Stacks Ai

StackAI (Stack AI, Inc.) is an enterprise AI agent platform that lets teams build, deploy, and govern no-code agentic workflows at scale. Its visual Workflow Builder chains LLMs, knowledge bases, connections, and logic nodes into production agents that can be deployed as a REST API, chat assistant, form, or batch job. The public StackAI API runs deployed flows, manages Knowledge Bases and their file resources (upload, index, sync, cursor-paginated listing), and reads flow-run analytics. The platform targets regulated industries with SOC 2 Type II and ISO 27001 certifications, RBAC/SCIM governance, and multi-tenant, VPC, and on-premise deployment options. Backed by Lightspeed Venture Partners.

Stacks Ai publishes 5 API contracts indexed on the APIs.io network, including Analytics API, Knowledge Base Resources API, Knowledge Base Sync API, and 2 more. Tagged areas include Company, Artificial Intelligence, Agents, LLM, and No-Code.

The Stacks Ai catalog on APIs.io includes 1 Spectral governance ruleset.

Stacks Ai’s developer surface includes documentation, API reference, getting-started guide, pricing, signup flow, engineering blog, and 17 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

53.8/100 developing ▬ flat Agent 28/100 agent aware Front door AI 6/6 dominant Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract 3 Agent Skills

Company Artificial Intelligence Agents LLM No-Code Automation Workflows RAG Knowledge Base Enterprise

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

AI Model Services

AE-110

Knowledge Base ResourcesKnowledge Bases

POST /v1/knowledge-bases/{knowledge_base_id}/sync POST /v1/knowledge-bases POST /v1/knowledge-bases/{knowledge_base_id}/resources

Kin Score

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

Composite quality — 53.8/100 · developing

Contract Quality 9.2 / 19

Developer Ergonomics 8.1 / 15

Access Clarity 12.2 / 15

Operational Transparency 1.0 / 10

Contract Governance 2.9 / 9

Discoverability 5.5 / 8

Regulatory Posture 4.8 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 28/100 · 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

Pagination 5 / 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
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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

8 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 49.2 — up to +12.7 composite points
Operational Transparency scores 10.5 — up to +11.6 composite points
Developer Ergonomics scores 54.2 — up to +9.2 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/stacks-ai/apis.yml: open an issue on github.com/api-evangelist/stacks-ai 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 2

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)

OAuth 2.0

measured — observed by APIs.io (declared)

APIs 5

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

Stacks Ai Analytics API

The analytics API from Stacks Ai — 2 operation(s) for analytics.

Stacks Ai Knowledge Base Resources API

The Knowledge Base Resources API from Stacks Ai — 2 operation(s) for knowledge base resources.

Stacks Ai Knowledge Base Sync API

The Knowledge Base Sync API from Stacks Ai — 1 operation(s) for knowledge base sync.

Stacks Ai Knowledge Bases API

The Knowledge Bases API from Stacks Ai — 5 operation(s) for knowledge bases.

Stacks Ai Run Flow API

The Run Flow API from Stacks Ai — 1 operation(s) for run flow.

Open Collections 5

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

StackAI analytics API

OPEN COLLECTION

StackAI analytics Knowledge Base Resources API

OPEN COLLECTION

StackAI analytics Knowledge Base Sync API

OPEN COLLECTION

StackAI analytics Knowledge Bases API

OPEN COLLECTION

StackAI analytics Run Flow API

OPEN COLLECTION

Agent Skills 3

Packaged agent skills for driving this provider's APIs from an AI assistant.

Build and populate a StackAI knowledge base

AGENT SKILL

Monitor StackAI flow-run analytics

AGENT SKILL

Run a deployed StackAI flow

AGENT SKILL

Stacks Ai API pricing

Prices published by Stacks Ai, read 2026-10-07 from www.stackai.com/pricing.

Plan	Price
Free plan	$0 Includes: 500 runs per month*, 2 Projects, 1 Seat, Community support on Discord
Enterprise	Custom Includes: Custom number of runs*, Unlimited projects, Custom number of seats, all features, on-prem/VPC deploy

Plan details, limits and sources →

Billed by: subscription · FinOps profile →

Pricing Plans 1

Published pricing tiers and plan structures.

Stacks Ai Plans Pricing

2 plans

PLANS

Service Levels 1

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

Stacks Ai

SLA

FinOps 1

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

Stacks Ai Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Stacks Ai API Rules

63 rules · 56 errors 6 warnings 1 info

SPECTRAL

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.

