Catch the conversation.
Inspect HTTP and HTTPS requests, responses, repeated headers and text or binary bodies.
HTTP + HTTPSSomething smells off.
A nosy little HTTP debugger. Capture, inspect and replay your app’s traffic.
POST
/api/checkout503Service Unavailable
{
"error": "service_unavailable",
"message": "Payment provider is offline.",
"retry_after": 120
}Pick a request. Follow your nose.
Get closer to
the request.
Your app said one thing. The API heard another. See the whole conversation, down to the header that gave it away.
Meet your new debugger Find the interesting bit
filter: method=POST status>=500A local 503, on purpose.Snurpo 1.4.2
A flaky endpoint is easier to debug when you can control the next response. Match it, return a local mock, or edit and replay a request.
Explore traffic rulesLess guessing.
More “aha”.
Catch a request. See what happened. Change one thing. That is a much better conversation with your API.
Make it misbehave.
Apply saved rules to matching traffic. The inspector marks mocked responses and keeps the original messages when they change.
200503
Try a different ending.
Edit the method, URL, headers or body. A replay becomes a new exchange, so the earlier result stays available.
Edit → replay → inspectTry the switch. This example returns HTTP 200.
Good nose.
Great escape plan.
Open Copy as cURL, review the command and copy it into your terminal. Keep the captured method, URL, repeated headers and text or binary body.
For sh, bash and zsh. Previewing and copying send no traffic. The command can include captured credentials; review it before sharing.
See Copy as cURLcurl 'http://localhost:8080/api/checkout' \
--request POST \
--header 'Content-Type: application/json' \
--data-raw '{"product_id":"snurpo-sticker","quantity":1}'A local example. Ready for your terminal.
Curiosity has
a memory.
Name a session, add notes and come back to the same exchanges. Saved captures and built-in analysis stay on your computer.
A local archive you can revisit
Pin useful sessions, compare captures and export HAR or native archives. Follow analysis findings back to the requests behind them.
An agent can look too. You choose where.
Connect an MCP client to selected sessions. Grant replay, global rule access or device diagnostics separately when you need them.
Sharing and permissions reset when Snurpo restarts.Connect an MCP clientYour next bug
can run.
It can’t hide.
Download Snurpo 1.5.0. Local capture, saved sessions and export need no account or subscription.
