Novu
Novu is open-source notification infrastructure that sends multi-channel messages - email, SMS, push, chat, and an in-app Inbox - from a single workflow trigger. A single event API call fans a notification out across channels defined in a workflow, with subscriber management, topics, layouts, digest/aggregation, 55+ provider integrations, and a real-time embeddable Inbox notification center powered by a WebSocket connection. Novu is self-hostable (MIT) and also available as Novu Cloud, with US (api.novu.co) and EU (eu.api.novu.co) regions.
Novu publishes 13 APIs on the APIs.io network, including Inbox Realtime API, Environments API, Events API, and 10 more. Tagged areas include Notifications, Multi-Channel, Email, SMS, and Push.
The Novu catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.
Novu’s developer surface includes authentication, documentation, engineering blog, and 8 more developer resources.
Kin Score
APIs 13
Individual APIs this provider publishes, each with its own machine-readable definition.
Novu Inbox Realtime API
Real-time WebSocket (Socket.IO) surface that pushes live Inbox updates to browser and mobile clients - notification_received, unseen_count_changed, and unread_count_changed even...
Novu Environments API
Environments and resource promotion.
Novu Events API
Trigger, bulk trigger, broadcast, and cancel workflow executions.
Novu Inbox API
The in-app notification feed for a subscriber.
Novu Integrations API
Channel provider configurations.
Novu Layouts API
Reusable email layout wrappers.
Novu Messages API
Individual channel messages produced by workflow executions.
Novu Notifications API
Activity feed of triggered workflow executions (events).
Novu Preferences API
Per-subscriber notification preferences.
Novu Subscribers API
Manage notification recipients and their credentials.
Novu Topics API
Group subscribers into addressable audiences.
Novu Translations API
Localization of notification content.
Novu Workflows API
Multi-channel notification workflow definitions.
Scroll for all 13
Open Collections 1
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
Novu API
OPEN COLLECTIONPricing Plans 1
Published pricing tiers and plan structures.
Rate Limits 1
Documented rate limits and quota policies.
Novu Co Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals for API financial operations.
Novu Co Finops
FINOPSEvent Specifications 1
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Novu Inbox Realtime (WebSocket / Socket.IO)
AsyncAPI 2.6 description of Novu's **Inbox real-time WebSocket** surface - the connection that powers the live bell, counts, and feed of Novu's embeddable in-app `
Spectral Rules 1
Spectral governance rulesets for linting and validating these APIs.
Novu API Rules
SPECTRALSecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Documentation 1
Reference material describing how the API behaves
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Commercial 2
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API