Fixing Cerebras 422 Error: Payload Filter Configuration in CliproxyAPI and OpenClaw
The Problem When using Cerebras models (e.g., cerebras/gpt-120b) through CliproxyAPI, you might encounter a 422 Unprocessable Entity error: { "message": "body.store: property 'body.store' is unsupported", "type": "invalid_request_error", "param": "validation_error", "code": "wrong_api_format" } This happens because Cerebras strictly validates incoming payloads and rejects any fields it doesn’t recognize — in this case, the store parameter that OpenClaw automatically includes for conversation storage. Root Cause CliproxyAPI, acting as a unified gateway for multiple LLM providers, includes standard OpenAI-compatible fields like store in every request. While most providers ignore unknown fields, Cerebras is strict and returns 422 for any unsupported parameter. ...