Head to head · Tax calculate · October 2026 research run
Anrok vs Numeral
Anrok scores 61.6 (C) on agent readiness against Numeral's 49.3 (D), and leads in 4 of 7 scored categories. Numeral leads on schema & documentation and maintenance & community. 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 25
- Security & auth, 59 against 47
- Payments & pricing, 15 against 10
- Transparency & trust, 54 against 45
Watch for
No self-serve signup. Starter is $100 per market a month through "Talk to us", and Custom is quoted by sales
Numeral D
Good for An agent working for a seller or platform that has a Numeral account and needs tax at checkout, committed transactions for filing, and read access to nexus, registrations and filings through MCP.
Ahead on
- Schema & documentation, 87 against 71
- Maintenance & community, 60 against 47
Watch for
No status page, uptime SLA or numeric rate limit was found. The product page says rate limits can be removed on request
Score by category
| Category | Weight this run | Anrok | Numeral | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 88 | 25 | Anrok +63 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 71 | 87 | Numeral +16 |
| Agent ergonomics | 13%16.2 | 70 | 71 | Numeral +1 |
| Security & auth | 14%17.5 | 59 | 47 | Anrok +12 |
| Payments & pricing | 10%12.5 | 15 | 10 | Anrok +5 |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 47 | 60 | Numeral +13 |
| Transparency & trust | 7%8.8 | 54 | 45 | Anrok +9 |
| Negative events | ≤15 | 0 | 0 | |
| Total | 61.6 · C | 49.3 · D |
Facts side by side
| Fact | Anrok | Numeral |
|---|---|---|
| Kind | HTTP API | HTTP API |
| Vendor | Anrok, Inc. | Numeral Two, Inc. |
| Hosted endpoint | https://api.anrok.com | https://api.numeralhq.com |
| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP |
| Auth | OAuth or key | API 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 Numeral's terms of service. The Go, Python and Node SDKs are Apache-2.0 |
| Tools exposed | 31 | 14 |
| Read-only variant documented | no | yes |
| llms.txt | yes | yes |
| Last release | 2026-10-06 | 2026-09-15 |
| Terms last updated | 2026-07-01 | no date given |
| Privacy policy last updated | 2026-07-01 | no document linked |
| 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 | not found in the text |
| 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 | yes |
| Popularity | none | 0 stars, 9 npm/wk, 19 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.
Numeral
Docs are written for agents, with a public OpenAPI spec for 32 operations, Markdown pages, llms.txt and a remote MCP server whose 14 tools are read-only by default. No status page, numeric rate limit or SLA was found, the API ignores idempotency keys, and API access is sold on a custom plan after a demo.
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
Numeral
- Send
X-API-Version: 2026-03-01on every call tohttps://api.numeralhq.com. Merchant, platform and certificate endpoints reject requests without it - Commit with a stable
reference_order_id. OnREFERENCE_ORDER_ID_ALREADY_EXISTSlook up the existing transaction, becauseIdempotency-Keyis ignored - Commit before the calculation's
expires_at. If it has expired, calculate again and commit the newcalculation_idwith the originalreference_order_id - Send
amountas the line total in minor units to/tax/calculationsand as the per-unit price to/tax/platform/calculations - Start with an
sk_test_key. Certificate endpoints and MCP certificate tools are live only and answerTESTMODE_NOT_SUPPORTEDorlive_mode_required
Questions
Which is better for AI agents, Anrok or Numeral?
Anrok scores 61.6 (C) on agent readiness against Numeral's 49.3 (D), and leads in 4 of 7 scored categories. Numeral leads on schema & documentation and maintenance & community.
Do Anrok and Numeral need an API key?
Anrok takes an API key or an OAuth sign-in. Numeral needs an API key.
Can an agent call Anrok and Numeral without installing anything?
Yes. Anrok has a hosted endpoint at https://api.anrok.com and Numeral at https://api.numeralhq.com.
Other comparisons with Anrok or Numeral
Machine-readable
- This page as Markdown
/compare/anrok-vs-numeral.md· slim.min.md· JSON.json(or sendAccept: text/markdown) - Each listing in full
/api/v1/tools/anrok.json·/api/v1/tools/numeral.json - From a terminal
anchor compare anrok numeral(the CLI) - Over MCP
compare_tools {"a": "anrok", "b": "numeral"}at/mcp, no key