## Json

**post** `/generate/json`

Fetches URL content, extracts data, and transforms it using AI based on custom instructions. Use this to generate new content, summaries, or restructured data.

### Body Parameters

- `instructions: string`

  Instructions describing how to transform the data

- `json_schema: unknown`

  JSON schema defining the structure of the transformed output

- `url: string`

  URL to fetch content from

- `effort: optional "min" or "standard" or "max"`

  Fetch effort level controlling speed vs. capability tradeoff. "min": fastest, no fallback (1-5s). "standard": balanced with enhanced reliability (default, 3-15s). "max": full browser rendering for JS-heavy sites (15-60s).

  - `"min"`

  - `"standard"`

  - `"max"`

- `geo_target: optional object { country }`

  Optional geotargeting parameters for proxy requests

  - `country: optional string`

    Country code using ISO 3166-1 alpha-2 standard (2 letters, e.g., "US", "GB", "JP").
    See: https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2

- `nocache: optional boolean`

  Bypass cache and force fresh data retrieval

### Example

```http
curl https://api.tabstack.ai/v1/generate/json \
    -H 'Content-Type: application/json' \
    -H "Authorization: Bearer $TABSTACK_API_KEY" \
    -d "{
          \"instructions\": \"For each story, categorize it (tech/business/science/other) and write a one-sentence summary explaining what it's about in simple terms.\",
          \"json_schema\": {
            \"properties\": {
              \"summaries\": {
                \"items\": {
                  \"properties\": {
                    \"category\": {
                      \"description\": \"Story category (tech/business/science/etc)\",
                      \"type\": \"string\"
                    },
                    \"summary\": {
                      \"description\": \"One-sentence summary of the story\",
                      \"type\": \"string\"
                    },
                    \"title\": {
                      \"description\": \"Story title\",
                      \"type\": \"string\"
                    }
                  },
                  \"type\": \"object\"
                },
                \"type\": \"array\"
              }
            },
            \"type\": \"object\"
          },
          \"url\": \"https://news.ycombinator.com\",
          \"effort\": \"standard\"
        }"
```