77trust / 100
Correlation
by Pearson correlation in Productivity & SaaS
x402 APIPassing, checked 2 h ago
Pearson correlation coefficient and covariance of two equal-length paired series. Rejected as a clean 400 if the lengths differ or either series has zero variance (correlation undefined).
POST https://stats.openverbs.com/v1/correlation
Last 30 days
All checks passedSome failedAll failedNot checked
- Uptime
- 100%
- Response time
- 558 ms typical, 574 ms slowest 5%
- Last check
- 2 h ago
- Next check
- any minute now
How to call it
# See the payment challenge (nothing is charged)
curl -i -X POST "https://stats.openverbs.com/v1/correlation" \
-H "content-type: application/json" \
-d '{"x":[1,2,3],"y":[2,4,6]}'import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";
const client = new x402Client().register(
"eip155:8453",
new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);
// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fstats.openverbs.com%2Fv1%2Fcorrelation
const res = await pay("https://stats.openverbs.com/v1/correlation", {
method: "POST",
headers: { "content-type": "application/json" },
body: JSON.stringify({"x":[1,2,3],"y":[2,4,6]}),
});
console.log(await res.json());Example input
{
"x": [
1,
2,
3
],
"y": [
2,
4,
6
]
}Security scan
- No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.
Recent checks
| When | Result | HTTP | Time | Price |
|---|---|---|---|---|
| 2 h ago | Passed | 402 | 558 ms | $0.004 |
| 5 h ago | Passed | 402 | 592 ms | $0.004 |
| 10 h ago | Passed | 402 | 552 ms | $0.004 |
| 13 h ago | Passed | 402 | 573 ms | $0.004 |
| 17 h ago | Passed | 402 | 548 ms | $0.004 |
| 20 h ago | Passed | 402 | 529 ms | $0.004 |
| 23 h ago | Passed | 402 | 572 ms | $0.004 |
| 29 h ago | Passed | 402 | 574 ms | $0.004 |