ot-intel-api.onrender.com
Checks whether a tank/vessel reported level change is physically consistent with its metered flow-in/flow-out via conservation of mass. Pass asset_id, flow_in, flow_out, level_start, level_end, dt_seconds (>0), tank_area (>0), optional noise_floor (default 0.5). Fully deterministic, no LLM, no trained model. Inspired by Barbhaya et al. 2025 physical-invariant residual check — flags inconsistency and direction, does not assert a specific cause.
The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
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.
Pay 0.2 USDC on Base to 0x1888…C767B. The signed payment is good for 5 minutes.
- Paid to
- 0x1888…C767B
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 200000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x1888192FAc6a69e4cd7d078eC4bCf6F24f7C767B",
"amount": "200000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"flow_in": "50",
"asset_id": "TANK_302",
"flow_out": "40",
"level_end": "120",
"tank_area": "10",
"dt_seconds": "60",
"level_start": "100"
}
},
"output": {
"type": "json",
"example": {
"method": "mass_balance_v1",
"asset_id": "TANK_302",
"data_sources": [
"caller_supplied_telemetry"
],
"suspicion_score": 100,
"residual_direction": "FLOW_EXCEEDS_MEASURED_LEVEL_CHANGE",
"mass_balance_residual": 400,
"possible_explanations": [
"Level sensor under-reporting (fault or spoofing)",
"Unmetered outflow — leak or diversion downstream of the flow meters"
],
"physical_invariant_violation": 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": [
"asset_id",
"flow_in",
"flow_out",
"level_start",
"level_end",
"dt_seconds",
"tank_area"
],
"properties": {
"flow_in": {
"type": "string",
"description": "Metered inflow rate (numeric string)"
},
"asset_id": {
"type": "string",
"description": "Identifier for the tank/vessel being checked"
},
"flow_out": {
"type": "string",
"description": "Metered outflow rate (numeric string)"
},
"level_end": {
"type": "string",
"description": "Level reading at end of interval (numeric string)"
},
"tank_area": {
"type": "string",
"description": "Cross-sectional area, must be > 0 (numeric string)"
},
"dt_seconds": {
"type": "string",
"description": "Interval duration in seconds, must be > 0 (numeric string)"
},
"level_start": {
"type": "string",
"description": "Level reading at start of interval (numeric string)"
},
"noise_floor": {
"type": "string",
"description": "Residual magnitude below which reading is treated as consistent, default 0.5 (numeric string)"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-08-07 14:28Z
- Last indexed by Roundhouse
- 2026-09-06 14:30Z
- Last enriched (probe, favicon, geo)
- 2026-09-11 03:45Z
- x402 version
- 2
- Max timeout
- 300s
- 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. 13 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 ot-intel-api.onrender.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=ot-intel-api.onrender.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://ot-intel-api.onrender.com/ot/physics/invariant-reachability, 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. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.