---
title: "Read records from source"
method: POST
path: "/pipeline_read"
tags: ["Stateless Sync API"]
---

# Read records from source

`POST /pipeline_read`

Streams NDJSON messages (records, state, catalog). Optional NDJSON body provides live events as input.

## Query parameters

- `state_limit` integer — Stop streaming after N state messages.
- `time_limit` number — Stop streaming after N seconds.

## Response `200`

NDJSON stream of sync messages

## Other responses

- `400` — Invalid params

## Changes

- **2026-04-15** `4e5abb8c5e22` — 2 breaking
  - removed the media type `application/json` from the request body
  - the `header` request parameter `x-pipeline` became required
- **2026-04-15** `2e101196e4f5` — 2 info
  - added the media type `application/json` to the request body
  - the `header` request parameter `x-pipeline` became optional
- **2026-04-14** `4e5abb8c5e22` — 8 warning, 2 info
  - added the new `auth_error` enum value to the `oneOf[#/components/schemas/EofMessage]/eof/stream_progress/additionalProperties/status` response property for the response status `200`
  - added the new `auth_error` enum value to the `oneOf[#/components/schemas/TraceMessage]/trace/oneOf[subschema #2]/stream_status/status` response property for the response status `200`
  - added the new `config_error` enum value to the `oneOf[#/components/schemas/EofMessage]/eof/stream_progress/additionalProperties/status` response property for the response status `200`
  - added the new `config_error` enum value to the `oneOf[#/components/schemas/TraceMessage]/trace/oneOf[subschema #2]/stream_status/status` response property for the response status `200`
  - …6 more
- **2026-04-14** `fe381b9ff4bd` — 1 warning
  - removed the optional property `oneOf[#/components/schemas/ControlMessage]/control/oneOf[subschema #1]/source_config/backfill_concurrency` from the response with the `200` status
- …earlier changes not shown

[Full history](https://skmtc.dev/stripe/apis/stripe-sync-engine/changes/pipeline_read/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/4e5abb8c5e22/schema)