saylorinnovations.com
No description published for this endpoint.
OtherLiveeip155:8453Exactvia facilitator:thirdweb
Calls · 30d
2
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 15 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.
—
Calls · 30d
Upstream's own call count for this endpoint, not ours.
—
Unique payers · 30d
Never called
—
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: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",
"facilitatorOnly": true,
"assetTransferMethod": "eip3009"
},
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 120
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"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",
"facilitatorOnly": true,
"assetTransferMethod": "eip3009"
},
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"amount": "10000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 120
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"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",
"facilitatorOnly": true,
"assetTransferMethod": "eip3009"
},
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"amount": "10000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 120
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"memo": "saylor:datadesk:germany-river-le",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpnZXJtYW55LXJpdmVyLWxldmVsIiwicmVmZXJlbmNlIjoiRXhVNkxnUDl0MjdRN1A0ZXlwWEoyQ0g4SjkyQnF0RGdWWXdMRkpTdEpqZTgiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFUGpGV2RkNUF1ZnFTU3FlTTJxTjF4enliYXBDOEc0d0VHR2tad3lURHQxdiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5MjM2NTQ2MTMyMn0.WXd1ZZ0RKKIcnw-s6H0iRKX-QfAt5iKNf4SXEExYJ6g",
"feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP",
"reference": "ExU6LgP9t27Q7P4eypXJ2CH8J92BqtDgVYwLFJStJje8"
},
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"amount": "10000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 120
},
{
"asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
"extra": {
"memo": "saylor:datadesk:germany-river-le",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpnZXJtYW55LXJpdmVyLWxldmVsIiwicmVmZXJlbmNlIjoiR3JycHR4TWNjRHN2OWZ1M3NwdnQ4b3YyRUNBUWNrY3k1bVllNUV1UlRCbXMiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFczl2TUZyemFDRVJtSmZyRjRIMkZZRDRLQ29Oa1kxMU1jQ2U4QmVud05ZQiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5MjM2NTQ2MTMyMn0.BGdwh5l0TsabEmuGySExlvi6c3wci6Y3j6YNecyrJ7M",
"feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP",
"reference": "GrrptxMccDsv9fu3spvt8ov2ECAQckcy5mYe5EuRTBms"
},
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"amount": "10000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 120
},
{
"asset": "So11111111111111111111111111111111111111112",
"extra": {
"memo": "saylor:datadesk:germany-river-le",
"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": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpnZXJtYW55LXJpdmVyLWxldmVsIiwicmVmZXJlbmNlIjoiRnZZaXJodHptcHlyczFOZlQ1VG1vWVBnVTFBbjc0eFBYR0FlemU1dHhacXIiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOm51bGwsIm1pbkFtb3VudCI6OTM1MDIsImV4cCI6MTc5MjM2NTQ2MTMyMn0.-wJXkmtwV1kZFdYu_XuQDmSVhVncKmW0-4fE63EzcV0",
"reference": "FvYirhtzmpyrs1NfT5TmoYPgU1An74xPXGAeze5txZqr",
"solUsdPrice": 103.74,
"quotedLamports": "96394"
},
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"amount": "93502",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 120
}
],
"resource": {
"url": "https://saylorinnovations.com/api/water/germany/level?station=KOELN",
"tags": [
"rhine water level",
"german river gauge",
"kaub pegel",
"low water barge shipping",
"river level germany"
],
"iconUrl": "https://saylorinnovations.com/og-image.jpg",
"mimeType": "application/json",
"description": "German river water level now - Rhine, Elbe, Danube and other Pegelonline gauges in cm with mean low and high water status",
"serviceName": "Saylor Innovations Data Desk"
},
"extensions": {
"tags": [
"rhine water level",
"german river gauge",
"kaub pegel",
"low water barge shipping",
"river level germany",
"pegelonline"
],
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"station": "KOELN"
}
},
"output": {
"type": "json",
"example": {
"km": 688,
"lat": 50.936949,
"lon": 6.9633,
"name": "KÖLN",
