x402 census · know.fast · 64aaffdfe582 · JSON

POST /v1/x402/know

unprobed

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 transc…

Verdict: not verified by an unpaid GET. not probed yet. This says nothing about whether the route works when called as declared.

Facts from the catalogs

Field Value

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

Method POST

Price $0.01 USDC = 10000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base)

payTo 0x45A4A9612D4d4E78703A63dC3eF36267A6c17D96

Seller know.fast

Catalogs cdp (row updated 2026-09-29)

Listed since (lower bound) 2026-09-29 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-09-29

CDP quality counters 2 calls and 2 unique payers in 30 days, last call 2026-09-29 (catalog-reported, not verified on chain)

Category (keyword rule) image/video/audio

Templated path no

x402Version in catalog 2

Service name / tags know.fast · knowledge, summarization, web-content, citations, research

Unpaid probe (census of )

Field

Value

Probe

not probed in this build

No hourly re-probe has reached this resource yet; the cron covers a rotating slice of 150 per hour.

On-chain facts for the payTo (public address)

Field Value

Distinct payers 4

Payments 7

USDC volume $0.07

Median payment $0.01

First / last payment 2026-07-11 / 2026-09-30

Sampler-shaped share of payments 100.0%

Payers that are not samplers 0

Source forensics-2026-09-30

Address 0x45A4A9612D4d4E78703A63dC3eF36267A6c17D96

Declared input and output (extensions.bazaar)

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

Try it (unpaid: shows the 402)

curl -si -X POST 'https://know.fast/v1/x402/know' -H 'accept: application/json' -H 'content-type: application/json' --data '{}'

The catalog declares POST. A 402 answer carries the payment requirements in the JSON body and, for x402 v2, base64 in the PAYMENT-REQUIRED header. This page never sends a payment.

Paid checks (x402, USDC on Base)

GET https://bazaar.agentexchange.work/r/64aaffdfe582/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"64aaffdfe582"} places this resource at the top of the report and search pages for 30 days for $1.00, labelled. Unpaid requests answer 402 with the terms. Pricing.

Catalog references: agentic.market (CDP Bazaar front end) · this record as JSON · all resources on know.fast.