# Newsletter Length and Paragraph Profile

> Newsletter Length and Paragraph Profile is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).

Analyzes a newsletter's Markdown or plain text to produce a deterministic length and paragraph structure profile.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-sector-writing-newsletter-length-profile?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/newsletter-length-and-paragraph-profile-adbfd9fb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_g4D4JGo16aF0ps97JOw_B

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 newsletter-length-and-paragraph-profile-adbfd9fb -d '<json body>'
```

Example prompt: Can you analyze the length and paragraph structure of my newsletter draft and give me a profile? Here's the text: '## Introduction
Welcome to our monthly update...

## Updates
This month we shipped three new features...

## Call to Action
Sign up now to get early access.'

## When to prefer this

Choose this endpoint when you need a fast, deterministic structural analysis of a newsletter document — specifically length and paragraph metrics — without any generative AI rewriting or fact-checking. Ideal when auditing newsletter drafts for consistency, comparing editions, or validating document structure before publishing. Prefer this over general-purpose LLM analysis when you need reproducible, rule-based output rather than interpreted summaries.

## Known failure modes

- Input text exceeds 20,000 character limit — request is rejected
- Empty or missing text field — profile cannot be generated
- Malformed Markdown that cannot be parsed into sections — may result in incomplete section breakdown
- Payment failure via x402 protocol — request not processed

## How this service works

Newsletter - Length and paragraph profile: Length and paragraph profile for Newsletter. Supplied Markdown or plain text, up to 20,000 characters. Deterministic processing and document templates; no generative prose or fact checking. One of 25 profiles or calculations across 20 shared operations in this sector. 0.01 USDC includes one bounded length and paragraph profile deliverable.

## Output

Returns a deterministic length and paragraph profile for the submitted newsletter text, including metrics such as total character count, paragraph count, section breakdown, and structural layout details. No generative prose or fact-checking is performed — output is purely analytical and based on the supplied document.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "default": "## Introduction\nExample 1 content.\nTODO: review the supplied document by 2026-10-10.\n\n## Updates\nExample 2 content.\nTODO: review the supplied document by 2026-10-10.\n\n## Call to action\nExample 3 content.\nTODO: review the supplied document by 2026-10-10.",
   "maxLength": 20000
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/newsletter-length-and-paragraph-profile-adbfd9fb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)