Kintsugi

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.

Kintsugi publishes 9 API contracts indexed on the APIs.io network, including Address Validation API, Customers API, Exemptions API, and 6 more. Tagged areas include Sales Tax, Tax Compliance, Tax Automation, VAT, and GST.

The Kintsugi catalog on APIs.io includes 1 Spectral governance ruleset.

Kintsugi’s developer surface includes pricing, engineering blog, authentication, documentation, and 9 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

37.3/100 thin ▬ flat Agent 44/100 agent ready Front door AI 5/6 prominent Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract 1 MCP Servers

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

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Tax Management

BC-220

ExemptionsFilingsNexusRegistrationsTax EstimationTransactions

POST /tax/estimate GET /filings GET /filings/{filing_id}/transactions POST /exemptions

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 37.3/100 · thin

Contract Quality 8.9 / 19

Developer Ergonomics 4.8 / 15

Access Clarity 5.1 / 15

Operational Transparency 2.3 / 10

Contract Governance 1.2 / 9

Discoverability 5.1 / 8

Regulatory Posture 0.8 / 15

Create-or-Update Ergonomics 2.8 / 10

Agent readiness — 44/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 0 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) 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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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):

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) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link Ask about this →
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks Ask about this →
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too Ask about this →

6 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 32.1 — up to +13.6 composite points Ask about this →
Access Clarity scores 34.0 — up to +13.2 composite points Ask about this →
Contract Quality scores 47.7 — up to +13.1 composite points Ask about this →

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.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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/kintsugi/apis.yml: open an issue on github.com/api-evangelist/kintsugi 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
E-invoicing and Tax Compliance (certified operators)	builds-on	51.7	-	-
Stripe App Marketplace and Partner Ecosystem (builders on Stripe)	builds-on	51.7	-	-
Amazon Seller Ecosystem (Selling Partner Appstore, Amazon Ads partners)	builds-on	51.7	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 4

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 (verified)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

OpenAPI

measured — observed by APIs.io (published)

APIs 9

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

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.

Scroll for all 9

Open Collections 10

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

Kintsugi Tax Address Validation API

OPEN COLLECTION

Kintsugi Tax Address Validation Customers API

OPEN COLLECTION

Kintsugi Tax Address Validation Exemptions API

OPEN COLLECTION

Kintsugi Tax Address Validation Filings API

OPEN COLLECTION

Kintsugi Tax Address Validation Nexus API

OPEN COLLECTION

Kintsugi Tax Address Validation Products API

OPEN COLLECTION

Kintsugi Tax Address Validation Registrations API

OPEN COLLECTION

Kintsugi Tax Address Validation Tax Estimation API

OPEN COLLECTION

Kintsugi Tax Address Validation Transactions API

OPEN COLLECTION

Kintsugi Tax API

OPEN COLLECTION

Scroll for all 10

MCP Servers 1

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

Kintsugi MCP Server

Remote MCP server at mcp.trykintsugi.com over HTTP.

MCP SERVER

Kintsugi API pricing

Prices published by Kintsugi, read 2026-10-07 from trykintsugi.com/pricing.

Plan	Price
Free	$0 Includes: Global exposure (nexus) monitoring, historical liability auditing, nexus threshold alerts, AI-powere
Starter	Starting at $75 Includes: Automated registrations, filings, remittance; basic ECM; virtual mailbox; 24/7 live chat
Premium	Custom Includes: Multi-country compliance, API/SDK/SSO, VDAs, dedicated teams; flat-rate pricing with volume-based di

Plan details, limits and sources →

Rate limits

Rate limit: Over 10,000 requests per minute

Rate-limit details →

Pricing Plans 1

Published pricing tiers and plan structures.

