# Orbitwren Daily Change Log API

> Orbitwren Daily Change Log API is a paid API for AI agents from orbitwren.cybermax-tools.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-11).

Returns a paginated daily change log of updates to orbital compute and space data center project records, filterable by date and row count.

## Facts

- Endpoint: GET https://orbitwren.cybermax-tools.workers.dev/x402/api/changes?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/orbitwren-daily-change-log-api-5f1c7207
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bo4fxVmilnI7e_i6SuKuq

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 orbitwren-daily-change-log-api-5f1c7207
```

Example prompt: Pull the last 100 changes from the Orbitwren orbital compute tracker since 2025-01-01 so I can see what projects or launch statuses have been updated.

## When to prefer this

Use this endpoint when you need to detect what has changed in orbital compute and space data center project records over time — specifically for change-detection, delta monitoring, audit trails, or building incremental update pipelines. Prefer it over the project or launch list endpoints when you only care about new or modified records since a known date, not the full current state.

## Known failure modes

- Invalid date format for 'since' parameter returns a 400 error
- Limit outside 1-200 range may be rejected or clamped
- Payment not included or insufficient USDC results in 402 Payment Required
- No changes in the requested date range returns an empty array
- Upstream data source (Space Devs, CelesTrak) unavailability may cause stale or missing entries

## How this service works

Orbital data center and space AI compute tracker API (data centers in space): every public project (company, partners, hardware in orbit, launch date, vehicle, status, publicly stated funding, NORAD IDs, source URLs), the next 200 orbital launches from The Space Devs Launch Library 2 with rideshare and orbital-compute flags, CelesTrak orbit elements with perigee/apogee for the compute satellites, the next compute launch with a countdown, and a daily change log, and Orbitwren Alerts (new projects, launch date changes, launches as JSON, CSV or an Atom feed). REST + MCP server.

## Output

A JSON array of change log entries describing modifications to orbital compute project records since a given date, including updated fields such as company info, hardware status, launch dates, NORAD IDs, funding figures, and source URLs. Supports pagination via limit (1–200 rows).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "limit": {
       "type": "integer",
       "default": 50,
       "description": "Rows (1-200)"
      },
      "since": {
       "type": "string",
       "format": "date",
       "description": "Only changes on or after this date (YYYY-MM-DD)"
      }
     }
    }
   }
  },
  "output": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/orbitwren-daily-change-log-api-5f1c7207/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from orbitwren.cybermax-tools.workers.dev](https://www.zero.xyz/host/orbitwren.cybermax-tools.workers.dev/llms.txt)