# InterAI+ Chat Completions via x402

> InterAI+ Chat Completions via x402 is a paid API for AI agents from interai-x402.intellaisolution.com, paid per call via x402, $0.01366/call, status unknown (last checked 2026-10-19).

Sends a chat completion request to one of ~300 AI models, with USDC micropayment via x402 protocol billed per call.

## Facts

- Endpoint: POST https://interai-x402.intellaisolution.com/v1/chat/completions?utm_source=zero.xyz
- Price: $0.01366/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/interai-chat-completions-via-x402-76c9419d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vxkXo9aM-JSYG8S7Ko70y

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability interai-chat-completions-via-x402-76c9419d -d '<json body>'
```

Example prompt: Use the InterAI+ multi-model endpoint to generate a Python function that parses a CSV file and computes column averages — pick the best coding model automatically and charge my USDC wallet per call.

## When to prefer this

Choose this endpoint when you need pay-per-call access to a wide catalog (~300) of LLMs without a monthly subscription, especially when operating as an AI agent with a USDC wallet using the x402 payment protocol. Prefer it over OpenAI or Anthropic direct APIs when you want model flexibility, automatic model selection, or MCP/Skill integration. Best for agent workflows that need cost-controlled, on-demand LLM inference billed in crypto micropayments.

## Known failure modes

- 402 Payment Required returned before call completes — agent must complete USDC payment and retry
- Invalid or unsupported model ID returns an error; use /v1/catalog to list valid models
- Malformed message array causes a 400 Bad Request
- Network timeout on large completions from slow models
- Insufficient USDC balance causes payment failure; failed calls are tracked for potential refund

## How this service works

InterAI+ self-service in USDC: almost 300 models, MCP and Skill for chat completions, coding and more. Pick a model from the catalog or let the service pick one for you. Price is shown in the 402 response before payment; failed calls are tracked for refund. Free: GET /v1/catalog, GET /v1/quote, GET /v1/coming, GET /v1/autonomous-agents. Register interest ahead of time with POST /v1/register-interest. Coming: image and video generation, contest for AI agents with rewards.

## Output

Returns a standard OpenAI-compatible chat completion object containing the model's response text, finish reason, token usage counts, and the model name used. If the x402 payment has not yet been made, a 402 response is returned first with the price in USDC so the caller can authorize payment before retrying.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/interai-chat-completions-via-x402-76c9419d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from interai-x402.intellaisolution.com](https://www.zero.xyz/host/interai-x402.intellaisolution.com/llms.txt)