Roundhouse AI

Usenami

Per-venue slippage scan for one crypto perpetual at $1K/$5K/$10K notional, across tracked CEX and DEX venues — every venue sorted by lowest slippage, with BBO and depth. Raw scan, no opinionated ranking: where a given size is cheapest to execute.

TradingLiveeip155:8453Exactvia cdp
https://api.usenami.io/v1/orderbook/multi-venue-slippage
FundingPerpetualTradingMulti-venueMarket-data
Calls · 30d
4↑ 3.7%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 21 snapshots so far.
$5.45
Verified settled volume
2,081 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0050
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 2026-09-15 07:24Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x1538726707212F4dB3EB67cEc0910422A310475c

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": "0x1538726707212F4dB3EB67cEc0910422A310475c",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://api.usenami.io/v1/orderbook/multi-venue-slippage",
      "description": "Per-venue slippage scan for one crypto perpetual at $1K/$5K/$10K notional, across tracked CEX and DEX venues — every venue sorted by lowest slippage, with BBO and depth. Raw scan, no opinionated ranking: where a given size is cheapest to execute.",
      "outputSchema": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "ticker": {
              "type": "string",
              "required": true,
              "description": "Base ticker. Required."
            },
            "size_usd": {
              "enum": [
                1000,
                5000,
                10000
              ],
              "type": "integer",
              "required": false,
              "description": "Notional size. Default 10000."
            }
          }
        },
        "output": {
          "count": 2,
          "ticker": "BTC",
          "venues": [
            {
              "venue": "binance",
              "best_ask": 104251,
              "best_bid": 104250.5,
              "spread_bps": 0.48,
              "updated_at": "2026-05-31T17:00:00Z",
              "slippage_bps": 1.2,
              "ask_depth_usd": 220000,
              "bid_depth_usd": 250000
            },
            {
              "venue": "okx",
              "best_ask": 104252.5,
              "best_bid": 104248,
              "spread_bps": 0.43,
              "updated_at": "2026-05-31T17:00:00Z",
              "slippage_bps": 1.8,
              "ask_depth_usd": 195000,
              "bid_depth_usd": 180000
            }
          ],
          "size_usd": 10000
        }
      },
      "maxAmountRequired": "5000",
      "maxTimeoutSeconds": 300
    }
  ],
  "x402Version": 1
}

Accepts

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

0.005USDC≈ $0.005 USD
on Base · exact scheme

Pay 0.005 USDC on Base to 0x1538…0475c. The signed payment is good for 5 minutes.

Paid to
0x1538…0475c
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
5000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x1538726707212F4dB3EB67cEc0910422A310475c",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "ticker": {
            "type": "string",
            "required": true,
            "description": "Base ticker. Required."
          },
          "size_usd": {
            "enum": [
              1000,
              5000,
              10000
            ],
            "type": "integer",
            "required": false,
            "description": "Notional size. Default 10000."
          }
        }
      },
      "output": {
        "type": "json",
        "example": {
          "count": 2,
          "ticker": "BTC",
          "venues": [
            {
              "venue": "binance",
              "best_ask": 104251,
              "best_bid": 104250.5,
              "spread_bps": 0.48,
              "updated_at": "2026-05-31T17:00:00Z",
              "slippage_bps": 1.2,
              "ask_depth_usd": 220000,
              "bid_depth_usd": 250000
            },
            {
              "venue": "okx",
              "best_ask": 104252.5,
              "best_bid": 104248,
              "spread_bps": 0.43,
              "updated_at": "2026-05-31T17:00:00Z",
              "slippage_bps": 1.8,
              "ask_depth_usd": 195000,
              "bid_depth_usd": 180000
            }
          ],
          "size_usd": 10000
        }
      }
    },
    "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"
            },
            "method": {
              "type": "string"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-09-15 07:24Z
Last indexed by Roundhouse
2026-09-17 01:10Z
Last enriched (probe, favicon, geo)
2026-09-23 01:15Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 410
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. 21 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 Usenami 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=Usenami'
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.usenami.io/v1/orderbook/multi-venue-slippage, 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.