# Newsletter Term Coverage Checker

> Newsletter Term Coverage Checker 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).

Scans supplied newsletter text and identifies all occurrences of user-specified terms, returning deterministic coverage results without generative prose.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-sector-writing-newsletter-term-coverage?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-term-coverage-checker-f28c4e11
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bM4Xz94zsU1RqqCP3t3BL

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-term-coverage-checker-f28c4e11 -d '<json body>'
```

Example prompt: Can you scan my newsletter draft for coverage of the terms 'subscription', 'discount', and 'renewal' — here's the full text: [paste newsletter Markdown]?

## When to prefer this

Choose this endpoint when you need a fast, deterministic audit of whether specific terms appear in a newsletter document — particularly for compliance checks, editorial QA, or brand consistency reviews. It is not a generative endpoint and will not rewrite or summarize content; prefer it over LLM-based analysis when reproducibility and exact matching matter.

## Known failure modes

- Text exceeds 20,000 character limit — request rejected
- Terms array is empty or missing — validation error
- Individual term exceeds 80 characters — validation error
- More than 20 terms supplied — request rejected
- Non-string or malformed input in terms array — error returned

## How this service works

Newsletter - Supplied-term coverage: Supplied-term coverage 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 supplied-term coverage deliverable.

## Output

A deterministic report identifying which of the supplied terms appear in the newsletter text, where they occur, and a coverage summary — produced from document template processing with no generative prose or AI-fabricated content.

## 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
  },
  "terms": {
   "type": "array",
   "items": {
    "type": "string",
    "default": "",
    "maxLength": 80,
    "minLength": 1
   },
   "default": [
    "review",
    "example"
   ],
   "maxItems": 20,
   "minItems": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/newsletter-term-coverage-checker-f28c4e11/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)