Union.ai website screenshot

Union.ai

Union.ai is the commercial AI/ML orchestration platform built on the open-source Flyte project. It exposes the Flyte/Union control plane (the FlyteAdmin service) for registering and running strongly-typed workflows, tasks, and launch plans, plus Union Serverless, Actors, and Artifacts. The control plane is primarily a gRPC API (FlyteIDL AdminService) with an auto-generated HTTP/JSON gateway exposed under /api/v1/, driven by the union / pyflyte CLI and Flytekit / Union SDKs.

Union.ai publishes 8 APIs on the APIs.io network, including Domains API, Executions API, Launch Plans API, and 5 more. Tagged areas include AI, ML, Orchestration, Workflows, and MLOps.

Union.ai’s developer surface includes authentication, documentation, and 11 more developer resources.

🌐 Visit website 📡 Source on GitHub
38.5/100 thin ▬ flat Agent 31/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessFreemiumSelf serveFree trial⚡ Free to try
9 APIs
AIMLOrchestrationWorkflowsMLOpsFlyteServerless

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 38.5/100 · thin
Contract Quality 12.9 / 25
Developer Ergonomics 3.9 / 20
Commercial Clarity 9.5 / 20
Operational Transparency 4.8 / 13
Governance 0.0 / 12
Discoverability 7.4 / 10
Agent readiness — 31/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 10 / 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
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/unionai: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 9

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

Union CLI & SDK

The union and pyflyte command-line tools plus the Flytekit and Union Python SDKs - the primary, fully-documented clients that register entities and drive the FlyteAdmin control ...

Union.ai Domains API

The Domains API from Union.ai — 1 operation(s) for domains.

Union.ai Executions API

The Executions API from Union.ai — 6 operation(s) for executions.

Union.ai Launch Plans API

The Launch Plans API from Union.ai — 5 operation(s) for launch plans.

Union.ai Node Executions API

The Node Executions API from Union.ai — 1 operation(s) for node executions.

Union.ai Projects API

The Projects API from Union.ai — 2 operation(s) for projects.

Union.ai Tasks API

The Tasks API from Union.ai — 4 operation(s) for tasks.

Union.ai Version API

The Version API from Union.ai — 1 operation(s) for version.

Union.ai Workflows API

The Workflows API from Union.ai — 4 operation(s) for workflows.

Scroll for all 9

Open Collections 1

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

Union FlyteAdmin Control Plane API (HTTP/JSON Gateway)

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Unionai Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Unionai Rate Limits

4 limits

RATE LIMITS

FinOps 1

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

Unionai Finops

FINOPS

Security Posture 3

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

Unionai Authentication

http/oauth2 · 2 schemes

SECURITY

Unionai Domain Security

TLSv1.3 · HSTS

SECURITY

Unionai Trust Center

SOC 2, HIPAA

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Unionai Scopes

1 scope · authorizationCode/clientCredentials

1 scopes

SCOPES

Agentic Access 1

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

Unionai Agentic Access

29 operations · 11 acting · 1 human-in-the-loop

29 operations · 11 acting

AGENTIC

Resources

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 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 GitHubOrganization
GitHubOrganization

Access & Security 4

Authentication, authorization, and security posture

TrustCenter
TrustCenter
 DomainSecurity
DomainSecurity
 Authentication
Authentication
 OAuthScopes
OAuthScopes

