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Head to head · Tax calculate · October 2026 research run

Anrok vs Kintsugi

Anrok and Kintsugi score within a point of each other on agent readiness, 61.6 (C) and 60.7 (C). Kintsugi leads on schema & documentation, agent ergonomics, maintenance & community and transparency & trust. Both do tax calculate.

AnrokAnrok, Inc. · HTTP API C61.6/100#361 of 722 KintsugiKintsugi AI, Inc. · HTTP API C60.7/100#392 of 722

Which one, for what

Anrok C

Good for An agent working for a software or ecommerce seller that already uses Anrok and wants calculation, exemption certificates and filing status in one account.

Ahead on

  • Reliability, 88 against 73
  • Security & auth, 59 against 52

Also in its favour

  • No incidents deducted, where Kintsugi loses 3 points for them

Watch for

No self-serve signup. Starter is $100 per market a month through "Talk to us", and Custom is quoted by sales

Kintsugi C

Good for An agent working for a seller that already has Kintsugi Premium and wants estimates, transaction sync, exemptions, nexus, registrations and filing status through one API, or read-only answers about an account through the OAuth MCP server.

Ahead on

  • Schema & documentation, 87 against 71
  • Agent ergonomics, 75 against 70
  • Maintenance & community, 78 against 47
  • Transparency & trust, 60 against 54

Watch for

API access, SDKs and real-time tax calculation are listed only under Premium, which is priced on request. API keys need a paid plan that includes them

Score by category

CategoryWeight this runAnrokKintsugiEdge
Reliability16%208873Anrok +15
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27187Kintsugi +16
Agent ergonomics13%16.27075Kintsugi +5
Security & auth14%17.55952Anrok +7
Payments & pricing10%12.51513Anrok +2
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.84778Kintsugi +31
Transparency & trust7%8.85460Kintsugi +6
Negative events≤150-3
Total61.6 · C60.7 · C

Facts side by side

FactAnrokKintsugi
KindHTTP APIHTTP API
VendorAnrok, Inc.Kintsugi AI, Inc.
Hosted endpointhttps://api.anrok.comhttps://api.trykintsugi.com
TransportsHTTP, Streamable HTTPHTTP, Streamable HTTP
AuthOAuth or keyOAuth or key
PricingPaidPaid
x402nono
LicenceProprietary service under the Anrok SaaS Services Agreement. The OpenAPI file states "All rights reserved"Proprietary service under the Kintsugi Terms of Service. The Python SDK repository is MIT
Tools exposed3155
Read-only variant documentednoyes
llms.txtyesyes
Last release2026-10-062026-10-07
Terms last updated2026-07-012026-09-29
Privacy policy last updated2026-07-012025-04-13
Customer content may train modelsnot found in the textyes
Terms restrict automated accessyesyes
Terms restrict benchmarkingyesyes
Terms or service can change without noticenot found in the textnot found in the text
Arbitration or class-action waivernot found in the textyes
Popularitynone71 npm/wk, 10 PyPI/wk

Verdicts

Anrok

The public OpenAPI 3.1 spec covers 26 operations with typed error codes, and the remote MCP server uses OAuth 2.1 with six scopes and keeps voids, refunds and filing approval away from the model. Access needs a seller account arranged through sales, API keys carry no scopes, and no API changelog, SDK or subprocessor list was found.

Kintsugi

The docs are built for machine readers, with llms.txt, Markdown pages, a public OpenAPI 3.1 file, a dated changelog and an MCP server whose 55 tools carry read-only and destructive annotations. API keys need the custom-priced Premium plan and carry no scopes, no general rate limit is published, and breaking changes reached the pinned 2026-07-21 release in October 2026.

Before you call either

Anrok

  1. Send every call as a POST with a JSON body to https://api.anrok.com, including reads such as /v1/seller/products/list
  2. Call createEphemeral for a quote and createOrUpdate only when the invoice is final. createOrUpdate saves the transaction for filing
  3. Reuse the same transaction id on a retry. createOrUpdate overwrites by id, so a repeat doesn't create a second record
  4. Expect transactionFrozenForFiling once a transaction is on a filed return. Negate it with createNegation and write a new id with a suffix such as :s2
  5. On 429 wait the number of seconds in Retry-After. The default limit is 10 requests a second per seller account

Kintsugi

  1. Send Api-Key and pin Api-Version (for example 2026-10-06) on Tenanted API calls to https://api.trykintsugi.com. Without the header a request runs against 2026-07-21
  2. Use x-api-key and x-organization-id with /v1 paths for the SDKs and the docs MCP server. They don't cover the Tenanted API
  3. Call POST /tax-estimations for a quote. Nothing is stored. Record the sale with a transaction create, which answers 202, then check processingStatus before reading tax totals
  4. Always send externalId on creates. A repeat with the same externalId and source returns the stored record with 200 and doesn't apply the new fields
  5. Branch on the error code, not the message. Retry 429, 500 and 503 with exponential backoff, and restart paging from the first page on stale_cursor

Questions

Which is better for AI agents, Anrok or Kintsugi?

Anrok and Kintsugi score within a point of each other on agent readiness, 61.6 (C) and 60.7 (C). Kintsugi leads on schema & documentation, agent ergonomics, maintenance & community and transparency & trust.

Do Anrok and Kintsugi need an API key?

Both take an API key or an OAuth sign-in.

Can an agent call Anrok and Kintsugi without installing anything?

Yes. Anrok has a hosted endpoint at https://api.anrok.com and Kintsugi at https://api.trykintsugi.com.

Other comparisons with Anrok or Kintsugi

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