StackOne

StackOne is a Tool Gateway that connects AI agents to business applications, exposed through an MCP gateway, A2A agents and a Platform API, with agent authentication, tool discovery, tool policies, prompt-injection defense (StackOne Defender), an agent execution engine, observability and an AI integration builder. Its earlier Unified APIs (HRIS, ATS, CRM, LMS, IAM, Documents, Marketing, Ticketing, Messaging, Screening) are legacy: no longer in active development, with existing functionality still supported.

StackOne publishes 33 API contracts indexed on the APIs.io network, including Accounts API, Applications API, Campaigns API, and 30 more. Tagged areas include AI Agents, MCP, and AI Agent Infrastructure.

The StackOne catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

StackOne’s developer surface includes authentication, engineering blog, changelog, documentation, getting-started guide, pricing, and 37 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

47.8/100 developing ▬ flat Agent 49/100 agent ready Front door AI 6/6 dominant Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessPaid

1 published contract 2 MCP Servers 4 Features 9 Use Cases

AI Agents MCPAI Agent Infrastructure

What this lets a business do 3

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

Human Capital Management

BC-300

ApplicationsCandidatesEmployeesEmploymentsInterview StagesInterviews

GET /unified/ats/applications/{id} GET /unified/ats/applications/{id}/offers GET /unified/ats/applications GET /unified/ats/candidates

Marketing Management

BC-400

CampaignsTemplates

GET /unified/marketing/campaigns POST /unified/marketing/templates/email

Customer Relationship Management

BC-420

Contacts

POST /unified/crm/contacts

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 47.8/100 · developing

Contract Quality 9.8 / 19

Developer Ergonomics 8.2 / 15

Access Clarity 8.6 / 15

Operational Transparency 4.4 / 10

Contract Governance 0.9 / 9

Discoverability 4.4 / 8

Regulatory Posture 2.4 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 49/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 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 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 0 / 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/.

Show this score on your site.

It updates itself when the score changes. Paste this where you link to your API docs:

<a href="https://apis.io/providers/stackone/"><img src="https://apis.io/badge/stackone/card.svg" alt="StackOne on APIs.io — Kin Score by API Evangelist"></a>

Other styles, a README pill and a shields.io endpoint are on the badge page.

Raise your score.

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

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) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks Ask about this →
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too Ask about this →
Agent Skills +5 pts — skills artifact present, graded by who authored it Ask about this →

5 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 52.4 — up to +11.9 composite points Ask about this →
Contract Governance scores 9.8 — up to +10.8 composite points Ask about this →
Developer Ergonomics scores 54.8 — up to +9.0 composite points Ask about this →

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.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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/stackone/apis.yml: open an issue on github.com/api-evangelist/stackone 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Workflow Automation (iPaaS bridges)	undeclared	-	1	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 4

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.

Model Context Protocol (MCP)

measured — observed by APIs.io (verified)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

OpenAPI

measured — observed by APIs.io (published)

APIs 33

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

StackOne Unified HRIS API (Legacy)

Legacy (no longer in active development; existing functionality remains supported). StackOne Unified HRIS API provides a single, standardized interface to interact with multiple...

StackOne Unified ATS API (Legacy)

Legacy (no longer in active development; existing functionality remains supported). StackOne Unified ATS API standardizes recruitment workflows across applicant tracking system ...

StackOne Unified CRM API (Legacy)

Legacy (no longer in active development; existing functionality remains supported). StackOne Unified CRM API provides a standardized interface for managing customer contacts, ac...

StackOne Unified LMS API (Legacy)

Legacy (no longer in active development; existing functionality remains supported). StackOne Unified LMS API standardizes learning management across platforms, streamlining cour...

StackOne Unified IAM API (Legacy)

Legacy (no longer in active development; existing functionality remains supported). StackOne Unified IAM API provides a standardized interface for identity and access management...

StackOne Unified Documents API (Legacy)

Legacy (no longer in active development; existing functionality remains supported). StackOne Unified Documents API provides a standardized interface for file and knowledge manag...

StackOne Unified Marketing API (Legacy)

Legacy (no longer in active development; existing functionality remains supported). StackOne Unified Marketing API standardizes campaign management across platforms, streamlinin...

StackOne Unified Ticketing API (Legacy)

Legacy (no longer in active development; existing functionality remains supported). StackOne Unified Ticketing API standardizes support workflows across helpdesk platforms, with...

StackOne Unified Messaging API (Legacy)

Legacy (no longer in active development; existing functionality remains supported). StackOne Unified Messaging API standardizes communication workflows across platforms, with co...

StackOne Unified Screening API (Legacy)

Legacy (no longer in active development; existing functionality remains supported). StackOne Unified Screening API standardizes candidate verification across platforms, streamli...

StackOne Platform API

StackOne Platform API serves as the control plane for managing accounts, executing actions, controlling integrations, discovering connectors, monitoring and debugging via logs, ...

StackOne Accounts API

The Accounts API from StackOne — 5 operation(s) for accounts.

StackOne Applications API

The Applications API from StackOne — 4 operation(s) for applications.

StackOne Campaigns API

The Campaigns API from StackOne — 2 operation(s) for campaigns.

StackOne Candidates API

The Candidates API from StackOne — 4 operation(s) for candidates.

StackOne Companies API

The Companies API from StackOne — 2 operation(s) for companies.

StackOne Connect Sessions API

The Connect Sessions API from StackOne — 2 operation(s) for connect sessions.

StackOne Contacts API

The Contacts API from StackOne — 2 operation(s) for contacts.

StackOne Departments API

The Departments API from StackOne — 2 operation(s) for departments.

StackOne Employees API

The Employees API from StackOne — 4 operation(s) for employees.

StackOne Employments API

The Employments API from StackOne — 2 operation(s) for employments.

StackOne Interview Stages API

The Interview Stages API from StackOne — 2 operation(s) for interview stages.

