← The evidence ledger
Evidence row 119512
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://saylorinnovations.com/api/chain/status-all
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 895f371de5ac5bce858e3d3b67dfdd214eaf4bbd66dcff2d0f5c343c3f1b7339
- Leaf
- 0x52b6a2ec67109688b57db151fbebdcd284eb5b53bbed41f5e73844ecfb7ab49e
What was observed
{
"endpoints": [
[
"x402",
"https://saylorinnovations.com/api/chain/status-all"
]
],
"name": "Saylor Innovations Data Desk",
"owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
"raw": {
"accepts": [
{
"amount": "10000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:chain-status-all",
"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"
},
"maxTimeoutSeconds": 120,
"network": "eip155:8453",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:chain-status-all",
"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"
},
"maxTimeoutSeconds": 120,
"network": "eip155:137",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:chain-status-all",
"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"
},
"maxTimeoutSeconds": 120,
"network": "eip155:42161",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb",
"memo": "saylor:datadesk:chain-status-all",
"reference": "Hu9dgMdjTGvdQzeukVSGEpwyX9uh7DUWv6th8XsMTcp2",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpjaGFpbi1zdGF0dXMtYWxsIiwicmVmZXJlbmNlIjoiSHU5ZGdNZGpUR3ZkUXpldWtWU0dFcHd5WDl1aDdEVVd2NnRoOFhzTVRjcDIiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFUGpGV2RkNUF1ZnFTU3FlTTJxTjF4enliYXBDOEc0d0VHR2tad3lURHQxdiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5MjcxODM1MjM1Nn0.RYR93Pt_o-9V5qt0OgOvy_avAWEsue-0xoQY4_MHMxc"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
"extra": {
"feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb",
"memo": "saylor:datadesk:chain-status-all",
"reference": "JBRhuJ7kXHpeGYa8bNkKczoU8gyLmT7QL8gVFPZygZGn",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpjaGFpbi1zdGF0dXMtYWxsIiwicmVmZXJlbmNlIjoiSkJSaHVKN2tYSHBlR1lhOGJOa0tjem9VOGd5TG1UN1FMOGdWRlBaeWdaR24iLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFczl2TUZyemFDRVJtSmZyRjRIMkZZRDRLQ29Oa1kxMU1jQ2U4QmVud05ZQiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5MjcxODM1MjM1Nn0.Y5T9I97G6JtswxYvfzvBLq1GXhzx0WF7YLpifpmTmNE"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "93547",
"asset": "So11111111111111111111111111111111111111112",
"extra": {
"memo": "saylor:datadesk:chain-status-all",
"native": true,
"note": "Native SOL: send lamports with a system transfer, not an SPL transfer. Price is quoted live and this quote expires in 120s.",
"quotedLamports": "96441",
"reference": "2se91qT1Lfzai6bBF9JyzYR3B99Q3THhujvXSnCAP1nt",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpjaGFpbi1zdGF0dXMtYWxsIiwicmVmZXJlbmNlIjoiMnNlOTFxVDFMZnphaTZiQkY5Snl6WVIzQjk5UTNUSGh1anZYU25DQVAxbnQiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOm51bGwsIm1pbkFtb3VudCI6OTM1NDcsImV4cCI6MTc5MjcxODM1MjM1Nn0.UJ8ggkEB0aiRHQ2ZJikXG7xC7QM-4o8P6YfsFOjiNcs",
"solUsdPrice": 103.69
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
}
],
"description": "Status board for 16 EVM chains in one call: latest block, head age, gas price and a health flag, with the slowest chain and the cheapest gas.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"type": "http"
},
"output": {
"example": {
"chains_answering": 16,
"chains_healthy": 16,
"chains_queried": 16,
"cheapest_gas_chain": "gnosis",
"elapsed_ms": 123,
"note": "A chain is healthy when its latest block is under 120 seconds old and the node answered. Gas prices are in each chain's own gwei, so cheapest_gas_chain compares gwei, not dollars.",
"results": [
{
"block_number": 26238003,
"chain": "ethereum",
"chain_id": 1,
"gas_price_gwei": 0.044381,
"head_age_seconds": 6,
"healthy": true,
"layer": "L1",
"ms": 120,
"native_symbol": "ETH",
"ok": true
},
{
"block_number": 52880306,
"chain": "base",
"chain_id": 8453,
"gas_price_gwei": 0.006,
"head_age_seconds": 2,
"healthy": true,
"layer": "L2",
"ms": 101,
"native_symbol": "ETH",
"ok": true
},
{
"block_number": 516784259,
