# Aegis Briefing Change Feed

> Aegis Briefing Change Feed is a paid API for AI agents from aegis-ai.xyz, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-16).

Returns a diff of new briefing entries added since a specified timestamp, enabling incremental consumption of Aegis AI-scored content

## Facts

- Endpoint: GET https://aegis-ai.xyz/api/d2a/briefing/changes
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/aegis-briefing-change-feed-15efc7ef
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OG208T2evpLA8XaRk4u3T

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 aegis-briefing-change-feed-15efc7ef
```

Example prompt: Check the Aegis briefing change feed for any new entries added since 2025-01-10T08:00:00Z and show me what's been added.

## When to prefer this

Use this endpoint when you need only the new or updated briefing entries since a known checkpoint timestamp, rather than fetching the entire briefing feed. Ideal for polling scenarios, incremental sync, webhook-like patterns, or agents that need to avoid reprocessing already-seen content. Prefer this over the full briefing endpoint when latency and cost efficiency matter and you already have a prior sync point.

## Known failure modes

- Missing 'since' query parameter returns a 400 or schema validation error
- Invalid or malformed ISO 8601 timestamp causes rejection
- No new entries since the timestamp returns an empty diff
- Payment not provided or invalid causes 402 Payment Required response
- Rate limiting or quota exceeded returns 429

## How this service works

Aegis briefing change feed — diffs since a given timestamp

## Output

A list of briefing additions that were published or scored after the provided timestamp, including new entries with their AI-scored V/C/L metrics and content metadata. When preview mode is enabled, returns hashes only for a free preview.

## 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"
    },
    "pathParams": {
     "type": "object"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "since"
     ],
     "properties": {
      "since": {
       "type": "string",
       "format": "date-time",
       "description": "ISO 8601 timestamp; return additions from newer briefings."
      },
      "preview": {
       "enum": [
        "true"
       ],
       "type": "string",
       "description": "Optional free hash-only preview when the deployment enables the preview tier."
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/aegis-briefing-change-feed-15efc7ef/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from aegis-ai.xyz](https://www.zero.xyz/host/aegis-ai.xyz/llms.txt)