Saylor Innovations Data Desk
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TradingLiveeip155:8453Exactvia cdp
erc20 transfer eventsWallet token transfersToken transfer historyTransfer logs scanIncoming outgoing transfers
Calls · 30d
2
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 8 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.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-10-21 02:32Z
—
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:chain-erc20-tran",
"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:chain-erc20-tran",
"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:chain-erc20-tran",
"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:chain-erc20-tran",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpjaGFpbi1lcmMyMC10cmFuc2ZlcnMiLCJyZWZlcmVuY2UiOiJGRUVoTnoxbkQzV3cyQ0wxVmI2Z0F3a2VNNWQ4RkJ4dUc1Qml5bWR3aUFMNSIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6IkVQakZXZGQ1QXVmcVNTcWVNMnFOMXh6eWJhcEM4RzR3RUdHa1p3eVREdDF2IiwibWluQW1vdW50IjoxMDAwMCwiZXhwIjoxNzkyNTQzNjU1MzY0fQ.BSDsiy2iPRejId9A8qL5p6G0wmUVa_V8rwyCtdtkvEc",
"feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
"reference": "FEEhNz1nD3Ww2CL1Vb6gAwkeM5d8FBxuG5BiymdwiAL5"
},
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"amount": "10000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 120
},
{
"asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
"extra": {
"memo": "saylor:datadesk:chain-erc20-tran",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpjaGFpbi1lcmMyMC10cmFuc2ZlcnMiLCJyZWZlcmVuY2UiOiJ4NEF3b0gyYURlTnRZTkZGejk2aDdCUVY1NTlnOWFQM2t1UUdrR1hRREZRIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRXM5dk1GcnphQ0VSbUpmckY0SDJGWUQ0S0NvTmtZMTFNY0NlOEJlbndOWUIiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTI1NDM2NTUzNjR9.cqWYwZWFnQFmvmqKyCZKyDP40TzgCZCWi1Gekp1i7WA",
"feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
"reference": "x4AwoH2aDeNtYNFFz96h7BQV559g9aP3kuQGkGXQDFQ"
},
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"amount": "10000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 120
},
{
"asset": "So11111111111111111111111111111111111111112",
"extra": {
"memo": "saylor:datadesk:chain-erc20-tran",
"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": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpjaGFpbi1lcmMyMC10cmFuc2ZlcnMiLCJyZWZlcmVuY2UiOiJEdWFjYm1OZW9md0o5c1pkdldZdU45aU13MlhlcUdWclVNNXB0dDU1NWE2byIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6bnVsbCwibWluQW1vdW50Ijo5MDkwOCwiZXhwIjoxNzkyNTQzNjU1MzY0fQ.3O_ex5bHPhuD9GuBq8N823FCenaLRLEpOj_RLdCaO3c",
"reference": "DuacbmNeofwJ9sZdvWYuN9iMw2XeqGVrUM5ptt555a6o",
"solUsdPrice": 106.7,
"quotedLamports": "93720"
},
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"amount": "90908",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 120
}
],
"resource": {
"url": "https://saylorinnovations.com/api/chain/erc20-transfers?chain=base&token=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&blocks=200&limit=5",
"tags": [
"erc20 transfer events",
"wallet token transfers",
"token transfer history",
"transfer logs scan",
"incoming outgoing transfers"
],
"iconUrl": "https://saylorinnovations.com/og-image.jpg",
"mimeType": "application/json",
"description": "Recent ERC-20 Transfer events for a token or wallet on 16 EVM chains, incoming or outgoing, decimal-scaled, newest first, no indexer needed.",
"serviceName": "Saylor Innovations Data Desk"
},
"extensions": {
"tags": [
"erc20 transfer events",
"wallet token transfers",
"token transfer history",
"transfer logs scan",
"incoming outgoing transfers"
],
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"chain": "base",
"limit": "5",
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"blocks": "200"
}
},
"output": {
"type": "json",
"example": {
"note": "Scans a bounded window of recent blocks straight from chain RPC (no indexer), newest first. For older history pass to_block and blocks. ERC-721 transfers are excluded.",