StackOne Interviews API

The Interviews API from StackOne — 2 operation(s) for interviews.

StackOne Job Postings API

The Job Postings API from StackOne — 2 operation(s) for job postings.

StackOne Jobs API

The Jobs API from StackOne — 2 operation(s) for jobs.

StackOne Lists API

The Lists API from StackOne — 2 operation(s) for lists.

StackOne Locations API

The Locations API from StackOne — 4 operation(s) for locations.

StackOne Offers API

The Offers API from StackOne — 2 operation(s) for offers.

StackOne Proxy API

The Proxy API from StackOne — 1 operation(s) for proxy.

StackOne Rejected Reasons API

The Rejected Reasons API from StackOne — 2 operation(s) for rejected reasons.

StackOne Templates API

The Templates API from StackOne — 6 operation(s) for templates.

StackOne Time Off API

The Time Off API from StackOne — 2 operation(s) for time off.

StackOne Users API

The Users API from StackOne — 2 operation(s) for users.

Scroll for all 23

MCP Servers 2

Model Context Protocol servers that expose these APIs to AI agents.

StackOne MCP Server Quickstart

Endpoints https://api.stackone.com/mcp and https://mcp.stackone.com/mcp (both answer 401 without credentials, probed 2026-10-14).

MCP SERVER

StackOne MCP Server

Remote MCP server at mcp.stackone.com over HTTP.

MCP SERVER

StackOne API pricing

Prices published by StackOne, read 2026-10-28 from www.stackone.com/pricing/. A free plan or tier is listed.

Plan	Price
Gateway Starter	Free Includes: 1,000 credits / seat / month; 1 project; 1 day log retention
Gateway Team	$600/month Includes: 5,000 credits / seat / month; 3 custom connector slots; 3 projects; 7 days retention
Gateway Enterprise	Contact Us Includes: Custom credit volume; unlimited custom connector slots; 30 days retention
OEM Core	Free Includes: Unlimited end customers; 1 project; 7 days retention; monthly credit allowance
OEM Enterprise	Contact Us Includes: Volume discounts on credit commits; 10 projects; 90 days retention

Plan details, limits and sources →

Rate limits

Per-Connector Downstream Limit: see downstream provider rate limits varies
Starter Plan Action-Call Quota: 1000 actions per month
Core / Enterprise Action-Call Volume: per contract actions per month

Compiled by API Evangelist, not yet checked against StackOne's documentation. Rate-limit details →

Billed by: seat · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

StackOne Plans Pricing

5 plans

PLANS

StackOne Price Estimates

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

StackOne Rate Limits

3 limits

RATE LIMITS

Service Levels 1

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

StackOne

SLA

FinOps 1

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

StackOne Finops

FINOPS

Features 4

Notable capabilities this provider offers.

Unified APIs

Custom Unified Fields

Integration Hub

Authentication Links

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Stackone Context

11 classes · 5 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

StackOne — jsonschema rules

5 rules · 4 warn-severity 1 info-severity

SPECTRAL

StackOne API Rules

7 rules · 4 error-severity 3 warn-severity

SPECTRAL

2 properties

JSON SCHEMA

UsersPaginated

3 properties

JSON SCHEMA

Scroll for all 139

JSON Structure 2

JSON Structure definitions describing this provider's data shapes.

StackOne Employee Structure

0 properties

JSON STRUCTURE

StackOne Structure

0 properties

JSON STRUCTURE

Examples 1

Example request and response payloads for these APIs.

StackOne List Employees Example

4 fields

EXAMPLE

Security Posture 3

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

StackOne Authentication

http · 1 scheme

SECURITY

StackOne Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

StackOne Trust Center

SOC 2, ISO 27001

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

StackOne Agentic Access

78 operations · 23 acting

AGENTIC

Use Cases 9

What developers build with this provider.

AI Agents

People Tech

Recruitment

Learning

Assessment & Background Check

Global Employment

Benefits

Fintech

Security & Compliance

Scroll for all 9

Resources

Get Started 2

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

OpenAPI

OpenAPI

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

MCPServer

MCPGateway

LlmsText

Build 16

SDKs, sample code, and the tooling you integrate with

PostmanWorkspace

PostmanWorkspace

GitHubOrganization

SDKs

SDKTypeScript

SDKPython

SDKNode

SDKRuby

SDKJava

SDKPHP

SDKCSharp

SDKPackage

SDKPackage

SDKPackage

PostmanCollection

PostmanCollection

AIToolset

AIToolset

IntegrationHub

IntegrationHub

Scroll for all 16

Access & Security 3

Authentication, authorization, and security posture

TrustCenter

TrustCenter

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 3

Status, limits, changes, and where to get help

RateLimits

RateLimits

ChangeLog

ChangeLog

StatusPage

StatusPage

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Pricing

Pricing

Company 5

The organization behind the API

Website

Blog

About

Partners

LinkedIn

Other 5

Properties that don't map to a standard resource type

CapabilityMap

CaseStudies

Events

A2AProtocol

Source (apis.yml)

