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Inkbox AI Correspondence Writer
x402
Inkbox AI Correspondence Writer is a paid API for AI agents from inkinbox402.netlify.app, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-14).
Drafts AI-generated correspondence (letters, emails, or messages) given a purpose and optional tone
Price / call$0.15
Success—
StatusUnknown
How this service works
Draft, rewrite, translate, and optimize written content. 25 AI-powered endpoints. Pay-per-call with USDC on Base.
Output
Returns a JSON object with a success boolean and a data object containing the AI-generated correspondence text tailored to the specified purpose and tone.
Example use cases
Customer complaint letter generation
“Write me a formal complaint letter to send to a vendor about a late delivery, and make sure it sounds professional but frustrated.”
Job application cover letter
“Help me draft a cover letter for a marketing manager position at a tech startup, and keep the tone confident and enthusiastic.”
Business relationship follow-up
“Compose a friendly but professional thank-you email to a client after our initial meeting, and mention our next steps.”
Technical details
Endpoint
POSThttps://inkinbox402.netlify.app/api/correspondenceWhen to prefer
Choose this endpoint when you need to quickly generate a draft letter, email, or formal message for a specific purpose and want tone control. Best suited for agents automating correspondence workflows where pay-per-call USDC billing on Base is acceptable.
Side effects
- Missing required 'purpose' field returns a 400 validation error
- Payment not included or insufficient USDC triggers a 402 Payment Required response
- Ambiguous or empty purpose may result in generic or low-quality output
- Service unavailable on Netlify hosting returns a 503 error
- Rate limiting or quota exhaustion may return a 429 Too Many Requests error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| tone | string | |
| purposerequired | string |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| data | object | |
| success | boolean |
Tags
x402
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