---
title: "Check connector connection"
method: POST
path: "/pipeline_check"
tags: ["Stateless Sync API"]
---

# Check connector connection

`POST /pipeline_check`

Validates the source/destination config and tests connectivity. Streams NDJSON messages (connection_status, log, trace) tagged with _emitted_by.

## Response `200`

NDJSON stream of check messages

## Other responses

- `400` — Invalid params

## Changes

- **2026-04-05** `42d2d829b545` — 3 breaking, 1 warning, 1 info
  - added the new required `header` request parameter `x-pipeline`
  - removed the request body
  - added `#/components/schemas/TraceMessage` to the response body `oneOf` list for the response status `200`
  - removed the optional property `oneOf[#/components/schemas/LogMessage]/log/data` from the response with the `200` status
  - …1 more

[Change history](https://skmtc.dev/stripe/apis/stripe-sync-engine/changes/pipeline_check/post.md)

---

[API](https://skmtc.dev/stripe/apis/stripe-sync-engine.md) · [All operations](https://skmtc.dev/stripe/apis/stripe-sync-engine/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/stripe/stripe-sync-engine/revisions/8aee5636331b/schema)