aid: stackone
url: https://raw.githubusercontent.com/api-evangelist/stackone/refs/heads/main/apis.yml
x-docs-platform: mintlify
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-17
x-docs-hosting: vercel
apis:
- aid: stackone:hris-api
  name: StackOne Unified HRIS API (Legacy)
  x-status: legacy
  x-status-evidence: The Legacy Unified APIs are no longer in active development. Existing functionality remains supported.
    (https://docs.stackone.com/legacy-unified-apis/introduction, fetched 2026-10-14)
  tags:
  - Employees
  - HRIS
  - Human Resources
  - Unified API
  - Legacy
  tags_raw:
  - Employees
  - HRIS
  - Human Resources
  - Unified API
  - Unified-API
  - Legacy
  humanURL: https://docs.stackone.com/legacy-unified-apis/introduction
  properties:
  - url: https://docs.stackone.com/legacy-unified-apis/introduction
    type: Documentation
  - url: https://docs.stackone.com/hris/api-reference/employees/list-employees
    type: APIReference
  description: Legacy (no longer in active development; existing functionality remains supported). StackOne Unified HRIS API
    provides a single, standardized interface to interact with multiple HR information system providers, normalizing data
    models for employee data, shifts, time-off, documents, and benefits across platforms.
- aid: stackone:ats-api
  name: StackOne Unified ATS API (Legacy)
  x-status: legacy
  x-status-evidence: The Legacy Unified APIs are no longer in active development. Existing functionality remains supported.
    (https://docs.stackone.com/legacy-unified-apis/introduction, fetched 2026-10-14)
  tags:
  - Applicant Tracking
  - Recruiting
  - Unified API
  - Legacy
  tags_raw:
  - Applicant Tracking
  - ATS
  - Recruitment
  - Unified API
  - Unified-API
  - Legacy
  humanURL: https://docs.stackone.com/legacy-unified-apis/introduction
  properties:
  - url: https://docs.stackone.com/legacy-unified-apis/introduction
    type: Documentation
  - url: https://docs.stackone.com/ats/api-reference/jobs/list-jobs
    type: APIReference
  description: Legacy (no longer in active development; existing functionality remains supported). StackOne Unified ATS API
    standardizes recruitment workflows across applicant tracking system providers, providing consistent data models for candidates,
    job postings, applications, and hiring pipeline management.
- aid: stackone:crm-api
  name: StackOne Unified CRM API (Legacy)
  x-status: legacy
  x-status-evidence: The Legacy Unified APIs are no longer in active development. Existing functionality remains supported.
    (https://docs.stackone.com/legacy-unified-apis/introduction, fetched 2026-10-14)
  tags:
  - Contacts
  - CRM
  - Unified API
  - Legacy
  tags_raw:
  - Contacts
  - CRM
  - Customer Relationship Management
  - Unified API
  - Unified-API
  - Legacy
  humanURL: https://docs.stackone.com/legacy-unified-apis/introduction
  properties:
  - url: https://docs.stackone.com/legacy-unified-apis/introduction
    type: Documentation
  - url: https://docs.stackone.com/crm/api-reference/contacts/creates-a-new-contact
    type: APIReference
  description: Legacy (no longer in active development; existing functionality remains supported). StackOne Unified CRM API
    provides a standardized interface for managing customer contacts, accounts, and opportunities across multiple CRM platforms,
    ensuring a consistent view of customer data.
- aid: stackone:lms-api
  name: StackOne Unified LMS API (Legacy)
  x-status: legacy
  x-status-evidence: The Legacy Unified APIs are no longer in active development. Existing functionality remains supported.
    (https://docs.stackone.com/legacy-unified-apis/introduction, fetched 2026-10-14)
  tags:
  - Courses
  - LMS
  - Unified API
  - Legacy
  tags_raw:
  - Courses
  - Learning Management
  - LMS
  - Unified API
  - Unified-API
  - Legacy
  humanURL: https://docs.stackone.com/legacy-unified-apis/introduction
  properties:
  - url: https://docs.stackone.com/legacy-unified-apis/introduction
    type: Documentation
  description: Legacy (no longer in active development; existing functionality remains supported). StackOne Unified LMS API
    standardizes learning management across platforms, streamlining course delivery, user progress tracking, content management,
    and assignments with consistent data models across LMS and learning content providers.
- aid: stackone:iam-api
  name: StackOne Unified IAM API (Legacy)
  x-status: legacy
  x-status-evidence: The Legacy Unified APIs are no longer in active development. Existing functionality remains supported.
    (https://docs.stackone.com/legacy-unified-apis/introduction, fetched 2026-10-14)
  tags:
  - Identity and Access Management
  - Identity
  - Unified API
  - Legacy
  tags_raw:
  - Access Management
  - IAM
  - Identity
  - Unified API
  - Unified-API
  - Legacy
  humanURL: https://docs.stackone.com/legacy-unified-apis/introduction
  properties:
  - url: https://docs.stackone.com/legacy-unified-apis/introduction
    type: Documentation
  description: Legacy (no longer in active development; existing functionality remains supported). StackOne Unified IAM API
    provides a standardized interface for identity and access management across providers, with comprehensive user management,
    role and permission mapping, group management, and resource access control.
- aid: stackone:documents-api
  name: StackOne Unified Documents API (Legacy)
  x-status: legacy
  x-status-evidence: The Legacy Unified APIs are no longer in active development. Existing functionality remains supported.
    (https://docs.stackone.com/legacy-unified-apis/introduction, fetched 2026-10-14)
  tags:
  - Documents
  - File
  - Knowledge Management
  - Unified API
  - Legacy
  tags_raw:
  - Documents
  - Files
  - Knowledge Management
  - Unified API
  - Knowledge-Management
  - Unified-API
  - Legacy
  humanURL: https://docs.stackone.com/legacy-unified-apis/introduction
  properties:
  - url: https://docs.stackone.com/legacy-unified-apis/introduction
    type: Documentation
  description: Legacy (no longer in active development; existing functionality remains supported). StackOne Unified Documents
    API provides a standardized interface for file and knowledge management across platforms like Google Drive, SharePoint,
    Dropbox, and Box, with consistent data models for drives, folders, and documents.
- aid: stackone:marketing-api
