# Numeral vs TaxCloud

> TaxCloud scores 57.4 (C) on agent readiness against Numeral's 49.3 (D), and leads in 3 of 7 scored categories. Numeral leads on schema & documentation and agent ergonomics. Both do tax calculate. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/numeral-vs-taxcloud
- Markdown: https://www.anchorterminal.com/compare/numeral-vs-taxcloud.md (~2,200 tokens)
- Slim: https://www.anchorterminal.com/compare/numeral-vs-taxcloud.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/numeral-vs-taxcloud.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-08

TaxCloud scores 57.4 (C) on agent readiness against Numeral's 49.3 (D), and leads in 3 of 7 scored categories. Numeral leads on schema & documentation and agent ergonomics. Both do tax calculate.

- Numeral: grade D, 49.3/100, rank #611 of 722. Markdown https://www.anchorterminal.com/tools/numeral.md · JSON https://www.anchorterminal.com/api/v1/tools/numeral.json
- TaxCloud: grade C, 57.4/100, rank #475 of 722. Markdown https://www.anchorterminal.com/tools/taxcloud.md · JSON https://www.anchorterminal.com/api/v1/tools/taxcloud.json

## Which one, for what

### 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 75
- Agent ergonomics, 71 against 64

Watch for: No status page, uptime SLA or numeric rate limit was found. The product page says rate limits can be removed on request

### TaxCloud (C)

Good for: An agent working for a US seller that needs tax on a cart at checkout, a record of orders and refunds for filing, and exemption certificates by customer.

Ahead on:
- Reliability, 66 against 25
- Payments & pricing, 34 against 10
- Transparency & trust, 51 against 45

Also in its favour:
- Free to start without a card

Watch for: No rate limit numbers are published. The API page says only that the threshold is high and subject to change


## Score by category

| Category | Weight | Numeral | TaxCloud | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 25 | 66 | TaxCloud +41 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 87 | 75 | Numeral +12 |
| Agent ergonomics | 13% (16.2 this run) | 71 | 64 | Numeral +7 |
| Security & auth | 14% (17.5 this run) | 47 | 45 | Numeral +2 |
| Payments & pricing | 10% (12.5 this run) | 10 | 34 | TaxCloud +24 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 60 | 57 | Numeral +3 |
| Transparency & trust | 7% (8.8 this run) | 45 | 51 | TaxCloud +6 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **49.3 · D** | **57.4 · C** | |

## Facts side by side

| Fact | Numeral | TaxCloud |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Numeral Two, Inc. | The Federal Tax Authority, LLC (TaxCloud) |
| Hosted endpoint | `https://api.numeralhq.com` | `https://api.v3.taxcloud.com` |
| Transports | HTTP, Streamable HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Paid | Paid |
| x402 | no | no |
| Licence | Proprietary service under Numeral's terms of service. The Go, Python and Node SDKs are Apache-2.0 | Proprietary service under TaxCloud's terms of service. The agent skills repository on GitHub is Apache-2.0 |
| Tools exposed | 14 | none |
| Read-only variant documented | yes | no |
| llms.txt | yes | yes |
| Last release | 2026-09-15 | 2026-09-24 |
| Terms last updated | no date given | 2025-03-01 |
| Privacy policy last updated | no document linked | 2025-02-01 |
| Customer content may train models | not found in the text | yes |
| Terms restrict automated access | not found in the text | yes |
| Terms restrict benchmarking | not found in the text | yes |
| Terms or service can change without notice | not found in the text | yes |
| Arbitration or class-action waiver | yes | not found in the text |
| Popularity | 0 stars, 9 npm/wk, 19 PyPI/wk | 0 stars |

## Verdicts

**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.

**TaxCloud.** A 30-operation REST API with a public OpenAPI 3.1 contract, llms.txt, Markdown docs and a 30-day trial that needs no card. The vendor publishes no rate limit numbers, no SLA, no API changelog and no official v3 client library, and the security page names no audit or certification.

## Before you call either

### Numeral

1. Send `X-API-Version: 2026-03-01` on every call to `https://api.numeralhq.com`. Merchant, platform and certificate endpoints reject requests without it
2. Commit with a stable `reference_order_id`. On `REFERENCE_ORDER_ID_ALREADY_EXISTS` look up the existing transaction, because `Idempotency-Key` is ignored
3. Commit before the calculation's `expires_at`. If it has expired, calculate again and commit the new `calculation_id` with the original `reference_order_id`
4. Send `amount` as the line total in minor units to `/tax/calculations` and as the per-unit price to `/tax/platform/calculations`
5. Start with an `sk_test_` key. Certificate endpoints and MCP certificate tools are live only and answer `TESTMODE_NOT_SUPPORTED` or `live_mode_required`

### TaxCloud

1. Send `X-API-KEY` on every call and put the connection ID in the path, as in `/tax/connections/{connectionId}/carts`. A wrong ID returns 404
2. Mark nexus states active in the account first. With none active the API returns zero tax and no error
3. Use a separate test connection. There is no sandbox, and orders on a live connection go into filing
4. Pass a stable `idempotencyKey` on refunds, and never convert the same cart twice. A second conversion creates a duplicate liability
5. Void a wrong order before 12:00 AM Eastern on the 10th of the month after its `completedDate`. Later requests return 422

## Questions

### Which is better for AI agents, Numeral or TaxCloud?

TaxCloud scores 57.4 (C) on agent readiness against Numeral's 49.3 (D), and leads in 3 of 7 scored categories. Numeral leads on schema & documentation and agent ergonomics.

### Do Numeral and TaxCloud need an API key?

Both need an API key.

### Can an agent call Numeral and TaxCloud without installing anything?

Yes. Numeral has a hosted endpoint at https://api.numeralhq.com and TaxCloud at https://api.v3.taxcloud.com.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/numeral-vs-taxcloud.json, and with the fewest tokens: https://www.anchorterminal.com/compare/numeral-vs-taxcloud.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "numeral", "b": "taxcloud"}`. From a terminal: `anchor compare numeral taxcloud`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/numeral.json and https://www.anchorterminal.com/api/v1/tools/taxcloud.json

## Other comparisons with Numeral or TaxCloud

- [Anrok vs Numeral](https://www.anchorterminal.com/compare/anrok-vs-numeral.md)
- [Anrok vs TaxCloud](https://www.anchorterminal.com/compare/anrok-vs-taxcloud.md)
- [Avalara AvaTax vs Numeral](https://www.anchorterminal.com/compare/avalara-vs-numeral.md)
- [Avalara AvaTax vs TaxCloud](https://www.anchorterminal.com/compare/avalara-vs-taxcloud.md)
- [Fonoa vs Numeral](https://www.anchorterminal.com/compare/fonoa-vs-numeral.md)
- [Fonoa vs TaxCloud](https://www.anchorterminal.com/compare/fonoa-vs-taxcloud.md)
- [Kintsugi vs Numeral](https://www.anchorterminal.com/compare/kintsugi-vs-numeral.md)
- [Kintsugi vs TaxCloud](https://www.anchorterminal.com/compare/kintsugi-vs-taxcloud.md)
- [Numeral vs Quaderno](https://www.anchorterminal.com/compare/numeral-vs-quaderno.md)
- [Numeral vs TaxJar](https://www.anchorterminal.com/compare/numeral-vs-taxjar.md)
- [Numeral vs Vertex O Series](https://www.anchorterminal.com/compare/numeral-vs-vertex-tax.md)
- [Numeral vs Zamp](https://www.anchorterminal.com/compare/numeral-vs-zamp.md)
- [Quaderno vs TaxCloud](https://www.anchorterminal.com/compare/quaderno-vs-taxcloud.md)
- [TaxCloud vs TaxJar](https://www.anchorterminal.com/compare/taxcloud-vs-taxjar.md)
- [TaxCloud vs Vertex O Series](https://www.anchorterminal.com/compare/taxcloud-vs-vertex-tax.md)
- [TaxCloud vs Zamp](https://www.anchorterminal.com/compare/taxcloud-vs-zamp.md)