"chain": "arbitrum",
"chain_id": 42161,
"gas_price_gwei": 0.02,
"head_age_seconds": 1,
"healthy": true,
"layer": "L2",
"ms": 110,
"native_symbol": "ETH",
"ok": true
}
],
"slowest_head_chain": "ethereum",
"source": "Chain JSON-RPC (16 EVM chains)"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"chains_answering": {
"description": "chains that answered",
"type": "number"
},
"chains_healthy": {
"description": "chains with a head under 120 seconds old",
"type": "number"
},
"chains_queried": {
"description": "chains asked",
"type": "number"
},
"cheapest_gas_chain": {
"description": "chain with the lowest gas price in gwei",
"type": [
"string",
"null"
]
},
"elapsed_ms": {
"description": "total time for all chains",
"type": "number"
},
"note": {
"description": "plain-language reading of the result",
"type": "string"
},
"results": {
"description": "one entry per chain",
"items": {
"properties": {
"block_number": {
"description": "latest block height",
"type": [
"number",
"null"
]
},
"chain": {
"description": "chain name",
"type": [
"string",
"null"
]
},
"gas_price_gwei": {
"description": "gas price in gwei",
"type": [
"number",
"null"
]
},
"head_age_seconds": {
"description": "age of the latest block",
"type": [
"number",
"null"
]
},
"healthy": {
"description": "true when head age is under 120 seconds",
"type": [
"boolean",
"null"
]
},
"layer": {
"description": "L1 or L2",
"type": [
"string",
"null"
]
},
"ok": {
"description": "false when the chain did not answer",
"type": [
"boolean",
"null"
]
}
},
"type": "object"
},
"type": [
"array",
"null"
]
},
"slowest_head_chain": {
"description": "chain with the oldest latest block",
"type": [
"string",
"null"
]
},
"source": {
"description": "where the data was read from or how it was computed",
"type": "string"
}
},
"required": [
"chains_queried",
"chains_answering",
"chains_healthy",
"results",
"note",
"source"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1792548358/bazaar-icons/bc5e2b3d111ebbef.jpg",
"lastUpdated": "2026-10-23T01:17:12.409Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-23T01:17:11.989Z"
},
"resource": "https://saylorinnovations.com/api/chain/status-all",
"serviceName": "Saylor Innovations Data Desk",
"tags": [
"chain status board",
"is chain halted",
"evm network health",
"gas price all chains",
"block height all chains"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Status board for 16 EVM chains in one call: latest block, head age, gas price and a health flag, with the slowest chain and the cheapest gas."
}What the leaf hashes
{"body":"895f371de5ac5bce858e3d3b67dfdd214eaf4bbd66dcff2d0f5c343c3f1b7339","id":119512,"kind":"listing","method":"baseline/1","observed_us":1793025615744200,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/chain/status-all","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (296695 rows).
- 0x52b66e6d98404567f89cc2a048db6a800fad858e5c8d45d0cee59a6aa4d4bfb2
- 0x72ad983419a1bd883dcabdc0c781cc8bea19160132de6cbea65661a8b302570a
- 0xc03a4a6e1a8e6a259b936c6d5a9c4a1a84f27928656c364c7a136100c34b1328
- 0x15e4d5d43b2766d14e9b7bb71244ed603b2722519fa18f6cff0d6dbb1b9eaa0b
- 0xee2b74660350695abb16cae75ff99184850ebb24fa0c95d33431501592453d1d
- 0x714d3b654df7ad7181e3566257237a32436aefd977b009387a4dff334ef4c76d
- 0x332659fe15b1ff815a7d741ada15af504693c0473ccc11c44ad107ecf156802d
- 0x42441b1d3031612f1ef877784c6fab8651a8fb4555001bf3fad2892fd8179124
- 0x66d02a06540b51be6659d2b7fbcc3bdbd49760c9d63bfc6cb0414376447ed59b
- 0xb8b1a249955b6487f765c3f074e474715f38edf3720c5c3ca9427be80aba6ea5
- 0x11ae5fc5d08fb7b25beace35e67656980e21edfc94e809110b5b9ecae306b6c8
- 0x94dd4ed7cf198df741ccda83eacc422aadb31119fc6e84c4a6d2f023453b7960
- 0xd830c52e1e8095e014510110592485afcb02b9c9a36f85653e4891a8de941246
- 0x0733993143f0230e79482cef2c38e95d98f9eafbe64a43cdc74a4545938a4167
- 0x2be1e80e065dd6b2cc75a7142be22225acd144ac975d70bf24b4f01fd76dc497
- 0x2e6a32eb32761c210560e852405e2f865f958ddbe01027894f8b9c1b3433b9f0
- 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
- 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae