Market Data · x402 · early usage

US overnight interest rates — latest SOFR secured financing and EFFR effective federal…

US overnight interest rates — latest SOFR secured financing and EFFR effective federal funds benchmarks, volumes and policy target range for dollar borrowing-cost comparisons. x402Atlas is not affiliated with the New York Fed. The New York Fed does not sancti…

by us-rates.use.x402atlas.com · discovered, not yet claimed by its owner · updated 2026-10-09

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

Tags: interest-rates · sofr · federal-funds · money-markets · overnight-rates · bazaar

Call contract

Method: GET
Input: HTTP request
Output: json
Last paid call: 2026-10-09

No input exampleProvider did not publish one in Bazaar metadata.

Output example

{
  "changes": "x402Atlas selects series, normalizes field names and sorts effective dates; original rate values are unchanged. Omitted optional metadata is null; no interpolation. Original data is freely available from the source and retains the same permissions, conditions and restrictions under its Terms of Use. The fee is for API integration.",
  "disclaimer": "x402Atlas is not affiliated with the New York Fed. The New York Fed does not sanction, endorse, or recommend any products or services offered by x402Atlas.",
  "notice": "The Secured Overnight Financing Rate and Effective Federal Funds Rate data are subject to the Terms of Use posted at newyorkfed.org. The New York Fed is not responsible for publication of these data by x402Atlas, does not endorse any particular republication, and has no liability for your use.",
  "operation": "latest",
  "retrieved_at": "2024-01-08T14:00:00Z",
  "schema_version": "1",
  "series": [
    {
      "alias": "sofr",
      "frequency": "business_daily",
      "name": "Secured Overnight Financing Rate",
      "observations": [
        {
          "date": "2024-01-05",
          "source_footnote_id": null,
          "source_revision_indicator": "",
          "target_lower_percent": null,
          "target_upper_percent": null,
          "value": 5.31,
          "volume_usd_billions": 1674
        }
      ],
      "source_id": "SOFR",
      "unit": "percent_per_annum"
    },
    {
      "alias": "effr",
      "frequency": "business_daily",
      "name": "Effective Federal Funds Rate",
      "observations": [
        {
          "date": "2024-01-05",
          "source_footnote_id": null,
          "source_revision_indicator": "",
          "target_lower_percent": 5.25,
          "target_upper_percent": 5.5,
          "value": 5.33,
          "volume_usd_billions": 84
        }
      ],
      "source_id": "EFFR",
      "unit": "percent_per_annum"
    }
  ],
  "source": "Federal Reserve Bank of New York",
  "source_url": "https://www.newyorkfed.org/markets/reference-rates",
  "terms_url": "https://www.newyorkfed.org/privacy/termsofuse.html",
  "warnings": []
}