"chain": "base",
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"source": "Chain JSON-RPC (base)",
"wallet": null,
"chain_id": 8453,
"returned": 5,
"to_block": 52872876,
"direction": null,
"transfers": [
{
"to": "0x4e962bb3889bf030368f56810a9c96b83cb3e778",
"from": "0x1a91463eb4ce91d85c612b0c35fdab9460c5d2b7",
"token": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"amount": "283792.885598",
"symbol": "USDC",
"tx_hash": "0xbcf7463fe6fd144090c96a451a1770754345b57cbfb48f5917f93c584c205680",
"log_index": 772,
"amount_raw": "283792885598",
"block_number": 52872876
},
{
"to": "0xb2cc224c1c9fee385f8ad6a55b4d94e92359dc59",
"from": "0x787fd1dc3b533171781e4ae1a563c1ac7b4435e4",
"token": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"amount": "375817.001331",
"symbol": "USDC",
"tx_hash": "0x6227889c02424f5cf5ff8038d11bfe61a0a6a8f962acbb92067b51cc70a23377",
"log_index": 761,
"amount_raw": "375817001331",
"block_number": 52872876
},
{
"to": "0xb2cc224c1c9fee385f8ad6a55b4d94e92359dc59",
"from": "0xb093da272a66d47b7445ca389cebdc6d3ac7753d",
"token": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"amount": "210717.519792",
"symbol": "USDC",
"tx_hash": "0x370e838b5d0b3eacf620e4acd5043e1f17b7ac0c2f695f2614b239f1e915deef",
"log_index": 736,
"amount_raw": "210717519792",
"block_number": 52872876
}
],
"truncated": true,
"from_block": 52872677,
"total_matches": 15836,
"blocks_scanned": 200,
"window_auto_reduced": false
}
}
},
"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": [
"chain"
],
"properties": {
"chain": {
"type": "string",
"description": "chain name (ethereum, base, arbitrum, optimism, polygon, bsc, avalanche, gnosis, linea, scroll, mantle, blast, sonic, celo, berachain, unichain) or chain id"
},
"limit": {
"type": "string",
"description": "rows to return, 1 to 100 (default 25)"
},
"token": {
"type": "string",
"description": "optional ERC-20 contract address"
},
"blocks": {
"type": "string",
"description": "how many blocks to scan back, 1 to 10000 (default 2000)"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string",
"const": "json"
},
"example": {
"type": "object",
"required": [
"chain",
"chain_id",
"from_block",
"to_block",
"total_matches",
"returned",
"transfers",
"source"
],
"properties": {
"note": {
"type": "string",
"description": "scan scope and limits"
},
"chain": {
"type": "string",
"description": "the chain name that was queried"
},
"token": {
"type": [
"string",
"null"
],
"description": "token filter used, if any"
},
"source": {
"type": "string",
"description": "where the data was read from"
},
"wallet": {
"type": [
"string",
"null"
],
"description": "wallet filter used, if any"
},
"chain_id": {
"type": "number",
"description": "EIP-155 chain id of that network"
},
"returned": {
"type": "number",
"description": "rows in this response"
},
"to_block": {
"type": "number",
"description": "last block scanned"
},
"direction": {
"type": [
"string",
"null"
],
"description": "in, out or both when a wallet was given"
},
"transfers": {
"type": "array",
"description": "newest first: block_number, tx_hash, log_index, token, from, to, amount_raw, symbol, amount"
},
"truncated": {
"type": "boolean",
"description": "true when more matches exist than limit"
},
"from_block": {
"type": "number",
"description": "first block scanned"
},
"total_matches": {
"type": "number",
"description": "ERC-20 transfers found in the window"
},
"blocks_scanned": {
"type": "number",
"description": "number of blocks covered"
},
"window_auto_reduced": {
"type": "boolean",
"description": "true when the node refused the window and it was narrowed"
}
}
}
}
}
}
}
},
"method": "GET",
"example": {
"note": "Scans a bounded window of recent blocks straight from chain RPC (no indexer), newest first. For older history pass to_block and blocks. ERC-721 transfers are excluded.",