Kintsugi Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Kintsugi Rate Limits

1 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Kintsugi Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

Kintsugi API Rules

61 rules · 56 error-severity 3 warn-severity 2 info-severity

SPECTRAL

Security Posture 2

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

Kintsugi Authentication

apiKey · 2 schemes

SECURITY

Kintsugi Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

Kintsugi Agentic Access

39 operations · 16 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

Blog

Blog

LinkedIn

Website

Website

Other 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

aid: kintsugi
url: https://raw.githubusercontent.com/api-evangelist/kintsugi/refs/heads/main/apis.yml
name: Kintsugi
kind: company
description: 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.
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: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/kintsugi.png
tags:
- Sales Tax
- Tax Compliance
- Tax Automation
- VAT
- GST
- Nexus
- Artificial Intelligence
- Tax
tags_raw:
- Sales Tax
- Tax Compliance
- Tax Automation
- VAT
- GST
- Nexus
- AI
- Tax
created: '2026-06-21'
modified: '2026-10-06'
specificationVersion: '0.23'
apis:
- aid: kintsugi:kintsugi-address-validation-api
  name: Kintsugi Address Validation API
  description: Address search and suggestions for jurisdiction assignment.
  humanURL: https://docs.trykintsugi.com/docs/api-guides/sales-tax-calculations
  baseURL: https://api.trykintsugi.com/v1
  tags:
  - Address Validation
  properties:
  - type: OpenAPI
    url: openapi/kintsugi-address-validation-api-openapi.yml
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/sales-tax-calculations
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/tax-estimation/estimate-tax
  - type: PostmanCollection
    url: collections/kintsugi.postman_collection.json
  - type: OpenCollection
    url: collections/kintsugi.opencollection.json
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/syncing-transaction-records
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/transactions/create-transaction
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/product-customer-records
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/products/create-product
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/address-validation/search
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/nexus/get-nexus-for-org
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/exemptions/get-exemptions
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/exemptions/create-exemption
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/filings/get-filings
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/filings/get-filing-by-id
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/guides/integrating-kintsugis-api
- aid: kintsugi:kintsugi-customers-api
  name: Kintsugi Customers API
  description: Customer records and their transactions.
  humanURL: https://docs.trykintsugi.com/docs/api-guides/sales-tax-calculations
  baseURL: https://api.trykintsugi.com/v1
  tags:
  - Customers
  properties:
  - type: OpenAPI
    url: openapi/kintsugi-customers-api-openapi.yml
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/sales-tax-calculations
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/tax-estimation/estimate-tax
  - type: PostmanCollection
    url: collections/kintsugi.postman_collection.json
  - type: OpenCollection
    url: collections/kintsugi.opencollection.json
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/syncing-transaction-records
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/transactions/create-transaction
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/product-customer-records
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/products/create-product
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/address-validation/search
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/nexus/get-nexus-for-org
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/exemptions/get-exemptions
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/exemptions/create-exemption
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/filings/get-filings
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/filings/get-filing-by-id
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/guides/integrating-kintsugis-api
- aid: kintsugi:kintsugi-exemptions-api
  name: Kintsugi Exemptions API
  description: Customer tax exemptions and certificates.
  humanURL: https://docs.trykintsugi.com/docs/api-guides/sales-tax-calculations
  baseURL: https://api.trykintsugi.com/v1
  tags:
  - Exemptions
  properties:
  - type: OpenAPI
    url: openapi/kintsugi-exemptions-api-openapi.yml
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/sales-tax-calculations
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/tax-estimation/estimate-tax
  - type: PostmanCollection
    url: collections/kintsugi.postman_collection.json
  - type: OpenCollection
    url: collections/kintsugi.opencollection.json
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/syncing-transaction-records
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/transactions/create-transaction
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/product-customer-records
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/products/create-product
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/address-validation/search
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/nexus/get-nexus-for-org
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/exemptions/get-exemptions
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/exemptions/create-exemption
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/filings/get-filings
