Niural

Niural is a US-headquartered global workforce platform that unifies US payroll, PEO, employer of record (EOR), agent of record (AOR), contractor management and cross-border contractor payments in 150+ countries inside a single system, with an AI layer (EMMA) that orchestrates payroll, compliance and expense approvals. Its public developer surface — the Niural Public API, documented on ReadMe at docs.niural.com — is narrower than the product: an OpenAPI 3.0.3 contract of 15 operations across four resources (authentication, pay-on-demand contractor contracts, invoices and transactions), served from separate sandbox and live hosts, authenticated with a client-credential exchange that returns a bearer JWT, with cursor pagination, a 25 requests/second rate limit, and three HMAC-SHA256-signed webhook events. Payroll, PEO, EOR and benefits are not exposed on the public API.

Niural publishes 4 API contracts indexed on the APIs.io network, including Authentication API, Contracts API, Invoices API, and 1 more. Tagged areas include Company, Payroll, Human Resources, Employer of Record, and Contractor Management.

The Niural catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

Niural’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, pricing, signup flow, and 29 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

62.2/100 strong ▲ 5.0 Agent 32/100 agent ready Front door AI 4/6 moderate Heartbeat 30/100 slowing saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

1 published contract 3 Agent Skills

Company Payroll Human Resources Employer of Record Contractor Management Global Payments Invoicing Compliance Fintech

What this lets a business do 1

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

Human Capital Management

BC-300

Contracts

PATCH /contracts/{contract-id}/invite-contractor

Kin Score

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

Composite quality — 62.2/100 · strong

Contract Quality 10.3 / 19

Developer Ergonomics 9.9 / 15

Access Clarity 12.8 / 15

Operational Transparency 5.6 / 10

Contract Governance 1.6 / 9

Discoverability 5.5 / 8

Regulatory Posture 4.6 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 32/100 · agent ready

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 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 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 Employment & Payroll 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
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too

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 55.1 — up to +11.2 composite points
Contract Governance scores 18.2 — up to +9.8 composite points
Developer Ergonomics scores 66.1 — up to +6.8 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/niural/apis.yml: open an issue on github.com/api-evangelist/niural to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 4

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

Niural Authentication API

The Authentication API from Niural — 1 operation(s) for authentication.

Niural Contracts API

The Contracts API from Niural — 4 operation(s) for contracts.

Niural Invoices API

The Invoices API from Niural — 2 operation(s) for invoices.

Niural Transactions API

The Transactions API from Niural — 4 operation(s) for transactions.

Open Collections 4

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

Niural Public Authentication API

OPEN COLLECTION

Niural Public Contracts API

OPEN COLLECTION

Niural Public Invoices API

OPEN COLLECTION

Niural Public Transactions API

OPEN COLLECTION

Agent Skills 3

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

Invoice a contract and settle it with a transaction

AGENT SKILL

Onboard a contractor onto a pay-on-demand contract

AGENT SKILL

Reconcile webhook events against the REST API

AGENT SKILL

Niural API pricing

Prices published by Niural, read 2026-10-28 from www.niural.com/pricing.

Plan	Price
US Payroll Standard	$100/ month Platform Fee Includes: Complete multi-state payroll (W-2s, 1099s, compliance included); unlimited pay schedules and payroll
US Payroll Enterprise	Custom pricing based on volume Includes: Everything in Standard plan, plus advanced reporting and compliance alerts
PEO Basic (without benefits)	Starting at $59 per employee/month Includes: Multi-State Payroll, HR consulting, workers' comp insurance & EPLI
PEO Plus (with benefits)	Starting at $120 per employee/month Includes: Everything in PEO Basic plus benefits
International Contractor Management	$49 per contractor/month Includes: Contracts, payments in 150+ countries, tax forms
Contractor of Record (Niural Armor)	$299 per employee/month Includes: AOR services, misclassification liability protection
Employer Of Record (EOR)	Starting at $299 per employee/month Includes: Legal employer in 150+ countries, compliance, payroll, benefits
Global Payroll	Starting at $29 per employee/month Includes: Payroll processing in 150+ countries

Plan details, limits and sources →

Rate limits

Niural Public API requests: 25 requests per second

Rate-limit details →

Billed by: employee · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Niural Plans Pricing

8 plans

PLANS

Niural Price Estimates

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Niural Rate Limits

1 limits

RATE LIMITS

Service Levels 1

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

Niural

SLA

FinOps 1

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

Niural Finops

FINOPS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Niural Webhooks

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Niural API Rules

51 rules · 49 errors 1 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.