"chain": "base",
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"source": "Chain JSON-RPC (base)",
"wallet": null,
"chain_id": 8453,
"returned": 5,
"to_block": 52872876,
"direction": null,
"transfers": [
{
"to": "0x4e962bb3889bf030368f56810a9c96b83cb3e778",
"from": "0x1a91463eb4ce91d85c612b0c35fdab9460c5d2b7",
"token": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"amount": "283792.885598",
"symbol": "USDC",
"tx_hash": "0xbcf7463fe6fd144090c96a451a1770754345b57cbfb48f5917f93c584c205680",
"log_index": 772,
"amount_raw": "283792885598",
"block_number": 52872876
},
{
"to": "0xb2cc224c1c9fee385f8ad6a55b4d94e92359dc59",
"from": "0x787fd1dc3b533171781e4ae1a563c1ac7b4435e4",
"token": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"amount": "375817.001331",
"symbol": "USDC",
"tx_hash": "0x6227889c02424f5cf5ff8038d11bfe61a0a6a8f962acbb92067b51cc70a23377",
"log_index": 761,
"amount_raw": "375817001331",
"block_number": 52872876
},
{
"to": "0xb2cc224c1c9fee385f8ad6a55b4d94e92359dc59",
"from": "0xb093da272a66d47b7445ca389cebdc6d3ac7753d",
"token": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"amount": "210717.519792",
"symbol": "USDC",
"tx_hash": "0x370e838b5d0b3eacf620e4acd5043e1f17b7ac0c2f695f2614b239f1e915deef",
"log_index": 736,
"amount_raw": "210717519792",
"block_number": 52872876
},
{
"to": "0xd58e261e60200256d7033555196c8295f547111f",
"from": "0x1d7f97d26ae2c01f9b01fc252b73cf0db3397e95",
"token": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"amount": "0.34756",
"symbol": "USDC",
"tx_hash": "0xce50777298ab5446221ec894ea0dba1f47d5536fcbf095b43ec62c71c26ec2dc",
"log_index": 734,
"amount_raw": "347560",
"block_number": 52872876
},
{
"to": "0xd52a9faddcd2bbc19c210fe8c9f877d6f724e5c9",
"from": "0xd3bf4e4a9ca1f31a6f501bb33dcd5168576a5f70",
"token": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"amount": "0.502872",
"symbol": "USDC",
"tx_hash": "0x7ec221f61b8b315520ef225ee64d9e638a50ab309e136236e036111850c5f97b",
"log_index": 726,
"amount_raw": "502872",
"block_number": 52872876
}
],
"truncated": true,
"from_block": 52872677,
"total_matches": 15836,
"blocks_scanned": 200,
"window_auto_reduced": false
},
"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": {
"chain": "chain name (ethereum, base, arbitrum, optimism, polygon, bsc, avalanche, gnosis, linea, scroll, mantle, blast, sonic, celo, berachain, unichain) or chain id",
"limit": "rows to return, 1 to 100 (default 25)",
"token": "optional ERC-20 contract address",
"blocks": "how many blocks to scan back, 1 to 10000 (default 2000)",
"wallet": "optional wallet address (provide a token, a wallet, or both)",
"to_block": "optional end block (default latest)",
"direction": "with wallet: in, out or both (default both)"
},
"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": [
"chain",
"chain_id",
"from_block",
"to_block",
"total_matches",
"returned",
"transfers",
"source"
],
"properties": {
"note": {
"type": "string",
"description": "scan scope and limits"
},
"chain": {
"type": "string",
"description": "the chain name that was queried"
},
"token": {
"type": [
"string",
"null"
],
"description": "token filter used, if any"
},
"source": {
"type": "string",
"description": "where the data was read from"
},
"wallet": {
"type": [
"string",
"null"
],
"description": "wallet filter used, if any"
},
"chain_id": {
"type": "number",
"description": "EIP-155 chain id of that network"
},
"returned": {
"type": "number",
"description": "rows in this response"
},
"to_block": {
"type": "number",
"description": "last block scanned"
},
"direction": {
"type": [
"string",
"null"
],
"description": "in, out or both when a wallet was given"
},
"transfers": {
"type": "array",
"description": "newest first: block_number, tx_hash, log_index, token, from, to, amount_raw, symbol, amount"
},
"truncated": {
"type": "boolean",
"description": "true when more matches exist than limit"
