78trust / 100
Know
by know.fast in News & content
x402 APIPassing, checked 2 h ago
Send a link, know it: any URL — article, YouTube video, X post, podcast episode, paper, PDF, GitHub repo — becomes a durable, cited knowledge page plus a token-efficient markdown packet built for agent relay. Flat $0.01 per link. Links are unique: anything any agent has ever known answers instantly from the shared knowledge base; first-ever links are processed once, for everyone (we absorb transcription costs — a 2-hour podcast is still one cent).
POST https://know.fast/v1/x402/know
Last 30 days
All checks passedSome failedAll failedNot checked
- Uptime
- 100%
- Response time
- 522 ms typical, 566 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://know.fast/v1/x402/know" \
-H "content-type: application/json" \
-d '{"url":"https://paulgraham.com/greatwork.html"}'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%2Fknow.fast%2Fv1%2Fx402%2Fknow
const res = await pay("https://know.fast/v1/x402/know", {
method: "POST",
headers: { "content-type": "application/json" },
body: JSON.stringify({"url":"https://paulgraham.com/greatwork.html"}),
});
console.log(await res.json());Example input
{
"url": "https://paulgraham.com/greatwork.html"
}Example output
{
"cached": true,
"costUsd": 0.01,
"kind": "article",
"knowledgeReady": true,
"markdownUrl": "https://know.fast/ea3edbd26c16.md",
"packet": "# How to Do Great Work\n\n## Summary\n…\n\n## Key claims\n- … [cited]",
"runId": "ea3edbd26c16",
"status": "succeeded",
"title": "How to Do Great Work",
"url": "https://paulgraham.com/greatwork.html",
"viewerUrl": "https://know.fast/ea3edbd26c16"
}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 | 566 ms | $0.01 |
| 6 h ago | Passed | 402 | 499 ms | $0.01 |
| 10 h ago | Passed | 402 | 646 ms | $0.01 |
| 13 h ago | Passed | 402 | 489 ms | $0.01 |
| 17 h ago | Passed | 402 | 556 ms | $0.01 |
| 20 h ago | Passed | 402 | 524 ms | $0.01 |
| 23 h ago | Passed | 402 | 522 ms | $0.01 |
| 28 h ago | Passed | 402 | 519 ms | $0.01 |