saylorinnovations.com
No description published for this endpoint.
TradingLiveeip155:8453Exactvia facilitator:thirdweb
Calls · 30d
2
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 15 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.
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 to access this resource.",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"memo": "saylor:datadesk:defi-stablecoins",
"name": "USD Coin",
"note": "Base settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
"version": "2",
"facilitatorOnly": true,
"assetTransferMethod": "eip3009"
},
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 120
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"memo": "saylor:datadesk:defi-stablecoins",
"name": "USD Coin",
"note": "Polygon settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
"version": "2",
"facilitatorOnly": true,
"assetTransferMethod": "eip3009"
},
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"amount": "10000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 120
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"memo": "saylor:datadesk:defi-stablecoins",
"name": "USD Coin",
"note": "Arbitrum settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
"version": "2",
"facilitatorOnly": true,
"assetTransferMethod": "eip3009"
},
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"amount": "10000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 120
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"memo": "saylor:datadesk:defi-stablecoins",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpkZWZpLXN0YWJsZWNvaW5zIiwicmVmZXJlbmNlIjoiMlh2c1U0RHFRM2JxNmpwM3NEdTk0WkZYNVZpZFJlVDFCYW12MVpZOHBwQ1AiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFUGpGV2RkNUF1ZnFTU3FlTTJxTjF4enliYXBDOEc0d0VHR2tad3lURHQxdiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5MjM3NDQzNTkzMX0._ix30h5-5qeAOx3kAupD50voLG5duvc8IcjguHpMEBg",
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
"reference": "2XvsU4DqQ3bq6jp3sDu94ZFX5VidReT1Bamv1ZY8ppCP"
},
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"amount": "10000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 120
},
{
"asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
"extra": {
"memo": "saylor:datadesk:defi-stablecoins",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpkZWZpLXN0YWJsZWNvaW5zIiwicmVmZXJlbmNlIjoiR2tUOHVnRVJKTTVZRlVQaWR3dGpUbk1iU1hQN1dhdzJENHplZzFVTTJvTGoiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFczl2TUZyemFDRVJtSmZyRjRIMkZZRDRLQ29Oa1kxMU1jQ2U4QmVud05ZQiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5MjM3NDQzNTkzMX0.2F63_z85KFgEfUxO8CUnW2F0MR8pYfc5LMCy4ENdyxA",
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
"reference": "GkT8ugERJM5YFUPidwtjTnMbSXP7Waw2D4zeg1UM2oLj"
},
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"amount": "10000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 120
},
{
"asset": "So11111111111111111111111111111111111111112",
"extra": {
"memo": "saylor:datadesk:defi-stablecoins",
"note": "Native SOL: send lamports with a system transfer, not an SPL transfer. Price is quoted live and this quote expires in 120s.",
"native": true,
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpkZWZpLXN0YWJsZWNvaW5zIiwicmVmZXJlbmNlIjoiQ3NHNUJIdjJHUGc4bnNEQW1LM1o0Zm1ReVd3dlJ5bkdoZGVKNmlnRHp0QkgiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOm51bGwsIm1pbkFtb3VudCI6OTI1NTYsImV4cCI6MTc5MjM3NDQzNTkzMX0.VednbtCmTxgV4WeqhEs-t8_9b5SqDJjXcO8jVIJlZeE",
"reference": "CsG5BHv2GPg8nsDAmK3Z4fmQyWwvRynGhdeJ6igDztBH",
"solUsdPrice": 104.8,
"quotedLamports": "95419"
},
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"amount": "92556",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 120
}
],
"resource": {
"url": "https://saylorinnovations.com/api/defi/stablecoins?q=usd&limit=5",