Stacks Ai Openapi Overlay

2 actions · update · stacks-ai-openapi-original.yml

DERIVED

Security Posture 3

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

Stacks Ai Authentication

http/oauth2 · 2 schemes

SECURITY

Stacks Ai Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Stacks Ai Trust Center

SOC 2, ISO 27001

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Stacks Ai Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Agentic Access 1

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

Stacks Ai Agentic Access

13 operations · 7 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

AgentSkill

X-MCPServerCandidate

AgenticAccess

WellKnown

LLMsTxt

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

TrustCenter

TrustCenter

DomainSecurity

DomainSecurity

Compliance

Compliance

Operate 1

Status, limits, changes, and where to get help

StatusPage

StatusPage

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Overlay

Overlay

Source (apis.yml)

aid: stacks-ai
name: Stacks Ai
description: StackAI (Stack AI, Inc.) is an enterprise AI agent platform that lets teams build, deploy, and govern no-code
  agentic workflows at scale. Its visual Workflow Builder chains LLMs, knowledge bases, connections, and logic nodes into
  production agents that can be deployed as a REST API, chat assistant, form, or batch job. The public StackAI API runs deployed
  flows, manages Knowledge Bases and their file resources (upload, index, sync, cursor-paginated listing), and reads flow-run
  analytics. The platform targets regulated industries with SOC 2 Type II and ISO 27001 certifications, RBAC/SCIM governance,
  and multi-tenant, VPC, and on-premise deployment options. Backed by Lightspeed Venture Partners.
url: https://raw.githubusercontent.com/api-evangelist/stacks-ai/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- lightspeed-venture-partners
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: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://www.stackai.com/favicon.ico
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
x-docs-platform: gitbook
x-docs-platform-confidence: high
x-docs-platform-checked: 2026-10-17
tags:
- Company
- Artificial Intelligence
- Agents
- LLM
- No-Code
- Automation
- Workflows
- RAG
- Knowledge Base
- Enterprise
tags_raw:
- Company
- AI
- Agents
- Artificial Intelligence
- LLM
- No-Code
- Automation
- Workflows
- RAG
- Knowledge Base
- Enterprise
apis:
- aid: stacks-ai:stacks-ai-analytics-api
  name: Stacks Ai Analytics API
  description: The analytics API from Stacks Ai — 2 operation(s) for analytics.
  humanURL: https://docs.stackai.com/interface-and-deployment/api-reference
  baseURL: https://api.stack-ai.com
  tags:
  - Analytics
  tags_raw:
  - analytics
  properties:
  - type: OpenAPI
    url: openapi/stacks-ai-analytics-api-openapi.yml
  - type: Authentication
    url: authentication/stacks-ai-authentication.yml
  - type: OAuthScopes
    url: scopes/stacks-ai-scopes.yml
  - type: ErrorCatalog
    url: errors/stacks-ai-problem-types.yml
  - type: Conventions
    url: conventions/stacks-ai-conventions.yml
  - type: DataModel
    url: data-model/stacks-ai-data-model.yml
  - type: Conformance
    url: conformance/stacks-ai-conformance.yml
  - type: Lifecycle
    url: lifecycle/stacks-ai-lifecycle.yml
- aid: stacks-ai:stacks-ai-knowledge-base-resources-api
  name: Stacks Ai Knowledge Base Resources API
  description: The Knowledge Base Resources API from Stacks Ai — 2 operation(s) for knowledge base resources.
  humanURL: https://docs.stackai.com/interface-and-deployment/api-reference
  baseURL: https://api.stack-ai.com
  tags:
  - Knowledge Base Resources
  properties:
  - type: OpenAPI
    url: openapi/stacks-ai-knowledge-base-resources-api-openapi.yml
  - type: Authentication
    url: authentication/stacks-ai-authentication.yml
  - type: OAuthScopes
    url: scopes/stacks-ai-scopes.yml
  - type: ErrorCatalog
    url: errors/stacks-ai-problem-types.yml
  - type: Conventions
    url: conventions/stacks-ai-conventions.yml
  - type: DataModel
    url: data-model/stacks-ai-data-model.yml
  - type: Conformance
    url: conformance/stacks-ai-conformance.yml
  - type: Lifecycle
    url: lifecycle/stacks-ai-lifecycle.yml
- aid: stacks-ai:stacks-ai-knowledge-base-sync-api
  name: Stacks Ai Knowledge Base Sync API
  description: The Knowledge Base Sync API from Stacks Ai — 1 operation(s) for knowledge base sync.
  humanURL: https://docs.stackai.com/interface-and-deployment/api-reference
  baseURL: https://api.stack-ai.com
  tags:
  - Knowledge Base Sync
  properties:
  - type: OpenAPI
    url: openapi/stacks-ai-knowledge-base-sync-api-openapi.yml
  - type: Authentication
    url: authentication/stacks-ai-authentication.yml
  - type: OAuthScopes
