Realised 30-day yields for 13 tokenized treasury funds: BUIDL, BENJI, OUSG, USDY, USTB, US

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xf567Cfe0FDb87A1D6Ca330e3f30f0D3DA0F7cb98",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "30000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "payTo": "0xf567Cfe0FDb87A1D6Ca330e3f30f0D3DA0F7cb98",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "30000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "payTo": "0xf567Cfe0FDb87A1D6Ca330e3f30f0D3DA0F7cb98",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "30000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:50",
    "payTo": "0xedb1a894761F0a142d80D09F82Ff7CF99158Bb19",
    "asset": "0xfA2958CB79b0491CC627c1557F441eF849Ca8eb1",
    "amount": "30000",
    "maxTimeoutSeconds": 120
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "instruments": "USTB,EUTBL,USYC"
        },
        "type": "http"
      },
      "output": {
        "example": {
          "data": [
            {
              "access": "whitelist",
              "annualisation": "simple",
              "currency": "EUR",
              "day_count": "actual/365",
              "deployment_divergence": [],
              "eligibility": {
                "quote": "The shares of the Sub-Fund may not be offered or sold, directly or indirectly, in the United States of America (including its territories and possessions), to a 'US Person'",
                "read_on": "2026-08-31",
                "url": "https://cdn.spiko.finance/legal_docs/EN/Prospectus_Spiko_SICAV_EN.pdf"
              },
              "family": "price_accrual",
              "instrument": "rwa.spiko.eutbl",
              "issuer": "SPIKO SICAV, compartment (management company Twenty First Capital SAS, AMF GP-11000029)",
              "issuer_figure": {
                "as_of_date": "2026-09-04",
                "available": true,
                "definition": null,
                "reproducible_from_published_inputs": null,
                "value_pct": 2.13
              },
              "issuer_vs_basis_bps": -4.3,
              "legal_name": "SPIKO EU T-BILLS MONEY MARKET FUND",
              "period_return_pct": 0.171538,
              "primary_source": {
                "chain_key": "fund",
                "id": "spiko.api.nav.eutbl",
                "quantity": "nav_per_share"
              },
              "ticker": "EUTBL",
              "window": {
                "actual_days": 30,
                "distinct_observations": 18,
                "end_date": "2026-09-03",
                "start_date": "2026-08-04"
              },
              "yield_basis": "measured",
              "yield_pct": 2.087049
            }
          ],
          "meta": {
            "basis": {
              "annualisation": "simple",
              "day_count": "actual/365",
              "name": "Open Treasury Yield Basis",
              "version": "1.1.0",
              "window_days": 30
            },
            "capability": "compass.rwa.yields",
            "schema_version": "0.5.0"
          },
          "ranking": {
            "groups": [
              {
                "currency": "EUR",
                "family": "price_accrual",
                "highest": {
                  "ticker": "EUTBL",
                  "yield_pct": 2.087049
                }
              }
            ]
          }
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "properties": {
                "instruments": {
                  "description": "comma-separated tickers or instrument ids, for example USTB,EUTBL or rwa.spiko.eutbl. Defaults to every tracked instrument. The free coverage endpoint lists them.",
                  "type": "string"
                }
              },
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "type": "object"
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            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

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

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

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