"tags": [
"stablecoin",
"peg deviation",
"depeg",
"circulating supply",
"usdt usdc"
],
"iconUrl": "https://saylorinnovations.com/og-image.jpg",
"mimeType": "application/json",
"description": "Stablecoin supply and peg - circulating supply, price, peg deviation, 1d/7d/30d change and top chains for USDT, USDC and 300+ stablecoins",
"serviceName": "Saylor Innovations Data Desk"
},
"extensions": {
"tags": [
"stablecoin",
"peg deviation",
"depeg",
"circulating supply",
"usdt usdc"
],
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"q": "usd",
"limit": "5"
}
},
"output": {
"type": "json",
"example": {
"query": "usd",
"source": "DefiLlama stablecoins",
"matched": 209,
"stablecoins": [
{
"name": "USD Coin",
"chains": 157,
"symbol": "USDC",
"peg_type": "peggedUSD",
"price_usd": 0.99973,
"top_chains": [
{
"chain": "Ethereum",
"circulating": 44954686775
},
{
"chain": "Hyperliquid L1",
"circulating": 7143862635
},
{
"chain": "Solana",
"circulating": 6786413040
},
{
"chain": "Base",
"circulating": 4465073689
},
{
"chain": "Arbitrum",
"circulating": 2273831577
}
],
"circulating": 72866575558,
"change_1d_pct": -0.36,
"change_7d_pct": -1.77,
"peg_mechanism": "fiat-backed",
"change_30d_pct": -2.11,
"peg_deviation_pct": -0.027
},
{
"name": "Ethena USDe",
"chains": 31,
"symbol": "USDe",
"peg_type": "peggedUSD",
"price_usd": 0.99918,
"top_chains": [
{
"chain": "Ethereum",
"circulating": 2451459320
},
{
"chain": "Plasma",
"circulating": 577976214
},
{
"chain": "Solana",
"circulating": 468772798
},
{
"chain": "Base",
"circulating": 391679259
},
{
"chain": "Robinhood Chain",
"circulating": 372070101
}
],
"circulating": 4740343558,
"change_1d_pct": -0.42,
"change_7d_pct": -3.39,
"peg_mechanism": "crypto-backed",
"change_30d_pct": 2.87,
"peg_deviation_pct": -0.082
},
{
"name": "World Liberty Financial USD",
"chains": 8,
"symbol": "USD1",
"peg_type": "peggedUSD",
"price_usd": 0.99924,
"top_chains": [
{
"chain": "Ethereum",
"circulating": 1502154090
},
{
"chain": "Solana",
"circulating": 1414058233
},
{
"chain": "BSC",
"circulating": 1300840240
},
{
"chain": "Aptos",
"circulating": 19684808
},
{
"chain": "Abcore",
"circulating": 18563552
}
],
"circulating": 4265392312,
"change_1d_pct": -0.25,
"change_7d_pct": -3.94,
"peg_mechanism": "fiat-backed",
"change_30d_pct": -1.09,
"peg_deviation_pct": -0.076
},
{
"name": "PayPal USD",
"chains": 19,
"symbol": "PYUSD",
"peg_type": "peggedUSD",
"price_usd": 0.9997,
"top_chains": [
{
"chain": "Ethereum",
"circulating": 1745048575
},
{
"chain": "Solana",
"circulating": 687402420
},
{
"chain": "Arbitrum",
"circulating": 360352582
},
{
"chain": "Flow",
"circulating": 69496829
},
{
"chain": "Polygon",
"circulating": 10389610
}
],
"circulating": 2874911188,
"change_1d_pct": -0.22,
"change_7d_pct": -0.68,
"peg_mechanism": "fiat-backed",
"change_30d_pct": 3.84,
"peg_deviation_pct": -0.03
},
{
"name": "Ripple USD",
"chains": 2,
"symbol": "RLUSD",
"peg_type": "peggedUSD",
"price_usd": 1.00015,
"top_chains": [
{
"chain": "Ethereum",
"circulating": 1312965497
},
{
"chain": "XRPL",
"circulating": 1110941324
}
],
"circulating": 2423906821,
"change_1d_pct": -0.95,
"change_7d_pct": -3.2,
"peg_mechanism": "fiat-backed",
"change_30d_pct": 0.03,
"peg_deviation_pct": 0.015
}
],
"total_circulating_shown": 87171129437
}
}
},
"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",
"properties": {
"q": {
"type": "string",
"description": "optional name or symbol text, e.g. usdc, dai, ethena"
},
"limit": {
"type": "string",
"description": "optional 1-50, default 10"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string",
"const": "json"
},
"example": {
"type": "object",
"required": [
"matched",
"stablecoins"
],
"properties": {
"query": {
"type": [
"string",
"null"
],
"description": "The query as the server interpreted it"
