# Local Rank Tracker Grid Coordinate Calculator

> Local Rank Tracker Grid Coordinate Calculator is a paid API for AI agents from x402.openwebninja.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).

Generates a grid of geographic coordinate points centered on a location for local SEO rank tracking across a configurable area

## Facts

- Endpoint: GET https://x402.openwebninja.com/local-rank-tracker/calculate-grid-coordinates
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/local-rank-tracker-grid-coordinate-calculator-af90b84b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BtksRxYGJYiB-xZyY_gFo

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability local-rank-tracker-grid-coordinate-calculator-af90b84b
```

Example prompt: Generate a 5x5 geo-grid of coordinate points centered on latitude 37.341759, longitude -121.938314 with a 2 km radius so I can track local search rankings across that area.

## When to prefer this

Use this endpoint when you need to generate a structured geographic grid of lat/lng points around a center coordinate for local SEO rank tracking workflows. It is specifically designed for local rank tracker tools that need evenly distributed sampling points within a radius, supporting configurable odd-numbered grid sizes from 3x3 to 15x15.

## Known failure modes

- Missing required query parameters (lat, lng, grid_size, radius) returns a 400 error
- Invalid grid_size value not in enum [3,5,7,9,11,13,15] returns a validation error
- Out-of-range latitude or longitude values may cause unexpected results or errors
- Payment not provided or insufficient USDC balance returns a 402 Payment Required
- Rate limiting may cause intermittent failures at high call volumes

## How this service works

40+ public web-data, SERP, e-commerce, real-estate, finance and AI-search APIs, payable per call over x402 (USDC on Base, Polygon, Arbitrum). No account or API key required. Most endpoints $0.003; AI-model endpoints $0.005.

## Output

Returns an array of latitude/longitude coordinate objects, each tagged with row-column indices, forming a grid pattern centered on the input location. Also includes echoed request parameters and a unique request ID for tracking.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "required": {
   "type": "string"
  },
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {}
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/local-rank-tracker-grid-coordinate-calculator-af90b84b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.openwebninja.com](https://www.zero.xyz/host/x402.openwebninja.com/llms.txt)