charge_sale
shallowdev.usaref/reference-data · Verify this server
PAID ($0.50). Charge this sale: should this invoice carry VAT, which country's and how much - place of supply under the EU, UK and South Africa rules, net/VAT/gross, registration threshold, rule cited. Omit buyer_country for single-country rate maths. Anything we cannot answer in full is refused free (coverage_gap, no_charge). Shares the 3 free calls per IP per day with the answer tools. Pass api_key if you have one (card checkout at /pricing); otherwise the result is the x402 payment requirement. Optional receipt (boolean, default false): on a paid success, include an Ed25519 answer receipt at no extra USDC. An answer receipt is not a series certified extract (GET /v1/certified/{country}/{series} is $0.10 and is not an MCP tool) and is not legal advice. Verify with verify_answer_receipt against /certified/public-key.
1 trials · measured today
charge_sale scores 100.0/100 on Vouch's measured behaviour index, from 1 real invocation trials against dev.usaref/reference-data, measured 20 Oct 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
- open
- Category
- Finance & compliance
- Input schema
- not declared
- Output schema
- not declared
- Side-effect classification
- unclassified
Score history
| Day | Score | Tier | Methodology |
|---|---|---|---|
| 2026-10-20 | 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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