Rivet

Rivet is infrastructure for the agentic era, providing durable, stateful compute for AI agents and realtime applications. Its core primitive, Rivet Actors (RivetKit), is a runtime for long-lived processes that co-locate in-memory state with compute, support built-in WebSockets, workflows, queues, scheduling and cron, hibernate when idle, and scale from zero to thousands of instances across a global edge network. Rivet also ships agentOS, a lightweight WebAssembly-powered alternative to sandboxes for running coding agents, and Rivet Cloud, a managed serverless platform. RivetKit is open source (Apache-2.0), self-hostable on Postgres, the file system, or FoundationDB, with client SDKs for JavaScript, React, Rust, Swift and SwiftUI, a CLI, an OpenAPI-described gateway/inspector HTTP API and an AsyncAPI WebSocket protocol. Rivet is backed by Y Combinator and a16z Speedrun.

Rivet publishes 2 API contracts indexed on the APIs.io network: Actors API and Gateway API. Tagged areas include Company, Infrastructure, Actors, Stateful Compute, and AI Agents.

Rivet’s developer surface includes engineering blog, documentation, API reference, getting-started guide, changelog, pricing, signup flow, and 23 more developer resources.

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40.1/100 developing ▬ flat Agent 22/100 agent aware Front door AI 5/6 prominent saas Full breakdown ↓
scored 2026-10-17 · rubric v0.24.0

1 published contract

Company Infrastructure ActorsStateful ComputeAI Agents Real-Time Serverless Edge WebSocket Durable Execution Developer Tools

Kin Score

Kin Score How this is scored →
scored 2026-10-17 · rubric v0.24.0

Composite quality — 40.1/100 · developing

Contract Quality 6.5 / 19

Developer Ergonomics 11.8 / 15

Access Clarity 1.6 / 15

Operational Transparency 1.8 / 10

Contract Governance 0.4 / 9

Discoverability 5.5 / 8

Regulatory Posture 2.5 / 15

Create-or-Update Ergonomics 3.9 / 10

Agent readiness — 22/100 · 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 0 / 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

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/.

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/rivet: 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 →

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.

WebSockets

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

APIs 2

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

Rivet Actors API

The Actors API from Rivet — 3 operation(s) for actors.

Rivet Gateway API

The Gateway API from Rivet — 12 operation(s) for gateway.

Open Collections 3

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

API Collection

OPEN COLLECTION

RivetKit Actors API

OPEN COLLECTION

RivetKit Actors Gateway API

OPEN COLLECTION

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.

