# Uber H3 Hex Grid MCP

> Uber H3 Hex Grid MCP is a paid API for AI agents from api.m2mcent.com, paid per call via x402, $0.18/call, status unknown (last checked 2026-09-15).

Processes geospatial data using Uber's H3 hexagonal grid indexing system to perform hex grid operations such as encoding coordinates, resolving hex cells, and spatial analysis.

## Facts

- Endpoint: POST https://api.m2mcent.com/uber-h3-hex-grid-mcp/api/process
- Price: $0.18/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/uber-h3-hex-grid-mcp-f86d5de5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cqlvmqrpYOjiWpYc0yFmP

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 uber-h3-hex-grid-mcp-f86d5de5 -d '<json body>'
```

Example prompt: Convert the coordinates 37.7749, -122.4194 (San Francisco) to an H3 hexagonal cell index at resolution 9, and give me the neighboring hex cells too.

## When to prefer this

Choose this endpoint when you need to perform H3 hexagonal grid indexing operations — such as encoding GPS coordinates into hex cells, resolving neighbors, computing coverage grids, or doing H3-based spatial aggregation. Prefer it over generic geospatial APIs when your use case specifically requires Uber's H3 hierarchical spatial indexing system for tasks like ride-share analytics, location clustering, or hex-grid map overlays.

## Known failure modes

- Invalid or malformed coordinate values causing indexing failure
- H3 resolution out of valid range (0-15) returning an error
- Unsupported operation type in the data payload
- Malformed JSON input string causing a parse error
- Network or payment authorization failure returning HTTP 402

## How this service works

The premier global index of 1,069 monetized MCP nodes across 205 specialized subdomains. Gasless USDC runtime settlements via x402 V2 Spec on Base L2. Save 95% token context.

## Output

Returns H3 hexagonal grid computation results such as a cell index (H3 string), boundary coordinates for a hex cell, lists of neighboring cells, parent/child cell relationships, or spatial aggregation data depending on the operation requested in the input data string.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/uber-h3-hex-grid-mcp-f86d5de5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.m2mcent.com](https://www.zero.xyz/host/api.m2mcent.com/llms.txt)