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/36542.json for the price and payment options.
Pay. Call GET https://us-rates.use.x402atlas.com/latest. 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, Solana, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.01 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base, Polygon, Arbitrum One, Solana
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	$0.01	0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2	300s
exact	Polygon eip155:137	USDC	$0.01	0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2	300s
exact	Arbitrum One eip155:42161	USDC	$0.01	0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2	300s
exact	Solana solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp	USDC	$0.01	ASt6xvRyQ7ntERsmcYVMdLqZvz1GEN8Fzexzq62tXrNQ	300s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "amountUsd": 0.01,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "10000",
    "amountUsd": 0.01,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "10000",
    "amountUsd": 0.01,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "ASt6xvRyQ7ntERsmcYVMdLqZvz1GEN8Fzexzq62tXrNQ",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "10000",
    "amountUsd": 0.01,
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "additionalProperties": false,
      "properties": {
        "changes": {
          "description": "Transformations applied to source data.",
          "type": "string"
        },
        "disclaimer": {
          "description": "Required non-affiliation and non-endorsement disclaimer.",
          "type": "string"
        },
        "notice": {
          "description": "Reference-rate redistribution notice.",
          "type": "string"
        },
        "operation": {
          "description": "Stable route operation.",
          "enum": [
            "latest"
          ],
          "type": "string"
        },
        "retrieved_at": {
          "description": "UTC source retrieval time, unchanged on cache hits; not data freshness.",
          "format": "date-time",
          "type": "string"
        },
        "schema_version": {
          "description": "Normalized response contract version.",
          "enum": [
            "1"
          ],
          "type": "string"
        },
        "series": {
          "description": "SOFR then EFFR for latest, or the requested historical series.",
          "items": {
            "additionalProperties": false,
            "properties": {
              "alias": {
                "description": "sofr is secured overnight financing; effr is effective federal funds.",
                "enum": [
                  "sofr",
                  "effr"
                ],
                "type": "string"
              },
              "frequency": {
                "description": "Business-day series; holidays and missing publications can create gaps.",
                "enum": [
                  "business_daily"
                ],
                "type": "string"
              },
              "name": {
                "description": "Official reference rate name.",
                "type": "string"
              },
              "observations": {
                "description": "Ascending source dates, without interpolation.",
                "items": {
                  "additionalProperties": false,
                  "properties": {
                    "date": {
                      "description": "Source effective observation date, not publication or retrieval time.",
                      "format": "date",
                      "type": "string"
                    },
                    "source_footnote_id": {
                      "description": "Source footnote identifier; consult the official rate page for text, null if absent.",
                      "maximum": 1000000,
                      "minimum": 0,
                      "type": [
                        "integer",
                        "null"
                      ]
                    },
                    "source_revision_indicator": {
                      "description": "Raw source indicator: Y revised, empty string unmarked, null absent; may change in later publications.",
                      "enum": [
                        "",
                        "Y",
                        null
                      ],
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "target_lower_percent": {
                      "description": "EFFR policy target lower bound in percent, null for SOFR or absent metadata.",
                      "maximum": 100,
                      "minimum": -100,
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "target_upper_percent": {
                      "description": "EFFR policy target upper bound in percent, null for SOFR or absent metadata.",
                      "maximum": 100,
                      "minimum": -100,
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "value": {
                      "description": "Overnight reference rate in percent per annum; 5 means 5%.",
                      "maximum": 100,
                      "minimum": -100,
                      "type": "number"
                    },
                    "volume_usd_billions": {
                      "description": "Underlying transaction volume in billions of US dollars, null if absent.",
                      "maximum": 1000000000,
                      "minimum": 0,
                      "type": [
                        "number",
                        "null"
                      ]
                    }
                  },
                  "required": [
                    "date",
                    "value",
                    "volume_usd_billions",
                    "target_lower_percent",
                    "target_upper_percent",
                    "source_revision_indicator",
                    "source_footnote_id"
                  ],
                  "type": "object"
                },
                "maxItems": 1,
                "minItems": 1,
                "type": "array"
              },
              "source_id": {
                "description": "Original source rate type: SOFR or EFFR.",
                "type": "string"
              },
              "unit": {
                "description": "Annual percentage rate; 5 means five percent, not 0.05.",
                "enum": [
                  "percent_per_annum"
                ],
                "type": "string"
              }
            },
            "required": [
              "alias",
              "source_id",
              "name",
              "frequency",
              "unit",
              "observations"
            ],
            "type": "object"
          },
          "maxItems": 2,
          "minItems": 2,
          "type": "array"
        },
        "source": {
          "description": "Federal Reserve Bank of New York attribution.",
          "type": "string"
        },
        "source_url": {
          "description": "Official freely accessible source website.",
          "format": "uri",
          "type": "string"
        },
        "terms_url": {
          "description": "Source data terms; same permissions, conditions and restrictions apply to redistribution.",
          "format": "uri",
          "type": "string"
        },
        "warnings": {
          "description": "Revision marks, source footnotes or differing latest dates; empty when none apply.",
          "items": {
            "description": "Interpretation warning.",
            "type": "string"
          },
          "maxItems": 3,
          "type": "array"
        }
      },
      "required": [
        "operation",
        "schema_version",
        "source",
        "source_url",
        "terms_url",
        "disclaimer",
        "notice",
        "changes",
        "retrieved_at",
        "series",
        "warnings"
      ],
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

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

{
  "example": {
    "changes": "string",
    "disclaimer": "string",
    "notice": "string",
    "operation": "latest",
    "retrieved_at": "2026-01-01T00:00:00Z",
    "schema_version": "1",
    "series": [
      {
        "alias": "sofr",
        "frequency": "business_daily",
        "name": "string",
        "observations": [
          {
            "date": "string",
            "source_footnote_id": 0,
            "source_revision_indicator": "",
            "target_lower_percent": 0,
            "target_upper_percent": 0,
            "value": 0,
            "volume_usd_billions": 0
          }
        ],
        "source_id": "string",
        "unit": "percent_per_annum"
      }
    ],
    "source": "string",
    "source_url": "https://example.com",
    "terms_url": "https://example.com",
    "warnings": [
      "string"
    ]
  },
  "type": "string"
}

Examples

curl

curl "https://us-rates.use.x402atlas.com/latest"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://us-rates.use.x402atlas.com/latest");
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://us-rates.use.x402atlas.com/latest")
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: us-rates.use.x402atlas.com
Endpoint: https://us-rates.use.x402atlas.com/latest
Machine-readable: /resources/36542.json