  name: StackOne Unified Marketing API (Legacy)
  x-status: legacy
  x-status-evidence: The Legacy Unified APIs are no longer in active development. Existing functionality remains supported.
    (https://docs.stackone.com/legacy-unified-apis/introduction, fetched 2026-10-14)
  tags:
  - Campaigns
  - Email
  - Marketing
  - SMS
  - Unified API
  - Legacy
  tags_raw:
  - Campaigns
  - Email
  - Marketing
  - SMS
  - Unified API
  - Unified-API
  - Legacy
  humanURL: https://docs.stackone.com/legacy-unified-apis/introduction
  properties:
  - url: https://docs.stackone.com/legacy-unified-apis/introduction
    type: Documentation
  description: Legacy (no longer in active development; existing functionality remains supported). StackOne Unified Marketing
    API standardizes campaign management across platforms, streamlining messages (SMS, Email, Push), campaigns, templates,
    and more with consistent endpoints across marketing automation providers.
- aid: stackone:ticketing-api
  name: StackOne Unified Ticketing API (Legacy)
  x-status: legacy
  x-status-evidence: The Legacy Unified APIs are no longer in active development. Existing functionality remains supported.
    (https://docs.stackone.com/legacy-unified-apis/introduction, fetched 2026-10-14)
  tags:
  - Help Desk
  - Support
  - Ticketing
  - Unified API
  - Legacy
  tags_raw:
  - Helpdesk
  - Support
  - Ticketing
  - Unified API
  - Unified-API
  - Legacy
  humanURL: https://docs.stackone.com/legacy-unified-apis/introduction
  properties:
  - url: https://docs.stackone.com/legacy-unified-apis/introduction
    type: Documentation
  description: Legacy (no longer in active development; existing functionality remains supported). StackOne Unified Ticketing
    API standardizes support workflows across helpdesk platforms, with consistent data models for ticket management, comments,
    and status tracking.
- aid: stackone:messaging-api
  name: StackOne Unified Messaging API (Legacy)
  x-status: legacy
  x-status-evidence: The Legacy Unified APIs are no longer in active development. Existing functionality remains supported.
    (https://docs.stackone.com/legacy-unified-apis/introduction, fetched 2026-10-14)
  tags:
  - Chat
  - Communications
  - Messaging
  - Unified API
  - Legacy
  tags_raw:
  - Chat
  - Communication
  - Messaging
  - Unified API
  - Unified-API
  - Legacy
  humanURL: https://docs.stackone.com/legacy-unified-apis/introduction
  properties:
  - url: https://docs.stackone.com/legacy-unified-apis/introduction
    type: Documentation
  description: Legacy (no longer in active development; existing functionality remains supported). StackOne Unified Messaging
    API standardizes communication workflows across platforms, with consistent data models for conversations, message delivery,
    and participant management.
- aid: stackone:screening-api
  name: StackOne Unified Screening API (Legacy)
  x-status: legacy
  x-status-evidence: The Legacy Unified APIs are no longer in active development. Existing functionality remains supported.
    (https://docs.stackone.com/legacy-unified-apis/introduction, fetched 2026-10-14)
  tags:
  - Assessment
  - Background Checks
  - Screening
  - Unified API
  - Legacy
  tags_raw:
  - Assessments
  - Background Checks
  - Screening
  - Unified API
  - Unified-API
  - Legacy
  humanURL: https://docs.stackone.com/legacy-unified-apis/introduction
  properties:
  - url: https://docs.stackone.com/legacy-unified-apis/introduction
    type: Documentation
  description: Legacy (no longer in active development; existing functionality remains supported). StackOne Unified Screening
    API standardizes candidate verification across platforms, streamlining background checks, assessments, and screening workflows
    with consistent data models.
- aid: stackone:platform-api
  name: StackOne Platform API
  tags:
  - Account
  - Actions
  - Administration
  - Platform
  tags_raw:
  - Accounts
  - Actions
  - Administration
  - Platform
  humanURL: https://docs.stackone.com/reference/getting-started-with-your-api
  properties:
  - url: https://docs.stackone.com/reference/getting-started-with-your-api
    type: Documentation
  description: StackOne Platform API serves as the control plane for managing accounts, executing actions, controlling integrations,
    discovering connectors, monitoring and debugging via logs, and proxy requests across StackOne projects and AI agents.
- aid: stackone:stackone-accounts-api
  name: StackOne Accounts API
  description: The Accounts API from StackOne — 5 operation(s) for accounts.
  humanURL: https://www.stackone.com/
  tags:
  - Account
  tags_raw:
  - Accounts
  properties:
  - type: OpenAPI
    url: openapi/stackone-accounts-api-openapi.yml
  - type: Documentation
    url: https://www.stackone.com/
- aid: stackone:stackone-applications-api
  name: StackOne Applications API
  description: The Applications API from StackOne — 4 operation(s) for applications.
  humanURL: https://www.stackone.com/
  tags:
  - Application
  tags_raw:
  - Applications
  properties:
  - type: OpenAPI
    url: openapi/stackone-applications-api-openapi.yml
  - type: Documentation
    url: https://www.stackone.com/
- aid: stackone:stackone-campaigns-api
  name: StackOne Campaigns API
  description: The Campaigns API from StackOne — 2 operation(s) for campaigns.
  humanURL: https://www.stackone.com/
  tags:
  - Campaigns
  properties:
  - type: OpenAPI
    url: openapi/stackone-campaigns-api-openapi.yml
  - type: Documentation
    url: https://www.stackone.com/
- aid: stackone:stackone-candidates-api
  name: StackOne Candidates API
  description: The Candidates API from StackOne — 4 operation(s) for candidates.
  humanURL: https://www.stackone.com/
  tags:
  - Candidates
  properties:
  - type: OpenAPI
    url: openapi/stackone-candidates-api-openapi.yml
  - type: Documentation
    url: https://www.stackone.com/
- aid: stackone:stackone-companies-api
  name: StackOne Companies API
  description: The Companies API from StackOne — 2 operation(s) for companies.
  humanURL: https://www.stackone.com/
  tags:
  - Companies
  properties:
  - type: OpenAPI
    url: openapi/stackone-companies-api-openapi.yml
  - type: Documentation
    url: https://www.stackone.com/
- aid: stackone:stackone-connect-sessions-api
  name: StackOne Connect Sessions API
  description: The Connect Sessions API from StackOne — 2 operation(s) for connect sessions.
