---
title: "Discover available streams"
method: POST
path: "/source_discover"
tags: ["Stateless Sync API"]
---

# Discover available streams

`POST /source_discover`

Streams NDJSON messages (catalog, logs, traces) for the configured source.

## Response `200`

NDJSON stream of discover messages

## Other responses

- `400` — Invalid params

## Changes

- **2026-04-05** `db172f650b83` — 1 breaking, 1 warning
  - added the new required `header` request parameter `x-source`
  - deleted the `header` request parameter `x-pipeline`
- **2026-04-05** `42d2d829b545` — 4 breaking, 2 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 required property `oneOf[#/components/schemas/CatalogMessage]/catalog/streams/items/newer_than_field` from the response with the `200` status
  - …3 more

[Change history](https://skmtc.dev/stripe/apis/stripe-sync-engine/changes/source_discover/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/c2c853a0769d/schema)