x402 census · dev-5090-box.tailfb4c1f.ts.net · 111b2b4dc975 · JSON

POST /v1/attest/model

live

Proof-of-Model: detect silent model substitution at any OpenAI-compatible inference endpoint. mode=fingerprint records what a seller serves today; mode=verify re-probes later and proves whether the weights changed. Deterministic, evidence included, no model used to judge.

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

Facts from the catalogs

Field Value

URL https://dev-5090-box.tailfb4c1f.ts.net/v1/attest/model

Method POST

Price $0.10 USDC = 100000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base)

payTo 0x07f3f36408a7632bc377b2b0bf181868940395e3

Seller dev-5090-box.tailfb4c1f.ts.net

Catalogs cdp (row updated 2026-10-12)

Listed since (lower bound) 2026-10-12 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-10-12

CDP quality counters 2 calls and 1 unique payers in 30 days, last call 2026-10-12 (catalog-reported, not verified on chain)

Category (keyword rule) inference/llm

Templated path no

x402Version in catalog 2

Service name / tags dev-5090 uncensored inference · audit.model-substitution

Unpaid probe (census of 2026-10-22)

Field Value

Probed at 2026-10-22T00:27:17.943Z

HEAD 402

GET 402

Verdict live live: valid 402 to an unpaid GET

402 carried in header

x402Version in the 402 2

accepts[0] {"scheme":"exact","network":"eip155:8453","amount":"100000","payTo":"0x07f3f36408a7632bc377b2b0bf181868940395e3","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 yes

WWW-Authenticate offer none

Content type / server / CORS application/json / n/a / none

Latency 403 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 1

Payments 1

USDC volume $0.005

Median payment $0.005

First / last payment 2026-09-14 / 2026-09-14

Sampler-shaped share of payments 100.0%

Payers that are not samplers 0

Source forensics-2026-09-30

Address 0x07f3f36408a7632bc377b2b0bf181868940395e3 (contract: EIP7702Proxy)

Declared input and output (extensions.bazaar)

{
 "input": {
  "body": {
   "messages": [
    {
     "content": "...",
     "role": "user"
    }
   ]
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
 },
 "output": {
  "type": "json",
  "example": {
   "choices": [
    {
     "message": {
      "content": "<model output>",
      "role": "assistant"
     }
    }
   ],
   "usage": {
    "total_tokens": 42
   }
  }
 }
}

Try it (unpaid: shows the 402)

curl -si -X POST 'https://dev-5090-box.tailfb4c1f.ts.net/v1/attest/model' -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/111b2b4dc975/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"111b2b4dc975"} 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 dev-5090-box.tailfb4c1f.ts.net.