Roundhouse

aizamon.com

No description published for this endpoint.

OtherLiveeip155:8453Exactvia facilitator:thirdweb
https://aizamon.com/x402/v1/spread
Calls · 30d
28↑ 268%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 19 snapshots so far.
$5.47
Verified settled volume
115 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.
—
Calls · 30d
Upstream's own call count for this endpoint, not ours.
—
Unique payers · 30d
Never called
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xB88544cF8E9E97EEb2F313e0D3528FC1e50C2887

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": "X-PAYMENT header is required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "sku": "SKU_AG_SPREAD_01",
        "name": "USD Coin",
        "version": "2",
        "intentId": "0f8dc32d-9e9f-49e5-86aa-3726409335c5",
        "amountUsdc": 0.01,
        "resourceUrl": "https://aizamon.com/x402/v1/spread",
        "assetTransferMethod": "eip3009"
      },
      "payTo": "0xB88544cF8E9E97EEb2F313e0D3528FC1e50C2887",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://aizamon.com/x402/v1/spread",
      "description": "Polymarket vs Kalshi cross-venue yes-price spread — $0.01. Pass ?q= topic (or omit for top gap). Exact yes prices, gapCents, cheaper venue, and deep links in one composable read. Under every $0.10 spend cap.",
      "maxAmountRequired": "10000",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://aizamon.com/x402/v1/spread",
    "mimeType": "application/json",
    "description": "Polymarket vs Kalshi cross-venue yes-price spread — $0.01. Pass ?q= topic (or omit for top gap). Exact yes prices, gapCents, cheaper venue, and deep links in one composable read. Under every $0.10 spend cap."
  },
  "acceptsV2": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "sku": "SKU_AG_SPREAD_01",
        "name": "USD Coin",
        "version": "2",
        "intentId": "0f8dc32d-9e9f-49e5-86aa-3726409335c5",
        "amountUsdc": 0.01,
        "resourceUrl": "https://aizamon.com/x402/v1/spread",
        "assetTransferMethod": "eip3009"
      },
      "payTo": "0xB88544cF8E9E97EEb2F313e0D3528FC1e50C2887",
      "amount": "10000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxAmountRequired": "10000",
      "maxTimeoutSeconds": 300
    }
  ],
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "headers": {
            "x-agent-id": "optional-stable-bot-id",
            "x-aizamon-ref": "optional-referrer-agent-id",
            "PAYMENT-SIGNATURE": "<base64url PaymentPayload v2>"
          },
          "queryParams": {
            "q": "market topic keywords (optional — omit for top live gap)",
            "echo": "optional string echoed back"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "ok": true,
            "sku": "SKU_AG_SPREAD_01",
            "result": {
              "spread": {
                "query": "openai ipo",
                "topic": "Will Anthropic or OpenAI IPO first?",
                "kalshi": {
                  "url": "https://kalshi.com/…",
                  "yes": 0.42,
                  "ticker": "…"
                },
                "gapCents": 8,
                "cheaperOn": "kalshi",
                "polymarket": {
                  "url": "https://polymarket.com/…",
                  "yes": 0.5,
                  "slug": "…"
                }
              },
              "product": "Cross-venue Spread — exact tick"
            },
            "protocol": "x402"
          }
        }
      },
      "schema": {
        "openapi": "https://aizamon.com/x402/services.json"
      },
      "discovery": {
        "tags": [
          "x402",
          "spread",
          "arbitrage",
          "polymarket",
          "kalshi",
          "prediction-market",
          "mispricing",
          "under-cap",
          "market-data"
        ],
        "category": "under-cap-micro"
      }
    },
    "aizamon": {
      "sku": "SKU_AG_SPREAD_01",
      "note": "Standard x402 v2. Prefer PAYMENT-SIGNATURE (EIP-3009). Legacy: send USDC then X-PAYMENT {intentId,txHash}.",
      "asset": "USDC",
      "payTo": "0xB88544cF8E9E97EEb2F313e0D3528FC1e50C2887",
      "accept": "https://aizamon.com/x402/v1/spread",
      "network": "eip155:8453",
      "resumed": true,
      "settler": {
        "mode": "cdp_facilitator",
        "note": "CDP facilitator will verify+settle PAYMENT-SIGNATURE payloads (Bazaar indexing).",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "network": "eip155:8453",
        "payaiUrl": "https://facilitator.payai.network",
        "cdpFacilitator": true,
        "settlerAddress": "0x76ECF3983f71F397e31D4645eAf8A493347e7FfC",
        "payaiFacilitator": true,
        "localSettlerConfigured": true
      },
      "intentId": "0f8dc32d-9e9f-49e5-86aa-3726409335c5",
      "protocol": "x402",
      "queryHint": "Pass ?q= market topic keywords (e.g. ?q=openai+ipo). Optional ?echo= string echoed back.",
      "amountUsdc": 0.01,
      "howToSettle": {
        "headers": {
          "x-agent-id": "<optional-stable-bot-id>",
          "PAYMENT-SIGNATURE": "base64url(PaymentPayload v2 with resource + accepted + payload.authorization)"
        },
        "preferred": "x402 client SDK / wallet agent signs EIP-3009 and retries with PAYMENT-SIGNATURE",
        "legacyHeaders": {
          "X-PAYMENT": "base64url({\"intentId\":\"…\",\"txHash\":\"0x…\",\"paymentRail\":\"usdc_base\"})"
        },
        "classicFulfill": {
          "body": {
            "txHash": "0x…",
            "payload": {},
            "intentId": "0f8dc32d-9e9f-49e5-86aa-3726409335c5",
            "paymentRail": "usdc_base"
          },
          "path": "https://aizamon.com/fulfill",
          "method": "POST"
        }
      },
      "nextStepCute": "Any x402 wallet: sign PAYMENT-SIGNATURE for 0.01 USDC on Base, retry this URL. No MCP install. No email.",
      "recoveryToken": "a00fbd065ed28843dfc53e68c4bb23616e526165e5e14f8d"
    }
  },
  "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.

0.001USDC≈ $0.001 USD
on Base · exact scheme

Pay 0.001 USDC on Base to 0xB885…C2887. The signed payment is good for 5 minutes.

Paid to
0xB885…C2887
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
1000 smallest units
Returns
application/json
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "payTo": "0xB88544cF8E9E97EEb2F313e0D3528FC1e50C2887",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://aizamon.com/x402/v1/spread",
    "description": "",
    "maxAmountRequired": "1000",
    "maxTimeoutSeconds": 300
  }
]

Provenance

Seen in the source catalog
2026-10-21 17:03Z
Last indexed by Roundhouse
2026-10-23 20:46Z
Last enriched (probe, favicon, geo)
2026-10-14 10:46Z
x402 version
1
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. 19 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 aizamon.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=aizamon.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://aizamon.com/x402/v1/spread, 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. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.