  humanURL: https://www.stackone.com/
  tags:
  - Connect Sessions
  properties:
  - type: OpenAPI
    url: openapi/stackone-connect-sessions-api-openapi.yml
  - type: Documentation
    url: https://www.stackone.com/
- aid: stackone:stackone-contacts-api
  name: StackOne Contacts API
  description: The Contacts API from StackOne — 2 operation(s) for contacts.
  humanURL: https://www.stackone.com/
  tags:
  - Contacts
  properties:
  - type: OpenAPI
    url: openapi/stackone-contacts-api-openapi.yml
  - type: Documentation
    url: https://www.stackone.com/
- aid: stackone:stackone-departments-api
  name: StackOne Departments API
  description: The Departments API from StackOne — 2 operation(s) for departments.
  humanURL: https://www.stackone.com/
  tags:
  - Departments
  properties:
  - type: OpenAPI
    url: openapi/stackone-departments-api-openapi.yml
  - type: Documentation
    url: https://www.stackone.com/
- aid: stackone:stackone-employees-api
  name: StackOne Employees API
  description: The Employees API from StackOne — 4 operation(s) for employees.
  humanURL: https://www.stackone.com/
  tags:
  - Employees
  properties:
  - type: OpenAPI
    url: openapi/stackone-employees-api-openapi.yml
  - type: Documentation
    url: https://www.stackone.com/
- aid: stackone:stackone-employments-api
  name: StackOne Employments API
  description: The Employments API from StackOne — 2 operation(s) for employments.
  humanURL: https://www.stackone.com/
  tags:
  - Employments
  properties:
  - type: OpenAPI
    url: openapi/stackone-employments-api-openapi.yml
  - type: Documentation
    url: https://www.stackone.com/
- aid: stackone:stackone-interview-stages-api
  name: StackOne Interview Stages API
  description: The Interview Stages API from StackOne — 2 operation(s) for interview stages.
  humanURL: https://www.stackone.com/
  tags:
  - Interview Stages
  properties:
  - type: OpenAPI
    url: openapi/stackone-interview-stages-api-openapi.yml
  - type: Documentation
    url: https://www.stackone.com/
- aid: stackone:stackone-interviews-api
  name: StackOne Interviews API
  description: The Interviews API from StackOne — 2 operation(s) for interviews.
  humanURL: https://www.stackone.com/
  tags:
  - Interviews
  properties:
  - type: OpenAPI
    url: openapi/stackone-interviews-api-openapi.yml
  - type: Documentation
    url: https://www.stackone.com/
- aid: stackone:stackone-job-postings-api
  name: StackOne Job Postings API
  description: The Job Postings API from StackOne — 2 operation(s) for job postings.
  humanURL: https://www.stackone.com/
  tags:
  - Job Postings
  properties:
  - type: OpenAPI
    url: openapi/stackone-job-postings-api-openapi.yml
  - type: Documentation
    url: https://www.stackone.com/
- aid: stackone:stackone-jobs-api
  name: StackOne Jobs API
  description: The Jobs API from StackOne — 2 operation(s) for jobs.
  humanURL: https://www.stackone.com/
  tags:
  - Job
  tags_raw:
  - Jobs
  properties:
  - type: OpenAPI
    url: openapi/stackone-jobs-api-openapi.yml
  - type: Documentation
    url: https://www.stackone.com/
- aid: stackone:stackone-lists-api
  name: StackOne Lists API
  description: The Lists API from StackOne — 2 operation(s) for lists.
  humanURL: https://www.stackone.com/
  tags:
  - List
  tags_raw:
  - Lists
  properties:
  - type: OpenAPI
    url: openapi/stackone-lists-api-openapi.yml
  - type: Documentation
    url: https://www.stackone.com/
- aid: stackone:stackone-locations-api
  name: StackOne Locations API
  description: The Locations API from StackOne — 4 operation(s) for locations.
  humanURL: https://www.stackone.com/
  tags:
  - Location
  tags_raw:
  - Locations
  properties:
  - type: OpenAPI
    url: openapi/stackone-locations-api-openapi.yml
  - type: Documentation
    url: https://www.stackone.com/
- aid: stackone:stackone-offers-api
  name: StackOne Offers API
  description: The Offers API from StackOne — 2 operation(s) for offers.
  humanURL: https://www.stackone.com/
  tags:
  - Offers
  properties:
  - type: OpenAPI
    url: openapi/stackone-offers-api-openapi.yml
  - type: Documentation
    url: https://www.stackone.com/
- aid: stackone:stackone-proxy-api
  name: StackOne Proxy API
  description: The Proxy API from StackOne — 1 operation(s) for proxy.
  humanURL: https://www.stackone.com/
  tags:
  - Proxy
  properties:
  - type: OpenAPI
    url: openapi/stackone-proxy-api-openapi.yml
  - type: Documentation
    url: https://www.stackone.com/
- aid: stackone:stackone-rejected-reasons-api
  name: StackOne Rejected Reasons API
  description: The Rejected Reasons API from StackOne — 2 operation(s) for rejected reasons.
  humanURL: https://www.stackone.com/
  tags:
  - Rejected Reasons
  properties:
  - type: OpenAPI
    url: openapi/stackone-rejected-reasons-api-openapi.yml
  - type: Documentation
    url: https://www.stackone.com/
- aid: stackone:stackone-templates-api
  name: StackOne Templates API
  description: The Templates API from StackOne — 6 operation(s) for templates.
  humanURL: https://www.stackone.com/
  tags:
  - Templates
  properties:
  - type: OpenAPI
    url: openapi/stackone-templates-api-openapi.yml
  - type: Documentation
    url: https://www.stackone.com/
- aid: stackone:stackone-time-off-api
  name: StackOne Time Off API
  description: The Time Off API from StackOne — 2 operation(s) for time off.
  humanURL: https://www.stackone.com/
  tags:
  - Time Off
  properties:
  - type: OpenAPI
    url: openapi/stackone-time-off-api-openapi.yml
  - type: Documentation
    url: https://www.stackone.com/
- aid: stackone:stackone-users-api
  name: StackOne Users API
  description: The Users API from StackOne — 2 operation(s) for users.
  humanURL: https://www.stackone.com/
  tags:
  - User
  tags_raw:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/stackone-users-api-openapi.yml
  - type: Documentation
    url: https://www.stackone.com/
name: StackOne
tags:
- AI Agents
- MCP
- AI Agent Infrastructure
tags_raw:
- AI Agents
- MCP
- AI Agent Infrastructure
kind: contract
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: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/stackone.png
access: 3rd-Party
common:
- type: Plans
  url: plans/stackone-plans-pricing.yml
- type: RateLimits
  url: rate-limits/stackone-rate-limits.yml
- type: FinOps
  url: finops/stackone-finops.yml
- type: CapabilityMap
