Roundhouse AI

Kronos Crypto Data & Forecasts

Paid market-intelligence API over x402

TradingLiveeip155:8453Exactvia cdp
https://kronossignals.com/api/v1/stablecoins
StablecoinsUsdtUsdcDefiMarket-cap
Calls · 30d
9↓ 14%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$96.98
Verified settled volume
A floor: summed over 5,000 of 5,757 verified settlements.
$0.020
Listed price
As published in the catalog. Always read the live 402 before paying.
9
Calls · 30d
Upstream's own call count for this endpoint, not ours.
8
Unique payers · 30d
Last called 2026-09-09 07:02Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x36038e1d712c5e39f35952164ec58ec2b96caee7

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.

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x36038e1d712c5e39f35952164ec58ec2b96caee7",
      "amount": "20000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://kronossignals.com/api/v1/stablecoins",
    "tags": [
      "stablecoins",
      "usdt",
      "usdc",
      "defi",
      "market-cap",
      "flows",
      "defillama",
      "crypto",
      "capital-flows",
      "ai-agents",
      "x402"
    ],
    "mimeType": "application/json",
    "description": "Stablecoin market cap, top-10 breakdown by dominance, and 7d/30d supply flows (mint/burn) via DeFiLlama. Shows total stablecoin market cap, per-coin dominance %, and net capital entering/leaving crypto. 15-minute caching. Never fabricated — returns available:false when sources are unreachable. $0.02 USDC via x402.",
    "serviceName": "Kronos Crypto Data & Forecasts"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "pathParams": {},
          "queryParams": {}
        },
        "output": {
          "type": "json",
          "example": {
            "as_of": "2026-01-01T00:00:00.000Z",
            "flows": {
              "flow_7d_pct": 0.75,
              "flow_7d_usd": 1200000000,
              "flow_30d_pct": 3.23,
              "flow_30d_usd": 5000000000
            },
            "stale": false,
            "source": "DeFiLlama stablecoins API (stablecoins.llama.fi)",
            "disclaimer": "Informational only; not financial advice. Stablecoin flows (mint/burn) approximate capital entering/leaving crypto.",
            "interpretation": "net +$1.2bn over 7d = capital inflow to crypto",
            "top_stablecoins": [
              {
                "name": "Tether",
                "symbol": "USDT",
                "circulating": 110000000000,
                "dominance_pct": 68.75
              }
            ],
            "as_of_age_seconds": 0,
            "total_stablecoin_mcap": 160000000000
          },
          "example_kind": "illustrative_schema_only",
          "example_note": "Placeholder values and timestamps, not market data."
        }
      },
      "schema": {
        "type": "object",
        "$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"
              },
              "pathParams": {
                "type": "object"
              },
              "queryParams": {
                "type": "object",
                "properties": {}
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      },
      "routeTemplate": ":var1"
    }
  },
  "x402Version": 2
}

Accepts

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

0.02USDC≈ $0.02 USD
on Base · exact scheme

Pay 0.02 USDC on Base to 0x3603…caee7. The signed payment is good for 5 minutes.

Paid to
0x3603…caee7
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
20000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x36038e1d712c5e39f35952164ec58ec2b96caee7",
    "amount": "20000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "pathParams": {},
        "queryParams": {}
      },
      "output": {
        "type": "json",
        "example": {
          "as_of": "2026-01-01T00:00:00.000Z",
          "flows": {
            "flow_7d_pct": 0.75,
            "flow_7d_usd": 1200000000,
            "flow_30d_pct": 3.23,
            "flow_30d_usd": 5000000000
          },
          "stale": false,
          "source": "DeFiLlama stablecoins API (stablecoins.llama.fi)",
          "disclaimer": "Informational only; not financial advice. Stablecoin flows (mint/burn) approximate capital entering/leaving crypto.",
          "interpretation": "net +$1.2bn over 7d = capital inflow to crypto",
          "top_stablecoins": [
            {
              "name": "Tether",
              "symbol": "USDT",
              "circulating": 110000000000,
              "dominance_pct": 68.75
            }
          ],
          "as_of_age_seconds": 0,
          "total_stablecoin_mcap": 160000000000
        },
        "example_kind": "illustrative_schema_only",
        "example_note": "Placeholder values and timestamps, not market data."
      }
    },
    "schema": {
      "type": "object",
      "$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"
            },
            "pathParams": {
              "type": "object"
            },
            "queryParams": {
              "type": "object",
              "properties": {}
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    },
    "routeTemplate": ":var1"
  }
}

Provenance

Seen in the source catalog
2026-09-09 07:02Z
Last indexed by Roundhouse
2026-09-24 13:30Z
Last enriched (probe, favicon, geo)
2026-09-14 01:15Z
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 Kronos Crypto Data & Forecasts 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=Kronos%20Crypto%20Data%20%26%20Forecasts'
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://kronossignals.com/api/v1/stablecoins, 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.