---
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

- **2026-04-15** `4e5abb8c5e22` — 2 breaking
  - removed the request body
  - the `header` request parameter `x-source` became required
- **2026-04-15** `2e101196e4f5` — 2 info
  - added optional request body
  - the `header` request parameter `x-source` became optional
- **2026-04-14** `4e5abb8c5e22` — 4 warning, 1 info
  - 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/TraceMessage]/trace/oneOf[subschema #2]/stream_status/status` response property for the response status `200`
  - added the new `system_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 `transient_error` enum value to the `oneOf[#/components/schemas/TraceMessage]/trace/oneOf[subschema #2]/stream_status/status` response property for the response status `200`
  - …1 more
- **2026-04-14** `94093fe7df85` — 1 breaking, 1 info
  - added `subschema #2, subschema #4` to the `oneOf[#/components/schemas/TraceMessage]/trace` response property `oneOf` list for the response status `200`
  - removed `subschema #2` from the `oneOf[#/components/schemas/TraceMessage]/trace` response property `oneOf` list for the response status `200`
- …earlier changes not shown

[Full 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/4e5abb8c5e22/schema)