Agent Exchange x402 census and directory

x402 census · api.biotechcatalystsentinel.com · dc6da57571b2 · JSON

GET /v1/catalysts/upcoming

unprobed

Upcoming FDA drug-approval (PDUFA) decision dates for US-listed biotechs — a forward catalyst calendar from primary SEC 8-K/6-K filings, every date grounded in a verbatim filing quote, cited to its EDGAR accession and later scored against the actual FDA decision. Use when you need the next 1-365 days of binary FDA events, whole feed or one ticker. Verify accuracy AND coverage free at GET /v1/accu…

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

FieldValue
URLhttps://api.biotechcatalystsentinel.com/v1/catalysts/upcoming
MethodGET
Price$0.02 USDC = 20000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Networkeip155:8453 (base); also accepts solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp
payTo0xcD8975137D48ED9bfD1C299a62c01420B860070d
Sellerapi.biotechcatalystsentinel.com
Catalogscdp (row updated 2026-09-30)
Listed since (lower bound)2026-09-30 (earliest catalog timestamp; catalogs report last-update times only)
Last catalog update2026-09-30
CDP quality counters21 calls and 8 unique payers in 30 days, last call 2026-09-30 (catalog-reported, not verified on chain)
Category (keyword rule)crypto-data
Templated pathno
x402Version in catalog2
Service name / tagsnone

Unpaid probe (census of )

FieldValue
Probenot 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)

FieldValue
Distinct payers7
Payments8
USDC volume$0.22
Median payment$0.02
First / last payment2026-07-26 / 2026-09-29
Sampler-shaped share of payments100.0%
Payers that are not samplers0
Sourceforensics-2026-09-30
Address0xcD8975137D48ED9bfD1C299a62c01420B860070d

Declared input and output (extensions.bazaar)

{
 "input": {
  "method": "GET",
  "queryParams": {
   "limit": 200,
   "within_days": 365
  },
  "type": "http"
 },
 "output": {
  "type": "json",
  "example_truncated": true,
  "chars": 857
 }
}

Try it (unpaid: shows the 402)

curl -si -X GET 'https://api.biotechcatalystsentinel.com/v1/catalysts/upcoming' -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/dc6da57571b2/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"dc6da57571b2"} 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 api.biotechcatalystsentinel.com.