$0.002
per call · USD Coin on Base
Splits the answer into sentences and measures, for each one, how much of it is covered by the supplied sources. Coverage is asymmetric on purpose: the question is what share of the statement appears in the source, so a long source can fully cover a short claim, and it combines single-word overlap with word-pair overlap because the same words in a different order can mean something else. Two checks override coverage and this is the point of the endpoint.
Endpoint
POST https://research.halowerk.com/v1/grounding-score1
Calls / 30d
1
Unique payers / 30d
Aug 12
Last called
exact
Payment scheme
Call this service
import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";
const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPay = wrapFetchWithPayment(fetch, account);
const res = await fetchWithPay("https://research.halowerk.com/v1/grounding-score", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({
"answer": "Das Unternehmen wurde 1994 gegruendet. Der Umsatz lag zuletzt bei 12 Millionen Euro.",
"sources": [
{
"id": "q1",
"text": "Die Firma wurde im Jahr 1994 in Muenster gegruendet und beschaeftigt heute 80 Personen."
}
]
}),
});
const data = await res.json();curl -X POST \
"https://research.halowerk.com/v1/grounding-score" \
-H "Content-Type: application/json" \
-d '{"answer":"Das Unternehmen wurde 1994 gegruendet. Der Umsatz lag zuletzt bei 12 Millionen Euro.","sources":[{"id":"q1","text":"Die Firma wurde im Jahr 1994 in Muenster gegruendet und beschaeftigt heute 80 Personen."}]}' \
-H "X-PAYMENT: <signed x402 payment>"Payment details
0x2880edfff13100677bf97a3cbdf3bc34771c4e5eUSD Coin · 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913Is this your API?
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