---
title: "Generate structured JSON response"
method: POST
path: "/generate-object"
tags: ["Generation"]
---

# Generate structured JSON response

`POST /generate-object`

Generates structured JSON response from Claude CLI. The schema is passed in the request to instruct Claude to output valid JSON.

## Request body

- object
  - `system` string
  - `prompt` string, required
  - `schema` object, required
  - `sessionId` string
  - `maxTokens` number
  - `model` string
  - `userEmail` string, email

## Response `200`

Successful object generation

- object
  - `object` unknown
  - `rawText` string, required
  - `usage` object, required
    - `inputTokens` number, required
    - `outputTokens` number, required
    - `totalTokens` number, required
  - `sessionId` string, required

## Other responses

- `400` — Validation error
- `401` — Missing authorization header
- `403` — Invalid API key
- `500` — Internal server error or CLI error

## Changes

- **2025-12-24** `62c4085e0ca0` — 3 breaking, 10 warning, 6 info
  - the `usage/inputTokens` response's property type changed from `integer` to `number` for status `200`
  - the `usage/outputTokens` response's property type changed from `integer` to `number` for status `200`
  - the `usage/totalTokens` response's property type changed from `integer` to `number` for status `200`
  - removed the request property `allowedTools`
  - …15 more

[Change history](https://skmtc.dev/pattern-zones-co/apis/koine-gateway-api/changes/generate-object/post.md)

---

[API](https://skmtc.dev/pattern-zones-co/apis/koine-gateway-api.md) · [All operations](https://skmtc.dev/pattern-zones-co/apis/koine-gateway-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/pattern-zones-co/koine-gateway-api/revisions/7db75cb15a4e/schema)