  url: capabilities/stackone-capability-edges.yml
  name: StackOne Business Capability Map
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/stackone/overview
- type: AgenticAccess
  url: agentic-access/stackone-agentic-access.yml
- type: TrustCenter
  url: security/stackone-trust-center.yml
- type: DomainSecurity
  url: security/stackone-domain-security.yml
- type: Authentication
  url: authentication/stackone-authentication.yml
- url: https://github.com/StackOneHQ
  name: GitHub Organization
  type: GitHubOrganization
- url: https://www.stackone.com/
  name: AI Agent Integration Infrastructure | StackOne
  type: Website
  description: 'null'
- url: https://www.stackone.com/case-studies
  name: Case Studies - Why Product Teams Build with Us | StackOne
  type: CaseStudies
  description: 'null'
- url: https://www.stackone.com/blog
  name: AI Agent Integration Blog | StackOne
  type: Blog
  description: 'null'
- url: https://www.stackone.com/changelog
  name: Changelog | StackOne
  type: ChangeLog
  description: 'null'
- url: https://www.stackone.com/events
  name: Events — Meet the StackOne Team | StackOne
  type: Events
  description: 'null'
- url: https://docs.stackone.com/guides/stackone-basics
  name: StackOne Basics - Stackone
  type: Documentation
  description: 'null'
- url: https://docs.stackone.com/agents/guides/getting-started
  name: Getting Started - Stackone
  type: GettingStarted
  description: 'null'
- url: https://www.stackone.com/company
  name: About Us | Integration Infrastructure for AI Agents | StackOne
  type: About
  description: 'null'
- url: https://www.stackone.com/pricing/
  name: Pricing & Plans
  type: Pricing
  description: 'null'
- url: https://status.stackone.com/
  name: StackOne Status
  type: StatusPage
  description: 'null'
- url: https://app.stackone.com/
  name: StackOne Dashboard
  type: Login
  description: 'null'
- url: https://www.stackone.com/partners
  name: Technology Partnerships for AI Agents | StackOne
  type: Partners
  description: 'null'
- url: https://www.stackone.com/connectors/
  name: 550+ AI agent Connectors & Integrations | StackOne
  type: Integrations
  description: 'null'
- url: https://www.linkedin.com/company/stackonehq/
  name: StackOne on LinkedIn
  type: LinkedIn
  description: 'null'
- url: https://x.com/StackOneHQ
  name: StackOne on X
  type: X
  description: 'null'
- url: https://docs.stackone.com/guides/stackone-api-sdks
  name: StackOne API SDKs
  type: SDKs
  description: 'null'
- url: https://github.com/StackOneHQ/stackone-client-typescript
  name: StackOne TypeScript SDK
  type: SDKTypeScript
  description: 'null'
- url: https://github.com/StackOneHQ/stackone-ai-python
  name: StackOne Python AI SDK
  type: SDKPython
  description: 'null'
- url: https://github.com/StackOneHQ/stackone-ai-node
  name: StackOne Node.js AI SDK
  type: SDKNode
  description: 'null'
- url: https://github.com/StackOneHQ/stackone-client-ruby
  name: StackOne Ruby SDK
  type: SDKRuby
  description: 'null'
- url: https://github.com/StackOneHQ/stackone-client-java
  name: StackOne Java SDK
  type: SDKJava
  description: 'null'
- url: https://github.com/stackoneHQ/stackone-client-php
  name: StackOne PHP SDK
  type: SDKPHP
  description: 'null'
- url: https://github.com/StackOneHQ/stackone-client-csharp
  name: StackOne C# SDK
  type: SDKCSharp
  description: 'null'
- url: https://www.npmjs.com/package/@stackone/stackone-client-ts
  name: StackOne TypeScript SDK on npm
  type: SDKPackage
  description: 'null'
- url: https://rubygems.org/gems/stackone_client
  name: StackOne Ruby SDK on RubyGems
  type: SDKPackage
  description: 'null'
- url: https://packagist.org/packages/stackone/client-sdk
  name: StackOne PHP SDK on Packagist
  type: SDKPackage
  description: 'null'
- url: https://github.com/StackOneHQ/stackone-client-postman
  name: StackOne Postman Collection
  type: PostmanCollection
  description: 'null'
- url: https://docs.stackone.com/mcp/quickstart
  name: StackOne MCP Server Quickstart
  type: MCPServer
  description: Endpoints https://api.stackone.com/mcp and https://mcp.stackone.com/mcp (both answer 401 without credentials,
    probed 2026-10-14).
- url: https://www.stackone.com/platform/mcp/
  name: 'Tool Gateway MCP: the enterprise MCP gateway | StackOne'
  type: MCPGateway
  description: 'null'
- url: https://docs.stackone.com/a2a/introduction
  name: StackOne A2A Protocol
  type: A2AProtocol
  description: 'null'
- url: https://docs.stackone.com/agents/typescript/introduction
  name: StackOne TypeScript Toolset for AI Agents
  type: AIToolset
  description: 'null'
- url: https://docs.stackone.com/agents/guides/openapi-tools
  name: StackOne OpenAPI Tools
  type: OpenAPI
  description: 'null'
- url: https://hub.stackone.com/about
  name: StackOne Integration Hub
  type: IntegrationHub
  description: 'null'
- url: https://docs.stackone.com/llms.txt
  name: StackOne llms.txt
  type: LlmsText
  description: 'null'
- name: Features
  type: Features
  url: https://www.stackone.com/platform/
  data:
  - name: MCP Gateway
  - name: Tool Discovery
  - name: Agent Auth
  - name: Policies
  - name: StackOne Defender (prompt-injection defense)
  - name: Agent Execution Engine
  - name: Observability
  - name: AI Integration Builder
  - name: Platform APIs
  - name: API Keys
  - name: Request Logs
  - name: Webhooks
  - name: Manage Integrations
  - name: Manage Projects
  - name: Manage Organizations
  - name: Liberaries
  - name: SDKs
  - name: Advanced Parameters
  - name: Pagination
  - name: StackOne Identifiers
  - name: Rate Limiting
  - name: OpenAPI Tools
  - name: Tool Filtering
  - name: Artificial Intelligence
  - name: RAG
  - name: SLA Guaranteed Integrations
  - name: Native Webhooks
  - name: Synthetic Webhooks
  - name: Authentication UI
  - name: Multi-Region
  - name: Hybrid Deployment
  - name: MCP Server
  - name: A2A Protocol
  - name: Actions API
  - name: Connector Builder
  - name: Proxy Requests
  - name: Sandbox Environments
- name: Legacy Features
  type: Features
  description: Legacy Unified APIs features; no longer in active development, existing functionality remains supported (https://docs.stackone.com/legacy-unified-apis/introduction).
  data:
  - name: Unified APIs
  - name: Custom Unified Fields
  - name: Integration Hub
  - name: Authentication Links
- name: Use Cases
  type: UseCases
  data:
  - name: AI Agents
  - name: People Tech
