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 contract indexed on the APIs.io network: Tax Data API. Tagged areas include Tax, Finance, Open Data, Retirement, and Government.

The Planomy Tax Data catalog on APIs.io includes 1 Spectral governance ruleset.

Planomy Tax Data’s developer surface includes support, pricing, signup flow, authentication, and 17 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

37.7/100 thin ▬ flat Agent 32/100 agent ready Front door AI 4/6 moderate Heartbeat 40/100 going silent saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumOpen⚡ Free to try

1 published contract 2 Agent Skills

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

Kin Score

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

Composite quality — 37.7/100 · thin

Contract Quality 4.0 / 21

Developer Ergonomics 6.0 / 17

Access Clarity 13.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 2.2 / 10

Discoverability 5.5 / 9

Regulatory Posture 3.7 / 15

Agent readiness — 32/100 · 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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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.

Create-or-Update Ergonomics does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

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):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
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)
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks

4 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 18.7 — up to +20.3 composite points
Operational Transparency scores 0.0 — up to +13.0 composite points
Developer Ergonomics scores 35.1 — up to +13.0 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/planomy-tax-data/apis.yml: open an issue on github.com/api-evangelist/planomy-tax-data to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 2

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

JSON

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

OpenAPI

measured — observed by APIs.io (published)

APIs 1

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

Planomy Tax Data Tax Data API

Dated, source-attributed US tax and retirement figures.

Open Collections 1

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

Planomy JSON Tax Data API

OPEN COLLECTION

Agent Skills 2

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

Cite a tax figure back to its federal source

AGENT SKILL

Fetch the current US tax and retirement figures

AGENT SKILL

Planomy Tax Data API pricing

Prices published by Planomy Tax Data, read 2026-08-09 from planomy.net/pricing. A free plan or tier is listed.

Plan	Price
Tax Data JSON API free	Free
Embeddable calculator widgets free	Free
Free (planner) free	Free
Plus (planner) subscription	$6 per monthly price / month · $60 per annual price / year
AI credit packs one-time	$1 per 10 credits · $4 per 50 credits

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Planomy Tax Data Plans Pricing

5 plans

PLANS

Service Levels 1

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

Planomy Tax Data

SLA

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Planomy Tax Data API Rules

58 rules · 56 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.

Planomy Tax Data Overlay

7 actions · update · planomy-tax-data-openapi.yml

DERIVED

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.

Planomy Tax Data 2026

16 fields

EXAMPLE

Planomy Tax Data Index

6 fields

EXAMPLE

Security Posture 2

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

Planomy Tax Data Authentication

0 schemes

SECURITY

Planomy Tax Data Domain Security

TLSv1.3 · HSTS

SECURITY

Agentic Access 1

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

Planomy Tax Data Agentic Access

2 operations

2 operations · 0 acting

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 2

The organization behind the API

BlogRSS

BlogRSS

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
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Open access
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://planomy.net/og/og-home.png
created: '2026-07-28'
modified: '2026-10-06'
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/
  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:
- url: https://planomy.net/feed.xml
  type: BlogRSS
- 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

Planomy Tax Data API — frequently asked questions

Does Planomy Tax Data have an API?

Yes. APIs.io lists 1 API from Planomy Tax Data, including Planomy Tax Data Tax Data API.

Is there an OpenAPI specification for the Planomy Tax Data API?

Yes. APIs.io indexes 1 OpenAPI specification for Planomy Tax Data, each linked for download from this page.

How do I authenticate with the Planomy Tax Data API?

Planomy Tax Data uses bearer-token authentication (0 schemes). The details are profiled on APIs.io as Planomy Tax Data Authentication.

How much does the Planomy Tax Data API cost?

Planomy Tax Data publishes its prices; its Plus (planner) plan is $6 per monthly price / month · $60 per annual price / year as of 2026-08-09. APIs.io lists 5 pricing plans for Planomy Tax Data, with each plan's price, limits and inclusions under Pricing on this page.

Is the Planomy Tax Data API ready for AI agents?

Planomy Tax Data has a Kin Score of 37.7 out of 100 (thin) and an Agent Readiness score of 31.9 (agent-ready), scored by API Evangelist on 2026-11-06.

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