Saylor Innovations Data Desk
Position size from account equity, risk percent, entry and stop: units, notional, leverage needed and target prices at chosen R multiples.
TradingUnknowneip155:8453Exactvia facilitator:payAI
Position size calculator cryptoSize a trade risking 1 percentStop loss position sizingRisk reward target pricesLeverage needed for trade size
Calls · 30d
1
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 9 snapshots so far.
$15.76
Verified settled volume
1,657 settlements proven x402 by their on-chain EIP-3009 marker.
$0.010
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
0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aaThe 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.
0.01USDC≈ $0.01 USD
on Base · exact scheme
Pay 0.01 USDC on Base to 0xA2A8…fc8aa. The signed payment is good for 2 minutes.
- Paid to
- 0xA2A8…fc8aa
- USD Coin contract
- 0x8335…02913
- Payment window
- 2 minutes
- As published
- 10000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"memo": "saylor:datadesk:position-size",
"name": "USD Coin",
"version": "2",
"facilitatorOnly": true,
"assetTransferMethod": "eip3009"
},
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 120
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"stop_price": "63000",
"account_usd": "10000",
"entry_price": "65000",
"risk_percent": "1"
}
},
"output": {
"type": "json",
"example": {
"note": "Sizes the trade so that hitting the stop loses about risk_percent of the account (fees included if fee_percent is given). Slippage can make a real stop fill worse.",
"side": "long",
"source": "Fixed fractional position sizing",
"targets": [
{
"price": 67000,
"profit_usd": 100,
"r_multiple": 1
},
{
"price": 69000,
"profit_usd": 200,
"r_multiple": 2
},
{
"price": 71000,
"profit_usd": 300,
"r_multiple": 3
}
],
"risk_usd": 100,
"stop_price": 63000,
"account_usd": 10000,
"entry_price": 65000,
"risk_percent": 1,
"leverage_needed": 0.325,
"margin_for_10x_usd": 325,
"position_size_units": 0.05,
"position_notional_usd": 3250,
"stop_distance_percent": 3.0769
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"account_usd",
"entry_price",
"risk_percent",
"stop_price"
],
"properties": {
"stop_price": {
"type": "string",
"description": "stop loss price (below entry = long, above = short)"
},
"account_usd": {
"type": "string",
"description": "account equity"
},
"entry_price": {
"type": "string",
"description": "planned entry"
},
"risk_percent": {
"type": "string",
"description": "percent of the account to risk, e.g. 1"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string",
"const": "json"
},
"example": {
"type": "object",
"required": [
"position_size_units",
"position_notional_usd"
],
"properties": {
"note": {
"type": "string",
"description": "Plain-language caveat about how to read and use the result"
},
"side": {
"type": "string",
"description": "Trade direction inferred from the stop (below entry is long)"
},
"source": {
"type": "string",
"description": "Where the data or formula comes from"
},
"targets": {
"type": "array",
"items": {
"type": "object",
"properties": {
"price": {
"type": [
"number",
"null"
],
"description": "Target price"
},
"profit_usd": {
"type": [
"number",
"null"
],
"description": "Profit in USD if the target is reached"
},
"r_multiple": {
"type": [
"number",
"null"
],
"description": "Multiple of the initial risk"
}
}
},
"description": "Take-profit prices at the requested R multiples"
},
"risk_usd": {
"type": "number",
"description": "Amount lost if the stop is hit"
},
"stop_price": {
"type": "number",
"description": "Stop loss price"
},
"account_usd": {
"type": "number",
"description": "Account equity used"
},
"entry_price": {
"type": "number",
"description": "Planned entry price"
},
"risk_percent": {
"type": "number",
"description": "Percent of the account risked"
},
"leverage_needed": {
"type": "number",
"description": "Notional divided by account equity"
},
"margin_for_10x_usd": {
"type": "number",
"description": "Margin needed if the position is opened at 10x"
},
"position_size_units": {
"type": "number",
"description": "Units to buy or sell so the stop loses the risk amount"
},
"position_notional_usd": {
"type": "number",
"description": "Notional value of the position in USD"
},
"stop_distance_percent": {
"type": "number",
"description": "Distance from entry to stop, in percent"
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-26 03:31Z
- Last indexed by Roundhouse
- 2026-10-26 12:46Z
- Last enriched (probe, favicon, geo)
- —
- x402 version
- 2
- Max timeout
- 120s
- Liveness probe
- Not probed
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. 9 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service Saylor Innovations Data Desk 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=Saylor%20Innovations%20Data%20Desk' 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://saylorinnovations.com/api/trading/position-size, 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.