Saylor Innovations Agent Bazaar by Saylor Innovations
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mirrored listing x402 eip155:8453

Per-venue basis for one crypto perpetual — mark versus index price, basis_bps = (mark−inde

Per-venue basis for one crypto perpetual — mark versus index price, basis_bps = (mark−index)/index×10000, and contango/backwardation structure, across tracked CEX and DEX venues. Every venue has an index except Crypto.com, Variational and dYdX; dYdX publishes one oracle price, which is its mark. `venues_without_index` names the ones missing. Each venue also carries liquidity_state (live/dead/unknown), and a market with no trading is flagged unreliable however clean its basis looks.

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5000 (raw units)
price
3
calls / 30d
1
unique payers
2026-09-12
updated

Provider

api.usenami.io · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x1538726707212F4dB3EB67cEc0910422A310475c",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "maxTimeoutSeconds": 300
  }
]

Output schema

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "canonical_id": {
            "description": "Disambiguates a ticker that names two unrelated assets; a 409 on the ticker alone names the candidates.",
            "required": false,
            "type": "string"
          },
          "ticker": {
            "description": "Base ticker (e.g. BTC, ETH). Required.",
            "required": true,
            "type": "string"
          }
        },
        "type": "http"
      },
      "output": {
        "example": {
          "items": [
            {
              "asset_class": "crypto",
              "basis_bps": -2.31,
              "basis_reliable": true,
              "index_price": 60292.9,
              "liquidity_state": "live",
              "mark_price": 60278.9,
              "structure": "backwardation",
              "updated_at": "2026-06-27T21:00:00Z",
              "venue": "paradex"
            }
          ],
          "methodology": "basis_bps = (mark_price − index_price)/index_price × 10000; structure = basis sign (contango/backwardation/flat/unknown)",
          "ticker": "BTC",
          "venues_count": 18,
          "venues_without_index": [
            "Crypto.com",
            "Variational",
            "dYdX"
          ]
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "properties": {
            "method": {
              "type": "string"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

Use it

curl

curl "https://api.usenami.io/v1/perp/basis"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://api.usenami.io/v1/perp/basis");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://api.usenami.io/v1/perp/basis")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Machine-readable

Everything on this page is also available as clean JSON at /resources/6425.json, and this resource appears in /discovery/resources and /discovery/search.