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ApexAPI Grammar Checker
x402
ApexAPI Grammar Checker is a paid API for AI agents from apex-api-gamma.vercel.app, paid per call via x402, $0.184005/call, status unknown (last checked 2026-09-14).
Checks and corrects grammar in a given text input, returning grammar errors and/or corrected text
Price / call$0.184005
Success—
StatusUnknown
How this service works
Crypto, AI, Social Media, Finance, Weather, Tools & more. Pay per call in USDC on Base. No API keys.
Output
Returns a response object containing grammar analysis of the input text, likely including corrected text, identified grammatical errors, and/or improvement suggestions.
Example use cases
Email draft cleanup before sending
“Before I send this email to my manager, can you check the grammar and fix any errors? Here's what I wrote: 'We has completed the project ahead of schedule and the team are ready for the next phase of work.'”
Social media caption quality check
“I want to post this on LinkedIn but want to make sure it sounds professional. Can you proofread this for grammar mistakes: 'Our company have been leading innovations in the space, and we're excited to share our findings with everyone.'”
Customer message content validation
“I'm sending this message to a client and I want to be grammatically correct. Can you check this and fix it: 'The documents you requested is attached, please review them and let me know if you need any clarifications.'”
Technical details
Endpoint
POSThttps://apex-api-gamma.vercel.app/api/ai/grammarWhen to prefer
Use this endpoint when you need a quick, pay-per-call grammar check without setting up API keys or subscriptions. Ideal for agents that occasionally need to proofread user-generated content, drafts, or messages and want to pay only for what they use via USDC on Base.
Side effects
- Empty or missing query string returns an error
- Very long text may exceed input limits
- Payment failure (402) if USDC balance is insufficient
- Non-English text may produce inaccurate results
- Ambiguous text may not yield clear corrections
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| query | string | Search query or input parameter |
Output
Schema · Response
{
"type": "object",
"description": "API response data"
}Tags
x402
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