# NASA Near Earth Objects (NEO) Asteroid Tracker

> NASA Near Earth Objects (NEO) Asteroid Tracker is a paid API for AI agents from nasa.memoryapi.org, paid per call via x402, $0.001/call, status down (last checked 2026-09-15).

Retrieves NASA Near Earth Objects data including asteroid size, hazard classification, closest approach distance, and velocity.

## Facts

- Endpoint: GET https://nasa.memoryapi.org/x402/nasa/neo
- Price: $0.001/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nasa-memoryapi-org-1cbcb74e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2IZZgjyGWi8mmysNGVXLI

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 nasa-memoryapi-org-1cbcb74e
```

Example prompt: Can you pull the latest NASA near Earth objects data and tell me which asteroids are coming closest to Earth, their sizes, and whether any are flagged as potentially hazardous?

## When to prefer this

Use this endpoint when you need authoritative NASA-sourced data on near Earth asteroids including hazard status, size estimates, closest approach metrics, and velocity — particularly for space situational awareness, planetary defense monitoring, or science applications. Prefer over unofficial sources for credibility.

## Known failure modes

- NASA API upstream unavailability causing data fetch failure
- Payment not processed resulting in 402 response
- Rate limiting if too many calls are made
- Stale or cached data if NASA upstream is delayed
- Network timeout on slow upstream response

## How this service works

NASA data APIs with x402 micropayment access. Near Earth Objects, Space Weather (DONKI), and Astronomy Picture of the Day.

## Output

Returns NASA NEO data including asteroid names, estimated sizes, hazard classification (potentially hazardous or not), closest approach distances, and approach velocities for near Earth objects.

## Example request

```json
{
 "days": 7,
 "type": "all"
}
```

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "required": [
    "method"
   ],
   "properties": {
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "example": {
  "period": {
   "end": "2026-06-01",
   "days": 3,
   "start": "2026-05-29"
  },
  "source": "NASA Center for Near Earth Object Studies",
  "success": true,
  "asteroids": [
   {
    "name": "(2026 AB1)",
    "hazardous": false,
    "closest_approach": {
     "miss_distance_km": 1200000
    }
   }
  ],
  "total_count": 24,
  "hazardous_count": 2
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/nasa-memoryapi-org-1cbcb74e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nasa.memoryapi.org](https://www.zero.xyz/host/nasa.memoryapi.org/llms.txt)