},
"source": {
"type": [
"string",
"null"
],
"description": "Data source the values come from"
},
"matched": {
"type": "number",
"description": "Number of items that matched the query"
},
"checked_at": {
"type": [
"string",
"null"
],
"description": "Time the check was run (UTC)"
},
"stablecoins": {
"type": "array",
"items": {
"type": "object",
"properties": {
"name": {
"type": "string",
"description": "Name"
},
"chains": {
"description": "Chains covered"
},
"symbol": {
"type": "string",
"description": "Ticker or asset symbol"
},
"peg_type": {
"description": "Peg type"
},
"price_usd": {
"type": [
"number",
"null"
],
"description": "Price in US dollars"
},
"top_chains": {
"type": "array",
"items": {
"type": "object"
},
"description": "Top chains"
},
"circulating": {
"type": "number"
},
"change_1d_pct": {
"description": "Change over 1 day, percent"
},
"change_7d_pct": {
"type": [
"number",
"null"
],
"description": "Change over 7 days, percent"
},
"peg_mechanism": {
"description": "Peg mechanism"
},
"change_30d_pct": {
"description": "Change over 30 days, percent"
},
"peg_deviation_pct": {
"type": [
"number",
"null"
],
"description": "Peg deviation, as a percentage"
}
}
}
},
"total_circulating_shown": {
"type": "number",
"description": "Total circulating shown"
}
}
}
}
}
}
}
},
"method": "GET",
"example": {
"query": "usd",
"source": "DefiLlama stablecoins",
"matched": 209,
"stablecoins": [
{
"name": "USD Coin",
"chains": 157,
"symbol": "USDC",
"peg_type": "peggedUSD",
"price_usd": 0.99973,
"top_chains": [
{
"chain": "Ethereum",
"circulating": 44954686775
},
{
"chain": "Hyperliquid L1",
"circulating": 7143862635
},
{
"chain": "Solana",
"circulating": 6786413040
},
{
"chain": "Base",
"circulating": 4465073689
},
{
"chain": "Arbitrum",
"circulating": 2273831577
}
],
"circulating": 72866575558,
"change_1d_pct": -0.36,
"change_7d_pct": -1.77,
"peg_mechanism": "fiat-backed",
"change_30d_pct": -2.11,
"peg_deviation_pct": -0.027
},
{
"name": "Ethena USDe",
"chains": 31,
"symbol": "USDe",
"peg_type": "peggedUSD",
"price_usd": 0.99918,
"top_chains": [
{
"chain": "Ethereum",
"circulating": 2451459320
},
{
"chain": "Plasma",
"circulating": 577976214
},
{
"chain": "Solana",
"circulating": 468772798
},
{
"chain": "Base",
"circulating": 391679259
},
{
"chain": "Robinhood Chain",
"circulating": 372070101
}
],
"circulating": 4740343558,
"change_1d_pct": -0.42,
"change_7d_pct": -3.39,
"peg_mechanism": "crypto-backed",
"change_30d_pct": 2.87,
"peg_deviation_pct": -0.082
},
{
"name": "World Liberty Financial USD",
"chains": 8,
"symbol": "USD1",
"peg_type": "peggedUSD",
"price_usd": 0.99924,
"top_chains": [
{
"chain": "Ethereum",
"circulating": 1502154090
},
{
"chain": "Solana",
"circulating": 1414058233
},
{
"chain": "BSC",
"circulating": 1300840240
},
{
"chain": "Aptos",
"circulating": 19684808
},
{
"chain": "Abcore",
"circulating": 18563552
}
],
"circulating": 4265392312,
"change_1d_pct": -0.25,
"change_7d_pct": -3.94,
"peg_mechanism": "fiat-backed",
"change_30d_pct": -1.09,
"peg_deviation_pct": -0.076
},
{
"name": "PayPal USD",
"chains": 19,
"symbol": "PYUSD",
"peg_type": "peggedUSD",
"price_usd": 0.9997,
"top_chains": [
{
"chain": "Ethereum",
"circulating": 1745048575
},
{
"chain": "Solana",
"circulating": 687402420
},
{
"chain": "Arbitrum",
"circulating": 360352582
},
{
"chain": "Flow",
"circulating": 69496829
},
{
"chain": "Polygon",
"circulating": 10389610
}
],
"circulating": 2874911188,
"change_1d_pct": -0.22,
"change_7d_pct": -0.68,
"peg_mechanism": "fiat-backed",
"change_30d_pct": 3.84,
"peg_deviation_pct": -0.03
},
{
"name": "Ripple USD",
"chains": 2,
"symbol": "RLUSD",
"peg_type": "peggedUSD",
"price_usd": 1.00015,
"top_chains": [
{
"chain": "Ethereum",
"circulating": 1312965497
},
{
"chain": "XRPL",
"circulating": 1110941324
