Roundhouse AI

api.sygnliq.com

Market regime state, execution-cost estimates, bar-quality forensics and backtest audits. No account, no API key — agents pay per call with USDC via x402.

DataLiveeip155:8453Exactvia cdp
https://api.sygnliq.com/v1/regime/current
Activity
—
Nothing indexed for this service or its provider yet. Not a claim that it is unused — only that we hold no record.
$0.02
Verified settled volume
4 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0010
Listed price
As published in the catalog. Always read the live 402 before paying.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-07-28 00:53Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x3A86924d0bb29fF8B1469472f4294CC7E62B54b7

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-SIGNATURE header is required",
  "hints": {
    "mcp": "https://api.sygnliq.com/mcp",
    "docs": "https://api.sygnliq.com/llms.txt",
    "openapi": "https://api.sygnliq.com/openapi.json",
    "free_note": "same engine, rate limited, no payment or signup required",
    "free_to_try": "https://api.sygnliq.com/v1/regime/sample"
  },
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x3A86924d0bb29fF8B1469472f4294CC7E62B54b7",
      "amount": "5000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 60
    }
  ],
  "resource": {
    "url": "https://api.sygnliq.com/v1/regime/current",
    "mimeType": "application/json",
    "description": "Current market volatility regime (STABLE / VOLATILE) with a confidence score and the position-size scalar it implies. Derived from 417k+ measured snapshots; VOLATILE has predicted roughly 2x forward volatility with ~90% persistence. Cheapest way for a trading agent to know what kind of market it is in."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET"
        },
        "output": {
          "type": "json",
          "example": {
            "confidence": 0.76,
            "primary_regime": "STABLE",
            "position_scalar": 0.68
          }
        }
      },
      "tags": [
        "market-data",
        "volatility",
        "regime",
        "risk",
        "trading",
        "agent",
        "x402"
      ],
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input",
          "output"
        ],
        "properties": {
          "input": {
            "type": "object"
          },
          "output": {
            "type": "object"
          }
        }
      },
      "category": "finance",
      "discoverable": true
    }
  },
  "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.

0.001USDC≈ $0.001 USD
on Base · exact scheme

Pay 0.001 USDC on Base to 0x3A86…B54b7. The signed payment is good for 1 minute.

Paid to
0x3A86…B54b7
USD Coin contract
0x8335…02913
Payment window
1 minute
As published
1000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x3A86924d0bb29fF8B1469472f4294CC7E62B54b7",
    "amount": "1000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET"
      },
      "output": {
        "type": "json",
        "example": {
          "confidence": 0.76,
          "primary_regime": "STABLE",
          "position_scalar": 0.68
        }
      }
    },
    "tags": [
      "market-data",
      "volatility",
      "regime",
      "risk",
      "trading",
      "agent",
      "x402"
    ],
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input",
        "output"
      ],
      "properties": {
        "input": {
          "type": "object"
        },
        "output": {
          "type": "object"
        }
      }
    },
    "category": "finance",
    "discoverable": true
  }
}

Provenance

Seen in the source catalog
2026-07-28 00:53Z
Last indexed by Roundhouse
2026-08-09 07:30Z
Last enriched (probe, favicon, geo)
2026-09-23 06:45Z
x402 version
2
Max timeout
60s
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

Nothing indexed for this service or its provider yet. Not a claim that it is unused — only that we hold no record. 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 api.sygnliq.com 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=api.sygnliq.com'
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://api.sygnliq.com/v1/regime/current, 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.