Nstream

Nstream is the company behind SwimOS, an open-source platform for building streaming data applications. Instead of polling databases, Nstream keeps application state continuously in memory as stateful "web agents" that ingest events from any source, compute in real time, and stream incremental updates to API clients and live user interfaces. The stack spans a JVM runtime (SwimOS for Java), TypeScript/JavaScript UI toolkits, a Rust runtime (swim-rust), and standalone WARP streaming clients, plus the commercial Nstream Platform and Nstream Jet low-code tooling for building real-time applications used in asset monitoring, fraud detection, customer 360, and business visibility across retail, financial services, telecommunications, and transportation & logistics.

Nstream is profiled on the APIs.io network. Tagged areas include Company, Streaming, Real-Time, Event Streaming, and Stateful Services.

Nstream’s developer surface includes documentation, getting-started guide, engineering blog, support, pricing, and 12 more developer resources.

🌐 Visit website 📡 Source on GitHub

22.0/100 emerging ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyStreamingReal-TimeEvent StreamingStateful ServicesStreaming APIsData ConnectorsOpen SourceWebSocketsSwimOS

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 22.0/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 8.3 / 20

Commercial Clarity 6.3 / 20

Operational Transparency 0.7 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

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

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/nstream: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

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

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Components

Components

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: nstream
name: Nstream
description: Nstream is the company behind SwimOS, an open-source platform for building streaming data applications. Instead
  of polling databases, Nstream keeps application state continuously in memory as stateful "web agents" that ingest events
  from any source, compute in real time, and stream incremental updates to API clients and live user interfaces. The stack
  spans a JVM runtime (SwimOS for Java), TypeScript/JavaScript UI toolkits, a Rust runtime (swim-rust), and standalone WARP
  streaming clients, plus the commercial Nstream Platform and Nstream Jet low-code tooling for building real-time applications
  used in asset monitoring, fraud detection, customer 360, and business visibility across retail, financial services, telecommunications,
  and transportation & logistics.
url: https://raw.githubusercontent.com/api-evangelist/nstream/refs/heads/main/apis.yml
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://www.nstream.io/assets/images/favicon.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- dcvc
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Streaming
- Real-Time
- Event Streaming
- Stateful Services
- Streaming APIs
- Data Connectors
- Open Source
- WebSockets
- SwimOS
apis: []
common:
- type: DomainSecurity
  url: security/nstream-domain-security.yml
- type: Website
  url: https://www.nstream.io/
- type: DeveloperPortal
  url: https://www.nstream.io/docs/
- type: Documentation
  url: https://www.nstream.io/docs/
- type: Documentation
  url: https://www.swimos.org/
- type: GettingStarted
  url: https://www.swimos.org/tutorials/
- type: Blog
  url: https://www.nstream.io/blog/
- type: Support
  url: https://www.nstream.io/contact/
- type: Pricing
  url: https://www.nstream.io/pricing/
- type: TermsOfService
  url: https://www.nstream.io/terms-conditions/
- type: PrivacyPolicy
  url: https://www.nstream.io/privacy-policy/
- type: GitHubOrganization
  url: https://github.com/swimos
- type: GitHubOrganization
  url: https://github.com/nstreamio
- type: Packages
  url: packages/nstream-packages.yml
- type: SDKs
  url: packages/nstream-packages.yml
- type: Components
  url: components/nstream-components.yml
- type: LLMsTxt
  url: llms/nstream-llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 5
  pass: local-v1