},
"from_block": {
"type": "number",
"description": "first block scanned"
},
"total_matches": {
"type": "number",
"description": "ERC-20 transfers found in the window"
},
"blocks_scanned": {
"type": "number",
"description": "number of blocks covered"
},
"window_auto_reduced": {
"type": "boolean",
"description": "true when the node refused the window and it was narrowed"
}
}
},
"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
10000units
on Polygon · 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
- 0xA2A8…fc8aa
- Token contract
- 0x3c49…c3359
- Payment window
- 2 minutes
10000units
on Arbitrum · 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
- 0xA2A8…fc8aa
- Token contract
- 0xaf88…e5831
- Payment window
- 2 minutes
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
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
- Es9vMF…nwNYB
- Payment window
- 2 minutes
91466units
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
- So1111…11112
- Payment window
- 2 minutes
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"memo": "saylor:datadesk:chain-erc20-tran",
"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:chain-erc20-tran",
"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:chain-erc20-tran",
"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:chain-erc20-tran",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpjaGFpbi1lcmMyMC10cmFuc2ZlcnMiLCJyZWZlcmVuY2UiOiJiWWZCdHBLdnB1UkVvWlVBSjllaERuTE5GbVI4czZFU05UdUpTTmEzYnVxIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRVBqRldkZDVBdWZxU1NxZU0ycU4xeHp5YmFwQzhHNHdFR0drWnd5VER0MXYiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTI1NTAwNTI4ODJ9.j7iuAbqqbpX9AKD5V2PmZ_lEBUPFjjFSoNIOCucXDoI",
"feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP",
"reference": "bYfBtpKvpuREoZUAJ9ehDnLNFmR8s6ESNTuJSNa3buq"
},
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"amount": "10000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 120
},
{
"asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
"extra": {
"memo": "saylor:datadesk:chain-erc20-tran",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpjaGFpbi1lcmMyMC10cmFuc2ZlcnMiLCJyZWZlcmVuY2UiOiJDdWJwbnllWEhaNXlhS3pYOHA2TVA3dUdRdDNwN1hxQWlGWkMzRG5DYW5adyIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6IkVzOXZNRnJ6YUNFUm1KZnJGNEgyRllENEtDb05rWTExTWNDZThCZW53TllCIiwibWluQW1vdW50IjoxMDAwMCwiZXhwIjoxNzkyNTUwMDUyODgyfQ.67QSfTxjAUtSCFQzUpAQYgq7-HPmVpCU-Ev_kjmxqJ8",
"feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP",
"reference": "CubpnyeXHZ5yaKzX8p6MP7uGQt3p7XqAiFZC3DnCanZw"
},
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"amount": "10000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 120
},
{
"asset": "So11111111111111111111111111111111111111112",
"extra": {
"memo": "saylor:datadesk:chain-erc20-tran",
"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": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpjaGFpbi1lcmMyMC10cmFuc2ZlcnMiLCJyZWZlcmVuY2UiOiJIdzh5RXR4VE1zSmE5Qjl2VmZoTkFNbVFLcmF0aHNCQWFRVkxrM29WOFpBYSIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6bnVsbCwibWluQW1vdW50Ijo5MTQ2NiwiZXhwIjoxNzkyNTUwMDUyODgyfQ.92SxhgsXo0ozbEn4ovBDtxon-rtfgZL8Bjhp7aewlhc",
"reference": "Hw8yEtxTMsJa9B9vVfhNAMmQKrathsBAaQVLk3oV8ZAa",
"solUsdPrice": 106.05,
"quotedLamports": "94295"
},
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"amount": "91466",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 120
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"chain": "base",
"limit": "5",
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"blocks": "200"
}
},
"output": {
"type": "json",
"example": {
"note": "Scans a bounded window of recent blocks straight from chain RPC (no indexer), newest first. For older history pass to_block and blocks. ERC-721 transfers are excluded.",
"chain": "base",
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"source": "Chain JSON-RPC (base)",
