saylorinnovations.com
No description published for this endpoint.
The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
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:tx-explain",
"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:tx-explain",
"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:tx-explain",
"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:tx-explain",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazp0eC1leHBsYWluIiwicmVmZXJlbmNlIjoiQ2ZOQ3M5VzhUenZYRkZZUU41dDcxeGRWWE1OaEdCZVZ3RUZDNWN2UEtMYnYiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFUGpGV2RkNUF1ZnFTU3FlTTJxTjF4enliYXBDOEc0d0VHR2tad3lURHQxdiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5MjgwMTA4MTA3Nn0.BV5wFZ2fJMgjjRz06hrz32--KeD7-8ZS4yE95BEaNZQ",
"feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
"reference": "CfNCs9W8TzvXFFYQN5t71xdVXMNhGBeVwEFC5cvPKLbv"
},
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"amount": "10000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 120
},
{
"asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
"extra": {
"memo": "saylor:datadesk:tx-explain",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazp0eC1leHBsYWluIiwicmVmZXJlbmNlIjoiQlVQc0JNaXpTUzhlQWQ2SjNnMTJDNDI2VGFKUmtFeGZoRzhLRkxHRGRyemUiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFczl2TUZyemFDRVJtSmZyRjRIMkZZRDRLQ29Oa1kxMU1jQ2U4QmVud05ZQiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5MjgwMTA4MTA3Nn0.TFQyWklBrB3RQYWTvn1D2mg6zRw_4mkGHTRpuzQQbe8",
"feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
"reference": "BUPsBMizSS8eAd6J3g12C426TaJRkExfhG8KFLGDdrze"
},
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"amount": "10000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 120
},
{
"asset": "So11111111111111111111111111111111111111112",
"extra": {
"memo": "saylor:datadesk:tx-explain",
"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": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazp0eC1leHBsYWluIiwicmVmZXJlbmNlIjoiRGVSVGtSV1hSUUpucGg2VG82WFJSN0F1d2RNb2E5amt2V3AyNUROVGFmYU4iLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOm51bGwsIm1pbkFtb3VudCI6OTQ1NzcsImV4cCI6MTc5MjgwMTA4MTA3Nn0.2lUhcrZ3u2KJslk1ojDEVLYGpwi8h2GRp413Hn88SFs",
"reference": "DeRTkRWXRQJnph6To6XRR7AuwdMoa9jkvWp25DNTafaN",
"solUsdPrice": 102.56,
"quotedLamports": "97503"
},
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"amount": "94577",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 120
}
],
"resource": {
"url": "https://saylorinnovations.com/api/crypto/tx-explain?chain=ethereum&to=0xdAC17F958D2ee523a2206206994597C13D831ec7&data=0x095ea7b30000000000000000000000007a250d5630b4cf539739df2c5dacb4c659f2488dffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
"tags": [
"decode transaction calldata",
"explain evm transaction",
"unlimited approval check",
"pre-sign transaction review",
"what does this transaction do"
],
"iconUrl": "https://saylorinnovations.com/og-image.jpg",
"mimeType": "application/json",
"description": "Decode EVM calldata into plain English: ERC-20, NFT, Uniswap, Aave and permit calls, with risk flags for unlimited approvals, setApprovalForAll and proxy upgrades.",
"serviceName": "Saylor Innovations Data Desk"
},
"extensions": {
"tags": [
"decode transaction calldata",
"explain evm transaction",
"unlimited approval check",
"pre-sign transaction review",
"what does this transaction do"
],
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"to": "0xdAC17F958D2ee523a2206206994597C13D831ec7",
"data": "0x095ea7b30000000000000000000000007a250d5630b4cf539739df2c5dacb4c659f2488dffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
"chain": "ethereum"
}
},
"output": {
"type": "json",
"example": {
"to": "0xdAC17F958D2ee523a2206206994597C13D831ec7",
"note": "Decoded offline from a built-in table of common functions (ERC-20/721/1155, WETH, Uniswap V2/V3, Permit2-style permits, Aave, ownership and proxy upgrades). Unknown selectors are reported as unknown,…",
"chain": "ethereum",
"risks": [
{
"code": "unlimited_approval",
"message": "Unlimited token approval: the spender can move the entire balance now and in future. Prefer an exact amount, and revoke when done.",
"severity": "high"
}
],
"source": "Computed locally from calldata; optional public JSON-RPC read of the target address when chain is given",
