# Capital Gains Tax HQ

**Canonical:** https://apis.io/providers/capitalgainstaxhq-com/  
**Website:** https://capitalgainstaxhq.com/  
**APIs profiled:** 1

Capital Gains Tax HQ provides a calculator that quotes the IRS and six US taxing authorities word‑for‑word, publishing the source text and date for each capital gains question. The site aggregates official tax information, offering transparent, up‑to‑date guidance on capital gains across multiple states. It aims to help individuals understand tax liabilities with precise, sourced excerpts from government publications.

## Kin Score — 28.6 / 100 (thin)

Scored 2026-11-06 under rubric 0.27.0.

| Facet | Score |
|---|---|
| Discoverability | 65.0 |
| Contract Quality | 48.8 |
| Contract Governance | 22.0 |
| Operational Transparency | 5.3 |
| Developer Ergonomics | 13.7 |
| Access Clarity | 10.5 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 26.5 (matched via fallback).

## Agent readiness — 24.3 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | derived |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | yes |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |
| Pagination Ratio | na |
| Operation Distinctiveness | distinct |
| MCP Tool Quality | na |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## APIs (3)

- **Capital Gains Tax HQ Dataset API** — dataset
- **Capital Gains Tax HQ Enquiry API** — enquiry
- **Capital Gains Tax HQ MCP API** — The mcp API from Capital Gains Tax HQ — 1 operation(s) for mcp.

## MCP servers (1)

- **Capital Gains Tax HQ MCP Server** — Remote MCP server at capitalgainstaxhq.com requiring an API key.

## Agentic access (1)

- **Capitalgainstaxhq Com Agentic Access** — 12 operations · 10 acting

## Security (3)

- **Capitalgainstaxhq Com Authentication** — http · 1 scheme
- **Capitalgainstaxhq Com Domain Security** — TLSv1.3 · HSTS
- **Capitalgainstaxhq Com Vulnerability Disclosure** — security.txt · contact published

## Tags

Finance, Tax, Calculator, United States, Capital Gains

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/capitalgainstaxhq-com/). Scores are computed from the provider's own public artifacts under a published rubric.