasarDB cluster
  humanURL: https://doc.quasar.ai/master/user-guide/api/rest.html
  tags:
  - Cluster
  tags_raw:
  - cluster
  properties:
  - type: OpenAPI
    url: openapi/quasar-cluster-api-openapi.yml
- aid: quasar:quasar-login-api
  name: Quasar Login API
  description: The Login API from Quasar — 1 operation(s) for login.
  humanURL: https://doc.quasar.ai/master/user-guide/api/rest.html
  tags:
  - Login
  properties:
  - type: OpenAPI
    url: openapi/quasar-login-api-openapi.yml
- aid: quasar:quasar-max-in-buffer-size-api
  name: Quasar Max In Buffer Size API
  description: The max-in-buffer-size API from Quasar — 1 operation(s) for max-in-buffer-size.
  humanURL: https://doc.quasar.ai/master/user-guide/api/rest.html
  tags:
  - max-in-buffer-size
  properties:
  - type: OpenAPI
    url: openapi/quasar-max-in-buffer-size-api-openapi.yml
- aid: quasar:quasar-option-api
  name: Quasar Option API
  description: The option API from Quasar — 2 operation(s) for option.
  humanURL: https://doc.quasar.ai/master/user-guide/api/rest.html
  tags:
  - Option
  tags_raw:
  - option
  properties:
  - type: OpenAPI
    url: openapi/quasar-option-api-openapi.yml
- aid: quasar:quasar-parallelism-api
  name: Quasar Parallelism API
  description: The parallelism API from Quasar — 1 operation(s) for parallelism.
  humanURL: https://doc.quasar.ai/master/user-guide/api/rest.html
  tags:
  - parallelism
  properties:
  - type: OpenAPI
    url: openapi/quasar-parallelism-api-openapi.yml
- aid: quasar:quasar-prometheus-api
  name: Quasar Prometheus API
  description: The Prometheus API from Quasar — 2 operation(s) for prometheus.
  humanURL: https://doc.quasar.ai/master/user-guide/api/rest.html
  tags:
  - Prometheus
  properties:
  - type: OpenAPI
    url: openapi/quasar-prometheus-api-openapi.yml
- aid: quasar:quasar-query-api
  name: Quasar Query API
  description: The query API from Quasar — 1 operation(s) for query.
  humanURL: https://doc.quasar.ai/master/user-guide/api/rest.html
  tags:
  - Query
  tags_raw:
  - query
  properties:
  - type: OpenAPI
    url: openapi/quasar-query-api-openapi.yml
- aid: quasar:quasar-status-api
  name: Quasar Status API
  description: The Status API from Quasar — 2 operation(s) for status.
  humanURL: https://doc.quasar.ai/master/user-guide/api/rest.html
  tags:
  - Status
  properties:
  - type: OpenAPI
    url: openapi/quasar-status-api-openapi.yml
- aid: quasar:quasar-tables-api
  name: Quasar Tables API
  description: The Tables API from Quasar — 1 operation(s) for tables.
  humanURL: https://doc.quasar.ai/master/user-guide/api/rest.html
  tags:
  - Tables
  properties:
  - type: OpenAPI
    url: openapi/quasar-tables-api-openapi.yml
- aid: quasar:quasar-tags-api
  name: Quasar Tags API
  description: The tags API from Quasar — 1 operation(s) for tags.
  humanURL: https://doc.quasar.ai/master/user-guide/api/rest.html
  tags:
  - Tags
  tags_raw:
  - tags
  properties:
  - type: OpenAPI
    url: openapi/quasar-tags-api-openapi.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Overlay
  url: overlays/quasar-rest-overlay.yaml
- type: DeveloperPortal
  url: https://doc.quasar.ai/master/
- type: Documentation
  url: https://doc.quasar.ai/master/
- type: APIReference
  url: https://doc.quasar.ai/master/user-guide/api/rest.html
- type: GettingStarted
  url: https://doc.quasar.ai/master/user-guide/howto/index.html
- type: GitHubOrganization
  url: https://github.com/bureau14
- type: Blog
  url: https://quasar.ai/blog-news/
- type: Pricing
  url: https://quasar.ai/deployment-pricing/
- type: Support
  url: https://quasar.ai/support-services/
- type: Packages
  url: packages/quasar-packages.yml
- type: SDKs
  url: packages/quasar-packages.yml
- type: CLI
  url: cli/quasar-cli.yml
- type: X-MCPServerCandidate
  url: mcp/quasar-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/quasar-llms.txt
- type: Authentication
  url: authentication/quasar-authentication.yml
- type: Conventions
  url: conventions/quasar-conventions.yml
- type: ErrorCatalog
  url: errors/quasar-problem-types.yml
- type: Lifecycle
  url: lifecycle/quasar-lifecycle.yml
- type: DataModel
  url: data-model/quasar-data-model.yml
- type: Conformance
  url: conformance/quasar-conformance.yml
- type: Compliance
  url: https://trust.quasar.ai/
- type: AgenticAccess
  url: agentic-access/quasar-agentic-access.yml
- type: TrustCenter
  url: security/quasar-trust-center.yml
- type: DomainSecurity
  url: security/quasar-domain-security.yml
- type: Website
  url: https://quasar.ai/
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 15
  pass: local-v1

Quasar API — frequently asked questions

Does Quasar have an API?

Yes. APIs.io lists 10 APIs from Quasar, including Quasar Cluster API, Quasar Login API and Quasar Max In Buffer Size API, and 7 more.

Is there an OpenAPI specification for the Quasar API?

Yes. APIs.io indexes 10 OpenAPI specifications for Quasar, each linked for download from this page.

How do I authenticate with the Quasar API?

Quasar uses bearer-token authentication (apiKey · 2 schemes). The details are profiled on APIs.io as Quasar Authentication.

Is the Quasar API ready for AI agents?

Quasar has a Kin Score of 38.0 out of 100 (thin) and an Agent Readiness score of 28.0 (agent-aware), scored by API Evangelist on 2026-11-06.

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