"decoded": {
"args": [
"0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D",
"115792089237316195423570985008687907853269984665640564039457584007913129639935"
],
"known": true,
"label": "ERC-20/ERC-721 approve",
"risks": [
{
"code": "unlimited_approval",
"message": "Unlimited token approval: the spender can move the entire balance now and in future. Prefer an exact amount, and revoke when done.",
"severity": "high"
}
],
"spender": "0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D",
"summary": "Approves Uniswap V2 Router02 to spend UNLIMITED amounts of this token from the signer",
"function": "approve(address,uint256)",
"selector": "0x095ea7b3",
"is_revoke": false,
"unlimited": true,
"spender_label": "Uniswap V2 Router02",
"amount_base_units": "115792089237316195423570985008687907853269984665640564039457584007913129639935"
},
"summary": "Approves Uniswap V2 Router02 to spend UNLIMITED amounts of this token from the signer (to USDT (Ethereum))",
"to_kind": "contract",
"selector": "0x095ea7b3",
"to_label": "USDT (Ethereum)",
"value_wei": "0",
"risk_level": "high",
"value_native": 0,
"native_symbol": "ETH",
"known_function": true
}
}
},
"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": [
"to"
],
"properties": {
"to": {
"type": "string",
"description": "the contract or recipient address (0x...)"
},
"data": {
"type": "string",
"description": "optional calldata as 0x hex; omit for a plain transfer"
},
"chain": {
"type": "string",
"description": "optional: ethereum, base, arbitrum, optimism, polygon, bsc or avalanche; adds a contract-vs-account check on the destination"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string",
"const": "json"
},
"example": {
"type": "object",
"required": [
"value_wei",
"value_native",
"native_symbol",
"summary",
"risk_level",
"risks",
"note",
"source"
],
"properties": {
"to": {
"type": [
"string",
"null"
],
"description": "End of the range"
},
"note": {
"type": "string",
"description": "Caveat or context for reading the result"
},
"chain": {
"type": [
"string",
"null"
],
"description": "Blockchain the data is for"
},
"risks": {
"type": "array"
},
"source": {
"type": "string",
"description": "Data source the values come from"
},
"decoded": {
"type": [
"object",
"null"
]
},
"summary": {
"type": "string",
"description": "Short summary"
},
"to_kind": {
"type": [
"string",
"null"
],
"description": "To kind"
},
"selector": {
"type": [
"string",
"null"
]
},
"to_label": {
"type": [
"string",
"null"
],
"description": "To label"
},
"value_wei": {
"type": "string",
"description": "Value wei"
},
"risk_level": {
"type": "string",
"description": "Risk level"
},
"value_native": {
"type": "number",
"description": "Value native"
},
"native_symbol": {
"type": "string",
"description": "Native symbol"
},
"known_function": {
"type": [
"boolean",
"null"
],
"description": "Known function"
}
}
}
}
}
}
}
},
"method": "GET",
"example": {
"to": "0xdAC17F958D2ee523a2206206994597C13D831ec7",
"note": "Decoded offline from a built-in table of common functions (ERC-20/721/1155, WETH, Uniswap V2/V3, Permit2-style permits, Aave, ownership and proxy upgrades). Unknown selectors are reported as unknown, never guessed. A decoded call can still be harmful (for example a legitimate approve to a malicious spender): confirm the spender and amount, simulate before signing, and never sign blind.",
"chain": "ethereum",
"risks": [
{
"code": "unlimited_approval",
"message": "Unlimited token approval: the spender can move the entire balance now and in future. Prefer an exact amount, and revoke when done.",
"severity": "high"
}
],
"source": "Computed locally from calldata; optional public JSON-RPC read of the target address when chain is given",
"decoded": {
"args": [
"0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D",
"115792089237316195423570985008687907853269984665640564039457584007913129639935"
],
"known": true,
"label": "ERC-20/ERC-721 approve",
"risks": [
{
"code": "unlimited_approval",
"message": "Unlimited token approval: the spender can move the entire balance now and in future. Prefer an exact amount, and revoke when done.",
"severity": "high"
}
],
"spender": "0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D",
"summary": "Approves Uniswap V2 Router02 to spend UNLIMITED amounts of this token from the signer",
