← The evidence ledger
Evidence row 120022
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://saylorinnovations.com/api/hydro/germany
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 27f9b6ecfcacc89f7d1ec8d7aee7c1202de4f84e93ad20f976d6d0c36fdbd09d
- Leaf
- 0xf162e6489cdb22e728771c9d8cdb1b6b1363ea044876ea341cce740200dd2934
What was observed
{
"endpoints": [
[
"x402",
"https://saylorinnovations.com/api/hydro/germany"
]
],
"name": "Saylor Innovations Data Desk",
"owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
"raw": {
"accepts": [
{
"amount": "10000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:germany-river-le",
"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:germany-river-le",
"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:germany-river-le",
"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": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP",
"memo": "saylor:datadesk:germany-river-le",
"reference": "5r7iBEszcS44dgLf7KWbNnKbMgD9ZBCEFwG9dBnaJQs2",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpnZXJtYW55LXJpdmVyLWxldmVscyIsInJlZmVyZW5jZSI6IjVyN2lCRXN6Y1M0NGRnTGY3S1diTm5LYk1nRDlaQkNFRndHOWRCbmFKUXMyIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRVBqRldkZDVBdWZxU1NxZU0ycU4xeHp5YmFwQzhHNHdFR0drWnd5VER0MXYiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTI3MTEzNzEzODB9.oJg6pKhoF9z9Qb7k0X3fePeaLJghoPggauwV80L8u1w"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
"extra": {
"feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP",
"memo": "saylor:datadesk:germany-river-le",
"reference": "3psvNWtCgZrstjuisiCNMK1fmvGAcGJMY37Fo1ijsLXZ",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpnZXJtYW55LXJpdmVyLWxldmVscyIsInJlZmVyZW5jZSI6IjNwc3ZOV3RDZ1pyc3RqdWlzaUNOTUsxZm12R0FjR0pNWTM3Rm8xaWpzTFhaIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRXM5dk1GcnphQ0VSbUpmckY0SDJGWUQ0S0NvTmtZMTFNY0NlOEJlbndOWUIiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTI3MTEzNzEzODB9.pk4xFn5V7Kv11hdXkgk5Yu2Q22U_WETZNL5B2S_B50s"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "93909",
"asset": "So11111111111111111111111111111111111111112",
"extra": {
"memo": "saylor:datadesk:germany-river-le",
"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": "96814",
"reference": "7Hx7c1rrEh2yVXftYxNb2pJ5yufCk6YTHnW4iQ6mMsmB",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpnZXJtYW55LXJpdmVyLWxldmVscyIsInJlZmVyZW5jZSI6IjdIeDdjMXJyRWgyeVZYZnRZeE5iMnBKNXl1ZkNrNllUSG5XNGlRNm1Nc21CIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjpudWxsLCJtaW5BbW91bnQiOjkzOTA5LCJleHAiOjE3OTI3MTEzNzEzODB9.VNZOI9zwqMt8u3uLxCqd7FeSC1g9X-f-4SzBWX4upMU",
"solUsdPrice": 103.29
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
}
],
"description": "German river gauge readings from PEGELONLINE - water level in cm, discharge, position by river kilometre and status against mean and flood marks",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"limit": "5",
"water": "RHEIN"
},
"type": "http"
},
"output": {
"example": {
"count": 5,
"note": "Water level in cm above each gauge zero (not comparable between gauges); vs_ fields compare with mean low/high water and flood marks.",
"source": "WSV PEGELONLINE, German Federal Waterways and Shipping Administration (DL-DE-Zero)",
"stations": [
{
"discharge_m3s": null,
"km": 0.5,
"lat": 47.667889,
"lon": 9.172858,
"measured": "2026-10-17T12:45:00+02:00",
"river": "RHEIN",
"station": "KONSTANZ-RHEIN",
"vs_flood_marks": "unknown",
"vs_mean_low_high": "unknown",
"water_level_cm": 231
},
{
"discharge_m3s": null,
"km": 164.3,
"lat": 47.559486,
"lon": 7.616666,
"measured": "2026-10-17T12:40:00+02:00",
"river": "RHEIN",
"station": "BASEL-RHEINHALLE",
"vs_flood_marks": "normal",
"vs_mean_low_high": "unknown",
"water_level_cm": 484
},
{
"discharge_m3s": 39.3,
"km": 186.2,
"lat": 47.711059,
"lon": 7.529275,
"measured": "2026-10-17T12:45:00+02:00",
"river": "RHEIN",
"station": "RHEINWEILER",
"vs_flood_marks": "unknown",
"vs_mean_low_high": "normal",
"water_level_cm": 197
},
{
"discharge_m3s": null,
"km": 227.6,
"lat": 48.043211,
"lon": 7.57257,
"measured": "2026-10-17T12:45:00+02:00",
"river": "RHEIN",
"station": "BREISACH",
"vs_flood_marks": "unknown",
