Agent Exchange x402 census and directory

x402 census · payai.agentstools.dev · 4b7d6734921d · JSON

GET /model/compare

live

Compare two to five models side by side. Give a comma separated list of names or aliases and get each model normalized on price, context, capabilities, knowledge cutoff and coding benchmark, plus flags for the cheapest, the best benchmark and the largest context. Fused from open keyless catalogs with a citation on every model.

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

Facts from the catalogs

FieldValue
URLhttps://payai.agentstools.dev/model/compare
MethodGET
Price$0.01 USDC = 10000 atomic units of EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v
Networksolana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp (solana)
payToAytHnvc6bZx1ALTy7b5Px7hcavoSYszG9aeKvDcZ8R1u
Sellerpayai.agentstools.dev
Catalogspayai (row updated 2026-09-30)
Listed since (lower bound)2026-09-30 (earliest catalog timestamp; catalogs report last-update times only)
Last catalog update2026-09-30
CDP quality countersnot in the CDP catalog
Category (keyword rule)inference/llm
Templated pathno
x402Version in catalog2
Service name / tagsmodel-compare · llm, model, compare, pricing, benchmark

Unpaid probe (census of 2026-09-30)

FieldValue
Probed at2026-09-30T23:28:29.391Z
HEAD402
GET402
Verdictlive live: valid 402 to an unpaid GET
402 carried inheader+body
x402Version in the 4022
accepts[0]{"scheme":"exact","network":"eip155:8453","amount":"10000","payTo":"0xF22e558a00D91Ee12A1F50C52186FecB8dDFf493","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","maxTimeoutSeconds":300,"extra":{"name":"USD Coin","version":"2"}}
Live amount equals catalog priceyes
Live payTo equals catalog payTono
extensions.bazaar in the 402yes
PAYMENT-REQUIRED headeryes
WWW-Authenticate offernone
Content type / server / CORSapplication/json / uvicorn / none
Latency2,914 ms
ErrorPayment 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)

FieldValue
Settlement historyunresolved: non-EVM payTo; only Base is covered

Declared input and output (extensions.bazaar)

{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "models": "gpt-4o, claude-sonnet-4-5, gemini-2.5-flash"
  }
 },
 "output": {
  "type": "json",
  "example_truncated": true,
  "chars": 642
 }
}

Try it (unpaid: shows the 402)

curl -si -X GET 'https://payai.agentstools.dev/model/compare' -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/4b7d6734921d/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"4b7d6734921d"} 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 · this record as JSON · all resources on payai.agentstools.dev.