SSE tester
Inspect server-sent events as they arrive.
This check runs on the server. Input and results are not saved as execution history; hosted allowances apply.
About SSE tester
Capture up to three seconds of a public server-sent event stream and inspect complete events.
When to use it
Debug the framing of a public EventSource endpoint.
data: hello
id: 2
data: next event
How to use it
- Enter a public SSE endpoint.
- Run the bounded capture.
- Inspect event data, IDs, retry hints and comments.
Limits & privacy
Only public HTTP/HTTPS targets on ports 80, 443, 8080, or 8443. Private, loopback, link-local, and reserved IP ranges are blocked on every hop. Up to five redirects, 256 KiB response data, and a ten-second overall deadline. No cookies or user credentials are sent. Uses a three-second capture window, at most 100 complete events and 256 KiB of data. Partial events at the boundary are omitted. No authorization headers are sent; use your own client for private streams.
Use this tool from the API reference or connect through the SDK, CLI, SSH, or MCP. Hosted calls share your plan allowances.