Planomy Tax Data

A free, keyless open-data JSON API publishing the 2026 US retirement and tax figures that drive the Planomy local-first personal-finance planner: federal income-tax brackets and the standard deduction, FICA rates and the Social Security wage base, the COLA and retirement earnings test, Medicare Part A/B/D premiums and deductibles with the full IRMAA tier tables, contribution limits for employer plans, IRA, SIMPLE, HSA, HDHP and health FSA, Roth and traditional-IRA phase-outs, Saver's Credit thresholds, RMD applicable ages, and a set of state income-tax presets. Two static JSON endpoints — a year manifest and one document per tax year — served from a Cloudflare CDN with no key, no sign-up and no quota. Its distinguishing feature is provenance: every section carries a source key that resolves to a named IRS, SSA, CMS or Federal Register document with the date it was last verified, so any single figure can be cited back to the government publication it came from.

Planomy Tax Data publishes 1 API on the APIs.io network: Tax Data API. Tagged areas include Tax, Finance, Open Data, Retirement, and Government.

Planomy Tax Data’s developer surface includes support, pricing, signup flow, authentication, and 16 more developer resources.

🌐 Visit website 📡 Source on GitHub

40.5/100 developing ▬ flat Agent 30/100 agent ready saas Full breakdown ↓
scored 2026-09-04 · rubric v0.18.3

AccessFreemiumOpen⚡ Free to try

1 APIs

Tax Finance Open Data Retirement Government Personal Finance IRS Social Security Medicare JSON

Kin Score

Kin Score How this is scored →
scored 2026-09-04 · rubric v0.18.3

Composite quality — 40.5/100 · developing

Contract Quality 5.1 / 21

Developer Ergonomics 6.0 / 17

Access Clarity 13.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.8 / 10

Discoverability 6.5 / 9

Regulatory Posture 6.9 / 15

Agent readiness — 30/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 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 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Government & Public Sector 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.

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/.

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 github.com/api-evangelist/planomy-tax-data: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 1

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

JSON Schema 2

Standalone JSON Schema definitions for this provider's data models.

Planomy Tax Data Index

6 properties

JSON SCHEMA

Planomy Tax Year Dataset

16 properties

JSON SCHEMA

Examples 2

Example request and response payloads for these APIs.

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

SignUp

SignUp

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

X-MCPServerCandidate

X-MCPServerCandidate

AgentSkill

AgentSkill

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

DataModel

Vocabulary

Components

Scroll for all 7

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 4

Pricing, plans, and the legal terms of use

Pricing

TermsOfService

PrivacyPolicy

Plans

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

name: Planomy Tax Data
description: 'A free, keyless open-data JSON API publishing the 2026 US retirement and tax figures that drive the Planomy
  local-first personal-finance planner: federal income-tax brackets and the standard deduction, FICA rates and the Social
  Security wage base, the COLA and retirement earnings test, Medicare Part A/B/D premiums and deductibles with the full IRMAA
  tier tables, contribution limits for employer plans, IRA, SIMPLE, HSA, HDHP and health FSA, Roth and traditional-IRA phase-outs,
  Saver''s Credit thresholds, RMD applicable ages, and a set of state income-tax presets. Two static JSON endpoints — a year
  manifest and one document per tax year — served from a Cloudflare CDN with no key, no sign-up and no quota. Its distinguishing
  feature is provenance: every section carries a source key that resolves to a named IRS, SSA, CMS or Federal Register document
  with the date it was last verified, so any single figure can be cited back to the government publication it came from.'
url: https://raw.githubusercontent.com/api-evangelist/planomy-tax-data/refs/heads/main/apis.yml
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: open
  trial: false
  try_now: true
  public: true
  label: Freemium · Open access
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-02'
  method: derived
image: https://planomy.net/og/og-home.png
created: '2026-07-28'
modified: '2026-08-09'
specificationVersion: '0.23'
tags:
- Tax
- Finance
- Open Data
- Retirement
- Government
- Personal Finance
- IRS
- Social Security
- Medicare
- JSON
tags_raw:
- tax
- finance
- open-data
- retirement
- government
- personal-finance
- irs
- social-security
- medicare
- json
apis:
- aid: planomy-tax-data:planomy-tax-data-tax-data-api
  name: Planomy Tax Data Tax Data API
  description: Dated, source-attributed US tax and retirement figures.
  humanURL: https://planomy.net/data/
  baseURL: https://planomy.net
  tags:
  - Tax Data
  tags_raw:
  - tax-data
  properties:
  - type: OpenAPI
    url: openapi/planomy-tax-data-tax-data-api-openapi.yml
  - type: Documentation
    url: https://planomy.net/data/
  - type: APIReference
    url: https://planomy.net/data/#schema
  - type: LLMsTxt
    url: https://planomy.net/llms.txt
  - type: JSONSchema
    url: json-schema/planomy-tax-data-tax-year-dataset.json
  - type: JSONSchema
    url: json-schema/planomy-tax-data-index.json
  - type: Examples
    url: examples/planomy-tax-data-2026.json
  - type: Examples
    url: examples/planomy-tax-data-index.json
maintainers:
- FN: Planomy
  email: support@planomy.net
  url: https://planomy.net/data/
generated:
  by: apis.io/add
  model: claude-opus-4-8
  confidence: 90
  at: '2026-07-28T15:14:23.864Z'
common:
- type: Overlay
  url: overlays/planomy-tax-data-overlay.yaml
- type: AgenticAccess
  url: agentic-access/planomy-tax-data-agentic-access.yml
- type: DomainSecurity
  url: security/planomy-tax-data-domain-security.yml
- type: Website
  url: https://planomy.net/
- type: Support
  url: mailto:support@planomy.net
- type: Pricing
  url: https://planomy.net/pricing
- type: SignUp
  url: https://planomy.net/app/
- type: TermsOfService
  url: https://planomy.net/legal/terms
- type: PrivacyPolicy
  url: https://planomy.net/legal/privacy
- type: Authentication
  url: authentication/planomy-tax-data-authentication.yml
- type: Conventions
  url: conventions/planomy-tax-data-conventions.yml
- type: ErrorCatalog
  url: errors/planomy-tax-data-problem-types.yml
- type: Lifecycle
  url: lifecycle/planomy-tax-data-lifecycle.yml
- type: Conformance
  url: conformance/planomy-tax-data-conformance.yml
- type: DataModel
  url: data-model/planomy-tax-data-data-model.yml
- type: Vocabulary
  url: vocabulary/planomy-tax-data-vocabulary.yml
- type: Plans
  url: plans/planomy-tax-data-plans-pricing.yml
- type: Components
  url: components/planomy-tax-data-components.yml
- type: X-MCPServerCandidate
  url: mcp/planomy-tax-data-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: AgentSkill
  url: skills/_index.yml
x-enrichment:
  date: '2026-08-09'
  status: enriched
  artifacts_added: 23
  pass: local-v1

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Planomy Tax Data

Kin Score

APIs 1

Planomy Tax Data Tax Data API

Open Collections 2

API Collection

Planomy JSON Tax Data API

Pricing Plans 1

Planomy Tax Data Plans Pricing

JSON Schema 2

Planomy Tax Data Index

Planomy Tax Year Dataset

Examples 2

Planomy Tax Data 2026

Planomy Tax Data Index

Security Posture 2

Planomy Tax Data Authentication

Planomy Tax Data Domain Security

Agentic Access 1

Planomy Tax Data Agentic Access

Resources

Get Started 1

Agent Surfaces 3

Design & Contract 7

Access & Security 2

Operate 1

Commercial 4

Company 1

Other 1

Source (apis.yml)

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