75trust / 100

Regression

by Linear regression in Productivity & SaaS

x402 APIPassing, checked 3 h ago

Ordinary-least-squares linear regression of y on x: slope, intercept, correlation r and coefficient of determination r². Pass predictAt to also evaluate the fitted line at a given x. Rejected as a clean 400 if lengths differ or x has zero variance.

POST https://stats.openverbs.com/v1/regression

Last 30 days

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Uptime
100%
Response time
551 ms typical, 602 ms slowest 5%
Last check
3 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/regression" \
  -H "content-type: application/json" \
  -d '{"predictAt":4,"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%2Fregression
const res = await pay("https://stats.openverbs.com/v1/regression", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"predictAt":4,"x":[1,2,3],"y":[2,4,6]}),
});
console.log(await res.json());

Example input

{
  "predictAt": 4,
  "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.

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