Rivet Rivetkit Overlay

3 actions · servers · rivet-rivetkit-openapi.json

UNRECORDED

Security Posture 2

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

Rivet Authentication

bearer/custom-token · 2 schemes

SECURITY

Rivet Domain Security

TLSv1.3

SECURITY

Agentic Access 1

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

Rivet Agentic Access

24 operations · 10 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

AsyncAPI

AsyncAPI

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

X-MCPServerCandidate

X-MCPServerCandidate

AgentSkill

AgentSkill

LLMsTxt

LLMsTxt

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Lifecycle

Conventions

ErrorCatalog

Conformance

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

SDKs

Packages

CLI

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 4

Status, limits, changes, and where to get help

ChangeLog

StatusPage

Support

ChangeLog

Commercial 1

Pricing, plans, and the legal terms of use

Pricing

Pricing

Company 4

The organization behind the API

Blog

BlogRSS

Website

Blog

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: rivet
name: Rivet
description: Rivet is infrastructure for the agentic era, providing durable, stateful compute for AI agents and realtime applications.
  Its core primitive, Rivet Actors (RivetKit), is a runtime for long-lived processes that co-locate in-memory state with compute,
  support built-in WebSockets, workflows, queues, scheduling and cron, hibernate when idle, and scale from zero to thousands
  of instances across a global edge network. Rivet also ships agentOS, a lightweight WebAssembly-powered alternative to sandboxes
  for running coding agents, and Rivet Cloud, a managed serverless platform. RivetKit is open source (Apache-2.0), self-hostable
  on Postgres, the file system, or FoundationDB, with client SDKs for JavaScript, React, Rust, Swift and SwiftUI, a CLI, an
  OpenAPI-described gateway/inspector HTTP API and an AsyncAPI WebSocket protocol. Rivet is backed by Y Combinator and a16z
  Speedrun.
url: https://raw.githubusercontent.com/api-evangelist/rivet/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
- lux-capital
x-tier: stub
x-tier-reason: portfolio-lead
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  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
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
image: https://rivet.dev/favicon.ico
tags:
- Company
- Infrastructure
- Actors
- Stateful Compute
- AI Agents
- Real-Time
- Serverless
- Edge
- WebSocket
- Durable Execution
- Developer Tools
tags_raw:
- Company
- Infrastructure
- Actors
- Stateful Compute
- AI Agents
- Realtime
- Serverless
- Edge
- WebSockets
- Durable Execution
- Developer Tools
apis:
- aid: rivet:rivet-actors-api
  name: Rivet Actors API
  description: The Actors API from Rivet — 3 operation(s) for actors.
  humanURL: https://www.rivet.dev/docs
  baseURL: https://api.rivet.dev
  tags:
  - Actors
  properties:
  - type: OpenAPI
    url: openapi/rivet-actors-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/rivet-rivetkit-asyncapi.json
  - type: Documentation
    url: https://www.rivet.dev/docs
  - type: Authentication
    url: authentication/rivet-authentication.yml
  - type: ErrorCatalog
    url: errors/rivet-problem-types.yml
  - type: Conventions
    url: conventions/rivet-conventions.yml
- aid: rivet:rivet-gateway-api
  name: Rivet Gateway API
  description: The Gateway API from Rivet — 12 operation(s) for gateway.
  humanURL: https://www.rivet.dev/docs
  baseURL: https://api.rivet.dev
  tags:
  - Gateways
  tags_raw:
  - Gateway
  properties:
  - type: OpenAPI
    url: openapi/rivet-gateway-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/rivet-rivetkit-asyncapi.json
  - type: Documentation
    url: https://www.rivet.dev/docs
  - type: Authentication
    url: authentication/rivet-authentication.yml
  - type: ErrorCatalog
    url: errors/rivet-problem-types.yml
  - type: Conventions
    url: conventions/rivet-conventions.yml
common:
- url: https://rivet.dev/blog/
  type: Blog
- url: https://rivet.dev/rss/feed.xml
  type: BlogRSS
- type: Website
  url: https://www.rivet.dev/
- type: Overlay
  url: overlays/rivet-rivetkit-overlay.yaml
- type: AgenticAccess
  url: agentic-access/rivet-agentic-access.yml
- type: DomainSecurity
  url: security/rivet-domain-security.yml
- type: DeveloperPortal
  url: https://www.rivet.dev/docs
- type: Documentation
  url: https://www.rivet.dev/docs
- type: APIReference
  url: https://www.rivet.dev/typedoc
- type: GettingStarted
  url: https://www.rivet.dev/docs/actors/quickstart
- type: GitHubOrganization
  url: https://github.com/rivet-dev
- type: Blog
  url: https://www.rivet.dev/blog
- type: ChangeLog
  url: https://www.rivet.dev/changelog
- type: StatusPage
  url: https://rivet.betteruptime.com/
- type: Pricing
  url: https://www.rivet.dev/cloud
- type: SignUp
  url: https://dashboard.rivet.dev
- type: Support
  url: https://www.rivet.dev/discord
- type: SDKs
  url: packages/rivet-packages.yml
- type: Packages
  url: packages/rivet-packages.yml
- type: CLI
  url: cli/rivet-cli.yml
- type: X-MCPServerCandidate
  url: mcp/rivet-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/rivet-llms.txt
- type: AsyncAPI
  url: asyncapi/rivet-rivetkit-asyncapi.json
- type: Lifecycle
  url: lifecycle/rivet-lifecycle.yml
- type: Conventions
  url: conventions/rivet-conventions.yml
- type: Authentication
  url: authentication/rivet-authentication.yml
- type: ErrorCatalog
  url: errors/rivet-problem-types.yml
- type: Conformance
  url: conformance/rivet-conformance.yml
- type: ChangeLog
  url: changelog/rivet-changelog.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 19
  pass: local-v1

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