# Kintsugi

**Canonical:** https://apis.io/providers/kintsugi/  
**Website:** https://www.trykintsugi.com  
**APIs profiled:** 9

Kintsugi is an AI-driven sales tax compliance and automation platform that calculates US sales tax, VAT, and GST in real time, monitors economic and physical nexus, manages exemptions and registrations, and auto-prepares and files returns. Its REST API exposes tax estimation, transactions, products, address validation, nexus, exemptions, registrations, and filings, authenticated with an API key plus organization ID header.

## Kin Score — 35.9 / 100 (thin)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 35.9).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 52.9 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 23.7 |
| Developer Ergonomics | 21.4 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

## Agent readiness — 19.8 (agent-aware)

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

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (9)

- **Kintsugi Address Validation API** — Address search and suggestions for jurisdiction assignment.
- **Kintsugi Customers API** — Customer records and their transactions.
- **Kintsugi Exemptions API** — Customer tax exemptions and certificates.
- **Kintsugi Filings API** — Prepared and submitted sales tax returns.
- **Kintsugi Nexus API** — Physical and economic nexus tracking.
- **Kintsugi Products API** — Product records and taxability classification.
- **Kintsugi Registrations API** — State tax registrations.
- **Kintsugi Tax Estimation API** — Real-time sales tax, VAT, and GST estimation.
- **Kintsugi Transactions API** — Committed sales transactions and credit notes.

## Agentic access (1)

- **Kintsugi Agentic Access** — 39 operations · 17 acting

## Security (2)

- **Kintsugi Authentication** — apiKey · 2 schemes
- **Kintsugi Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Kintsugi Plans Pricing**

## Tags

Sales Tax, Tax Compliance, Tax Automation, VAT, GST, Nexus, Artificial Intelligence

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