Niural Public Api Overlay

14 actions · documentation · niural-public-api-openapi.yml

DERIVED

Security Posture 4

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

Niural Authentication

http · 1 scheme

SECURITY

Niural Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Niural Vulnerability Disclosure

Hackerone · security.txt

SECURITY

Niural Trust Center

SOC 2 Type II

SECURITY

Agentic Access 1

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

Niural Agentic Access

15 operations · 7 acting

AGENTIC

Resources

Get Started 5

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Sandbox

Sandbox

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

OpenAPI

OpenAPI

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

X-MCPServerCandidate

X-MCPServerCandidate

AgenticAccess

AgenticAccess

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

DataModel

Conformance

Webhooks

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

Access & Security 5

Authentication, authorization, and security posture

Compliance

Compliance

TrustCenter

TrustCenter

Authentication

Authentication

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

Support

Support

ChangeLog

ChangeLog

RateLimits

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Pricing

TermsOfService

PrivacyPolicy

Plans

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: niural
name: Niural
description: 'Niural is a US-headquartered global workforce platform that unifies US payroll, PEO, employer of record (EOR),
  agent of record (AOR), contractor management and cross-border contractor payments in 150+ countries inside a single system,
  with an AI layer (EMMA) that orchestrates payroll, compliance and expense approvals. Its public developer surface — the
  Niural Public API, documented on ReadMe at docs.niural.com — is narrower than the product: an OpenAPI 3.0.3 contract of
  15 operations across four resources (authentication, pay-on-demand contractor contracts, invoices and transactions), served
  from separate sandbox and live hosts, authenticated with a client-credential exchange that returns a bearer JWT, with cursor
  pagination, a 25 requests/second rate limit, and three HMAC-SHA256-signed webhook events. Payroll, PEO, EOR and benefits
  are not exposed on the public API.'
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: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  - sandbox
  generated: '2026-11-06'
  method: derived
image: https://www.niural.com/favicon.ico
url: https://raw.githubusercontent.com/api-evangelist/niural/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
specificationVersion: '0.23'
created: '2026-08-04'
modified: '2026-08-04'
x-docs-platform: readme
x-docs-platform-confidence: high
x-docs-platform-checked: 2026-10-04
tags:
- Company
- Payroll
- Human Resources
- Employer of Record
- Contractor Management
- Global Payments
- Invoicing
- Compliance
- Fintech
apis:
- aid: niural:niural-authentication-api
  name: Niural Authentication API
  description: The Authentication API from Niural — 1 operation(s) for authentication.
  humanURL: https://docs.niural.com/
  baseURL: https://api-live.niural.com
  tags:
  - Authentication
  properties:
  - type: OpenAPI
    url: openapi/niural-authentication-api-openapi.yml
  - type: Documentation
    url: https://docs.niural.com/
  - type: APIReference
    url: https://docs.niural.com/reference/post_authenticate
  - type: GettingStarted
    url: https://docs.niural.com/docs/get-started
  - type: Authentication
    url: https://docs.niural.com/docs/authentications
  - type: Sandbox
    url: sandbox/niural-sandbox.yml
  - type: Webhooks
    url: asyncapi/niural-webhooks.yml
- aid: niural:niural-contracts-api
  name: Niural Contracts API
  description: The Contracts API from Niural — 4 operation(s) for contracts.
  humanURL: https://docs.niural.com/
  baseURL: https://api-live.niural.com
  tags:
  - Contracts
  properties:
  - type: OpenAPI
    url: openapi/niural-contracts-api-openapi.yml
  - type: Documentation
    url: https://docs.niural.com/
  - type: APIReference
    url: https://docs.niural.com/reference/post_authenticate
  - type: GettingStarted
    url: https://docs.niural.com/docs/get-started
  - type: Authentication
    url: https://docs.niural.com/docs/authentications
  - type: Sandbox
    url: sandbox/niural-sandbox.yml
  - type: Webhooks
    url: asyncapi/niural-webhooks.yml
- aid: niural:niural-invoices-api
  name: Niural Invoices API
  description: The Invoices API from Niural — 2 operation(s) for invoices.
  humanURL: https://docs.niural.com/
