Canada Payroll Calculators

Canada Payroll Calculators provides free, browser‑based payroll deduction calculators built on CRA’s 2026 T4127 formulas and cross‑checked against PDOC. It offers tools for nanny pay, first‑employee cost, commission capitalization, and a free MCP payroll API endpoint for developers and AI agents, covering CPP, EI, QPP, QPIP and provincial income tax across all 13 provinces and territories. No signup required; all calculations run locally in the browser.

Canada Payroll Calculators is listed with 1 API on the APIs.io network. Tagged areas include Payroll, Canada, Tax, Calculators, and Open Source.

Canada Payroll Calculators’ developer surface includes API reference, getting-started guide, support, and 13 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

8.3/100 minimal Agent 4/100 human only Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessOpen

1 API 1 MCP Servers

Payroll Canada Tax Calculators Open Source

Kin Score

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

Composite quality — 8.3/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 2.0 / 17

Access Clarity 0.9 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 5.5 / 9

Regulatory Posture 1.2 / 15

Agent readiness — 4/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 4 / 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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% 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):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0

11 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points
Access Clarity scores 5.3 — up to +18.9 composite points
Developer Ergonomics scores 11.9 — up to +17.6 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/canada-payroll-ca/apis.yml: open an issue on github.com/api-evangelist/canada-payroll-ca 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.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

APIs 1

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

Payroll API

MCP payroll API providing calculations for CPP, EI, QPP, QPIP and provincial taxes.

MCP Servers 1

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

Canada Payroll Calculators MCP Server

Remote MCP server at canada-payroll.ca.

MCP SERVER

Security Posture 1

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

Canada Payroll Ca Domain Security

TLSv1.3

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

APIReference

APIReference

APIReference

APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

MCPServer

MCPServer

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support

Support

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: canada-payroll-ca
name: Canada Payroll Calculators
accessModel:
  pricing: unknown
  onboarding: open
  trial: false
  try_now: false
  public: true
  gated: none
  gated_source:
  - onboarding
  label: Open access
  confidence: low
  source:
  - security
  generated: '2026-11-06'
  method: derived
image: https://canada-payroll.ca/og.png
description: Canada Payroll Calculators provides free, browser‑based payroll deduction calculators built on CRA’s 2026 T4127
  formulas and cross‑checked against PDOC. It offers tools for nanny pay, first‑employee cost, commission capitalization,
  and a free MCP payroll API endpoint for developers and AI agents, covering CPP, EI, QPP, QPIP and provincial income tax
  across all 13 provinces and territories. No signup required; all calculations run locally in the browser.
url: https://artifacts.apis.io/canada-payroll-ca/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-04 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-04'
modified: '2026-11-04'
tags:
- Payroll
- Canada
- Tax
- Calculators
- Open Source
tags_raw:
- Payroll
- Canada
- Tax
- Calculators
- Open-Source
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: LLMsTxt
  url: llms/canada-payroll-ca-llms.txt
- type: MCPServer
  url: mcp/canada-payroll-ca-mcp.yml
- type: Hosts
  url: hosts/canada-payroll-ca-hosts.yml
- type: Vendors
  url: vendors/canada-payroll-ca-vendors.yml
- type: DomainSecurity
  url: security/canada-payroll-ca-domain-security.yml
- type: Website
  url: https://canada-payroll.ca/
- type: APIReference
  url: https://canada-payroll.ca/payroll-api/
- type: GettingStarted
  url: https://canada-payroll.ca/payroll-api/
- type: Support
  url: https://canada-payroll.ca/
- type: PrivacyPolicy
  url: https://...
- type: DomainSecurity
  url: security/canada-payroll-ca-domain-security.yml
- type: Website
  url: https://canada-payroll.ca/
- type: APIReference
  url: https://canada-payroll.ca/payroll-api/
- type: GettingStarted
  url: https://canada-payroll.ca/payroll-api/
- type: Support
  url: https://canada-payroll.ca/
- type: PrivacyPolicy
  url: https://canada-payroll.ca/privacy.html
apis:
- name: Payroll API
  description: MCP payroll API providing calculations for CPP, EI, QPP, QPIP and provincial taxes.
  humanURL: https://canada-payroll.ca/payroll-api/
  baseURL: https://canada-payroll.ca/mcp
  x-coverage:
    state: unreadable
    reason: no-machine-readable-spec
    detail: Provider offers an MCP JSON‑RPC endpoint but no OpenAPI/AsyncAPI/GraphQL spec is published.
    evidence:
    - url: https://canada-payroll.ca/mcp
      status: 200
    checked: '2026-11-04'
  aid: canada-payroll-ca:payroll-api
x-enrichment:
  date: '2026-11-04'
  status: enriched
  artifacts_added: 10
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Canada Payroll Calculators API — frequently asked questions

Does Canada Payroll Calculators have an API?

Yes. APIs.io lists 1 API from Canada Payroll Calculators, including Payroll API.

Does Canada Payroll Calculators have an MCP server?

Yes. APIs.io lists 1 MCP server for Canada Payroll Calculators: Remote MCP server at canada-payroll.ca.

Is the Canada Payroll Calculators API ready for AI agents?

Canada Payroll Calculators has a Kin Score of 8.3 out of 100 (minimal) and an Agent Readiness score of 3.7 (human-only), scored by API Evangelist on 2026-11-06.

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