    url: scopes/stacks-ai-scopes.yml
  - type: ErrorCatalog
    url: errors/stacks-ai-problem-types.yml
  - type: Conventions
    url: conventions/stacks-ai-conventions.yml
  - type: DataModel
    url: data-model/stacks-ai-data-model.yml
  - type: Conformance
    url: conformance/stacks-ai-conformance.yml
  - type: Lifecycle
    url: lifecycle/stacks-ai-lifecycle.yml
- aid: stacks-ai:stacks-ai-knowledge-bases-api
  name: Stacks Ai Knowledge Bases API
  description: The Knowledge Bases API from Stacks Ai — 5 operation(s) for knowledge bases.
  humanURL: https://docs.stackai.com/interface-and-deployment/api-reference
  baseURL: https://api.stack-ai.com
  tags:
  - Knowledge Bases
  properties:
  - type: OpenAPI
    url: openapi/stacks-ai-knowledge-bases-api-openapi.yml
  - type: Authentication
    url: authentication/stacks-ai-authentication.yml
  - type: OAuthScopes
    url: scopes/stacks-ai-scopes.yml
  - type: ErrorCatalog
    url: errors/stacks-ai-problem-types.yml
  - type: Conventions
    url: conventions/stacks-ai-conventions.yml
  - type: DataModel
    url: data-model/stacks-ai-data-model.yml
  - type: Conformance
    url: conformance/stacks-ai-conformance.yml
  - type: Lifecycle
    url: lifecycle/stacks-ai-lifecycle.yml
- aid: stacks-ai:stacks-ai-run-flow-api
  name: Stacks Ai Run Flow API
  description: The Run Flow API from Stacks Ai — 1 operation(s) for run flow.
  humanURL: https://docs.stackai.com/interface-and-deployment/api-reference
  baseURL: https://api.stack-ai.com
  tags:
  - Run Flow
  properties:
  - type: OpenAPI
    url: openapi/stacks-ai-run-flow-api-openapi.yml
  - type: Authentication
    url: authentication/stacks-ai-authentication.yml
  - type: OAuthScopes
    url: scopes/stacks-ai-scopes.yml
  - type: ErrorCatalog
    url: errors/stacks-ai-problem-types.yml
  - type: Conventions
    url: conventions/stacks-ai-conventions.yml
  - type: DataModel
    url: data-model/stacks-ai-data-model.yml
  - type: Conformance
    url: conformance/stacks-ai-conformance.yml
  - type: Lifecycle
    url: lifecycle/stacks-ai-lifecycle.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: CapabilityMap
  url: capabilities/stacks-ai-capability-edges.yml
  name: Stacks Ai Business Capability Map
- type: Plans
  url: plans/stacks-ai-plans-pricing.yml
- type: Website
  url: https://www.stackai.com/
- type: AgentSkill
  url: skills/stacks-ai-build-knowledge-base.md
- type: X-MCPServerCandidate
  url: mcp/stacks-ai-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: Overlay
  url: overlays/stacks-ai-openapi-overlay.yaml
- type: TrustCenter
  url: security/stacks-ai-trust-center.yml
- type: DomainSecurity
  url: security/stacks-ai-domain-security.yml
- type: AgenticAccess
  url: agentic-access/stacks-ai-agentic-access.yml
- type: DeveloperPortal
  url: https://docs.stackai.com/
- type: Documentation
  url: https://docs.stackai.com/
- type: APIReference
  url: https://docs.stackai.com/interface-and-deployment/api-reference
- type: GettingStarted
  url: https://docs.stackai.com/getting-started/start-here
- type: Pricing
  url: https://www.stackai.com/pricing
- type: SignUp
  url: https://www.stackai.com/auth/login
- type: TermsOfService
  url: https://www.stackai.com/terms-of-service
- type: PrivacyPolicy
  url: https://www.stackai.com/privacy
- type: Blog
  url: https://www.stackai.com/blog
- type: GitHubOrganization
  url: https://github.com/stackai
- type: StatusPage
  url: https://status.stack-ai.com/
- type: Compliance
  url: https://trust.stackai.com/
- type: WellKnown
  url: well-known/stacks-ai-well-known.yml
- type: LLMsTxt
  url: llms/stacks-ai-llms.txt
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 16
  pass: local-v1

Stacks Ai API — frequently asked questions

Does Stacks Ai have an API?

Yes. APIs.io lists 5 APIs from Stacks Ai, including Stacks Ai Analytics API, Stacks Ai Knowledge Base Resources API and Stacks Ai Knowledge Base Sync API, and 2 more.

Is there an OpenAPI specification for the Stacks Ai API?

Yes. APIs.io indexes 5 OpenAPI specifications for Stacks Ai, each linked for download from this page.

How do I authenticate with the Stacks Ai API?

Stacks Ai uses bearer-token authentication (http/oauth2 · 2 schemes). The details are profiled on APIs.io as Stacks Ai Authentication.

How much does the Stacks Ai API cost?

Stacks Ai publishes its prices; its Free plan plan is $0 as of 2026-10-07. APIs.io lists 2 pricing plans for Stacks Ai, with each plan's price, limits and inclusions under Pricing on this page.

Is the Stacks Ai API ready for AI agents?

Stacks Ai has a Kin Score of 53.8 out of 100 (developing) and an Agent Readiness score of 28.1 (agent-aware), scored by API Evangelist on 2026-11-06.

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