calculate_car_tax
shallowio.github.Screed369/autoza-uk · Verify this server
Calculate annual UK vehicle tax (VED / road tax) for any car. Handles all three UK systems: cars registered before March 2001 (taxed on engine size), March 2001 to March 2017 (CO2 bands, £20–£790), and April 2017 onward (flat standard rate). Also works out the Expensive Car Supplement: over £40,000 list price when new for petrol, diesel and alternative fuel; over £50,000 for a zero-emission car first registered on or after 1 April 2025; and no supplement at all for a zero-emission car first registered before 1 April 2025, whatever it listed for. Pass registration_date as well as registration_year when you have it — the boundaries are dates, and the year alone cannot separate a March 2025 registration from an April one. Use this for any question about UK car tax, road tax, VED, or how much it costs to tax a specific car.
1 trials · measured 27 days ago
calculate_car_tax scores 100.0/100 on Vouch's measured behaviour index, from 1 real invocation trials against io.github.Screed369/autoza-uk, measured 11 Sept 2026 under methodology v0.2.0. Every measured component scored 100.
Component breakdown
| Component | Weight | Value |
|---|---|---|
| Reliability | 35% | not applicable |
| Schema integrity | 25% | 100.0 |
| Failure behaviour | 15% | not applicable |
| Latency | 15% | not applicable |
| Concurrency | 10% | not applicable |
Tool details
- Transport
- remote
- Credential class
- unreachable
- Input schema
- not declared
- Output schema
- not declared
- Side-effect classification
- unclassified
Score history
| Day | Score | Tier | Methodology |
|---|---|---|---|
| 2026-09-11 | 100.0 | shallow | v0.2.0 |
Probe evidence
| Probe | Outcomes |
|---|---|
| schema_integrity | pass: 1 |
Raw request/response logs are not archived yet — the outcome counts above are drawn directly from every recorded trial.
Embed this score
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