"wallet": null,
"chain_id": 8453,
"returned": 5,
"to_block": 52872876,
"direction": null,
"transfers": [
{
"to": "0x4e962bb3889bf030368f56810a9c96b83cb3e778",
"from": "0x1a91463eb4ce91d85c612b0c35fdab9460c5d2b7",
"token": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"amount": "283792.885598",
"symbol": "USDC",
"tx_hash": "0xbcf7463fe6fd144090c96a451a1770754345b57cbfb48f5917f93c584c205680",
"log_index": 772,
"amount_raw": "283792885598",
"block_number": 52872876
},
{
"to": "0xb2cc224c1c9fee385f8ad6a55b4d94e92359dc59",
"from": "0x787fd1dc3b533171781e4ae1a563c1ac7b4435e4",
"token": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"amount": "375817.001331",
"symbol": "USDC",
"tx_hash": "0x6227889c02424f5cf5ff8038d11bfe61a0a6a8f962acbb92067b51cc70a23377",
"log_index": 761,
"amount_raw": "375817001331",
"block_number": 52872876
},
{
"to": "0xb2cc224c1c9fee385f8ad6a55b4d94e92359dc59",
"from": "0xb093da272a66d47b7445ca389cebdc6d3ac7753d",
"token": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"amount": "210717.519792",
"symbol": "USDC",
"tx_hash": "0x370e838b5d0b3eacf620e4acd5043e1f17b7ac0c2f695f2614b239f1e915deef",
"log_index": 736,
"amount_raw": "210717519792",
"block_number": 52872876
}
],
"truncated": true,
"from_block": 52872677,
"total_matches": 15836,
"blocks_scanned": 200,
"window_auto_reduced": false
}
}
},
"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": [
"chain"
],
"properties": {
"chain": {
"type": "string",
"description": "chain name (ethereum, base, arbitrum, optimism, polygon, bsc, avalanche, gnosis, linea, scroll, mantle, blast, sonic, celo, berachain, unichain) or chain id"
},
"limit": {
"type": "string",
"description": "rows to return, 1 to 100 (default 25)"
},
"token": {
"type": "string",
"description": "optional ERC-20 contract address"
},
"blocks": {
"type": "string",
"description": "how many blocks to scan back, 1 to 10000 (default 2000)"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string",
"const": "json"
},
"example": {
"type": "object",
"required": [
"chain",
"chain_id",
"from_block",
"to_block",
"total_matches",
"returned",
"transfers",
"source"
],
"properties": {
"note": {
"type": "string",
"description": "scan scope and limits"
},
"chain": {
"type": "string",
"description": "the chain name that was queried"
},
"token": {
"type": [
"string",
"null"
],
"description": "token filter used, if any"
},
"source": {
"type": "string",
"description": "where the data was read from"
},
"wallet": {
"type": [
"string",
"null"
],
"description": "wallet filter used, if any"
},
"chain_id": {
"type": "number",
"description": "EIP-155 chain id of that network"
},
"returned": {
"type": "number",
"description": "rows in this response"
},
"to_block": {
"type": "number",
"description": "last block scanned"
},
"direction": {
"type": [
"string",
"null"
],
"description": "in, out or both when a wallet was given"
},
"transfers": {
"type": "array",
"description": "newest first: block_number, tx_hash, log_index, token, from, to, amount_raw, symbol, amount"
},
"truncated": {
"type": "boolean",
"description": "true when more matches exist than limit"
},
"from_block": {
"type": "number",
"description": "first block scanned"
},
"total_matches": {
"type": "number",
"description": "ERC-20 transfers found in the window"
},
"blocks_scanned": {
"type": "number",
"description": "number of blocks covered"
},
"window_auto_reduced": {
"type": "boolean",
"description": "true when the node refused the window and it was narrowed"
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-21 02:32Z
- Last indexed by Roundhouse
- 2026-10-26 17:40Z
- Last enriched (probe, favicon, geo)
- 2026-10-21 00:45Z
- x402 version
- 2
- 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.
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/chain/erc20-transfers, 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.