---
title: "Write to process stdin"
method: POST
path: "/process/{process_id}/stdin"
---

# Write to process stdin

`POST /process/{process_id}/stdin`

## Path parameters

- `process_id` string, uuid, required

## Request body

- ProcessStdinRequest — Data to write to the process standard input.
  - `data_b64` string, required — Base64-encoded data to write.

## Response `200`

Bytes written

- ProcessStdinResult — Result of writing to stdin.
  - `written_bytes` integer — Number of bytes written.

## Other responses

- `400` — Bad Request
- `404` — Not Found
- `500` — Internal Server Error

## Changes

> 52 revisions in range; 4 could not be searched.

- **2025-08-20** `e1658c618fd2` — 1 info
  - endpoint added
- **2025-06-27** `f980a92ab23f` — 1 breaking
  - api path removed without deprecation

[Change history](https://skmtc.dev/kernel/apis/kernel-images-api/changes/process/:process_id/stdin/post.md)

---

[API](https://skmtc.dev/kernel/apis/kernel-images-api.md) · [All operations](https://skmtc.dev/kernel/apis/kernel-images-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/kernel/kernel-images-api/revisions/7a641fa15a85/schema)