The only proxy that repairs broken JSON in flight. Trailing commas, unquoted keys, and markdown fences are fixed token-by-token before they reach your code. Works with LangChain, Vercel AI SDK, and LlamaIndex.
Copy this now, it won't be shown again.
{"id": "chat_1", "role": "assista
// Stream truncated mid-string
{"id": "chat_1", "role": "assistant"}
// Automatically closed & valid
Post-processing can't fix streaming JSON. We repair it token-by-token.
JSON is fixed as it streams. Your client receives valid tokens in real-time, not after the stream ends.
Trailing commas, unquoted keys, and markdown fences fixed on-the-fly with sub-ms overhead.
Auto-closes open objects and arrays when streams stop unexpectedly or hit token limits.
Validates output against your JSON Schema. Re-prompts automatically on failure.
We are a passthrough proxy. Your prompts and completions are processed in memory for repair and immediately discarded. We never log your content or train models on it.
Works with any client that supports a custom base_url. No logic changes needed.
Solve validation errors when streaming with Instructor. 3 solutions with code examples.
Model reliability data from 672 tests. Production setup guide for multi-provider JSON.
8 common error types with copy-paste regex fixes. 95.5% are markdown fences.
Perfect for testing and small projects.
Scale as needed. 1 credit = 1 repair req.