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/filings/get-filing-by-id
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/guides/integrating-kintsugis-api
- aid: kintsugi:kintsugi-filings-api
  name: Kintsugi Filings API
  description: Prepared and submitted sales tax returns.
  humanURL: https://docs.trykintsugi.com/docs/api-guides/sales-tax-calculations
  baseURL: https://api.trykintsugi.com/v1
  tags:
  - Filings
  properties:
  - type: OpenAPI
    url: openapi/kintsugi-filings-api-openapi.yml
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/sales-tax-calculations
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/tax-estimation/estimate-tax
  - type: PostmanCollection
    url: collections/kintsugi.postman_collection.json
  - type: OpenCollection
    url: collections/kintsugi.opencollection.json
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/syncing-transaction-records
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/transactions/create-transaction
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/product-customer-records
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/products/create-product
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/address-validation/search
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/nexus/get-nexus-for-org
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/exemptions/get-exemptions
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/exemptions/create-exemption
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/filings/get-filings
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/filings/get-filing-by-id
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/guides/integrating-kintsugis-api
- aid: kintsugi:kintsugi-nexus-api
  name: Kintsugi Nexus API
  description: Physical and economic nexus tracking.
  humanURL: https://docs.trykintsugi.com/docs/api-guides/sales-tax-calculations
  baseURL: https://api.trykintsugi.com/v1
  tags:
  - Nexus
  properties:
  - type: OpenAPI
    url: openapi/kintsugi-nexus-api-openapi.yml
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/sales-tax-calculations
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/tax-estimation/estimate-tax
  - type: PostmanCollection
    url: collections/kintsugi.postman_collection.json
  - type: OpenCollection
    url: collections/kintsugi.opencollection.json
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/syncing-transaction-records
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/transactions/create-transaction
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/product-customer-records
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/products/create-product
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/address-validation/search
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/nexus/get-nexus-for-org
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/exemptions/get-exemptions
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/exemptions/create-exemption
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/filings/get-filings
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/filings/get-filing-by-id
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/guides/integrating-kintsugis-api
- aid: kintsugi:kintsugi-products-api
  name: Kintsugi Products API
  description: Product records and taxability classification.
  humanURL: https://docs.trykintsugi.com/docs/api-guides/sales-tax-calculations
  baseURL: https://api.trykintsugi.com/v1
  tags:
  - Product
  tags_raw:
  - Products
  properties:
  - type: OpenAPI
    url: openapi/kintsugi-products-api-openapi.yml
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/sales-tax-calculations
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/tax-estimation/estimate-tax
  - type: PostmanCollection
    url: collections/kintsugi.postman_collection.json
  - type: OpenCollection
    url: collections/kintsugi.opencollection.json
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/syncing-transaction-records
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/transactions/create-transaction
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/product-customer-records
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/products/create-product
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/address-validation/search
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/nexus/get-nexus-for-org
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/exemptions/get-exemptions
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/exemptions/create-exemption
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/filings/get-filings
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/filings/get-filing-by-id
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/guides/integrating-kintsugis-api
- aid: kintsugi:kintsugi-registrations-api
  name: Kintsugi Registrations API
  description: State tax registrations.
  humanURL: https://docs.trykintsugi.com/docs/api-guides/sales-tax-calculations
  baseURL: https://api.trykintsugi.com/v1
  tags:
  - Registrations
  properties:
  - type: OpenAPI
    url: openapi/kintsugi-registrations-api-openapi.yml
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/sales-tax-calculations
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/tax-estimation/estimate-tax
  - type: PostmanCollection
    url: collections/kintsugi.postman_collection.json
  - type: OpenCollection
    url: collections/kintsugi.opencollection.json
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/syncing-transaction-records
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/transactions/create-transaction
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/product-customer-records
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/products/create-product
