x402 census · rubric-protocol.com · 0d61dd40fe1a · JSON

GET /v1/x402/hedera-facts/exchange-rate

live

Attested Hedera network facts: HBAR exchange rate, gas fees, supply, node roster, throughput, topic state. Each response carries the ML-DSA-65 attestation ID of the served snapshot — tamper-evident reference data for agents that must prove what they knew when they acted.

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

Facts from the catalogs

Field Value

URL https://rubric-protocol.com/v1/x402/hedera-facts/exchange-rate

Method GET

Price $0.001 USDC = 1000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base); also accepts solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp, algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=

payTo 0xaB6731A0BcDf511c2842C768a03448075aB654ca

Seller rubric-protocol.com

Catalogs cdp (row updated 2026-09-28)

Listed since (lower bound) 2026-09-28 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-09-28

CDP quality counters 34 calls and 26 unique payers in 30 days, last call 2026-09-28 (catalog-reported, not verified on chain)

Category (keyword rule) chain-rpc

Templated path no

x402Version in catalog 2

Service name / tags Rubric Protocol · hedera, oracle, data

Unpaid probe (census of 2026-09-30)

Field Value

Probed at 2026-09-30T23:11:55.543Z

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":"1000","payTo":"0xaB6731A0BcDf511c2842C768a03448075aB654ca","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","maxTimeoutSeconds":120,"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 / nginx / none

Latency 4,862 ms

Error PAYMENT-SIGNATURE header is 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 13

Payments 40

USDC volume $0.24

Median payment $0.001

First / last payment 2026-08-24 / 2026-09-30

Sampler-shaped share of payments 90.0%

Payers that are not samplers 2

Source forensics-2026-09-30

Address 0xaB6731A0BcDf511c2842C768a03448075aB654ca

Declared input and output (extensions.bazaar)

{
 "input": {
  "method": "GET",
  "pathParams": {
   "fact": "path segment (required) - one of exchange-rate|gas-fees|supply|nodes|latest-tx|throughput|staking|usdc-supply|hcs-activity|treasury-balance|anchor-cost|rubric-activity|topic-state"
  },
  "type": "http"
 },
 "output": {
  "type": "json",
  "example_truncated": true,
  "chars": 479
 }
}

Try it (unpaid: shows the 402)

curl -si -X GET 'https://rubric-protocol.com/v1/x402/hedera-facts/exchange-rate' -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/0d61dd40fe1a/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"0d61dd40fe1a"} 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 rubric-protocol.com.