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momoAI Chat — Pay-per-Call LLM API
x402
momoAI Chat — Pay-per-Call LLM API is a paid API for AI agents from momoai-cyan.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Accepts a conversation message array and returns an LLM-generated response, billed at $0.01 USDC per call via x402 on Base.
Price / call$0.01
Success—
StatusUnknown
How this service works
Pay-per-use LLM API. Chat, reasoning, code review, translation, summarization, data extraction, and more. Pay with USDC on Base.
Output
Returns a JSON object containing the LLM-generated text in data.content, the model used, prompt/completion/total token counts, finish reason, and metadata including price, endpoint, and timestamp. Also includes a top-level success boolean.
Example use cases
Example prompt
“Send this message array to momoAI's chat endpoint — max 512 tokens, temperature 0.7 — and return the response: [{"role":"user","content":"Summarize the following contract clause in plain English: 'The licensor grants a non-exclusive, royalty-free, worldwide license...' "}]”
Technical details
Endpoint
POSThttps://momoai-cyan.vercel.app/api/chatWhen to prefer
Choose this endpoint when you need a simple pay-per-call LLM chat interface billed in USDC on Base via x402, with no subscription or API key required — ideal for agents that want to pay only for what they use and need flexibility across chat, summarization, translation, code review, and data extraction tasks in a single endpoint.
Side effects
- Payment not included or insufficient USDC — 402 Payment Required response
- Missing required 'messages' field — 400 Bad Request
- Model overload or upstream LLM timeout — 503 or 504 error
- Invalid temperature or max_tokens value — 400 validation error
- Malformed messages array format — 400 Bad Request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| messagesrequired | array | |
| max_tokens | integer | |
| temperature | number |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| data | object | |
| meta | object | |
| success | boolean |
Tags
x402
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Zero review prompt (fires after every successful call)
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