# Sales tax and VAT calculation APIs for AI agents (slim)

> 5 tax calculation & compliance listings ranked by the Anchor benchmark. Leader Avalara AvaTax (B). Services that calculate sales tax, VAT and GST for a transaction, record it for reporting and handle registrations, exemptions and filing. Compared on calculation coverage by country and US state, the transaction API, filing and price per call.

- Full: https://www.anchorterminal.com/categories/tax.md (~1,950 tokens) · this version ~380 tokens · JSON https://www.anchorterminal.com/categories/tax.json · canonical https://www.anchorterminal.com/categories/tax
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-08

- Tools: 5 · agent-ready (BB+): 0 · accept x402: 0 · JSON: https://www.anchorterminal.com/api/v1/tools.json · by capability: https://www.anchorterminal.com/api/v1/capabilities.json
- Capabilities: tax.calculate, tax.transactions, tax.filing, tax.exemptions, tax.invoicing

| # | Tool | Grade | Score | Confidence | x402 | Auth | Where | Slim |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 162 | Avalara AvaTax | B | 68.8 | medium | no | OAuth or key | hosted | https://www.anchorterminal.com/tools/avalara.min.md |
| 321 | Anrok | C | 61.6 | medium | no | OAuth or key | hosted | https://www.anchorterminal.com/tools/anrok.min.md |
| 377 | Quaderno | C | 59.5 | medium | no | OAuth or key | hosted | https://www.anchorterminal.com/tools/quaderno.min.md |
| 417 | TaxJar | C | 57.6 | medium | no | API key | hosted | https://www.anchorterminal.com/tools/taxjar.min.md |
| 464 | Vertex O Series | C | 54.7 | medium | no | OAuth | hosted | https://www.anchorterminal.com/tools/vertex-tax.min.md |