HTTP Catcher in depth

Every control and text this screen shows, in screen order. The list is read from the demo by a crawl, and CI fails when the screen changes without its entry here.

The HTTP Catcher keeps every request your app sends to a bin's catch URL, and answers as the service it stands in for.

The screen as a whole: HTTP Catcher.

The numbers match the entries below. The picture shows the first screenful; controls further down, and texts, have no marker.

On the screenCopy Anchor Link

1. HTTP CatcherCopy Anchor Link

Heading.

• What it does: Names the open screen in the header.

2. Read the HTTP Catcher guideCopy Anchor Link

Link.

• What it does: Opens this screen's page in the user guide, in a new tab.
• Links to: HTTP Catcher.

3. BinsCopy Anchor Link

Heading.

• What it does: The bins: each has a catch URL that keeps every request sent to it.
• Same action elsewhere: REST GET /api/v1/http/bins, CLI sendmock http bin list, MCP sendmock_http_bin_list

4. New binCopy Anchor Link

Button.

• What it does: Opens New bin.

5. All requestsCopy Anchor Link

Button.

• What it does: Shows the requests of every bin, with their count.
• Same action elsewhere: REST GET /api/v1/http/requests, CLI sendmock http list, MCP sendmock_http_list

6. slack Slack # Last # minutes agoCopy Anchor Link

Button.

• What it does: A bin (here the demo's slack bin with the Slack preset): its name, preset, request count and last request. Shows its requests.

7. discord Discord # Last # minutes agoCopy Anchor Link

Button.

• What it does: The demo's discord bin, answering as Discord does.

8. push Firebase # Last # minutes agoCopy Anchor Link

Button.

• What it does: The demo's push bin, answering as Firebase Cloud Messaging does.

9. analytics # Last # minutes agoCopy Anchor Link

Button.

• What it does: The demo's analytics bin, with no preset.

10. uploads # Last # minutes agoCopy Anchor Link

Button.

• What it does: The demo's uploads bin, with no preset.

11. All requestsCopy Anchor Link

Heading.

• What it does: The requests of the chosen bin, newest first.

12. POST … # minutes agoCopy Anchor Link

Button, in each row.

• What it does: A captured request: its method, path, when it came and the status SendMock answered; shows it.
• Same action elsewhere: REST GET /api/v1/http/requests/{requestId}, CLI sendmock http show, MCP sendmock_http_get

13. Pick a request to see what your app sent and what SendMock answered.Copy Anchor Link

Text.

• What it does: Shown until a request is open.

A bin is openCopy Anchor Link

14. slackCopy Anchor Link

Heading.

• What it does: The open bin's name (here slack).

15. RequestsCopy Anchor Link

Tab.

• What it does: The bin's captured requests.

16. ResponsesCopy Anchor Link

Tab.

• What it does: What the bin answers: its default reply and the rules that answer some requests differently, with delays and failure rates.
• Links to: Advanced: catcher responses.
• Same action elsewhere: REST GET /api/v1/http/bins/{binId}/responses, CLI sendmock http response list, MCP sendmock_http_response_list

17. Copy catch URLCopy Anchor Link

Button.

• What it does: Copies the bin's catch URL, /catch/<bin>/..., to point your app at.

18. Clear requestsCopy Anchor Link

Button.

• What it does: Deletes the bin's captured requests.
• Same action elsewhere: REST DELETE /api/v1/http/requests, CLI sendmock http clear, MCP sendmock_http_clear

19. Delete binCopy Anchor Link

Button.

• What it does: Deletes the bin and its requests, after you confirm.
• Same action elsewhere: REST DELETE /api/v1/http/bins/{binId}, CLI sendmock http bin delete, MCP sendmock_http_bin_delete

20. POST / # minutes agoCopy Anchor Link

Button, in each row.

• What it does: A request in this bin; shows it.

A request is openCopy Anchor Link

21. Copy URLCopy Anchor Link

Button.

• What it does: Copies the full URL the request was sent to.

22. Month #, #, #:# from #.#.#.#, answered in # msCopy Anchor Link

Text.

• What it does: When the request came, from which address, and how long SendMock took to answer.

23. Copy as cURLCopy Anchor Link

Button.