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

LinkedIn
LinkedIn
 Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: unionai
url: https://raw.githubusercontent.com/api-evangelist/unionai/refs/heads/main/apis.yml
name: Union.ai
kind: company
description: Union.ai is the commercial AI/ML orchestration platform built on the open-source Flyte project. It exposes the
  Flyte/Union control plane (the FlyteAdmin service) for registering and running strongly-typed workflows, tasks, and launch
  plans, plus Union Serverless, Actors, and Artifacts. The control plane is primarily a gRPC API (FlyteIDL AdminService) with
  an auto-generated HTTP/JSON gateway exposed under /api/v1/, driven by the union / pyflyte CLI and Flytekit / Union SDKs.
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: true
  try_now: true
  public: false
  label: Freemium (free trial) · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/unionai.png
tags:
- AI
- ML
- Orchestration
- Workflows
- MLOps
- Flyte
- Serverless
created: '2026-06-20'
modified: '2026-06-20'
specificationVersion: '0.19'
apis:
- aid: unionai:union-cli-sdk
  name: Union CLI & SDK
  tags:
  - CLI
  - SDK
  - Flytekit
  - pyflyte
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.union.ai/docs/flyte/api-reference/
  baseURL: https://<your-org>.app.union.ai/api/v1
  properties:
  - url: https://www.union.ai/docs/serverless/api-reference/union-sdk/
    type: Documentation
  - url: https://www.union.ai/docs/flyte/api-reference/pyflyte-cli/
    type: APIReference
  - url: https://www.union.ai/docs/byoc/api-reference/union-cli/
    type: APIReference
  - url: https://github.com/unionai
    type: GitHub
  description: The union and pyflyte command-line tools plus the Flytekit and Union Python SDKs - the primary, fully-documented
    clients that register entities and drive the FlyteAdmin control plane (including Actors and Artifacts) over gRPC.
- aid: unionai:unionai-domains-api
  name: Union.ai Domains API
  description: The Domains API from Union.ai — 1 operation(s) for domains.
  humanURL: https://www.union.ai/docs/flyte/api-reference/
  baseURL: https://<your-org>.app.union.ai/api/v1
  tags:
  - Domains
  properties:
  - type: OpenAPI
    url: openapi/unionai-domains-api-openapi.yml
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/projects-and-domains/
  - type: APIReference
    url: https://www.union.ai/docs/flyte/api-reference/
  - type: PostmanCollection
    url: collections/unionai.postman_collection.json
  - type: OpenCollection
    url: collections/unionai.opencollection.json
  - type: GitHub
    url: https://github.com/unionai
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/workflows/
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/tasks/
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/launch-plans/
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/development-cycle/remote-management/remote-examples/
  - type: Documentation
    url: https://www.union.ai/blog-post/introducing-union-serverless
  - type: APIReference
    url: https://www.union.ai/docs/serverless/api-reference/union-sdk/
- aid: unionai:unionai-executions-api
  name: Union.ai Executions API
  description: The Executions API from Union.ai — 6 operation(s) for executions.
  humanURL: https://www.union.ai/docs/flyte/api-reference/
  baseURL: https://<your-org>.app.union.ai/api/v1
  tags:
  - Executions
  properties:
  - type: OpenAPI
    url: openapi/unionai-executions-api-openapi.yml
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/projects-and-domains/
  - type: APIReference
    url: https://www.union.ai/docs/flyte/api-reference/
  - type: PostmanCollection
    url: collections/unionai.postman_collection.json
  - type: OpenCollection
    url: collections/unionai.opencollection.json
  - type: GitHub
    url: https://github.com/unionai
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/workflows/
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/tasks/
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/launch-plans/
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/development-cycle/remote-management/remote-examples/
  - type: Documentation
    url: https://www.union.ai/blog-post/introducing-union-serverless
  - type: APIReference
    url: https://www.union.ai/docs/serverless/api-reference/union-sdk/
- aid: unionai:unionai-launch-plans-api
  name: Union.ai Launch Plans API
  description: The Launch Plans API from Union.ai — 5 operation(s) for launch plans.
  humanURL: https://www.union.ai/docs/flyte/api-reference/
  baseURL: https://<your-org>.app.union.ai/api/v1
  tags:
  - Launch Plans
  properties:
  - type: OpenAPI
    url: openapi/unionai-launch-plans-api-openapi.yml
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/projects-and-domains/
  - type: APIReference
    url: https://www.union.ai/docs/flyte/api-reference/
  - type: PostmanCollection
    url: collections/unionai.postman_collection.json
  - type: OpenCollection
    url: collections/unionai.opencollection.json
  - type: GitHub
    url: https://github.com/unionai
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/workflows/
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/tasks/
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/launch-plans/
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/development-cycle/remote-management/remote-examples/
  - type: Documentation
    url: https://www.union.ai/blog-post/introducing-union-serverless
  - type: APIReference
    url: https://www.union.ai/docs/serverless/api-reference/union-sdk/
- aid: unionai:unionai-node-executions-api
  name: Union.ai Node Executions API
  description: The Node Executions API from Union.ai — 1 operation(s) for node executions.
  humanURL: https://www.union.ai/docs/flyte/api-reference/
  baseURL: https://<your-org>.app.union.ai/api/v1
  tags:
  - Node Executions
  properties:
  - type: OpenAPI
    url: openapi/unionai-node-executions-api-openapi.yml
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/projects-and-domains/
  - type: APIReference
    url: https://www.union.ai/docs/flyte/api-reference/
  - type: PostmanCollection
    url: collections/unionai.postman_collection.json
  - type: OpenCollection
