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 APIs 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.

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

🌐 Visit website 📡 Source on GitHub

38.0/100 thin ▬ flat Agent 26/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

1 APIs

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

Kin Score

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

Composite quality — 38.0/100 · thin

Contract Quality 9.3 / 23

Developer Ergonomics 13.2 / 18

Access Clarity 3.3 / 18

Operational Transparency 0.3 / 12

Contract Governance 2.0 / 11

Discoverability 6.8 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 26/100 · 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

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.

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/quasar: 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 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 11

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

API Collection

OPEN COLLECTION

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 11

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

12 operations · 4 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: '2026-09-03'
  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
  baseURL: https://quasar.ai
  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
  baseURL: https://quasar.ai
  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
  baseURL: https://quasar.ai
  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
  baseURL: https://quasar.ai
  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
  baseURL: https://quasar.ai
  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
  baseURL: https://quasar.ai
  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
  baseURL: https://quasar.ai
  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
  baseURL: https://quasar.ai
  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
  baseURL: https://quasar.ai
  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
  baseURL: https://quasar.ai
  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

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