x402 census · 2s.io · f3a0368da60e · JSON

GET /api/crypto/address-validate

live

Validate a cryptocurrency address with full checksum verification (not just regex). Returns {chain, address, valid, canonical, format, reason}. Chains: btc (P2PKH, P2SH, Bech32 SegWit v0, Taproot Bech32m), eth (full EIP-55 checksum; non-checksummed flagged), sol (Ed25519 32-byte Base58), ltc (Base58Check L.../M.../3... + ltc1 Bech32), trx (T-prefix Base58Check 0x41), xrp (r-prefix custom Base58),…

Verdict: live. The unpaid GET reached a valid 402 (confirmed by the re-probe of 2026-10-26). The live amount equals the catalog price.

Facts from the catalogs

Field Value

URL https://2s.io/api/crypto/address-validate

Method GET

Price $0.0025 USDC = 2500 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base); also accepts solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp

payTo 0x2b6D4988Db4723E6908Db86Ab2b8dFBc51FC32C5

Seller 2s.io

Catalogs cdp (row updated 2026-10-11)

Listed since (lower bound) 2026-10-11 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-10-11

CDP quality counters 4 calls and 3 unique payers in 30 days, last call 2026-10-11 (catalog-reported, not verified on chain)

Category (keyword rule) crypto-data

Templated path no

x402Version in catalog 2

Service name / tags 2s · public-records, identifiers, ai-agents, us-gov-data, x402

Unpaid probe (census of 2026-10-22)

Field Value

Probed at 2026-10-22T00:18:03.851Z

HEAD 402

GET 402

Verdict live live: valid 402 to an unpaid GET

402 carried in header+body

x402Version in the 402 2

accepts[0] {"scheme":"exact","network":"eip155:8453","amount":"2500","payTo":"0x2b6D4988Db4723E6908Db86Ab2b8dFBc51FC32C5","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","maxTimeoutSeconds":60,"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 yes

WWW-Authenticate offer none

Content type / server / CORS application/json / Vercel / *

Latency 232 ms

Error PAYMENT-SIGNATURE required

Latest re-probe

Field Value

Re-probed at 2026-10-26T06:13:13.472Z (cron)

Verdict now live unchanged

HEAD / GET 402 / 402

Live amount equals catalog price yes

Latency 1,280 ms

Error none

On-chain facts for the payTo (public address)

Field Value

Distinct payers 118

Payments 833

USDC volume $6.21

Median payment $0.0012

First / last payment 2026-06-12 / 2026-09-30

Sampler-shaped share of payments 100.0%

Payers that are not samplers 0

Source forensics-2026-09-30

Address 0x2b6D4988Db4723E6908Db86Ab2b8dFBc51FC32C5

Declared input and output (extensions.bazaar)

{
 "input": {
  "method": "GET",
  "queryParams": {
   "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
   "chain": "eth"
  },
  "type": "http"
 }
}

Try it (unpaid: shows the 402)

curl -si -X GET 'https://2s.io/api/crypto/address-validate' -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/f3a0368da60e/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"f3a0368da60e"} 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 2s.io.