Api Endpoint

know.fast

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).

Open interactive test console

Offering

Provider: know.fast
Method: POST
Offering type: Api Endpoint
Transport type: http
Category: Web Search Research
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://know.fast/v1/x402/know
MIME type: Not provided
First seen: 2026-10-16T01:50:10.647Z
Last seen: 2026-11-01T14:58:16.922Z
Tags: knowledge, summarization, web-content, citations, Research

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1: 0.01 USDC
Atomic price: 10000 · Network: eip155:8453 · Asset: USDC · Scheme: exact

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "payTo": "0x45A4A9612D4d4E78703A63dC3eF36267A6c17D96"
  }
]

Observed health

Status: Reachable
Latest latency: 163 ms
Average latency: 497 ms
HTTP status: 401
Last checked: 2026-11-02T19:38:14.012Z
Reachability: 100% over 14 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "additionalProperties": false,
  "properties": {
    "body": {
      "properties": {
        "fresh": {
          "description": "Re-read the URL from scratch because its content changed, instead of answering from the shared knowledge base. Same flat price.",
          "type": "boolean"
        },
        "lang": {
          "description": "Optional language hint for the knowledge packet (e.g. \"en\").",
          "maxLength": 16,
          "type": "string"
        },
        "url": {
          "description": "The link to know — an article, YouTube video, X/Twitter post or thread, podcast episode (Spotify/Apple/Overcast), academic paper, PDF, or GitHub repo.",
          "maxLength": 2000,
          "type": "string"
        }
      },
      "required": [
        "url"
      ],
      "type": "object"
    },
    "bodyType": {
      "enum": [
        "json",
        "form-data",
        "text"
      ],
      "type": "string"
    },
    "method": {
      "enum": [
        "POST"
      ],
      "type": "string"
    },
    "type": {
      "const": "http",
      "type": "string"
    }
  },
  "required": [
    "type",
    "method",
    "bodyType",
    "body"
  ],
  "type": "object"
}

Output schema

{
  "properties": {
    "example": {
      "properties": {
        "cached": {
          "description": "True when the link was already known and answered instantly.",
          "type": "boolean"
        },
        "costUsd": {
          "description": "What this call charged (the flat price).",
          "type": "number"
        },
        "deferred": {
          "description": "True for first-ever media links (transcription runs 2-8 minutes). Poll statusUrl until knowledgeReady, then GET markdownUrl.",
          "type": "boolean"
        },
        "kind": {
          "description": "Content type: article, video, or podcast.",
          "type": "string"
        },
        "knowledgeReady": {
          "description": "True when `packet` is present — answer directly from it, no second fetch.",
          "type": "boolean"
        },
        "markdownUrl": {
          "description": "The knowledge packet as raw markdown.",
          "type": "string"
        },
        "packet": {
          "description": "Token-efficient markdown knowledge packet: title, summary, key claims and facts with citations, plus pointers to full text, graded evidence, and timestamped transcript files.",
          "type": "string"
        },
        "runId": {
          "description": "Durable id of the knowledge page.",
          "type": "string"
        },
        "status": {
          "description": "succeeded for instant answers; running/queued while a first-ever link processes.",
          "type": "string"
        },
        "statusUrl": {
          "description": "Public JSON status endpoint for deferred runs — no auth needed.",
          "type": "string"
        },
        "title": {
          "description": "Resolved title of the content.",
          "type": "string"
        },
        "url": {
          "description": "The link that was known.",
          "type": "string"
        },
        "viewerUrl": {
          "description": "Durable, citable public knowledge page.",
          "type": "string"
        }
      },
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}