• What it does: Copies the request as a curl command.

24. Forward to URLCopy Anchor Link

Button.

• What it does: Sends the same request on to another URL, such as your local handler, and shows its answer.
• Same action elsewhere: REST POST /api/v1/http/requests/{requestId}/forward, CLI sendmock http forward, MCP sendmock_http_forward

25. Send to webhookCopy Anchor Link

Button.

• What it does: Sends the request's http.captured event to a webhook endpoint now.
• Same action elsewhere: REST POST /api/v1/webhooks/endpoints/{endpointId}/send, CLI sendmock webhook send, MCP sendmock_webhook_send

26. PreviewCopy Anchor Link

Tab.

• What it does: How the message would look in the service the preset copies (here Slack).

27. BodyCopy Anchor Link

Tab.

• What it does: The body as received, formatted when it is JSON or a form.

28. HeadersCopy Anchor Link

Tab.

• What it does: Every header received.

29. QueryCopy Anchor Link

Tab.

• What it does: The query parameters.

30. ResponseCopy Anchor Link

Tab.

• What it does: What SendMock answered: status, headers and body, and which rule chose it.

31. Incoming webhook APPCopy Anchor Link

Text.

• What it does: In the Slack preview: the sender as Slack would show it.

32. Email bouncedCopy Anchor Link

Text.

• What it does: In the Slack preview: the message text (here a bounce alert).

33. [email protected] did not get Your verification code .Copy Anchor Link

Text.

• What it does: In the Slack preview: the message's details.

34. Reason # #.#.# user unknownCopy Anchor Link

Text.

• What it does: In the Slack preview: a field of the message.

35. Provider SendMockCopy Anchor Link

Text.

• What it does: In the Slack preview: a field of the message.

36. Sent by acme-app workerCopy Anchor Link

Text.

• What it does: In the Slack preview: the message's footer.

New bin dialogCopy Anchor Link

37. New binCopy Anchor Link

Heading.

• What it does: The New bin dialog.

38. Requests to its catch URL are kept here and answered with its reply.Copy Anchor Link

Text.

• What it does: Explains a bin.

39. NameCopy Anchor Link

Field.

• What it does: The bin's name, which is also its catch URL's first path part.

40. http://#.#.#.#:#/catch/<name>Copy Anchor Link

Text.

• What it does: The catch URL the bin will have.

41. PresetCopy Anchor Link

Drop-down.

• What it does: A service to answer as: Slack, Discord, Teams, Google Chat, Telegram, FCM, Expo, OneSignal or generic.

42. Answers # {"ok":true}.Copy Anchor Link

Text.

• What it does: What the chosen preset answers.

43. CancelCopy Anchor Link

Button.

• What it does: Closes the dialog without doing anything.

44. Add binCopy Anchor Link

Button.

• What it does: Adds the bin.
• Same action elsewhere: REST POST /api/v1/http/bins, CLI sendmock http bin create, MCP sendmock_http_bin_create

45. CloseCopy Anchor Link

Button.

• What it does: Closes the dialog.

With no data yetCopy Anchor Link

46. slack Slack # No requests yetCopy Anchor Link

Button.

• What it does: A bin with no requests yet.

47. discord Discord # No requests yetCopy Anchor Link

Button.

• What it does: A bin with no requests yet.

48. push Firebase # No requests yetCopy Anchor Link

Button.

• What it does: A bin with no requests yet.

49. analytics # No requests yetCopy Anchor Link

Button.

• What it does: A bin with no requests yet.

50. uploads # No requests yetCopy Anchor Link

Button.

• What it does: A bin with no requests yet.

51. No requests caught yet.Copy Anchor Link

Text.

• What it does: Shown while no request has come.

When the data cannot loadCopy Anchor Link

52. Could not load the HTTP bins. Try againCopy Anchor Link

Message.

• What it does: Shown when the bins could not be loaded.
• Errors: Check SendMock is running, then press Try again.

53. Could not load the HTTP bins.Copy Anchor Link

Text.

• What it does: The message inside the alert.

54. Try againCopy Anchor Link

Button.

• What it does: Loads the bins again.
• Same action elsewhere: REST GET /api/v1/http/bins, CLI sendmock http bin list, MCP sendmock_http_bin_list