Index onlineMerchant portal
Api Endpoint

Saylor Innovations Great-Circle

Great-circle midpoint between two coordinates - latitude and longitude

Open interactive test console

Offering

Provider
saylorinnovations.com
Method
GET
Offering type
Api Endpoint
Transport type
http
Category
Location And Travel
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://saylorinnovations.com/api/geography/midpoint
MIME type
application/json
First seen
2026-10-16T01:51:51.176Z
Last seen
Tags
geography, midpoint, great-circle, calculator, between, distance, bearing, coordinates

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1
0.01 USDC
Atomic price: 10000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2
0.01 USDC
Atomic price: 10000 · Network: eip155:137 · Asset: USDC · Scheme: exact
Payment option 3
0.01 USDC
Atomic price: 10000 · Network: eip155:42161 · Asset: USDC · Scheme: exact
Payment option 4
0.01 USDC
Atomic price: 10000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact
Payment option 5
10000 atomic units
Atomic price: 10000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa"
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "10000",
    "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa"
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "10000",
    "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa"
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "10000",
    "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7"
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
    "amount": "10000",
    "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7"
  }
]

Observed health

Status
Healthy
Latest latency
677 ms
Average latency
651 ms
HTTP status
402
Last checked
Reachability
100% over 10 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "GET",
        "POST",
        "PUT",
        "PATCH",
        "DELETE",
        "HEAD"
      ]
    },
    "queryParams": {
      "type": "object",
      "properties": {
        "lat1": {
          "type": "string",
          "description": "required origin latitude -90 to 90 (query)"
        },
        "lon1": {
          "type": "string",
          "description": "required origin longitude -180 to 180 (query)"
        },
        "lat2": {
          "type": "string",
          "description": "required destination latitude -90 to 90 (query)"
        },
        "lon2": {
          "type": "string",
          "description": "required destination longitude -180 to 180 (query)"
        }
      },
      "required": [
        "lat1",
        "lon1",
        "lat2",
        "lon2"
      ]
    }
  },
  "required": [
    "type",
    "method",
    "queryParams"
  ],
  "additionalProperties": false
}

Output schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "json"
    },
    "description": {
      "type": "string"
    },
    "example": {
      "type": "object",
      "additionalProperties": true,
      "description": "Output fields observed in live endpoint responses; optionality and values can vary by record.",
      "properties": {
        "origin": {
          "type": "object",
          "description": "Origin of the data or item"
        },
        "destination": {
          "type": "object",
          "description": "Destination"
        },
        "midpoint": {
          "type": "object"
        },
        "formula": {
          "type": "string",
          "description": "Formula used for the calculation"
        },
        "scope_note": {
          "type": "string",
          "description": "What this data covers and what it leaves out"
        }
      },
      "required": [
        "origin",
        "destination",
        "midpoint",
        "scope_note"
      ]
    }
  },
  "required": [
    "type"
  ]
}