NATS
A high-performance, cloud-native messaging system for microservices, IoT, and edge computing. Provides pub-sub, request-reply, and queue-based messaging patterns with at-most-once and at-least-once delivery guarantees.
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 NATS the way a machine reads it — 37 machine-readable artifacts across 2 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 — NATS scores 42.5/100 (developing), with a separate agent-readiness read of 23/100 (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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title="NATS on API Evangelist — API profile and Kin Score">
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</a>More shapes, themes and sizes → · Score as JSON · How badges work
How we profile NATS
Each block below is one kind of artifact we hold for NATS. 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 15
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.
NATS Messaging API
Asynchronous messaging API supporting core pub-sub, request-reply, queue groups, and JetStream persistent messaging with streams, consumers, key-value stores, and object stores.
NATS JetStream Management API
The JetStream wire API provides a protocol-level management interface for configuring and operating JetStream streams, consumers, key-value buckets, and object stores. Requests ...
NATS Key-Value Store API
The NATS Key-Value Store API is a JetStream-backed abstraction that provides immediately consistent, persistent associative array semantics. Clients can create buckets, get, put...
NATS Object Store API
The NATS Object Store API is a JetStream-backed abstraction for storing and retrieving arbitrarily large binary objects using a chunking mechanism. Objects are identified by a b...
NATS Accounts API
The Accounts API from NATS — 1 operation(s) for accounts.
NATS Clustering API
Cluster, gateway, and leaf node endpoints
NATS Connections API
The Connections API from NATS — 1 operation(s) for connections.
NATS Gateways API
The Gateways API from NATS — 1 operation(s) for gateways.
NATS Health API
The Health API from NATS — 1 operation(s) for health.
NATS JetStream API
The JetStream API from NATS — 1 operation(s) for jetstream.
NATS Leaf Nodes API
The Leaf Nodes API from NATS — 1 operation(s) for leaf nodes.
NATS Routes API
The Routes API from NATS — 1 operation(s) for routes.
NATS Server API
The Server API from NATS — 2 operation(s) for server.
NATS Subscriptions API
The Subscriptions API from NATS — 1 operation(s) for subscriptions.
NATS Monitoring API
Server monitoring and status endpoints
Scroll within the panel for all 15 ·
Open Collections 13
Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
API Collection
OPEN COLLECTIONNATS Monitoring HTTP Accounts API
OPEN COLLECTIONNATS Monitoring HTTP Accounts Clustering API
OPEN COLLECTIONNATS Monitoring HTTP Accounts Connections API
OPEN COLLECTIONNATS Monitoring HTTP Accounts Gateways API
OPEN COLLECTIONNATS Monitoring HTTP Accounts Health API
OPEN COLLECTIONNATS Monitoring HTTP Accounts JetStream API
OPEN COLLECTIONNATS Monitoring HTTP Accounts Leaf Nodes API
OPEN COLLECTIONNATS HTTP Accounts Monitoring API
OPEN COLLECTIONNATS Monitoring HTTP API
OPEN COLLECTIONNATS Monitoring HTTP Accounts Routes API
OPEN COLLECTIONNATS Monitoring HTTP Accounts Server API
OPEN COLLECTIONNATS Monitoring HTTP Accounts Subscriptions API
OPEN COLLECTIONScroll within the panel for all 13 ·
Pricing 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.
Nats Plans Pricing
PLANSRate 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.
Nats Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.
Cost, billing, and metering signals for API financial operations.
Nats Finops
FINOPSEvent Specifications 1
Not every API is request/response. AsyncAPI describes the event-driven and streaming side — the webhooks and channels — so the asynchronous half of the interface is documented the same way the synchronous half is.
AsyncAPI definitions for this provider's event-driven and streaming APIs.
NATS Core and JetStream Messaging API
NATS provides cloud-native messaging with core pub-sub, request-reply, and queue group patterns, plus JetStream for persistent streaming with streams, consumers, key-value store...
ASYNCAPISpectral Rules 2
Governance rulesets we run against this provider's specs — the automated checks behind parts of the score. Profiling them makes the quality bar explicit and re-runnable, not a matter of opinion.
NATS API Rules
SPECTRALNATS API Rules
SPECTRALJSON Schema 1
Standalone JSON Schema definitions describe the data models behind the API. We profile them so the shapes are validatable on their own — useful long after a single request is forgotten.
Standalone JSON Schema definitions for this provider's data models.
NATS JetStream Stream Configuration
JSON SCHEMASecurity Posture 1
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 NATS — 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 1
Portal, sign-up, and the first successful call
Documentation 5
Reference material describing how the API behaves
Agent Surfaces 2
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 1
Pagination, idempotency, versioning, errors, and events
Build 5
SDKs, sample code, and the tooling you integrate with
Access & Security 1
Authentication, authorization, and security posture
Operate 5
Status, limits, changes, and where to get help
Commercial 1
Pricing, plans, and the legal terms of use
Company 2
The organization behind the API
Other 1
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/nats · machine-readable index on apis.io
This is an independent, third-party profile of NATS, 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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