Roundhouse

market.memoryapi.org

Cross-exchange cryptocurrency arbitrage opportunities. Find best buy/sell prices across major exchanges.

TradingLiveeip155:8453Exactvia cdp
https://market.memoryapi.org/x402/market/cex_arb
Calls · 30d
3→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$6.21
Verified settled volume
1,654 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.
3
Calls · 30d
Upstream's own call count for this endpoint, not ours.
3
Unique payers · 30d
Last called 2026-09-08 08:01Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x24FAcafEB49b4e3FACF0B3e69604A2F4640c9bf2

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.

0.001USDC≈ $0.001 USD
on Base · exact scheme

Pay 0.001 USDC on Base to 0x24FA…c9bf2. The signed payment is good for 5 minutes.

Paid to
0x24FA…c9bf2
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
1000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x24FAcafEB49b4e3FACF0B3e69604A2F4640c9bf2",
    "amount": "1000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "tags": [
        "finance",
        "stocks",
        "crypto",
        "market"
      ],
      "input": {
        "type": "http",
        "method": "GET",
        "schema": {
          "required": [],
          "properties": {
            "coin": {
              "type": "string",
              "description": "Single coin to analyze (default: bitcoin)"
            },
            "coins": {
              "type": "string",
              "description": "Comma-separated list for multiple coins (e.g. bitcoin,ethereum,solana)"
            },
            "limit": {
              "type": "integer",
              "description": "Max exchanges to return (default: 10, max: 50)"
            }
          }
        },
        "queryParams": {
          "coin": "bitcoin",
          "coins": "bitcoin,ethereum,solana",
          "limit": "10"
        }
      },
      "output": {
        "example": {
          "coin": "bitcoin",
          "as_of": "2025-01-02T18:00:00Z",
          "signal": "ARBITRAGE",
          "source": "CoinGecko",
          "success": true,
          "best_buy": {
            "price": 42300.5,
            "exchange": "Kraken"
          },
          "best_sell": {
            "price": 42600.75,
            "exchange": "Binance"
          },
          "spread_pct": 0.7102,
          "spread_usd": 300.25,
          "all_exchanges": [
            {
              "name": "Binance",
              "price": 42600.75,
              "target_currency": "USDT"
            }
          ]
        }
      },
      "iconUrl": "https://memoryapi.org/icon.png",
      "description": "Cross-exchange crypto arbitrage from CoinGecko. Identifies price spreads for crypto assets across major exchanges (Binance, Coinbase, Kraken, etc.) for USD/USDT/USDC pairs.",
      "serviceName": "MemoryAPI Market"
    },
    "schema": {
      "properties": {
        "input": {
          "required": [
            "method"
          ],
          "properties": {
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-09-08 08:01Z
Last indexed by Roundhouse
2026-09-24 09:00Z
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 market.memoryapi.org 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=market.memoryapi.org'
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://market.memoryapi.org/x402/market/cex_arb, 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.