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/address-validation/search
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/nexus/get-nexus-for-org
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/exemptions/get-exemptions
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/exemptions/create-exemption
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/filings/get-filings
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/filings/get-filing-by-id
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/guides/integrating-kintsugis-api
- aid: kintsugi:kintsugi-tax-estimation-api
  name: Kintsugi Tax Estimation API
  description: Real-time sales tax, VAT, and GST estimation.
  humanURL: https://docs.trykintsugi.com/docs/api-guides/sales-tax-calculations
  baseURL: https://api.trykintsugi.com/v1
  tags:
  - Tax Estimation
  properties:
  - type: OpenAPI
    url: openapi/kintsugi-tax-estimation-api-openapi.yml
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/sales-tax-calculations
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/tax-estimation/estimate-tax
  - type: PostmanCollection
    url: collections/kintsugi.postman_collection.json
  - type: OpenCollection
    url: collections/kintsugi.opencollection.json
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/syncing-transaction-records
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/transactions/create-transaction
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/product-customer-records
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/products/create-product
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/address-validation/search
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/nexus/get-nexus-for-org
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/exemptions/get-exemptions
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/exemptions/create-exemption
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/filings/get-filings
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/filings/get-filing-by-id
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/guides/integrating-kintsugis-api
- aid: kintsugi:kintsugi-transactions-api
  name: Kintsugi Transactions API
  description: Committed sales transactions and credit notes.
  humanURL: https://docs.trykintsugi.com/docs/api-guides/sales-tax-calculations
  baseURL: https://api.trykintsugi.com/v1
  tags:
  - Transaction
  tags_raw:
  - Transactions
  properties:
  - type: OpenAPI
    url: openapi/kintsugi-transactions-api-openapi.yml
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/sales-tax-calculations
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/tax-estimation/estimate-tax
  - type: PostmanCollection
    url: collections/kintsugi.postman_collection.json
  - type: OpenCollection
    url: collections/kintsugi.opencollection.json
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/syncing-transaction-records
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/transactions/create-transaction
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/api-guides/product-customer-records
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/products/create-product
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/address-validation/search
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/nexus/get-nexus-for-org
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/exemptions/get-exemptions
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/exemptions/create-exemption
  - type: Documentation
    url: https://docs.trykintsugi.com/reference/api/filings/get-filings
  - type: APIReference
    url: https://docs.trykintsugi.com/reference/api/filings/get-filing-by-id
  - type: Documentation
    url: https://docs.trykintsugi.com/docs/guides/integrating-kintsugis-api
common:
- type: Pricing
  url: https://trykintsugi.com/pricing
- url: https://trykintsugi.com/blog
  type: Blog
- type: CapabilityMap
  url: capabilities/kintsugi-capability-edges.yml
  name: Kintsugi Business Capability Map
- type: AgenticAccess
  url: agentic-access/kintsugi-agentic-access.yml
- type: DomainSecurity
  url: security/kintsugi-domain-security.yml
- type: Authentication
  url: authentication/kintsugi-authentication.yml
- type: GitHubOrganization
  url: https://github.com/kintsugi-tax
- type: LinkedIn
  url: https://www.linkedin.com/company/trykintsugi
- type: Website
  url: https://www.trykintsugi.com
- type: Documentation
  url: https://docs.trykintsugi.com
- type: Plans
  url: plans/kintsugi-plans-pricing.yml
- type: RateLimits
  url: rate-limits/kintsugi-rate-limits.yml
- type: FinOps
  url: finops/kintsugi-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Kintsugi API — frequently asked questions

Does Kintsugi have an API?

Yes. APIs.io lists 9 APIs from Kintsugi, including Kintsugi Address Validation API, Kintsugi Customers API and Kintsugi Exemptions API, and 6 more.

Is there an OpenAPI specification for the Kintsugi API?

Yes. APIs.io indexes 9 OpenAPI specifications for Kintsugi, each linked for download from this page.

How do I authenticate with the Kintsugi API?

Kintsugi documents its authentication (apiKey · 2 schemes). The details are profiled on APIs.io as Kintsugi Authentication.

How much does the Kintsugi API cost?

Kintsugi publishes its prices; its Free plan is $0 as of 2026-10-07. APIs.io lists 3 pricing plans for Kintsugi, with each plan's price, limits and inclusions under Pricing on this page.

Does Kintsugi have an MCP server?

Yes. APIs.io lists 1 MCP server for Kintsugi: Remote MCP server at mcp.trykintsugi.com over HTTP.

Is the Kintsugi API ready for AI agents?

Kintsugi has a Kin Score of 37.3 out of 100 (thin) and an Agent Readiness score of 44.2 (agent-ready), scored by API Evangelist on 2026-11-13.

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