  baseURL: https://api-live.niural.com
  tags:
  - Invoices
  properties:
  - type: OpenAPI
    url: openapi/niural-invoices-api-openapi.yml
  - type: Documentation
    url: https://docs.niural.com/
  - type: APIReference
    url: https://docs.niural.com/reference/post_authenticate
  - type: GettingStarted
    url: https://docs.niural.com/docs/get-started
  - type: Authentication
    url: https://docs.niural.com/docs/authentications
  - type: Sandbox
    url: sandbox/niural-sandbox.yml
  - type: Webhooks
    url: asyncapi/niural-webhooks.yml
- aid: niural:niural-transactions-api
  name: Niural Transactions API
  description: The Transactions API from Niural — 4 operation(s) for transactions.
  humanURL: https://docs.niural.com/
  baseURL: https://api-live.niural.com
  tags:
  - Transaction
  tags_raw:
  - Transactions
  properties:
  - type: OpenAPI
    url: openapi/niural-transactions-api-openapi.yml
  - type: Documentation
    url: https://docs.niural.com/
  - type: APIReference
    url: https://docs.niural.com/reference/post_authenticate
  - type: GettingStarted
    url: https://docs.niural.com/docs/get-started
  - type: Authentication
    url: https://docs.niural.com/docs/authentications
  - type: Sandbox
    url: sandbox/niural-sandbox.yml
  - type: Webhooks
    url: asyncapi/niural-webhooks.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: CapabilityMap
  url: capabilities/niural-capability-edges.yml
  name: Niural Business Capability Map
- type: Website
  url: https://www.niural.com/
- type: DeveloperPortal
  url: https://docs.niural.com/
- type: Documentation
  url: https://docs.niural.com/
- type: APIReference
  url: https://docs.niural.com/reference/post_authenticate
- type: GettingStarted
  url: https://docs.niural.com/docs/get-started
- type: Support
  url: https://help.niural.com/
- type: Blog
  url: https://www.niural.com/blogs
- type: GitHubOrganization
  url: https://github.com/Niural
- type: Pricing
  url: https://www.niural.com/pricing
- type: SignUp
  url: https://app.niural.com/auth/employer/register
- type: Login
  url: https://app.niural.com/auth/login
- type: TermsOfService
  url: https://www.niural.com/legal/customer-terms-of-service
- type: PrivacyPolicy
  url: https://www.niural.com/legal/privacy-policy
- type: Compliance
  url: https://trust.niural.com/
- type: TrustCenter
  url: security/niural-trust-center.yml
- type: OpenAPI
  url: openapi/_original/niural-public-api-openapi.yml
- type: Overlay
  url: overlays/niural-public-api-overlay.yaml
- type: LLMsTxt
  url: llms/niural-llms.txt
- type: Authentication
  url: authentication/niural-authentication.yml
- type: Conventions
  url: conventions/niural-conventions.yml
- type: ErrorCatalog
  url: errors/niural-problem-types.yml
- type: Lifecycle
  url: lifecycle/niural-lifecycle.yml
- type: ChangeLog
  url: changelog/niural-changelog.yml
- type: DataModel
  url: data-model/niural-data-model.yml
- type: Conformance
  url: conformance/niural-conformance.yml
- type: RateLimits
  url: rate-limits/niural-rate-limits.yml
- type: Plans
  url: plans/niural-plans-pricing.yml
- type: Sandbox
  url: sandbox/niural-sandbox.yml
- type: Webhooks
  url: asyncapi/niural-webhooks.yml
- type: AgentSkill
  url: skills/_index.yml
- type: X-MCPServerCandidate
  url: mcp/niural-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: Packages
  url: packages/niural-packages.yml
- type: VulnerabilityDisclosure
  url: security/niural-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/niural-domain-security.yml
- type: AgenticAccess
  url: agentic-access/niural-agentic-access.yml
x-enrichment:
  date: '2026-08-04'
  status: enriched
  artifacts_added: 25
  pass: local-v1

Niural API — frequently asked questions

Does Niural have an API?

Yes. APIs.io lists 4 APIs from Niural, including Niural Authentication API, Niural Contracts API and Niural Invoices API, and 1 more.

Is there an OpenAPI specification for the Niural API?

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

How do I authenticate with the Niural API?

Niural uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Niural Authentication.

How much does the Niural API cost?

Niural publishes its prices; its US Payroll Standard plan is $100/ month Platform Fee as of 2026-10-28. APIs.io lists 8 pricing plans for Niural, with each plan's price, limits and inclusions under Pricing on this page.

Is the Niural API ready for AI agents?

Niural has a Kin Score of 62.2 out of 100 (strong) and an Agent Readiness score of 32.2 (agent-ready), scored by API Evangelist on 2026-11-06.

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