Saylor Innovations Data Desk
EVM block lookup for 16 chains by number, hash or tag: header, gas used, base fee, miner, size, transaction count and the transaction hashes.
DataLiveeip155:8453Exactvia cdp
Block by numberEth getblockbynumberBlock header detailsBlock transaction hashesLatest block info
Calls · 30d
2
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 6 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 2026-10-22 17:47Z
—
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
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
93539units
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-block",
"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-block",
"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-block",
"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-block",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpjaGFpbi1ibG9jayIsInJlZmVyZW5jZSI6IjJ1NmVOZDZIZ3h4NnhySFpUMm11Zm1iUXRVdURnVWYxTE1wYnFxa2k0cnViIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRVBqRldkZDVBdWZxU1NxZU0ycU4xeHp5YmFwQzhHNHdFR0drWnd5VER0MXYiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTI2OTEzNzYzNTh9.CQg_0og2DQQ2mSyV-tnx7GMkI-dWX2dXJ_efpCC9a-M",
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
"reference": "2u6eNd6Hgxx6xrHZT2mufmbQtUuDgUf1LMpbqqki4rub"
},
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"amount": "10000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 120
},
{
"asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
"extra": {
"memo": "saylor:datadesk:chain-block",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpjaGFpbi1ibG9jayIsInJlZmVyZW5jZSI6Ikd4RmdYZ051dXpGZWZyYlJwMmhiRHg3QmZkZXBrTmMxZjFTaHZqdHQ1VzFtIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRXM5dk1GcnphQ0VSbUpmckY0SDJGWUQ0S0NvTmtZMTFNY0NlOEJlbndOWUIiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTI2OTEzNzYzNTh9.Avwl4tu5v8NqNldPS0pdeZbjvhoKEJUqfwLwNsk3S10",
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
"reference": "GxFgXgNuuzFefrbRp2hbDx7BfdepkNc1f1Shvjtt5W1m"
},
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"amount": "10000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 120
},
{
"asset": "So11111111111111111111111111111111111111112",
"extra": {
"memo": "saylor:datadesk:chain-block",
"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": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpjaGFpbi1ibG9jayIsInJlZmVyZW5jZSI6IjlMZXkxTjVvaXdtak1SR20xRlg4c3BidEFxVFYzeUtDOXRKTDNwS3djc2o1IiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjpudWxsLCJtaW5BbW91bnQiOjkzNTM5LCJleHAiOjE3OTI2OTEzNzYzNTh9.uQWwX3YWZcRwfBeUe3pc14WmUC-8EVgbPN13dU7Qf1Q",
"reference": "9Ley1N5oiwmjMRGm1FX8spbtAqTV3yKC9tJL3pKwcsj5",
"solUsdPrice": 103.7,
"quotedLamports": "96432"
},
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"amount": "93539",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 120
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"block": "latest",
"chain": "ethereum"
}
},
"output": {
"type": "json",
"example": {
"hash": "0x1f7d3a5d80e2d78aa94ed1d92dd838339214792a0aa8750b98cbc8a883789e70",
"chain": "ethereum",
"miner": "0x4838b106fce9647bdf1e7877bf73ce8b0bad5f97",
"source": "Chain JSON-RPC (ethereum)",
"chain_id": 1,
"gas_used": 14066719,
"tx_count": 198,
"gas_limit": 60000000,
"timestamp": "2026-10-21T02:23:35.000Z",
"size_bytes": 69445,
"age_seconds": 5,
"parent_hash": "0xf4082490a0e5f995ab62f6f5d9a6aeff60e9b37a73c7afb06da92ef5e7b87a75",
"block_number": 26237958,
"fullness_pct": 23.44,
"transactions": [
"0x7dbdb5eebfb594e8271c0de665cf2f29e21075b15d803f8d9e5dae9df0f8e95c",
"0x990246d1cfeda150e672ae0ef6caf55bb672c996b39ca736a5baa957847d2d3d",
"0xf738dc70448779ee086bf9f34e3073a8561e1601d16122a6da0a1d3f079631e8"
],
"base_fee_gwei": 0.043347,
"withdrawals_count": 16,
"transactions_truncated": 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": [
"chain"
],
"properties": {
"block": {
"type": "string",
"description": "optional block number (decimal or 0x hex), 0x block hash, or latest, safe, finalized (default latest)"
},
"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"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string",
"const": "json"
},
"example": {
"type": "object",
"required": [
"chain",
"chain_id",
"block_number",
"hash",
"timestamp",
"tx_count",
"source"
],
"properties": {
"hash": {
"type": "string",
"description": "block hash"
},
"note": {
"description": "plain-language reading of the result"
},
"chain": {
"type": "string",
"description": "the chain name that was queried"
},
"miner": {
"type": [
"string",
"null"
],
"description": "fee recipient or validator address"
},
"source": {
"type": "string",
"description": "where the data was read from"
},
"chain_id": {
"type": "number",
"description": "EIP-155 chain id of that network"
},
"gas_used": {
"type": "number",
"description": "gas used by the block"
},
"tx_count": {
"type": "number",
"description": "transactions in the block"
},
"gas_limit": {
"type": "number",
"description": "block gas limit"
},
"timestamp": {
"type": "string",
"description": "block time in UTC"
},
"size_bytes": {
"type": [
"number",
"null"
],
"description": "block size in bytes"
},
"age_seconds": {
"type": "number",
"description": "seconds since the block was produced"
},
"parent_hash": {
"type": "string",
"description": "hash of the previous block"
},
"block_number": {
"type": "number",
"description": "block height"
},
"fullness_pct": {
"type": [
"number",
"null"
],
"description": "share of the gas limit used"
},
"transactions": {
"type": [
"array",
"null"
],
"description": "first 100 transaction hashes"
},
"base_fee_gwei": {
"type": [
"number",
"null"
],
"description": "base fee per gas in gwei"
},
"withdrawals_count": {
"type": [
"number",
"null"
],
"description": "validator withdrawals in the block"
},
"transactions_truncated": {
"type": "boolean",
"description": "true when more than 100 transactions exist"
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-22 17:47Z
- Last indexed by Roundhouse
- 2026-10-26 17:40Z
- Last enriched (probe, favicon, geo)
- 2026-10-21 04:45Z
- 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. 6 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/block, 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.