"function": "approve(address,uint256)",
"selector": "0x095ea7b3",
"is_revoke": false,
"unlimited": true,
"spender_label": "Uniswap V2 Router02",
"amount_base_units": "115792089237316195423570985008687907853269984665640564039457584007913129639935"
},
"summary": "Approves Uniswap V2 Router02 to spend UNLIMITED amounts of this token from the signer (to USDT (Ethereum))",
"to_kind": "contract",
"selector": "0x095ea7b3",
"to_label": "USDT (Ethereum)",
"value_wei": "0",
"risk_level": "high",
"value_native": 0,
"native_symbol": "ETH",
"known_function": true
},
"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": {
"to": "the contract or recipient address (0x...)",
"data": "optional calldata as 0x hex; omit for a plain transfer",
"chain": "optional: ethereum, base, arbitrum, optimism, polygon, bsc or avalanche; adds a contract-vs-account check on the destination",
"value": "optional native value in wei, default 0"
},
"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": [
"value_wei",
"value_native",
"native_symbol",
"summary",
"risk_level",
"risks",
"note",
"source"
],
"properties": {
"to": {
"type": [
"string",
"null"
]
},
"note": {
"type": "string"
},
"chain": {
"type": [
"string",
"null"
]
},
"risks": {
"type": "array"
},
"source": {
"type": "string"
},
"decoded": {
"type": [
"object",
"null"
]
},
"summary": {
"type": "string"
},
"to_kind": {
"type": [
"string",
"null"
]
},
"selector": {
"type": [
"string",
"null"
]
},
"to_label": {
"type": [
"string",
"null"
]
},
"value_wei": {
"type": "string"
},
"risk_level": {
"type": "string"
},
"value_native": {
"type": "number"
},
"native_symbol": {
"type": "string"
},
"known_function": {
"type": [
"boolean",
"null"
]
}
}
},
"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.
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
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
- 0xA2A8…fc8aa
- Token contract
- 0x3c49…c3359
- Payment window
- 2 minutes
- Returns
- application/json
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
- 0xA2A8…fc8aa
- Token contract
- 0xaf88…e5831
- Payment window
- 2 minutes
- Returns
- application/json
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
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
- Es9vMF…nwNYB
- Payment window
- 2 minutes
- Returns
- application/json
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
- So1111…11112
- 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/crypto/tx-explain",
"description": "",
"maxAmountRequired": "10000",
"maxTimeoutSeconds": 120
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"scheme": "exact",
"network": "eip155:137",
"mimeType": "application/json",
"resource": "https://saylorinnovations.com/api/crypto/tx-explain",
"description": "",
"maxAmountRequired": "10000",
"maxTimeoutSeconds": 120
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"scheme": "exact",
"network": "eip155:42161",
"mimeType": "application/json",
"resource": "https://saylorinnovations.com/api/crypto/tx-explain",
"description": "",
"maxAmountRequired": "10000",
"maxTimeoutSeconds": 120
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"mimeType": "application/json",
"resource": "https://saylorinnovations.com/api/crypto/tx-explain",
"description": "",
"maxAmountRequired": "10000",
"maxTimeoutSeconds": 120
},
{
"asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"mimeType": "application/json",
"resource": "https://saylorinnovations.com/api/crypto/tx-explain",
"description": "",
"maxAmountRequired": "10000",
"maxTimeoutSeconds": 120
},
{
"asset": "So11111111111111111111111111111111111111112",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"mimeType": "application/json",
"resource": "https://saylorinnovations.com/api/crypto/tx-explain",
"description": "",
"maxAmountRequired": "91310",
"maxTimeoutSeconds": 120
}
]Provenance
- Seen in the source catalog
- 2026-10-21 02:57Z
- Last indexed by Roundhouse
- 2026-10-23 23:45Z
- Last enriched (probe, favicon, geo)
- 2026-10-24 00:16Z
- 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. 8 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
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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/crypto/tx-explain, 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.