x402 census · agent402.tools · 5c7ed5f1e24c · JSON

GET /api/drug-ndc

live

Look up the FDA National Drug Code directory (openFDA) by NDC or by brand or generic name: product NDC, labeler, dosage form, routes, active ingredients with strengths, marketing category and application number, pharmacologic class, marketing and listing dates, and the package NDCs with their descriptions. The answer says how many products matched. Live FDA data, no key.

Verdict: live. The unpaid GET reached a valid 402. The live amount equals the catalog price.

Facts from the catalogs

Field Value

URL https://agent402.tools/api/drug-ndc

Method GET

Price $0.004 USDC = 4000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base); also accepts eip155:137, eip155:42161, eip155:143, eip155:43114, eip155:1329, eip155:10, eip155:4663, eip155:42220, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp, stellar:pubnet, algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=

payTo 0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0

Seller agent402.tools

Catalogs cdp (row updated 2026-10-20), payai (row updated 2026-10-20)

Listed since (lower bound) 2026-10-20 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-10-20

CDP quality counters 5 calls and 2 unique payers in 30 days, last call 2026-10-20 (catalog-reported, not verified on chain)

Category (keyword rule) directory/listing

Templated path no

x402Version in catalog 2

Service name / tags FDA NDC directory lookup · data, fda, drug, ndc, national-drug-code

Unpaid probe (census of 2026-10-22)

Field Value

Probed at 2026-10-22T00:26:10.342Z

HEAD 402

GET 402

Verdict live live: valid 402 to an unpaid GET

402 carried in body

x402Version in the 402 2

accepts[0] {"scheme":"exact","network":"eip155:8453","amount":"4000","payTo":"0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","maxTimeoutSeconds":300,"extra":{"name":"USD Coin","version":"2"}}

Live amount equals catalog price yes

Live payTo equals catalog payTo yes

extensions.bazaar in the 402 yes

PAYMENT-REQUIRED header no

WWW-Authenticate offer Payment id="ycpWWtzPpdjtnpsljRHByHaVz51K

Content type / server / CORS application/json / railway-hikari / *

Latency 129 ms

Error Payment required

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 120

Payments 1,253

USDC volume $12.29

Median payment $0.003

First / last payment 2026-06-18 / 2026-09-30

Sampler-shaped share of payments 61.8%

Payers that are not samplers 2

Source forensics-2026-09-30

Address 0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0 (contract: EIP7702StatelessDeleGator)

Declared input and output (extensions.bazaar)

{
 "input": {
  "method": "GET",
  "queryParams": {
   "ndc": "58151-155"
  },
  "type": "http"
 },
 "output": {
  "type": "json",
  "example_truncated": true,
  "chars": 1014
 }
}

Try it (unpaid: shows the 402)

curl -si -X GET 'https://agent402.tools/api/drug-ndc' -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/5c7ed5f1e24c/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"5c7ed5f1e24c"} 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: PayAI listing status · agentic.market (CDP Bazaar front end) · this record as JSON · all resources on agent402.tools.