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AI Inference · x402 · early usage

Official US macro data read straight from Chainlink contracts

Official US macro data read straight from Chainlink contracts. No LLM, no API key. Answers "what is US GDP growth", "current US inflation PCE", "what is SOFR today", "official US economic data". 7 series: real GDP level+growth, PCE index+inflation, real final…

by macropulse.theaslangroupllc.com · discovered, not yet claimed by its owner · updated 2026-10-08

30d calls3
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

Official US macro data read straight from Chainlink contracts. No LLM, no API key. Answers "what is US GDP growth", "current US inflation PCE", "what is SOFR today", "official US economic data". 7 series: real GDP level+growth, PCE index+inflation, real final sales, SOFR. Six are BEA (Dept of Commerce) on Base, SOFR is NY Fed on Ethereum - we assemble both chains. Each value ships its contract + round ID: verify us on an immutable ledger.

Tags: us-gdp · inflation · pce · sofr · bea · bazaar · builder-code · reconciliation

Call contract

Method
GET
Input
query parameters
Output
json
Last paid call
2026-10-08
Input example from Bazaar metadata
{
  "series": "gdp_change,sofr"
}
Output example
{
  "deterministic": true,
  "series": [
    {
      "as_of": "2026-06-25T12:32:41.000Z",
      "chain": "eip155:8453",
      "contract": "0xe0eda54fC1362C0d7d0ff855E4fCEA79916Fe094",
      "key": "gdp_change",
      "name": "Real GDP — Percent Change (Annual Rate)",
      "round_id": "36893488147419103237",
      "units": "percent, annualised rate",
      "value": 2.1
    }
  ],
  "source": {
    "license": "public domain (US federal government work)",
    "transport": "Chainlink data feeds",
    "verifiable": true
  }
}

Use with an agent

  1. Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
  2. Inspect. Fetch /resources/28689.json for the price and payment options.
  3. Pay. Call GET https://macropulse.theaslangroupllc.com/api/macro/us. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
  4. 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, Solana, eip155:4663, Polygon, Arbitrum One, eip155:480, eip155:143, eip155:196, eip155:999, algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73k, xrpl:0, eip155:56, 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, Solana, eip155:4663, Polygon, Arbitrum One, eip155:480, eip155:143, eip155:196, eip155:999, algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73k, xrpl:0, eip155:56
Demand
3 calls · 2 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

SchemeNetworkAssetAmountPay toTimeout
exactBase
eip155:8453		USDC$0.010x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc300s
exactBase
eip155:8453		USDC$0.010x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc604900s
exactSolana
solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp		USDC$0.01985iFjbnGQ3dJcwXnfRCMSrH4Jnc3kW1N6msR64B5KX1300s
exacteip155:4663
eip155:4663		0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168100000x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc300s
exactPolygon
eip155:137		USDC$0.010x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc300s
exactArbitrum One
eip155:42161		USDC$0.010x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc300s
exacteip155:480
eip155:480		0x79A02482A880bCe3F13E09da970dC34dB4cD24D1100000x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc300s
exacteip155:143
eip155:143		0x754704Bc059F8C67012fEd69BC8A327a5aafb603100000x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc300s
exacteip155:196
eip155:196		0x779ded0c9e1022225f8e0630b35a9b54be713736100000x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc300s
exacteip155:999
eip155:999		0xb88339CB7199b77E23DB6E890353E22632Ba630f100000x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc300s
exactalgorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73k
algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73k		315667041000062A253YPATFNJCPRKID3FKD77MYJFNTVRYRP4B4JWG36EGLPY7UXFWGI7I300s
exactxrpl:0
xrpl:0		XRP10000rMnHeutYALco8RYFVcmuU4BCgSzBpPEh32300s
exactxrpl:0
xrpl:0		524C5553440000000000000000000000000000000.01rMnHeutYALco8RYFVcmuU4BCgSzBpPEh32300s
exacteip155:56
eip155:56		0x8d0D000Ee44948FC98c9B98A4FA4921476f08B0d100000000000000000x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc300s
accepts[] (raw JSON)
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "amountUsd": 0.01,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "amountUsd": 0.01,
    "maxTimeoutSeconds": 604900
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "985iFjbnGQ3dJcwXnfRCMSrH4Jnc3kW1N6msR64B5KX1",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "10000",
    "amountUsd": 0.01,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:4663",
    "payTo": "0x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc",
    "asset": "0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168",
    "amount": "10000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "payTo": "0x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "10000",
    "amountUsd": 0.01,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "payTo": "0x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "10000",
    "amountUsd": 0.01,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:480",
    "payTo": "0x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc",
    "asset": "0x79A02482A880bCe3F13E09da970dC34dB4cD24D1",
    "amount": "10000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:143",
    "payTo": "0x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc",
    "asset": "0x754704Bc059F8C67012fEd69BC8A327a5aafb603",
    "amount": "10000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:196",
    "payTo": "0x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc",
    "asset": "0x779ded0c9e1022225f8e0630b35a9b54be713736",
    "amount": "10000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:999",
    "payTo": "0x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc",
    "asset": "0xb88339CB7199b77E23DB6E890353E22632Ba630f",
    "amount": "10000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73k",
    "payTo": "62A253YPATFNJCPRKID3FKD77MYJFNTVRYRP4B4JWG36EGLPY7UXFWGI7I",
    "asset": "31566704",
    "amount": "10000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "xrpl:0",
    "payTo": "rMnHeutYALco8RYFVcmuU4BCgSzBpPEh32",
    "asset": "XRP",
    "amount": "10000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "xrpl:0",
    "payTo": "rMnHeutYALco8RYFVcmuU4BCgSzBpPEh32",
    "asset": "524C555344000000000000000000000000000000",
    "amount": "0.01",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:56",
    "payTo": "0x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc",
    "asset": "0x8d0D000Ee44948FC98c9B98A4FA4921476f08B0d",
    "amount": "10000000000000000",
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)
{
  "properties": {
    "errors": {
      "additionalProperties": {
        "properties": {
          "description": {
            "type": "string"
          },
          "example": {
            "type": "object"
          }
        },
        "required": [
          "description"
        ],
        "type": "object"
      },
      "description": "Documented error responses, keyed by HTTP status code",
      "type": "object"
    },
    "example": {
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}
Example shape — generated from the schema, not a captured live response
{
  "errors": {},
  "example": {},
  "type": "string"
}

Examples

curl
curl "https://macropulse.theaslangroupllc.com/api/macro/us"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://macropulse.theaslangroupllc.com/api/macro/us");
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://macropulse.theaslangroupllc.com/api/macro/us")
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
macropulse.theaslangroupllc.com
Endpoint
https://macropulse.theaslangroupllc.com/api/macro/us
Machine-readable
/resources/28689.json