}
],
"circulating": 2423906821,
"change_1d_pct": -0.95,
"change_7d_pct": -3.2,
"peg_mechanism": "fiat-backed",
"change_30d_pct": 0.03,
"peg_deviation_pct": 0.015
}
],
"total_circulating_shown": 87171129437
},
"license": "LicenseRef-Saylor-Agent-Use-1.0",
"mimeType": "application/json",
"freshness": "fetched live (cached up to 1 hour for large reference files)",
"tokenCount": null,
"inputSchema": {
"q": "optional name or symbol text, e.g. usdc, dai, ethena",
"limit": "optional 1-50, default 10"
},
"serviceName": "Saylor Innovations Data Desk",
"instructions": "STANDARD PATH (works with stock x402 clients): send payload.transaction — a base64 partially-signed Solana transaction — and we route verify/settle through an x402 facilitator that sponsors the fee and submits it. Include the chosen accepts entry as \"accepted\" so we can match terms. ALTERNATIVE PATH (no facilitator): Pick ONE entry from accepts and use the reference and session from THAT entry — each asset has its own. USDC or USDT: send an SPL transfer of the exact amount. Native SOL (asset=So11111111111111111111111111111111111111112, extra.native=true): send that many lamports with a system transfer. Either way include extra.reference as a read-only account (Solana Pay style), then retry with PAYMENT-SIGNATURE: base64({x402Version:2, payload:{session, reference}}). If your client cannot attach a reference, send payload.signature instead (USDC only). SOL amounts are quoted live and expire in 120s; stablecoins do not move. The facilitator path verifies and settles in this request. Only the alternative self-submitted Solana path needs retries while the transfer is indexed (typically 3-4 attempts over 10-20s). On that path, a 402 saying \"payment not found on-chain yet\" means keep retrying.",
"outputSchema": {
"type": "object",
"required": [
"matched",
"stablecoins"
],
"properties": {
"matched": {
"type": "number"
},
"stablecoins": {
"type": "array",
"items": {
"type": "object",
"properties": {
"name": {
"type": "string"
},
"symbol": {
"type": "string"
},
"price_usd": {
"type": [
"number",
"null"
]
},
"top_chains": {
"type": "array",
"items": {
"type": "object"
}
},
"circulating": {
"type": "number"
},
"change_7d_pct": {
"type": [
"number",
"null"
]
},
"peg_deviation_pct": {
"type": [
"number",
"null"
]
}
}
}
},
"total_circulating_shown": {
"type": "number"
}
}
},
"noPathTemplate": true,
"settlementModes": [
"facilitator-transaction",
"self-submitted-reference"
],
"typicalLatencyMs": 700
},
"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.
0.01USDC≈ $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
- Returns
- application/json
10000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 7LSjfr…Xacy7
- Token contract
- EPjFWd…TDt1v
- Payment window
- 2 minutes
- Returns
- application/json
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://saylorinnovations.com/api/defi/stablecoins",
"description": "",
"maxAmountRequired": "10000",
"maxTimeoutSeconds": 120
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"mimeType": "application/json",
"resource": "https://saylorinnovations.com/api/defi/stablecoins",
"description": "",
"maxAmountRequired": "10000",
"maxTimeoutSeconds": 120
}
]Provenance
- Seen in the source catalog
- 2026-10-16 17:29Z
- Last indexed by Roundhouse
- 2026-10-25 16:16Z
- Last enriched (probe, favicon, geo)
- 2026-10-19 01:45Z
- x402 version
- 1
- Max timeout
- 120s
- Liveness probe
- HTTP 402
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. 15 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 saylorinnovations.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=saylorinnovations.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://saylorinnovations.com/api/defi/stablecoins, 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.