Send a link, know it

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).

Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.

Endpoint

POST https://know.fast/v1/x402/know

Our checks, last 30 days

We never call tools that send, buy, move money or file anything, not even without paying.

Example input (from the provider)

{
  "body": {
    "url": "https://paulgraham.com/greatwork.html"
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
}

Promised output schema (from the provider)

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "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 \u2014 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": {
      "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 \u2014 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 \u2014 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"
    }
  },
  "required": [
    "input"
  ],
  "type": "object"
}

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