x402 census · crypto.openverbs.com · 51a61fd5f44b · JSON
POST /v1/derivatives
unprobed
Crypto perpetual-futures data from on-chain perp DEXs: per market the funding rate (hourly + annualized %), open interest (USD and base units), mark & oracle price, 24h volume and 24h price change. Ranked by open interest; filter by `coins` or `limit`. Data source: Hyperliquid (dYdX fallback).
Verdict: not verified by an unpaid GET. not probed yet. This says nothing about whether the route works when called as declared.
Facts from the catalogs
| Field | Value |
|---|---|
| URL | https://crypto.openverbs.com/v1/derivatives |
| Method | POST |
| Price | $0.002 USDC = 2000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base) |
| payTo | 0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A |
| Seller | crypto.openverbs.com |
| Catalogs | cdp (row updated 2026-09-19) |
| Listed since (lower bound) | 2026-09-19 (earliest catalog timestamp; catalogs report last-update times only) |
| Last catalog update | 2026-09-19 |
| CDP quality counters | 3 calls and 1 unique payers in 30 days, last call 2026-09-19 (catalog-reported, not verified on chain) |
| Category (keyword rule) | crypto-data |
| Templated path | no |
| x402Version in catalog | 2 |
| Service name / tags | · crypto, derivatives, perpetuals, funding-rate, open-interest |
Unpaid probe (census of )
| Field | Value |
|---|---|
| Probe | not probed in this build |
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 | 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": {
"coins": [
"example"
],
"limit": 1
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"type": "json",
"example": {
"attribution": "Data source: Hyperliquid (https://hyperliquid.xyz)",
"count": 30,
"markets": [
{
"coin": "BTC",
"fundingRateAnnualizedPct": 10.95,
"fundingRateHourly": 0.0000125,
"markPrice": 81461,
"openInterest": 43296.48,
"openInterestUsd": 3527000000,
"oraclePrice": 81411,
"premium": 0.0007,
"priceChange24hPct": 3.98,
"volume24hUsd": 3395082692.31
}
],
"source": "hyperliquid",
"stale": false
}
}
}
Try it (unpaid: shows the 402)
curl -si -X POST 'https://crypto.openverbs.com/v1/derivatives' -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/51a61fd5f44b/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"51a61fd5f44b"} 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 crypto.openverbs.com.