Saylor Innovations Fluid Flow:

Name: Saylor Innovations Fluid Flow:
Price: 0.01 USDC
Availability: InStock

Pipe velocity, Reynolds number, friction, pressure drop, pump power, Torricelli speed and buoyancy

OtherLiveeip155:8453Exactvia cdp

https://saylorinnovations.com/api/physics/fluids

PhysicsAstronomyKinematicsOrbitHeat

Settlements · 30d

1,649↑ 29%

No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.

$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

Last called 2026-10-26 08:09Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa

The 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.",
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      "extra": {
        "memo": "saylor:physics:fluids",
        "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"
      },
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    {
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      "extra": {
        "memo": "saylor:physics:fluids",
        "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"
      },
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    {
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      "extra": {
        "memo": "saylor:physics:fluids",
        "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"
      },
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      "scheme": "exact",
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      "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
      "amount": "10000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
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    {
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      "amount": "10000",
      "scheme": "exact",
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    },
    {
      "asset": "So11111111111111111111111111111111111111112",
      "extra": {
        "memo": "saylor:physics:fluids",
        "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": "eyJhcnRpY2xlSWQiOiJwaHlzaWNzOmZsdWlkcyIsInJlZmVyZW5jZSI6Ijg4TG5pdFRoQ0NxQmJTcUJBQ0dhdzRUamRVUXYxbzNkajRFc01iV0VXRHhuIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjpudWxsLCJtaW5BbW91bnQiOjk2MTQzLCJleHAiOjE3OTMwMjI0OTIxNDB9.cW3HQ0P_8i43vrwJbvFKPPuMmKKhZKdXpCgY0B7t30c",
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  ],
  "resource": {
    "url": "https://saylorinnovations.com/api/physics/fluids",
    "tags": [
      "physics",
      "astronomy",
      "kinematics",
      "orbit",
      "heat"
    ],
    "iconUrl": "https://saylorinnovations.com/og-image.jpg",
    "mimeType": "application/json",
    "description": "Pipe velocity, Reynolds number, friction, pressure drop, pump power, Torricelli speed and buoyancy",
    "serviceName": "Saylor Innovations  Fluid Flow:"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "fluid": "water",
            "flow_lpm": "60",
            "length_m": "40",
            "diameter_mm": "25",
            "tank_head_m": "2",
            "roughness_mm": "0.0015",
            "height_gain_m": "3",
            "object_density": "700",
            "object_volume_l": "20",
            "pump_efficiency_percent": "55"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "pressure_drop_kpa": 69.4
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
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        "properties": {
          "input": {
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            "required": [
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              "method"
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            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
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                ],
                "type": "string"
              },
              "queryParams": {
                "type": "object",
                "required": [
                  "diameter_mm",
                  "flow_lpm"
                ],
                "properties": {
                  "fluid": {
                    "type": "string",
                    "description": "optional water, seawater, oil, air, glycol, milk default water (query)"
                  },
                  "flow_lpm": {
                    "type": "string",
                    "description": "required flow rate in liters per minute (query)"
                  },
                  "length_m": {
                    "type": "string",
                    "description": "optional pipe length in m, default 10 (query)"
                  },
                  "diameter_mm": {
                    "type": "string",
                    "description": "required inside pipe diameter in mm (query)"
                  },
                  "tank_head_m": {
                    "type": "string",
                    "description": "optional height of fluid above an outlet for Torricelli speed (query)"
                  },
                  "roughness_mm": {
                    "type": "string",
                    "description": "optional absolute roughness, default 0.0015 for plastic (steel 0.045, concrete 0.3) (query)"
                  },
                  "height_gain_m": {
                    "type": "string",
                    "description": "optional elevation gain from inlet to outlet in m, default 0 (query)"
                  },
                  "object_density": {
                    "type": "string",
                    "description": "optional density of an object in kg/m3 for buoyancy (query)"
                  },
                  "object_volume_l": {
                    "type": "string",
                    "description": "optional object volume in liters (query)"
                  },
                  "pump_efficiency_percent": {
                    "type": "string",
                    "description": "optional pump efficiency, default 60 (query)"
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "json"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    },
    "method": "GET",
    "example": {
      "pressure_drop_kpa": 69.4
    },
    "license": "Saylor calculation; standard physics formulas, assumptions disclosed",
    "mimeType": "application/json",
    "freshness": "computed per request",
    "tokenCount": null,
    "description": "Pipe flow and fluid statics: from the pipe diameter and flow rate the velocity, the Reynolds number and flow regime (laminar, transitional, turbulent), the Darcy friction factor (Swamee-Jain or 64/Re), the pressure drop and head loss over a pipe length with a roughness value, the pump power needed with an efficiency, the static pressure of a fluid column, the Bernoulli exit pressure between two points of different height and diameter, the Torricelli outflow speed from a tank, and the buoyancy force with the fraction of an object that floats submerged.",
    "inputSchema": {
      "fluid": "optional water, seawater, oil, air, glycol, milk default water (query)",
      "flow_lpm": "required flow rate in liters per minute (query)",
      "length_m": "optional pipe length in m, default 10 (query)",
      "diameter_mm": "required inside pipe diameter in mm (query)",
      "tank_head_m": "optional height of fluid above an outlet for Torricelli speed (query)",
      "roughness_mm": "optional absolute roughness, default 0.0015 for plastic (steel 0.045, concrete 0.3) (query)",
      "height_gain_m": "optional elevation gain from inlet to outlet in m, default 0 (query)",
      "object_density": "optional density of an object in kg/m3 for buoyancy (query)",
      "object_volume_l": "optional object volume in liters (query)",
      "pump_efficiency_percent": "optional pump efficiency, default 60 (query)"
    },
    "serviceName": "Saylor Innovations — Fluid Flow: Pipe Pressure Drop, Reynolds Number, Bernoulli and Buoyancy",
    "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"
    },
    "noPathTemplate": true,
    "settlementModes": [
      "facilitator-transaction",
      "self-submitted-reference"
    ],
    "typicalLatencyMs": 30
  },
  "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

10000units

on Polygon · exact scheme