Eventuate

Eventuate is a platform for developing transactional microservices using event sourcing and CQRS patterns, providing frameworks for managing distributed data consistency across services without two-phase commit.

Eventuate publishes 4 API contracts indexed on the APIs.io network, including Entities API, Events API, Subscriptions API, and 1 more. Tagged areas include CQRS, Distributed Data, Event Sourcing, Event-Driven, and Microservices.

The Eventuate catalog on APIs.io includes 1 Spectral governance ruleset.

Eventuate’s developer surface includes documentation, getting-started guide, GitHub presence, engineering blog, and 6 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

21.5/100 emerging ▬ flat Agent 17/100 agent aware Front door AI 1/6 silent Heartbeat 100/100 alive Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemium

1 published contract

CQRSDistributed DataEvent Sourcing Event-Driven MicroservicesSagas

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 21.5/100 · emerging

Contract Quality 7.9 / 19

Developer Ergonomics 1.8 / 15

Access Clarity 1.2 / 15

Operational Transparency 1.3 / 10

Contract Governance 1.2 / 9

Discoverability 4.3 / 8

Regulatory Posture 0.9 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 17/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

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 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 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

Pagination 0 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link

11 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 7.9 — up to +18.4 composite points
Developer Ergonomics scores 11.9 — up to +17.6 composite points
Contract Quality scores 42.1 — up to +14.5 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/eventuate/apis.yml: open an issue on github.com/api-evangelist/eventuate to ask a question or point us at an artifact you publish. 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.

OpenAPI

measured — observed by APIs.io (published)

APIs 4

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

Eventuate Entities API

The Entities API from Eventuate — 2 operation(s) for entities.

Eventuate Events API

The Events API from Eventuate — 1 operation(s) for events.

Eventuate Subscriptions API

The Subscriptions API from Eventuate — 4 operation(s) for subscriptions.

Eventuate System API

The System API from Eventuate — 1 operation(s) for system.

Open Collections 5

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

Eventuate REST API

OPEN COLLECTION

Eventuate REST Entities API

OPEN COLLECTION

Eventuate REST Entities Events API

OPEN COLLECTION

Eventuate REST Entities Subscriptions API

OPEN COLLECTION

Eventuate REST Entities System API

OPEN COLLECTION

Eventuate API pricing

Not yet checked against Eventuate's own pricing page. Compiled by API Evangelist on 2026-05-04; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free freemium	Free
Professional paid	Free
Enterprise enterprise	—

Plan details, limits and sources →

Rate limits

Free Tier Default: 10 requests per minute
Free Tier Monthly Quota: 1000 requests per month
Professional Tier Default: 100 requests per minute

Compiled by API Evangelist, not yet checked against Eventuate's documentation. All 5 limits →

Pricing Plans 1

Published pricing tiers and plan structures.

Eventuate Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Eventuate Rate Limits

5 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Eventuate

SLA

FinOps 1

Cost, billing, and metering signals for API financial operations.

Eventuate Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Eventuate API Rules

55 rules · 52 errors 1 warnings 2 info

SPECTRAL

Security Posture 1

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

Eventuate Domain Security

TLSv1.3

SECURITY

Agentic Access 1

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

Eventuate Agentic Access

10 operations · 5 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHub

GitHub

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: eventuate
name: Eventuate
description: Eventuate is a platform for developing transactional microservices using event sourcing and CQRS patterns, providing
  frameworks for managing distributed data consistency across services without two-phase commit.
type: Index
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/eventuate.png
tags:
- CQRS
- Distributed Data
- Event Sourcing
- Event-Driven
- Microservices
- Sagas
url: https://raw.githubusercontent.com/api-evangelist/eventuate/refs/heads/main/apis.yml
created: '2026-03-26'
modified: '2026-05-19'
specificationVersion: '0.23'
apis:
- aid: eventuate:eventuate-entities-api
  name: Eventuate Entities API
  description: The Entities API from Eventuate — 2 operation(s) for entities.
  humanURL: https://eventuate.io/
  tags:
  - Entities
  properties:
  - type: OpenAPI
    url: openapi/eventuate-entities-api-openapi.yml
- aid: eventuate:eventuate-events-api
  name: Eventuate Events API
  description: The Events API from Eventuate — 1 operation(s) for events.
  humanURL: https://eventuate.io/
  tags:
  - Event
  tags_raw:
  - Events
  properties:
  - type: OpenAPI
    url: openapi/eventuate-events-api-openapi.yml
- aid: eventuate:eventuate-subscriptions-api
  name: Eventuate Subscriptions API
  description: The Subscriptions API from Eventuate — 4 operation(s) for subscriptions.
  humanURL: https://eventuate.io/
  tags:
  - Subscription
  tags_raw:
  - Subscriptions
  properties:
  - type: OpenAPI
    url: openapi/eventuate-subscriptions-api-openapi.yml
- aid: eventuate:eventuate-system-api
  name: Eventuate System API
  description: The System API from Eventuate — 1 operation(s) for system.
  humanURL: https://eventuate.io/
  tags:
  - System
  properties:
  - type: OpenAPI
    url: openapi/eventuate-system-api-openapi.yml
common:
- type: Plans
  url: plans/eventuate-plans-pricing.yml
- type: RateLimits
  url: rate-limits/eventuate-rate-limits.yml
- type: FinOps
  url: finops/eventuate-finops.yml
- type: AgenticAccess
  url: agentic-access/eventuate-agentic-access.yml
- type: DomainSecurity
  url: security/eventuate-domain-security.yml
- type: Website
  url: https://eventuate.io/
- type: Documentation
  url: https://eventuate.io/docs/general/getting-started.html
- type: GettingStarted
  url: https://eventuate.io/exampleapps.html
- type: GitHub
  url: https://github.com/eventuate-tram
- type: Blog
  url: https://eventuate.io/news.html
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Eventuate API — frequently asked questions

Does Eventuate have an API?

Yes. APIs.io lists 4 APIs from Eventuate, including Eventuate Entities API, Eventuate Events API and Eventuate Subscriptions API, and 1 more.

Is there an OpenAPI specification for the Eventuate API?

Yes. APIs.io indexes 4 OpenAPI specifications for Eventuate, each linked for download from this page.

How much does the Eventuate API cost?

APIs.io lists 3 pricing plans for Eventuate, with each plan's price, limits and inclusions under Pricing on this page.

Is the Eventuate API ready for AI agents?

Eventuate has a Kin Score of 21.5 out of 100 (emerging) and an Agent Readiness score of 16.6 (agent-aware), scored by API Evangelist on 2026-11-06.

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