Roundhouse

ArbiPulse

The arbitrage layer for every market — 18 endpoints finding the same thing at two prices: prediction-market cross-venue spreads (Polymarket×Kalshi), GPU compute rental…

DataLiveeip155:8453Exactvia cdp
https://arbipulse.vercel.app/api/etf
EtfNavPremiumDiscountArbitrage
Settlements · 30d
633↑ 475%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$768.65
Verified settled volume
A floor: summed over 5,000 of 11,307 verified settlements.
$0.100
Listed price
As published in the catalog. Always read the live 402 before paying.
18
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-06-06 05:24Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc

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.

{
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc",
      "amount": "100000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F"
      },
      "payTo": "985iFjbnGQ3dJcwXnfRCMSrH4Jnc3kW1N6msR64B5KX1",
      "amount": "100000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://arbipulse.vercel.app/api/etf",
    "tags": [
      "etf-arbitrage",
      "nav",
      "premium-discount",
      "authorized-participant",
      "closed-end-fund",
      "financial-agent",
      "trading-agent",
      "arbitrage"
    ],
    "mimeType": "application/json",
    "description": "ETF NAV premium/discount arbitrage — mechanics for US, European, Asian and crypto ETFs versus spot. For arbitrage and trading agents.",
    "serviceName": "ArbiPulse"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "type": "equity | bond | crypto | commodity | any (default: any)",
            "region": "us | eu | asia | all (default: us)",
            "ticker": "SPY | QQQ | GLD | IBIT | FBTC | IEMG | any ETF ticker (default: IBIT)"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "ticker": "IBIT",
            "scan_time": "2026-06-06T12:00:00Z",
            "data_sources": [
              "Bloomberg NAV data",
              "BlackRock IBIT factsheet",
              "CF Benchmarks BTC reference rate"
            ],
            "region_notes": "US crypto ETFs unique: NAV based on CF Benchmarks BTC reference rate. EU bitcoin ETPs (21Shares, ETC Group) follow similar mechanics.",
            "arb_mechanics": {
              "retail_arb_viability": "Not directly accessible — creation/redemption only available to APs (Goldman, Jane Street, etc.). Retail can trade premium/discount via options strategies.",
              "ap_arbitrage_works_when": "Premium exceeds ~25bps — AP buys BTC spot, delivers to fund, receives IBIT shares at NAV, sells IBIT in market",
              "institutional_opportunity": "Current 18bps premium below AP threshold but approaching it. Monitor for widening.",
              "creation_redemption_threshold_bps": 25
            },
            "current_state": {
              "direction": "premium",
              "confidence": "medium",
              "estimated_premium_discount_bps": 18
            },
            "pulse_suggestions": [],
            "historical_context": {
              "notable_events": [
                "IBIT traded at 0.5% premium launch week Jan 2024",
                "Discount of 15bps during BTC flash crash May 2024"
              ],
              "current_vs_historical": "Premium is above 30-day average of 8bps — elevated but not extreme",
              "typical_spread_range_bps": "5-50bps for crypto ETFs vs BTC spot"
            },
            "related_instruments": [
              {
                "arb_angle": "IBIT/FBTC relative premium spread — if one premiums more than other, relative arb via pairs trade",
                "instrument": "FBTC (Fidelity BTC ETF)",
                "relationship": "Competing product"
              },
              {
                "arb_angle": "If IBIT premium > AP threshold, institutional can short IBIT futures and buy BTC spot",
                "instrument": "BTC Spot (Coinbase/Kraken)",
                "relationship": "Underlying asset"
              }
            ],
            "specific_opportunity": {
              "minimum_size_usd": null,
              "opportunity_type": null,
              "execution_approach": null,
              "opportunity_exists": false,
              "estimated_profit_bps": null,
              "authorized_participant_process": "APs submit creation baskets of $25M+ BTC to BlackRock daily — not retail accessible"
            }
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema"
      }
    },
    "builder-code": {
      "info": {
        "a": "bc_gxy6qn5p"
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "a": {
            "type": "string",
            "pattern": "^[a-z0-9_]{1,32}$",
            "description": "App builder code"
          },
          "s": {
            "type": "array",
            "items": {
              "type": "string",
              "pattern": "^[a-z0-9_]{1,32}$"
            },
            "description": "Service builder codes"
          },
          "w": {
            "type": "string",
            "pattern": "^[a-z0-9_]{1,32}$",
            "description": "Wallet builder code"
          }
        },
        "additionalProperties": false
      }
    }
  },
  "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.

0.1USDC≈ $0.1 USD
on Base · exact scheme

Pay 0.1 USDC on Base to 0x50ab…912fc. The signed payment is good for 5 minutes.

Paid to
0x50ab…912fc
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
100000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc",
    "amount": "100000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "type": "equity | bond | crypto | commodity | any (default: any)",
          "region": "us | eu | asia | all (default: us)",
          "ticker": "SPY | QQQ | GLD | IBIT | FBTC | IEMG | any ETF ticker (default: IBIT)"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "ticker": "IBIT",
          "scan_time": "2026-06-06T12:00:00Z",
          "data_sources": [
            "Bloomberg NAV data",
            "BlackRock IBIT factsheet",
            "CF Benchmarks BTC reference rate"
          ],
          "region_notes": "US crypto ETFs unique: NAV based on CF Benchmarks BTC reference rate. EU bitcoin ETPs (21Shares, ETC Group) follow similar mechanics.",
          "arb_mechanics": {
            "retail_arb_viability": "Not directly accessible — creation/redemption only available to APs (Goldman, Jane Street, etc.). Retail can trade premium/discount via options strategies.",
            "ap_arbitrage_works_when": "Premium exceeds ~25bps — AP buys BTC spot, delivers to fund, receives IBIT shares at NAV, sells IBIT in market",
            "institutional_opportunity": "Current 18bps premium below AP threshold but approaching it. Monitor for widening.",
            "creation_redemption_threshold_bps": 25
          },
          "current_state": {
            "direction": "premium",
            "confidence": "medium",
            "estimated_premium_discount_bps": 18
          },
          "pulse_suggestions": [],
          "historical_context": {
            "notable_events": [
              "IBIT traded at 0.5% premium launch week Jan 2024",
              "Discount of 15bps during BTC flash crash May 2024"
            ],
            "current_vs_historical": "Premium is above 30-day average of 8bps — elevated but not extreme",
            "typical_spread_range_bps": "5-50bps for crypto ETFs vs BTC spot"
          },
          "related_instruments": [
            {
              "arb_angle": "IBIT/FBTC relative premium spread — if one premiums more than other, relative arb via pairs trade",
              "instrument": "FBTC (Fidelity BTC ETF)",
              "relationship": "Competing product"
            },
            {
              "arb_angle": "If IBIT premium > AP threshold, institutional can short IBIT futures and buy BTC spot",
              "instrument": "BTC Spot (Coinbase/Kraken)",
              "relationship": "Underlying asset"
            }
          ],
          "specific_opportunity": {
            "minimum_size_usd": null,
            "opportunity_type": null,
            "execution_approach": null,
            "opportunity_exists": false,
            "estimated_profit_bps": null,
            "authorized_participant_process": "APs submit creation baskets of $25M+ BTC to BlackRock daily — not retail accessible"
          }
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema"
    }
  }
}

Provenance

Seen in the source catalog
2026-06-06 05:24Z
Last indexed by Roundhouse
2026-06-15 08:00Z
Last enriched (probe, favicon, geo)
2026-09-13 16:15Z
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

No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. 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 ArbiPulse 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=ArbiPulse'
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://arbipulse.vercel.app/api/etf, 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.