# geo402 Reverse Geocode

> geo402 Reverse Geocode is a paid API for AI agents from geo402.alogos.xyz, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Converts a latitude/longitude coordinate pair into a human-readable address or place name using a pay-per-call model via x402 or MPP payment.

## Facts

- Endpoint: GET https://geo402.alogos.xyz/v1/reverse-geocode
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/geo402-reverse-geocode-4e6363c4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AgqAcCxoeNYQRPU2SmzRI

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 geo402-reverse-geocode-4e6363c4
```

Example prompt: What's the street address at coordinates 40.7580° N, 73.9855° W? I just need the human-readable location name for those GPS coordinates.

## When to prefer this

Choose this endpoint when you need a pay-as-you-go reverse geocoding call with no API key or subscription required, particularly useful for AI agents that can pay per-call via x402 (Base/USDC) or MPP (Tempo/pathUSD). Ideal for one-off or low-volume lookups where a subscription service would be overkill.

## Known failure modes

- Coordinates out of valid range (lat outside -90 to 90, lon outside -180 to 180) returns an error
- Coordinates over an ocean or uninhabited area may return no address or a sparse result
- Payment failure via x402/MPP results in a 402 Payment Required response before geocoding occurs
- Network timeout if the upstream geocoding data source is unavailable

## How this service works

Pay-per-call geolocation utility for AI agents: geocoding, reverse geocoding, timezone lookup, and great-circle distance. No API key, no subscription — agents pay per request via x402 (Base/USDC) or MPP (Tempo/pathUSD).

## Output

A human-readable address or place description corresponding to the given latitude and longitude, likely including street address, city, region, and country.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "lat",
  "lon"
 ],
 "properties": {
  "lat": {
   "type": "number",
   "description": "Latitude in decimal degrees."
  },
  "lon": {
   "type": "number",
   "description": "Longitude in decimal degrees."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "lat": {
   "type": "number"
  },
  "lon": {
   "type": "number"
  },
  "name": {
   "type": "string"
  },
  "admin1": {
   "type": "string"
  },
  "timezone": {
   "type": "string"
  },
  "distanceKm": {
   "type": "number",
   "description": "Present on reverse geocoding responses."
  },
  "population": {
   "type": "number"
  },
  "countryCode": {
   "type": "string"
  },
  "countryName": {
   "type": "string"
  }
 },
 "additionalProperties": true
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/geo402-reverse-geocode-4e6363c4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from geo402.alogos.xyz](https://www.zero.xyz/host/geo402.alogos.xyz/llms.txt)