"vs_mean_low_high": "unknown",
"water_level_cm": 184
},
{
"discharge_m3s": null,
"km": 254.2,
"lat": 48.257469,
"lon": 7.682373,
"measured": "2026-10-17T12:45:00+02:00",
"river": "RHEIN",
"station": "RUST",
"vs_flood_marks": "unknown",
"vs_mean_low_high": "unknown",
"water_level_cm": 80
}
],
"stations_above_normal": 0,
"stations_with_data": 36,
"water": "RHEIN"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"limit": {
"description": "optional 1-60, default 12",
"type": "string"
},
"water": {
"description": "optional river name in capitals, default RHEIN (e.g. ELBE, DONAU, MOSEL)",
"type": "string"
}
},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"count": {
"description": "Number of items returned",
"type": "number"
},
"note": {
"description": "Caveat or context for reading the result",
"type": "string"
},
"source": {
"description": "Data source the values come from",
"type": "string"
},
"stations": {
"description": "Stations",
"items": {
"properties": {
"discharge_m3s": {
"description": "Discharge m3s"
},
"km": {
"description": "Position along the river in kilometres",
"type": [
"number",
"null"
]
},
"lat": {
"description": "Latitude in decimal degrees"
},
"lon": {
"description": "Longitude in decimal degrees"
},
"measured": {
"description": "Time of the measurement",
"type": [
"string",
"null"
]
},
"river": {
"description": "River name",
"type": [
"string",
"null"
]
},
"station": {
"description": "Observation station"
},
"vs_flood_marks": {
"description": "Vs flood marks"
},
"vs_mean_low_high": {
"description": "Vs mean low high"
},
"water_level_cm": {
"description": "Water level, in centimetres"
}
},
"type": "object"
},
"type": "array"
},
"stations_above_normal": {
"description": "Stations above normal",
"type": "number"
},
"stations_with_data": {
"description": "Stations with data",
"type": "number"
},
"water": {
"description": "River or waterway queried",
"type": "string"
}
},
"required": [
"water",
"stations"
],
"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/v1791811517/bazaar-icons/bc5e2b3d111ebbef.jpg",
"lastUpdated": "2026-10-22T23:20:51.418Z",
"quality": {
"l30DaysTotalCalls": 3,
"l30DaysUniquePayers": 3,
"lastCalledAt": "2026-10-22T23:20:50.851Z"
},
"resource": "https://saylorinnovations.com/api/hydro/germany",
"serviceName": "Saylor Innovations Data Desk",
"tags": [
"rhine water level now",
"german river gauge readings",
"is the elbe flooding",
"low water on the rhine",
"pegel konstanz current level"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "German river gauge readings from PEGELONLINE - water level in cm, discharge, position by river kilometre and status against mean and flood marks"
}What the leaf hashes
{"body":"27f9b6ecfcacc89f7d1ec8d7aee7c1202de4f84e93ad20f976d6d0c36fdbd09d","id":120022,"kind":"listing","method":"baseline/1","observed_us":1793025617100045,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/hydro/germany","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).
- 0xf162ebaf2b0b14707d961ae87b967947a3247d6ae02c10be1b1eea0b6a0f9697
- 0xf5cfbe7f76ade702e5641706f1382459f0ad1f33888d4ad7f80218d037ed49c3
- 0x1e2b25c9dbc30ab6e51600f3fb7a718700e7d036a217190f6b8146e6b6cb498b
- 0x5d886fdd7deee4b6113ae6c65d24871c2f1fc1df1273dbd023e5a6d87b090e7f
- 0x4ab38b6f825d1f8fd104ee04c5a14c454a97fbf9fc23a3f6c8c6c28125f0c911
- 0x8a2bbe1593c8ba7dc0c3a60e177b385f894f76ee2202f1d768071663d162a161
- 0x02b3eca943cbd600a10a1f0442313c1304ea5d75aa6cc280c6405d058558c522
- 0x6eb82cd8774fa76b4f14a3cb225ddf4caf045dc5e7abd1fd27b44c21342fe82d
- 0x46613c0a42d561a7a07ec88601367eb9190899add6946bf0d246502a841548b6
- 0x1374d43b83adaf6956b75a4ffa6be9b5d88f279b0e1f9aa9cb997253f28541e1
- 0x3fbb508bb3373d829808c4b964e49bf52f1a8877acba747d2b92b5eac81e6259
- 0x4d2e94451b5ffc570a23dee9d1525bc305f1009994ffe23d8e2e7d45c60f6209
- 0xa26f0437cba4d7d64f1cf98bf4f490e1ebb6f66a5e2331537b7ba8b3061084e0
- 0xd769d41500075835c3b2f9184d223699fb983fd05c29fbcb44d964abc7ee380d
- 0x68d296b1e00b4899fb83c3fba36fffaefa311eac2903067dbebfe776a12b4a9a
- 0x5fb5dda563336cd1bc1b9f44c52b76237ae72ed2145cb9290f39f304ca7dd678
- 0x74a0a08e4e7ab9aa5bfbead33dec7e1c7e8e364cff69a63720d764bbe987aadc
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae