# Anrok vs Quaderno

> Anrok scores 61.6 (C) on agent readiness against Quaderno's 59.5 (C), and leads in 3 of 7 scored categories. Quaderno leads on schema & documentation, payments & pricing and transparency & trust. Both do tax calculate. Category scores, facts, verdicts and agent notes side by…

- Canonical: https://www.anchorterminal.com/compare/anrok-vs-quaderno
- Markdown: https://www.anchorterminal.com/compare/anrok-vs-quaderno.md (~1,950 tokens)
- Slim: https://www.anchorterminal.com/compare/anrok-vs-quaderno.min.md (~630 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/anrok-vs-quaderno.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

Anrok scores 61.6 (C) on agent readiness against Quaderno's 59.5 (C), and leads in 3 of 7 scored categories. Quaderno leads on schema & documentation, payments & pricing and transparency & trust. Both do tax calculate.

- Anrok: grade C, 61.6/100, rank #321 of 629. Markdown https://www.anchorterminal.com/tools/anrok.md · JSON https://www.anchorterminal.com/api/v1/tools/anrok.json
- Quaderno: grade C, 59.5/100, rank #377 of 629. Markdown https://www.anchorterminal.com/tools/quaderno.md · JSON https://www.anchorterminal.com/api/v1/tools/quaderno.json

## 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:
- Agent ergonomics, 70 against 56
- Security & auth, 59 against 39
- Maintenance & community, 47 against 28

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

### Quaderno (C)

Good for: An agent working for a SaaS, digital-goods or e-commerce seller that needs a tax rate at checkout, a record of each sale with location evidence, and compliant invoices, including Spanish Verifactu and TicketBAI.

Ahead on:
- Schema & documentation, 77 against 71
- Payments & pricing, 30 against 15
- Transparency & trust, 76 against 54

Watch for: One API key reads and writes everything its user can reach. Scopes exist only on Connect OAuth tokens (read_only, read_write)


## Score by category

| Category | Weight | Anrok | Quaderno | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 88 | 91 | Quaderno +3 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 71 | 77 | Quaderno +6 |
| Agent ergonomics | 13% (16.2 this run) | 70 | 56 | Anrok +14 |
| Security & auth | 14% (17.5 this run) | 59 | 39 | Anrok +20 |
| Payments & pricing | 10% (12.5 this run) | 15 | 30 | Quaderno +15 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 47 | 28 | Anrok +19 |
| Transparency & trust | 7% (8.8 this run) | 54 | 76 | Quaderno +22 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **61.6 · C** | **59.5 · C** | |

## Facts side by side

| Fact | Anrok | Quaderno |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Anrok, Inc. | Recrea Systems, SL |
| Hosted endpoint | `https://api.anrok.com` | `https://quadernoapp.com/api` |
| Transports | HTTP, Streamable HTTP | 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 Quaderno's terms of service. The Ruby library on GitHub is MIT |
| Tools exposed | 31 | none |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-06 | 2026-07-04 |
| Terms last updated | 2026-07-01 | 2026-09-15 |
| Privacy policy last updated | 2026-07-01 | 2024-05-16 |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | yes | yes |
| Terms restrict benchmarking | yes | yes |
| Terms or service can change without notice | not found in the text | yes |
| Arbitration or class-action waiver | not found in the text | not found in the text |
| Popularity | none | 15 stars |

## 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.

**Quaderno.** A public OpenAPI 3.1 spec covers 92 operations, with a free sandbox and a status page showing no incident since July 2025. The API key has full account access, there are no idempotency keys, and the newest public API version is dated October 2024.

## 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

### Quaderno

1. Call GET https://quadernoapp.com/api/authorization first. Its `href` gives the account subdomain that every other call needs
2. Before retrying a failed POST /transactions, list invoices by `processor_id` to check whether the sale was recorded. There is no idempotency key
3. Treat GET /invoices/{id}/deliver as a write. It emails the invoice to the customer
4. Correct a final invoice with a credit note. DELETE on invoices returns 410 and PUT accepts only notes, tags, metadata and address fields
5. Read X-RateLimit-Remaining and X-RateLimit-Reset, and page with `created_before` and `limit` up to 100

## Questions

### Which is better for AI agents, Anrok or Quaderno?

Anrok scores 61.6 (C) on agent readiness against Quaderno's 59.5 (C), and leads in 3 of 7 scored categories. Quaderno leads on schema & documentation, payments & pricing and transparency & trust.

### Do Anrok and Quaderno need an API key?

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

### Can an agent call Anrok and Quaderno without installing anything?

Yes. Anrok has a hosted endpoint at https://api.anrok.com and Quaderno at https://quadernoapp.com/api.


## For agents

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

## Other comparisons with Anrok or Quaderno

- [Anrok vs Avalara AvaTax](https://www.anchorterminal.com/compare/anrok-vs-avalara.md)
- [Anrok vs TaxJar](https://www.anchorterminal.com/compare/anrok-vs-taxjar.md)
- [Anrok vs Vertex O Series](https://www.anchorterminal.com/compare/anrok-vs-vertex-tax.md)
- [Avalara AvaTax vs Quaderno](https://www.anchorterminal.com/compare/avalara-vs-quaderno.md)
- [Quaderno vs TaxJar](https://www.anchorterminal.com/compare/quaderno-vs-taxjar.md)
- [Quaderno vs Vertex O Series](https://www.anchorterminal.com/compare/quaderno-vs-vertex-tax.md)