x402 census · tensorfeed.ai · 89beb6723f15 · JSON

GET /api/premium/research/emerging-keywords

live

Top 50 multi-word keyphrases across recent arXiv AI abstracts ranked by recent-vs-baseline lift (last 30 days frequency over prior 90 days, smoothed). Each keyphrase carries 2-5 example arxiv_ids so an agent can drill into the underlying work. The trend-spotter feed for AI research vocabulary.

Verdict: live. The unpaid GET reached a valid 402 (confirmed by the re-probe of 2026-10-01).

Facts from the catalogs

Field Value

URL https://tensorfeed.ai/api/premium/research/emerging-keywords

Method GET

Price $0.02 USDC = 20000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base)

payTo 0x549c82e6bfc54bdae9a2073744cbc2af5d1fc6d1

Seller tensorfeed.ai

Catalogs cdp (row updated 2026-05-25)

Listed since (lower bound) 2026-05-25 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-05-25

CDP quality counters 1 calls and 1 unique payers in 30 days, last call 2026-09-19 (catalog-reported, not verified on chain)

Category (keyword rule) dev-tools/utilities

Templated path no

x402Version in catalog 2

Service name / tags none

Unpaid probe (census of )

Field

Value

Probe

not probed in this build

Latest re-probe

Field Value

Re-probed at 2026-10-01T01:13:18.000Z (cron)

Verdict now live changed from unprobed

HEAD / GET 402 / 402

accepts[0] {"scheme":"exact","network":"eip155:8453","amount":"20000","payTo":"0x549c82e6bfc54bdae9a2073744cbc2af5d1fc6d1","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","maxTimeoutSeconds":60,"extra":{"name":"USD Coin","version":"2"}}

Live amount equals catalog price yes

Latency 3,021 ms

Error none

On-chain facts for the payTo (public address)

Field Value

Distinct payers 43

Payments 66

USDC volume $1.48

Median payment $0.02

First / last payment 2026-05-30 / 2026-09-30

Sampler-shaped share of payments 100.0%

Payers that are not samplers 0

Source forensics-2026-09-30

Address 0x549c82e6bfc54bdae9a2073744cbc2af5d1fc6d1

Declared input and output (extensions.bazaar)

{
 "input": {
  "method": "GET",
  "queryFields": {},
  "queryParams": {},
  "type": "http"
 },
 "output": {
  "type": "json",
  "example": {
   "billing": {
    "credits_charged": 1,
    "credits_remaining": 49
   },
   "capturedAt": "2026-05-23T06:00:00Z",
   "keywords": [
    {
     "baseline_frequency": 6,
     "example_arxiv_ids": [
      "2505.12345",
      "2505.23456",
      "2505.34567"
     ],
     "lift": 7.83,
     "phrase": "test-time compute scaling",
     "rank": 1,
     "recent_frequency": 47
    }
   ],
   "ok": true,
   "window": {
    "baseline_days": 90,
    "recent_days": 30
   }
  }
 }
}

Try it (unpaid: shows the 402)

curl -si -X GET 'https://tensorfeed.ai/api/premium/research/emerging-keywords' -H 'accept: application/json'

The catalog declares GET. 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/89beb6723f15/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"89beb6723f15"} 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 tensorfeed.ai.