---
title: "Summarize file content"
method: POST
path: "/ai/summarize"
tags: ["Chat"]
---

# Summarize file content

`POST /ai/summarize`

Generate a summary of a file's contents. 

 Supports the following text formats: 
- PDF, HTML, txt, json, csv

 Supports the following media formats (billed for both the transcription and summary): 
- flac, mp3, mp4, mpeg, mpga, m4a, ogg, wav, or webm
- Up to 100 MB

## Headers

- `Idempotency-Key` string

## Request body

- SummaryRequest
  - `bucket` string, required — The name of the bucket that contains the file to be summarized.
  - `filename` string, required — The name of the file to be summarized.
  - `system_prompt` string — A system prompt to guide the summary generation.

## Response `200`

Successful Response

- SummaryResponseData
  - `data` SummaryResponse, required
    - `summary` string, required

## Other responses

- `400` — Bad Request / Validation Failed (10015). Invalid, duplicate, empty, malformed, or overlong Idempotency-Key headers are rejected by Edge with HTTP 400 and error code 10015.
- `409` — A request with the same Idempotency-Key is still being processed (10036). Retry later with the same key and request.
- `413` — Payload Too Large. A request sent with an Idempotency-Key whose body exceeds the endpoint's Edge replay-protection limit (256 KB) is rejected before it reaches the service. Requests sent without the header are not subject to this limit.
- `422` — Validation Error. Reusing an Idempotency-Key with a different request body also returns 422 with error code 10027.
- `503` — Service unavailable (10016), including unavailable Edge idempotency protection for a keyed request.

## Changes

> 82 revisions in range; 1 not diffed.

- **2026-09-22** `9621f6123ebc` — 2 warning
  - added the new `10011` enum value to the `errors/items/code` response property for the response status `409`
  - added the new `domain_graduation_limit_exceeded` enum value to the `errors/items/code` response property for the response status `409`
- **2026-09-16** `a6a61a29ecdd` — 1 breaking, 1 warning, 6 info
  - the response's body type changed from `object` to no type for status `422`
  - removed the optional property `detail` from the response with the `422` status
  - added the new optional `header` request parameter `Idempotency-Key`
  - added `#/components/schemas/HTTPValidationError, #/components/schemas/inference-embedding_ErrorResponse` to the response body `anyOf` list for the response status `422`
  - …4 more

[Change history](https://skmtc.dev/team-telnyx/apis/telnyx-api-2/changes/ai/summarize/post.md)

---

[API](https://skmtc.dev/team-telnyx/apis/telnyx-api-2.md) · [All operations](https://skmtc.dev/team-telnyx/apis/telnyx-api-2/llms.txt) · [OpenAPI document](https://skmtc.dev/team-telnyx/apis/telnyx-api-2/revisions/16bfa298dc71?raw)