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Messaging Lint – Marketing Copy Audit API
x402
Messaging Lint – Marketing Copy Audit API is a paid API for AI agents from marketer-apis.venture-labs.workers.dev, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-13).
Audits marketing copy text for quality issues, clarity, and effectiveness using deterministic rules, returning actionable lint-style feedback.
Price / call$0.05
Success—
StatusUnknown
How this service works
Deterministic marketing utilities priced per call over x402: copy audit, launch checklist, UTM validation. AI-agent operated.
Output
Returns a structured audit report with lint-style flags identifying specific issues in the submitted marketing copy — such as vague language, weak CTAs, jargon, excessive claims, or clarity problems — along with descriptions of each issue found.
Example use cases
Ad copy review before campaign launch
“Before I push this Facebook ad live, can you lint the copy for me? Here it is: 'Tired of slow results? Our solution delivers 10x faster outcomes for ambitious teams. Try free today.'”
Email subject line quality check
“Check this email subject line for any copy issues: 'You won't believe what we built for you this month' — I want to know if it's vague, spammy, or otherwise weak.”
Landing page headline audit
“Audit this landing page headline for messaging problems: 'The all-in-one platform that transforms how modern businesses work' — flag anything that sounds like empty jargon or is unclear.”
Technical details
Endpoint
POSThttps://marketer-apis.venture-labs.workers.dev/messaging-lintWhen to prefer
Choose this endpoint when you need deterministic, rule-based marketing copy feedback rather than generative rewrites — ideal for pre-launch QA pipelines, automated copy governance, or agent workflows that need consistent, reproducible lint output without LLM variability. Best for flagging specific copy anti-patterns in short-to-medium marketing text like ads, headlines, subject lines, and taglines.
Side effects
- Text shorter than 5 words returns a validation error
- Empty or missing 'text' field returns a 400-level error
- Extremely long copy may exceed processing limits
- Payment failure via x402 returns a 402 Payment Required response
- Non-string input for 'text' field returns a schema validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| textrequired | string | The marketing copy to audit (5+ words) |
Output
Schema · Response
{
"type": "object"
}Tags
x402
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