  - name: Recruitment
  - name: Learning
  - name: Assessment & Background Check
  - name: Global Employment
  - name: Benefits
  - name: Fintech
  - name: Security & Compliance
- name: Integrations
  type: Integrations
  data:
  - name: 15five
  - name: IAM
  - name: 1Password
  - name: 360 Learning
  - name: Learning
  - name: ADP Workforce Now
  - name: HRIS
  - name: Aircall
  - name: Airship
  - name: Marketing
  - name: Ansible
  - name: Anthropic
  - name: Articulate
  - name: Asana
  - name: Ticketing
  - name: Ashby
  - name: ATS
  - name: Attio
  - name: CRM
  - name: Autodesk
  - name: Avature
  - name: BambooHR
  - name: Bitwarden
  - name: Box
  - name: Braze
  - name: Breathe
  - name: Breezy
  - name: Bullhorn
  - name: Canva
  - name: Cezanne HR
  - name: CharlieHR
  - name: CheckMK
  - name: ClearCompany Learning (fka Brainier)
  - name: Cloudways
  - name: Confluence
  - name: Documents
  - name: Contentful
  - name: Cornerstone
  - name: Coursera
  - name: DATEV
  - name: Databricks
  - name: Deel
  - name: Dialpad
  - name: Dixa
  - name: Docebo
  - name: Domo
  - name: Dropbox
  - name: Dropbox Sign
  - name: Duo
  - name: EasyLlama
  - name: Egnyte
  - name: Elastic
  - name: Employment Hero
  - name: Envoy
  - name: Eploy
  - name: Factorial
  - name: Fivetran
  - name: Freshsales
  - name: Freshteam
  - name: GitHub
  - name: Go1
  - name: Gong
  - name: Google Drive
  - name: Google Workspace
  - name: Greenhouse
  - name: Gusto
  - name: HR Cloud
  - name: HaileyHR
  - name: Harvest
  - name: Hibob
  - name: Hubspot CRM
  - name: Humaans
  - name: IRIS Cascade HR
  - name: Intercom
  - name: Ironclad
  - name: Iterable
  - name: JazzHR
  - name: JetBrains
  - name: Jira
  - name: Kameleoon
  - name: Klaviyo
  - name: Lacework
  - name: LastPass
  - name: Lattice
  - name: Leapsome
  - name: Lever
  - name: LinkedIn Learning
  - name: LogicMelon
  - name: Make
  - name: Matillion
  - name: MeisterTask
  - name: Mercury
  - name: Microsoft Dynamics 365
  - name: Mixpanel
  - name: MoEngage
  - name: NetSuite
  - name: Netlify
  - name: Notion
  - name: Okta
  - name: OneDrive
  - name: OneLogin
  - name: Oneflow
  - name: OpenAI
  - name: OpenVPN
  - name: Oracle Fusion
  - name: Oracle HCM
  - name: Oyster
  - name: Payfit
  - name: Personio
  - name: Pinpoint
  - name: Pipedrive
  - name: Planday
  - name: Qlik
  - name: Recruitee
  - name: Recruiterflow
  - name: Remote
  - name: Render
  - name: Retool
  - name: RingCentral
  - name: Rollbar
  - name: SAP SuccessFactors
  - name: Sage HR
  - name: Salesforce
  - name: Salesforce Marketing Cloud
  - name: Salesloft
  - name: Scaleway
  - name: Scoro
  - name: SendGrid
  - name: SharePoint
  - name: Slack
  - name: Messaging
  - name: SmartRecruiters
  - name: Smartsheet
  - name: SonarCloud
  - name: Sophos
  - name: Spendesk
  - name: SpotDraft
  - name: Staffology HR
  - name: Tableau
  - name: TalentLMS
  - name: TeamTailor
  - name: TeamViewer
  - name: Teamwork
  - name: Terraform
  - name: Thrive
  - name: Toggl
  - name: Twilio
  - name: UKG Pro
  - name: UKG Ready
  - name: Udemy
  - name: Vincere
  - name: WebEx
  - name: Webflow
  - name: Workable
  - name: Workday
  - name: Workday RAAS
  - name: Zelt
  - name: Azure DevOps
  - name: Early Access
  - name: GitHub Issues
  - name: Gmail
  - name: Google Calendar
  - name: HubSpot Ticketing
  - name: Teams
  - name: Trello
  - name: Zendesk
  - name: AFAS Software
  - name: Coming Soon
  - name: Abacus
  - name: Absorb
  - name: Accelo
  - name: Act
  - name: ActiveCampaign
  - name: Adobe
  - name: Adobe Marketo Engage
  - name: Affinity
  - name: Agile CRM
  - name: Amazon Redshift
  - name: DB
  - name: Apollo
  - name: Attensi
  - name: Attentive
  - name: Avada
  - name: Beekeeper
  - name: Blackbaud CRM
  - name: Bloomreach
  - name: Brevo
  - name: BrightHR
  - name: CATS
  - name: Capsule
  - name: ChartHop
  - name: CircleCI
  - name: Cisco Meraki
  - name: CleverTap
  - name: ClickUp
  - name: Clockwork Recruiting
  - name: Close
  - name: Collage
  - name: Comeet
  - name: Copper
  - name: Darwinbox
  - name: Datadog
  - name: Dayforce
  - name: Dotdigital
  - name: Drip
  - name: Elasticsearch
  - name: Emarsys
  - name: Encharge
  - name: EngageATS
  - name: EngageBay
  - name: Foundry Intent
  - name: Fountain
  - name: Gem
  - name: GetResponse
  - name: HR Duo
  - name: HR Partner
  - name: Hireology
  - name: Homerun
  - name: HubSpot Marketing
  - name: Humanforce
  - name: IFS
  - name: Infobip
  - name: Insider
  - name: Insightly
  - name: Insperity
  - name: Invision Community
  - name: JobAdder
  - name: JobDiva
  - name: JobDone
  - name: JobScore
  - name: Jobsoid
  - name: Jobvite
  - name: JustGiving
  - name: Justworks
  - name: Kallidus
  - name: Keap
  - name: Keka
  - name: LMS365
  - name: Linear
  - name: Listrak
  - name: Lucca
  - name: MHR
  - name: Mailchimp
  - name: Microsoft Dynamics 365
  - name: Accounting
  - name: Monday.com
  - name: MongoDB
  - name: MySQL
  - name: Namely
  - name: NeonCRM
  - name: Nimble
  - name: Nmbrs
  - name: Nutshell
  - name: Officient
  - name: Omnisend
  - name: OneSignal
  - name: Optimizely
  - name: Oracle Taleo
  - name: Outlook
  - name: Paychex
  - name: Paycom
  - name: Paycor
  - name: Paylocity
  - name: PeopleHR
  - name: Pinecone
  - name: Pipeliner
  - name: Polymer
  - name: PostgreSQL
  - name: Productboard
  - name: Proliant
  - name: Quickbooks Online
  - name: Recruitive
  - name: Rippling
  - name: Rydoo
  - name: SD Worx
  - name: Sage Intacct
  - name: Sales Impact Academy
  - name: Salesflare
  - name: Screenloop
  - name: Seismic
  - name: Sendinblue
  - name: ServiceNow
  - name: Sesame
  - name: SharpSpring
  - name: Shopify
  - name: Simployer
  - name: Skilljar
  - name: Snowflake
  - name: Splunk
  - name: Square Payroll
  - name: Stripe
  - name: SugarCRM
  - name: Supermetrics
  - name: SurveyMonkey
  - name: TalentLyft
  - name: Teamleader
  - name: Thryv
  - name: Travis CI
  - name: TriNet
  - name: Vendasta
  - name: Vibes
  - name: Vtiger
  - name: WebEngage
  - name: WhatsApp
  - name: Xero
  - name: Zendesk Sell
  - name: Zenefits
  - name: Zoho CRM
  - name: Zoho People
  - name: edrone
  - name: iCIMS
  - name: turbopuffer
- type: Integrations
  url: https://www.stackone.com/connectors/
created: '2025-06-05'
modified: '2026-10-14'
position: Consuming
segments:


# --- truncated at 32 KB (34 KB total) ---
# Full source: https://artifacts.apis.io/stackone/apis.yml

StackOne API — frequently asked questions

Does StackOne have an API?

Yes. APIs.io lists 33 APIs from StackOne, including StackOne Unified HRIS API (Legacy), StackOne Unified ATS API (Legacy) and StackOne Unified CRM API (Legacy), and 30 more.

Is there an OpenAPI specification for the StackOne API?

Yes. APIs.io indexes 22 OpenAPI specifications for StackOne, each linked for download from this page.

How do I authenticate with the StackOne API?

StackOne documents its authentication (http · 1 scheme). The details are profiled on APIs.io as StackOne Authentication.

How much does the StackOne API cost?

StackOne publishes its prices; its Gateway Team plan is $600/month as of 2026-10-28. APIs.io lists 5 pricing plans for StackOne, with each plan's price, limits and inclusions under Pricing on this page.

Does StackOne have an MCP server?

Yes. APIs.io lists 2 MCP servers for StackOne: Endpoints https://api.stackone.com/mcp and https://mcp.stackone.com/mcp (both answer 401 without credentials, probed 2026-10-14).

Is the StackOne API ready for AI agents?

StackOne has a Kin Score of 47.8 out of 100 (developing) and an Agent Readiness score of 48.6 (agent-ready), scored by API Evangelist on 2026-11-13.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/stackone"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/stackone/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/stackone/evidence"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.