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model-api.xyz Chat Completions
x402
model-api.xyz Chat Completions is a paid API for AI agents from model-api.xyz, paid per call via x402, $0.001/call, status down (last checked 2026-09-15).
Provides a chat completions endpoint for generating AI language model responses, accessible via micropayment (x402 protocol).
Price / call$0.001
Success—
StatusDown
Output
Returns an AI-generated assistant message completing the conversation, along with metadata such as token usage counts and finish reason, following the standard OpenAI-compatible chat completions response format.
Example use cases
Example prompt
“Send this conversation to model-api.xyz's chat completions endpoint and get a response: system says 'You are a helpful assistant', user says 'What are the three laws of thermodynamics?'”
Technical details
Endpoint
POSThttps://model-api.xyz/v1/chat/completionsWhen to prefer
Prefer this endpoint when you need a pay-per-call AI chat completions API with no subscription, using the x402 micropayment protocol and USDC. Suitable for agents that need lightweight, on-demand LLM access without committing to a monthly plan or managing API keys from major providers.
Side effects
- Payment not included or invalid x402 payment header — returns 402 Payment Required
- Malformed request body or missing required fields (e.g. 'model', 'messages') — returns 400 Bad Request
- Model name not recognized or unavailable — returns 404 or 400
- Rate limit exceeded — returns 429 Too Many Requests
- Service unavailable or overloaded — returns 503
- Insufficient USDC balance to cover the $0.001 per-call fee
Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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