"note": "Water level relative to the gauge zero. vs_mean_low_high compares with the long-term mean low and high water; vs_navigation_limits shows the lowest/highest navigable levels.",
"unit": "cm",
"river": "RHEIN",
"source": "WSV Pegelonline, Generaldirektion Wasserstrassen und Schifffahrt (Datenlizenz Deutschland)",
"station": "KÖLN",
"measured_at": "2026-10-16T03:30:00+02:00",
"water_level_cm": 58,
"vs_mean_low_high": "low",
"vs_navigation_limits": "normal",
"gauge_zero_m_above_sea_level": 35.038
}
}
},
"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": [
"station"
],
"properties": {
"station": {
"type": "string",
"description": "Gauge name such as KOELN, KAUB, DRESDEN, MAGDEBURG, HAMBURG"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string",
"const": "json"
},
"example": {
"type": "object",
"required": [
"station",
"water_level_cm"
],
"properties": {
"km": {
"type": [
"number",
"null"
]
},
"lat": {
"type": [
"number",
"null"
],
"description": "Latitude in decimal degrees"
},
"lon": {
"type": [
"number",
"null"
],
"description": "Longitude in decimal degrees"
},
"name": {
"type": "string",
"description": "Name"
},
"note": {
"type": "string",
"description": "Caveat or context for reading the result"
},
"unit": {
"type": "string",
"description": "Unit of measure"
},
"river": {
"type": [
"string",
"null"
]
},
"source": {
"type": "string",
"description": "Data source the values come from"
},
"station": {
"type": "string",
"description": "Observation station"
},
"measured_at": {
"type": "string",
"description": "Measured at (UTC unless a time zone is given)"
},
"water_level_cm": {
"type": "number",
"description": "Water level, in centimetres"
},
"vs_mean_low_high": {
"type": [
"string",
"null"
],
"description": "Vs mean low high"
},
"vs_navigation_limits": {
"type": [
"string",
"null"
],
"description": "Vs navigation limits"
},
"gauge_zero_m_above_sea_level": {
"type": [
"number",
"null"
],
"description": "Gauge zero m above sea level"
}
}
}
}
}
}
}
},
"method": "GET",
"example": {
"km": 688,
"lat": 50.936949,
"lon": 6.9633,
"name": "KÖLN",
"note": "Water level relative to the gauge zero. vs_mean_low_high compares with the long-term mean low and high water; vs_navigation_limits shows the lowest/highest navigable levels.",
"unit": "cm",
"river": "RHEIN",
"source": "WSV Pegelonline, Generaldirektion Wasserstrassen und Schifffahrt (Datenlizenz Deutschland)",
"station": "KÖLN",
"measured_at": "2026-10-16T03:30:00+02:00",
"water_level_cm": 58,
"vs_mean_low_high": "low",
"vs_navigation_limits": "normal",
"gauge_zero_m_above_sea_level": 35.038
},
"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": {
"station": "Gauge name such as KOELN, KAUB, DRESDEN, MAGDEBURG, HAMBURG"
},
"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": [
"station",
"water_level_cm"
],
"properties": {
"km": {
"type": [
"number",
"null"
]
},
"lat": {
"type": [
"number",
"null"
]
},
"lon": {
"type": [
"number",
"null"
]
},
"name": {
"type": "string"
},
"note": {
"type": "string"
},
"unit": {
"type": "string"
},
"river": {
"type": [
"string",
"null"
]
},
"source": {
"type": "string"
},
"station": {
"type": "string"
},
"measured_at": {
"type": "string"
},
"water_level_cm": {
"type": "number"
},
"vs_mean_low_high": {
"type": [
"string",
"null"
]
},
"vs_navigation_limits": {
"type": [
"string",
"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.
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
- Returns
- application/json
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
- 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/water/germany/level",
"description": "",
"maxAmountRequired": "10000",
"maxTimeoutSeconds": 120
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"mimeType": "application/json",
"resource": "https://saylorinnovations.com/api/water/germany/level",
"description": "",
"maxAmountRequired": "10000",
"maxTimeoutSeconds": 120
}
]Provenance
- Seen in the source catalog
- 2026-10-17 07:04Z
- Last indexed by Roundhouse
- 2026-10-25 15:16Z
- Last enriched (probe, favicon, geo)
- 2026-10-18 23:15Z
- 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. 15 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 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/water/germany/level, 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.