# Tempest AI Content Engine — Newsletter Roundup Generator

> Tempest AI Content Engine — Newsletter Roundup Generator is a paid API for AI agents from trempest.vercel.app, paid per call via x402, $0.3/call, status unknown (last checked 2026-09-14).

Generates a structured newsletter roundup on a given topic, tailored to a specified audience, tone, and desired sections.

## Facts

- Endpoint: POST https://trempest.vercel.app/api/roundup
- Price: $0.3/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tempest-ai-content-engine-newsletter-roundup-generator-c03dc623
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ckZDrqkf-YI5FGBlGp--X

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 tempest-ai-content-engine-newsletter-roundup-generator-c03dc623 -d '<json body>'
```

Example prompt: Can you generate a weekly newsletter roundup about the latest trends in generative AI, aimed at startup founders, using an informative but conversational tone, with sections for top news, tool spotlight, and a quick tip?

## When to prefer this

Choose this endpoint when you need to programmatically generate structured newsletter roundup content at scale, especially when tone, audience, and section structure must be customizable per call. It is best suited for automated content pipelines, newsletter platforms, or agents that need to produce ready-to-send digest emails without manual editing. Prefer this over generic LLM completions when you want a pay-per-call model with consistent newsletter-specific output formatting.

## Known failure modes

- Missing required 'topic' field returns a validation error
- Overly vague topic may produce generic or low-quality output
- Unsupported tone descriptors may be ignored or default to neutral
- Very long sections arrays may result in incomplete or truncated content
- Payment failure via x402/USDC results in a 402 Payment Required error

## How this service works

Compose, rewrite, translate, and refine content at scale. 25 AI-powered endpoints. Pay-per-call with USDC on Tempo.

## Output

Returns a JSON object with a success boolean and a data object containing the generated newsletter roundup, structured according to the requested sections, topic, tone, and audience.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "topic"
 ],
 "properties": {
  "tone": {
   "type": "string",
   "description": "Tone"
  },
  "topic": {
   "type": "string",
   "description": "Newsletter topic"
  },
  "audience": {
   "type": "string",
   "description": "Target audience"
  },
  "sections": {
   "type": "array",
   "description": "Desired sections"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "data": {
   "type": "object"
  },
  "success": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tempest-ai-content-engine-newsletter-roundup-generator-c03dc623/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from trempest.vercel.app](https://www.zero.xyz/host/trempest.vercel.app/llms.txt)