    url: collections/unionai.opencollection.json
  - type: GitHub
    url: https://github.com/unionai
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/workflows/
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/tasks/
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/launch-plans/
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/development-cycle/remote-management/remote-examples/
  - type: Documentation
    url: https://www.union.ai/blog-post/introducing-union-serverless
  - type: APIReference
    url: https://www.union.ai/docs/serverless/api-reference/union-sdk/
- aid: unionai:unionai-projects-api
  name: Union.ai Projects API
  description: The Projects API from Union.ai — 2 operation(s) for projects.
  humanURL: https://www.union.ai/docs/flyte/api-reference/
  baseURL: https://<your-org>.app.union.ai/api/v1
  tags:
  - Projects
  properties:
  - type: OpenAPI
    url: openapi/unionai-projects-api-openapi.yml
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/projects-and-domains/
  - type: APIReference
    url: https://www.union.ai/docs/flyte/api-reference/
  - type: PostmanCollection
    url: collections/unionai.postman_collection.json
  - type: OpenCollection
    url: collections/unionai.opencollection.json
  - type: GitHub
    url: https://github.com/unionai
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/workflows/
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/tasks/
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/launch-plans/
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/development-cycle/remote-management/remote-examples/
  - type: Documentation
    url: https://www.union.ai/blog-post/introducing-union-serverless
  - type: APIReference
    url: https://www.union.ai/docs/serverless/api-reference/union-sdk/
- aid: unionai:unionai-tasks-api
  name: Union.ai Tasks API
  description: The Tasks API from Union.ai — 4 operation(s) for tasks.
  humanURL: https://www.union.ai/docs/flyte/api-reference/
  baseURL: https://<your-org>.app.union.ai/api/v1
  tags:
  - Tasks
  properties:
  - type: OpenAPI
    url: openapi/unionai-tasks-api-openapi.yml
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/projects-and-domains/
  - type: APIReference
    url: https://www.union.ai/docs/flyte/api-reference/
  - type: PostmanCollection
    url: collections/unionai.postman_collection.json
  - type: OpenCollection
    url: collections/unionai.opencollection.json
  - type: GitHub
    url: https://github.com/unionai
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/workflows/
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/tasks/
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/launch-plans/
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/development-cycle/remote-management/remote-examples/
  - type: Documentation
    url: https://www.union.ai/blog-post/introducing-union-serverless
  - type: APIReference
    url: https://www.union.ai/docs/serverless/api-reference/union-sdk/
- aid: unionai:unionai-version-api
  name: Union.ai Version API
  description: The Version API from Union.ai — 1 operation(s) for version.
  humanURL: https://www.union.ai/docs/flyte/api-reference/
  baseURL: https://<your-org>.app.union.ai/api/v1
  tags:
  - Version
  properties:
  - type: OpenAPI
    url: openapi/unionai-version-api-openapi.yml
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/projects-and-domains/
  - type: APIReference
    url: https://www.union.ai/docs/flyte/api-reference/
  - type: PostmanCollection
    url: collections/unionai.postman_collection.json
  - type: OpenCollection
    url: collections/unionai.opencollection.json
  - type: GitHub
    url: https://github.com/unionai
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/workflows/
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/tasks/
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/launch-plans/
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/development-cycle/remote-management/remote-examples/
  - type: Documentation
    url: https://www.union.ai/blog-post/introducing-union-serverless
  - type: APIReference
    url: https://www.union.ai/docs/serverless/api-reference/union-sdk/
- aid: unionai:unionai-workflows-api
  name: Union.ai Workflows API
  description: The Workflows API from Union.ai — 4 operation(s) for workflows.
  humanURL: https://www.union.ai/docs/flyte/api-reference/
  baseURL: https://<your-org>.app.union.ai/api/v1
  tags:
  - Workflows
  properties:
  - type: OpenAPI
    url: openapi/unionai-workflows-api-openapi.yml
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/projects-and-domains/
  - type: APIReference
    url: https://www.union.ai/docs/flyte/api-reference/
  - type: PostmanCollection
    url: collections/unionai.postman_collection.json
  - type: OpenCollection
    url: collections/unionai.opencollection.json
  - type: GitHub
    url: https://github.com/unionai
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/workflows/
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/tasks/
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/core-concepts/launch-plans/
  - type: Documentation
    url: https://www.union.ai/docs/flyte/user-guide/development-cycle/remote-management/remote-examples/
  - type: Documentation
    url: https://www.union.ai/blog-post/introducing-union-serverless
  - type: APIReference
    url: https://www.union.ai/docs/serverless/api-reference/union-sdk/
common:
- type: AgenticAccess
  url: agentic-access/unionai-agentic-access.yml
- type: TrustCenter
  url: security/unionai-trust-center.yml
- type: DomainSecurity
  url: security/unionai-domain-security.yml
- type: Authentication
  url: authentication/unionai-authentication.yml
- type: OAuthScopes
  url: scopes/unionai-scopes.yml
- type: GitHubOrganization
  url: https://github.com/unionai
- type: GitHubOrganization
  url: https://github.com/flyteorg
- type: LinkedIn
  url: https://www.linkedin.com/company/unionai
- type: Website
  url: https://www.union.ai
- type: Documentation
  url: https://www.union.ai/docs
- type: Plans
  url: plans/unionai-plans-pricing.yml
- type: RateLimits
  url: rate-limits/unionai-rate-limits.yml
- type: FinOps
  url: finops/unionai-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com