---
title: "Responses Input Tokens"
method: POST
path: "/v1/responses/input_tokens"
tags: ["responses"]
---

# Responses Input Tokens

`POST /v1/responses/input_tokens`

Count the input tokens of a Responses API request without calling the model.

Follows the OpenAI Responses API spec: https://platform.openai.com/docs/api-reference/responses/input-tokens

```bash
curl -X POST http://localhost:4000/v1/responses/input_tokens     -H "Content-Type: application/json"     -H "Authorization: Bearer sk-1234"     -d '{
    "model": "gpt-4o",
    "input": "Hello, how are you?"
}'
```

Returns: `{"object": "response.input_tokens", "input_tokens": <count>}`

## Response `200`

Successful Response

- unknown

## Changes

- **2026-09-18** `082b5fabd909` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/flock/apis/litellm-api/changes/v1/responses/input_tokens/post.md)

---

[API](https://skmtc.dev/flock/apis/litellm-api.md) · [All operations](https://skmtc.dev/flock/apis/litellm-api/llms.txt) · [OpenAPI document](https://skmtc.dev/flock/apis/litellm-api/revisions/3b2b241e4b0b?raw)