x402 census · matrix.openverbs.com · 58852ee7e5d5 · JSON

POST /v1/transpose

live

Transpose a matrix, swapping rows and columns. A ragged/empty matrix is a clean 400.

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://matrix.openverbs.com/v1/transpose

Method POST

Price $0.004 USDC = 4000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base)

payTo 0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A

Seller matrix.openverbs.com

Catalogs cdp (row updated 2026-09-06)

Listed since (lower bound) 2026-09-06 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-09-06

CDP quality counters 4 calls and 1 unique payers in 30 days, last call 2026-09-06 (catalog-reported, not verified on chain)

Category (keyword rule) money-movement

Templated path no

x402Version in catalog 2

Service name / tags Transpose a matrix · transpose matrix, swap matrix rows columns, matrix transpose api, flip matrix axes, convert rows to columns

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":"4000","payTo":"0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","maxTimeoutSeconds":300,"extra":{"name":"USD Coin","version":"2"}}

Live amount equals catalog price yes

Latency 1,766 ms

Error none

On-chain facts for the payTo (public address)

Field Value

Distinct payers 5

Payments 197

USDC volume $1.35

Median payment $0.01

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

Sampler-shaped share of payments 100.0%

Payers that are not samplers 0

Source forensics-2026-09-30

Address 0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A

Declared input and output (extensions.bazaar)

{
 "input": {
  "body": {
   "matrix": [
    [
     1
    ]
   ]
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
 }
}

Try it (unpaid: shows the 402)

curl -si -X POST 'https://matrix.openverbs.com/v1/transpose' -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/58852ee7e5d5/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"58852ee7e5d5"} 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 matrix.openverbs.com.