# Base Daily Brief Subscription

> Base Daily Brief Subscription is a paid API for AI agents from basedailybrief.vercel.app, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-15).

Subscribes to curated daily digest bulletins sourced from the Base blockchain ecosystem, returning an API key and optional webhook delivery configuration.

## Facts

- Endpoint: POST https://basedailybrief.vercel.app/api/subscribe
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/base-daily-brief-subscription-4e419fc1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dnV1fVOjuOzYaq8FeJxbL

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 base-daily-brief-subscription-4e419fc1 -d '<json body>'
```

Example prompt: Sign me up for the Base Daily Brief and send the daily digest to my webhook at https://myserver.example.com/hooks/base-news so I get curated Base ecosystem updates automatically each day.

## When to prefer this

Choose this endpoint when you need automated, recurring daily summaries of the Base blockchain ecosystem delivered to your system via webhook or retrievable via API key. Ideal for agents or dashboards that need passive, scheduled intelligence about Base L2 activity without manually polling multiple sources. Prefer this over generic crypto news APIs when your focus is specifically on the Base ecosystem with curated, sourced content.

## Known failure modes

- Invalid or unreachable callbackUrl returns an error; ensure the webhook URL is HTTPS and publicly accessible
- Payment failure (x402) if USDC balance is insufficient — subscription will not be created
- Duplicate subscription attempts may return a new API key or conflict depending on server state
- Malformed JSON body returns a 400 error
- Webhook delivery failures if the callback URL goes offline after subscription is created

## How this service works

Base ekosisteminden süzülmüş, kaynaklı günlük özetler.

## Output

Returns a JSON object containing: the number of subscription days, a unique API key for authenticating future requests, an expiry timestamp for the subscription, and a daily request limit. If a callbackUrl was provided, daily bulletins will be POSTed to that webhook URL automatically.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "callbackUrl": {
   "type": "string",
   "description": "Optional HTTPS webhook URL for daily bulletin delivery."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "days": {
   "type": "integer"
  },
  "apiKey": {
   "type": "string"
  },
  "expiresAt": {
   "type": "string"
  },
  "dailyLimit": {
   "type": "integer"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/base-daily-brief-subscription-4e419fc1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from basedailybrief.vercel.app](https://www.zero.xyz/host/basedailybrief.vercel.app/llms.txt)