x402 census · rengi.dev · 5cc498c8d00b · JSON

POST /v1/audio-tools/loop

gone

Audio tools: Turn music or ambience into a seamless loop: cuts at zero crossings and crossfades the end into the start with an equal-power curve. Returns the loop, a 3x preview and loop points in samples. Full schema: https://rengi.dev/v1/audio-tools/schema

Verdict: dead listing. 404/410: gone.

Facts from the catalogs

Field Value

URL https://rengi.dev/v1/audio-tools/loop

Method POST

Price $0.10 USDC = 100000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

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

payTo 0x301D463c666cCb40801e11e78bc6538e671018D7

Seller rengi.dev

Catalogs cdp (row updated 2026-10-21)

Listed since (lower bound) 2026-10-21 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-10-21

CDP quality counters 1 calls and 1 unique payers in 30 days, last call 2026-10-21 (catalog-reported, not verified on chain)

Category (keyword rule) image/video/audio

Templated path no

x402Version in catalog 2

Service name / tags Rengi Forge · audio, seamless-loop, music, ambience, gamedev

Unpaid probe (census of 2026-10-22)

Field

Value

Probed at

2026-10-22T00:25:16.035Z

HEAD

404

GET

404

Verdict

gone 404/410: gone

402 carried in

n/a

x402Version in the 402

n/a

accepts[0]

none

Live amount equals catalog price

not comparable

Live payTo equals catalog payTo

not comparable

extensions.bazaar in the 402

PAYMENT-REQUIRED header

WWW-Authenticate offer

none

Content type / server / CORS

application/json / n/a / none

Latency

482 ms

Error

none

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

Settlement history

unresolved: payTo not seen in the payer forensics (180 wallets' outbound history) or the Blockscout sample

Declared input and output (extensions.bazaar)

{
 "input": {
  "body": {
   "audioUrl": "https://rengi.dev/samples/ambience.wav",
   "crossfadeMs": 250
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
 },
 "output": {
  "type": "json",
  "example": {
   "durationSec": 4.8,
   "file": "https://rengi.dev/files/<id>/loop.ogg",
   "loopEndSample": 211500,
   "loopStartSample": 0,
   "preview": "https://rengi.dev/files/<id>/loop-x3.ogg",
   "sampleRate": 44100,
   "waveform": "https://rengi.dev/files/<id>/waveform.png"
  }
 }
}

Try it (unpaid: shows the 402)

curl -si -X POST 'https://rengi.dev/v1/audio-tools/loop' -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/5cc498c8d00b/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"5cc498c8d00b"} 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 rengi.dev.