x402 census · api.usenami.io · 33a5a2c78cdf · JSON

GET /v1/perp/oi-history

live

Historical open-interest timeseries for one crypto perpetual on one venue, aggregated 1h/4h/1d — positioning over time for backtests and regime studies. 30–90d window cap.

Verdict: live. The unpaid GET reached a valid 402 (confirmed by the re-probe of 2026-10-01).

Facts from the catalogs

Field Value

URL https://api.usenami.io/v1/perp/oi-history

Method GET

Price $0.005 USDC = 5000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base)

payTo 0x1538726707212F4dB3EB67cEc0910422A310475c

Seller api.usenami.io

Catalogs cdp (row updated 2026-09-01)

Listed since (lower bound) 2026-09-01 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-09-01

CDP quality counters 1 calls and 1 unique payers in 30 days, last call 2026-09-01 (catalog-reported, not verified on chain)

Category (keyword rule) crypto-data

Templated path no

x402Version in catalog 2

Service name / tags Usenami · funding, perpetual, trading, multi-venue, market-data

Unpaid probe (census of )

Field

Value

Probe

not probed in this build

Latest re-probe

Field Value

Re-probed at 2026-10-01T06:13:18.000Z (cron)

Verdict now live changed from unprobed

HEAD / GET 405 / 402

accepts[0] {"scheme":"exact","network":"base","amount":"5000","payTo":"0x1538726707212F4dB3EB67cEc0910422A310475c","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","maxTimeoutSeconds":300,"extra":{"name":"USD Coin","version":"2"}}

Live amount equals catalog price yes

Latency 1,245 ms

Error none

On-chain facts for the payTo (public address)

Field Value

Distinct payers 8

Payments 29

USDC volume $0.07

Median payment $0.002

First / last payment 2026-07-13 / 2026-09-29

Sampler-shaped share of payments 100.0%

Payers that are not samplers 0

Source forensics-2026-09-30

Address 0x1538726707212F4dB3EB67cEc0910422A310475c

Declared input and output (extensions.bazaar)

{
 "input": {
  "method": "GET",
  "queryParams": {
   "aggr": {
    "description": "Default 1h.",
    "enum": [
     "1h",
     "4h",
     "1d"
    ],
    "required": false,
    "type": "string"
   },
   "from": {
    "description": "Default: 7 days ago.",
    "format": "date-time",
    "required": false,
    "type": "string"
   },
   "ticker": {
    "description": "Base ticker. Required.",
    "required": true,
    "type": "string"
   },
   "to": {
    "description": "Default: now.",
    "format": "date-time",
    "required": false,
    "type": "string"
   },
   "venue": {
    "description": "Venue name. Required.",
    "required": true,
    "type": "string"
   }
  },
  "type": "http"
 },
 "output": {
  "type": "json",
  "example": {
   "aggregation": "1h",
   "buckets": [
    {
     "bucket_start": "2026-05-24T00:00:00Z",
     "samples": 1,
     "value": 95012.5,
     "venue": "binance"
    }
   ],
   "ticker": "BTC",
   "venue": "binance",
   "window_end": "2026-05-31T00:00:00Z",
   "window_start": "2026-05-24T00:00:00Z"
  }
 }
}

Try it (unpaid: shows the 402)

curl -si -X GET 'https://api.usenami.io/v1/perp/oi-history' -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/33a5a2c78cdf/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"33a5a2c78cdf"} 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 api.usenami.io.