Head to head · Tax calculate · October 2026 research run
Anrok vs Avalara AvaTax
Avalara AvaTax scores 68.8 (B) on agent readiness against Anrok's 61.6 (C), and leads in 6 of 7 scored categories. Anrok leads on reliability. Both do tax calculate.
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 62
Watch for
No self-serve signup. Starter is $100 per market a month through "Talk to us", and Custom is quoted by sales
Good for An agent that must calculate and record US sales tax at address level, with VAT and GST in other countries, and hand the records to filing.
Ahead on
- Schema & documentation, 85 against 71
- Agent ergonomics, 84 against 70
- Security & auth, 65 against 59
- Payments & pricing, 30 against 15
- Maintenance & community, 79 against 47
- Transparency & trust, 79 against 54
Watch for
Production rate limits are not published. The only numbers found are the trial limits and 5 calls a minute on report exports
Score by category
| Category | Weight this run | Anrok | Avalara AvaTax | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 88 | 62 | Anrok +26 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 71 | 85 | Avalara AvaTax +14 |
| Agent ergonomics | 13%16.2 | 70 | 84 | Avalara AvaTax +14 |
| Security & auth | 14%17.5 | 59 | 65 | Avalara AvaTax +6 |
| Payments & pricing | 10%12.5 | 15 | 30 | Avalara AvaTax +15 |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 47 | 79 | Avalara AvaTax +32 |
| Transparency & trust | 7%8.8 | 54 | 79 | Avalara AvaTax +25 |
| Negative events | ≤15 | 0 | 0 | |
| Total | 61.6 · C | 68.8 · B |
Facts side by side
| Fact | Anrok | Avalara AvaTax |
|---|---|---|
| Kind | HTTP API | HTTP API |
| Vendor | Anrok, Inc. | Avalara, Inc. |
| Hosted endpoint | https://api.anrok.com | https://rest.avatax.com/api/v2 |
| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP |
| Auth | OAuth or key | OAuth or key |
| Pricing | Paid | Paid |
| x402 | no | no |
| Licence | Proprietary service under the Anrok SaaS Services Agreement. The OpenAPI file states "All rights reserved" | Proprietary service under the Avalara Service Terms. The SDKs on GitHub are Apache-2.0. The MCP repository holds a README only, with no licence file |
| Tools exposed | 31 | 10 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | not listed | com.avalara/avatax |
| Last release | 2026-10-06 | 2026-09-16 |
| Terms last updated | 2026-07-01 | 2023-05-01 |
| Privacy policy last updated | 2026-07-01 | 2022-08-08 |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | yes | not found in the text |
| Terms restrict benchmarking | yes | yes |
| Terms or service can change without notice | not found in the text | not found in the text |
| Arbitration or class-action waiver | not found in the text | not found in the text |
| Popularity | none | 5 stars, 331k npm/wk, 38k 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.
Avalara AvaTax
The REST API has a public Swagger file with 491 operations, a Markdown page per endpoint and a 90-day trial with no card. Production rate limits and prices per transaction are not published, the API patch notes stop at April 2023, and the tax calculation service was degraded for about 23 hours on 5 and 6 October 2026.
Before you call either
Anrok
- Send every call as a POST with a JSON body to https://api.anrok.com, including reads such as /v1/seller/products/list
- Call createEphemeral for a quote and createOrUpdate only when the invoice is final. createOrUpdate saves the transaction for filing
- Reuse the same transaction id on a retry. createOrUpdate overwrites by id, so a repeat doesn't create a second record
- 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
- On 429 wait the number of seconds in Retry-After. The default limit is 10 requests a second per seller account
Avalara AvaTax
- Omit
typeor send SalesOrder for an estimate. A type ending in Invoice is recorded, andcommitset to true locks it for reporting - Retry a timed-out invoice with CreateOrAdjustTransaction, not CreateTransaction, which errors when a committed transaction has the same code
- Use sandbox-rest.avatax.com with sandbox credentials for tests. Production is rest.avatax.com and the two accounts are separate
- Add
$include=SummaryOnlyor LinesOnly to shrink transaction responses, and page lists with$top(1,000 at most) and$skip - Call /api/v2/utilities/ping first. It answers without credentials and shows whether the credentials sent were accepted
Questions
Which is better for AI agents, Anrok or Avalara AvaTax?
Avalara AvaTax scores 68.8 (B) on agent readiness against Anrok's 61.6 (C), and leads in 6 of 7 scored categories. Anrok leads on reliability.
Do Anrok and Avalara AvaTax need an API key?
Both take an API key or an OAuth sign-in.
Can an agent call Anrok and Avalara AvaTax without installing anything?
Yes. Anrok has a hosted endpoint at https://api.anrok.com and Avalara AvaTax at https://rest.avatax.com/api/v2.
Other comparisons with Anrok or Avalara AvaTax
Machine-readable
- This page as Markdown
/compare/anrok-vs-avalara.md· slim.min.md· JSON.json(or sendAccept: text/markdown) - Each listing in full
/api/v1/tools/anrok.json·/api/v1/tools/avalara.json - From a terminal
anchor compare anrok avalara(the CLI) - Over MCP
compare_tools {"a": "anrok", "b": "avalara"}at/mcp, no key