Build requests. Diagnose responses.

The response inspector, request builder and field checker run locally in this page. They do not make a model request or require an account. The optional site API test is separate.

Inspect a JSON response.

Find the difference between a token limit, invalid JSON and missing fields.

Runs in this browser

Paste the full Chat Completions response

Checks choices[0] in a non-streaming response. Paste the response body, not an API key. It does not reconstruct SSE or read Responses API objects.

Optional field and HTTP checks

Required top-level fieldsHTTP status, if known

Names are case-sensitive. This checks presence, not a complete schema, data types or factual correctness.

452 / 128,000 characters

Handwritten example loaded. No request was sent. Replace it with your own response to inspect that instead.

Run a handwritten example

Examples are handwritten. No model request is made.

Tool output reached the output limit

The response reports length and includes a tool payload. Its arguments may be incomplete; there is no final assistant JSON answer to validate.

Finish reason: length
Assistant JSON: Not checked
Field checklist: Not supplied

What to do next

Do not execute incomplete tool arguments. Reduce the requested output or use a supported output limit, then validate the complete tool payload in your client.

Source facts are not checked. Provider-specific finish reasons may differ.

Build your request

API base URLService model label

One connection for your software. The label free selects automatic routing; you do not choose a model provider.

Use a different endpoint with your own provider accountTask instructionsExport format

curl 'https://chinagenai.com/v1/chat/completions' \
  -H 'Authorization: Bearer YOUR_SITE_KEY' \
  -H 'Content-Type: application/json' \
  -d '{
  "model": "free",
  "messages": [
    {
      "role": "user",
      "content": "Extract the supplier quote into JSON with these fields: supplier, quantity, currency, unit_price, moq, incoterm, port, payment, lead_time_days. Use null for missing facts. Preserve currencies and units. Do not infer shipping costs or promise delivery. Return JSON only.\n\nExample only: Cedar offers 250 units at USD 5.20 each, MOQ 200, EXW Ningbo. Payment: 30% deposit, 70% before dispatch. Lead time is not stated."
    }
  ],
  "max_tokens": 256,
  "stream": false
}'

Software connection guide

This builder makes no API call. Site key issuance follows the current availability and free limits. Never include a real key in a shared request file.

Use these settings in n8n

Try the site’s free pool

Limited free pool available

Limited free API access is available. Daily and per-key concurrency limits apply.

At most 20 attempts per network or verified account per UTC day, 256 output tokens per request 1 active request per key and 2 active site requests. Failed attempts count toward safety limits. No paid fallback. Use one short item; long text and batches may exceed this output limit.

Open free key access

Check supplier-quote fields

Fictional source for the example:

Example only: Cedar offers 250 units at USD 5.20 each, MOQ 200, EXW Ningbo. Payment: 30% deposit, 70% before dispatch. Lead time is not stated.

The starting JSON is handwritten example data, not a live model response. This checker validates fields and types, not whether a model’s claims are true.

JSON to check

Text stays in this page’s memory. It is not uploaded or saved by the checker.