Market Data · x402 · early usage

Realised 30-day yields for 13 tokenized treasury funds under the Open Treasury Yield Basis

by api.402rates.com · discovered, not yet claimed by its owner · updated 2026-10-08

30d calls2

30d payers2

MethodGET

Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

Realised 30-day yields for 13 tokenized treasury funds under the Open Treasury Yield Basis. Measured rows use NAV, price or verified passive-holder balances, with observations, sources and dates. Issuer figures and differences appear where available. Quoted and unavailable rows stay explicit; free coverage lists funds and gaps. Business/professional use only. Terms: https://402rates.com/data-terms/

Tags: rwa · tokenized-treasuries · yield · nav · money-market · bazaar

Call contract

Method: GET
Input: query parameters
Output: json
Last paid call: 2026-10-08

Input example from Bazaar metadata

{
  "instruments": "USTB,EUTBL,USYC"
}

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
        }
      }
    ]
  }
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/25912.json for the price and payment options.
Pay. Call GET https://api.402rates.com/v1/rwa/yields. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, Polygon, Arbitrum One, eip155:50, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.03 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base, Polygon, Arbitrum One, eip155:50
Demand: 2 calls · 2 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.03	0xf567Cfe0FDb87A1D6Ca330e3f30f0D3DA0F7cb98	300s
exact	Polygon eip155:137	USDC	$0.03	0xf567Cfe0FDb87A1D6Ca330e3f30f0D3DA0F7cb98	300s
exact	Arbitrum One eip155:42161	USDC	$0.03	0xf567Cfe0FDb87A1D6Ca330e3f30f0D3DA0F7cb98	300s
exact	eip155:50 eip155:50	0xfA2958CB79b0491CC627c1557F441eF849Ca8eb1	30000	0xedb1a894761F0a142d80D09F82Ff7CF99158Bb19	120s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xf567Cfe0FDb87A1D6Ca330e3f30f0D3DA0F7cb98",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "30000",
    "amountUsd": 0.03,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "payTo": "0xf567Cfe0FDb87A1D6Ca330e3f30f0D3DA0F7cb98",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "30000",
    "amountUsd": 0.03,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "payTo": "0xf567Cfe0FDb87A1D6Ca330e3f30f0D3DA0F7cb98",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "30000",
    "amountUsd": 0.03,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:50",
    "payTo": "0xedb1a894761F0a142d80D09F82Ff7CF99158Bb19",
    "asset": "0xfA2958CB79b0491CC627c1557F441eF849Ca8eb1",
    "amount": "30000",
    "maxTimeoutSeconds": 120
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

Example shape — generated from the schema, not a captured live response

{
  "example": {},
  "type": "string"
}

Examples

curl

curl -X GET 'https://api.402rates.com/v1/rwa/yields'
# -> 402 Payment Required; read PAYMENT-REQUIRED
# retry the identical request with PAYMENT-SIGNATURE

JavaScript

const res = await fetch("https://api.402rates.com/v1/rwa/yields", {
  "method": "GET"
});
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.request("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

Details

Provider: api.402rates.com
Endpoint: https://api.402rates.com/v1/rwa/yields
Machine-readable: /resources/25912.json