Roundhouse AI

DEX Data & Agent Utilities

DONNY NGUYEN LLC builds developer and AI-agent infrastructure: MCP servers for on-chain market data, pay-per-call HTTP 402 endpoints settling USDC on Base, and public data actors on Apify.

TradingLiveeip155:8453Exactvia cdp
https://x402.donnyautomation.com/treasury
TreasuryYield-curveRatesMacroFixed-income
Calls · 30d
4↑ 44%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$3.07
Verified settled volume
292 settlements proven x402 by their on-chain EIP-3009 marker.
$0.030
Listed price
As published in the catalog. Always read the live 402 before paying.
4
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-09-23 02:40Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x2740651e046c59aB2A6510401140643292d3a96F

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.03USDC≈ $0.03 USD
on Base · exact scheme

Pay 0.03 USDC on Base to 0x2740…3a96F. The signed payment is good for 5 minutes.

Paid to
0x2740…3a96F
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
30000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x2740651e046c59aB2A6510401140643292d3a96F",
    "amount": "30000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "latest": "1"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "ts": "2026-08-03T00:00:00.000Z",
          "date": "2026-08-03",
          "curve": [
            {
              "tenor": "3 Mo",
              "months": 3,
              "percent": 3.91
            },
            {
              "tenor": "2 Yr",
              "months": 24,
              "percent": 4.25
            },
            {
              "tenor": "10 Yr",
              "months": 120,
              "percent": 4.7
            }
          ],
          "spreads": {
            "unit": "percentage points",
            "2s10s": 0.45,
            "3m10y": 0.79,
            "5s30s": 0.83
          },
          "isLatest": true,
          "inversion": {
            "2s10s": false,
            "3m10y": false,
            "anyInverted": false
          },
          "attribution": "Daily Treasury Par Yield Curve Rates, U.S. Department of the Treasury (public domain)."
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "required": [],
              "properties": {
                "date": {
                  "type": "string",
                  "description": "YYYY-MM-DD business day, for a specific past day. A non-publication day returns 404 with the available range, not the nearest guess."
                },
                "latest": {
                  "type": "string",
                  "description": "Pass latest=1 for the most recent published curve. Use instead of date, not with it."
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-09-23 02:40Z
Last indexed by Roundhouse
2026-09-25 12:50Z
Last enriched (probe, favicon, geo)
2026-09-14 01:45Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 402
Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service DEX Data & Agent Utilities and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=DEX%20Data%20%26%20Agent%20Utilities'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://x402.donnyautomation.com/treasury, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.