kette.halowerk.com/tx/simulate
As of 2026-08-15, kette.halowerk.com/tx/simulate on Base held a flawless 100.0% uptime across 166 reliability checks since first seen 2026-08-09 (6 days). Responses came back moderate at 191 ms average from a single EU vantage point (so this includes network distance to the endpoint) and it has held its advertised price steady at $0.0120. Its x402-trust grade is B (score 74.7 from a solid sample, tracked for 6 days), so it currently looks safe to use.
Answers the question that stands before every signature: what really happens to my assets and my rights. The call is executed against the state of a named block on a simulation interface, never on the chain — this hub holds no private key and broadcasts nothing. Balance changes are not inferred from events but measured: the same simulation reads every touched balance immediately before and immediately after the call, native currency included, so an outflow that emits no event is still visible. A(Provider-supplied: an unverified claim, not checked by us. The trust grade above is our independent measurement.)
POST /v1/x402-trust or the x402_trust_score MCP tool.Latency is measured from a single EU vantage point; includes network round-trip distance to the endpoint; a geographically distant endpoint reads slower even when its server is fast, so it is only lightly weighted in the score.
10 better-scored (some cheaper) endpoints serving a semantically similar purpose exist.
We don't reveal which ones here. The ranked list (resource URLs, exact scores, prices & similarity, etc...) is one paid call away. Purchase it right here with a browser wallet, no code required:
A wallet payment page opens first; approve the USDC payment and the ranked JSON list loads right in your browser. Agents use the x402_find_alternatives MCP tool or POST /v1/similar directly.
Full observation record ▾
| Trust grade | B (score 74.7) |
| Recommendation | proceed |
| Confidence | 0.87, full-density (every probe in the 30-day window) |
| 30-day uptime | 100.0% |
| Avg latency (EU vantage) | 191 ms |
| Probes (30d) | 166 |
| Advertised price | $0.012 USDC |
| Price stability (30d) | stable |
| Network | eip155:8453 |
| First seen | 2026-08-09 |
| Last probed | 2026-08-14 |
| Status | listed |
| Snapshot computed | 2026-08-14 20:49 UTC |
- ✓Live probe at decision time:
We re-check the endpoint the moment you ask (timestamped) and compute the score from all scores up until this moment, instead of this cached snapshot that may be up to 24h old. - ✓Confidence band, full component breakdown & structured risk flags:
Exactly why the score is what it is, machine-readable. - ✓On-chain settlement proof:
Real USDC volume & distinct-payer count for the payTo wallet: is anyone actually paying it? - ✓90-day raw history:
Every listing/price/payTo change and probe result (viaPOST /v1/x402-history), up to 90 days back. - ✓The ranked better-scored alternatives:
The resource URLs, scores & prices we don't reveal above (viaPOST /v1/similar), if there are better alternatives available. - ✓Change & liveness alerts:
Get notified on payTo/price changes, spec regressions or downtime (viaPOST /v1/watch-endpoint-30d). Connect up to 10 Discord / Slack webhooks or poll regularly with bearer auth. Increases probe-density to every 5 minutes instead of the usual 30 for the watched endpoint.
... Simply give your agents the tools to do all of that for you, with a simple command
npx -y x402-trust-mcpPrefer HTTP? Call POST /v1/x402-trust directly (pay-per-call over x402, from $0.005).