Response Diff

Response Diff is a side-by-side comparison tool for two entries in your Request History — same endpoint across dev and prod, before and after a deploy, an old replay against a fresh run. Pick two; see exactly what changed.

How to diff

Open the History tab in the sidebar.
Click Compare to enter selection mode.
Click exactly two entries. The Compare button activates.
Click Compare — the Diff view opens.

Diff view

The Diff view has four tabs:

Tab	What it shows
Request	URL, method, headers, body — side-by-side
Response	Status, headers, body with JSON-aware structural diff
Timing	Duration, request/response size
All	Linear merged view for long diffs

Unchanged fields render dimly.
Added (⊕) and removed fields are highlighted with color badges.
Changed (⚠) fields show old / new inline.

Controls in the header:

[Swap A ↔ B] — flip sides
[Save as diff test] — generate a .flow file with @assert body equals assertions pinning response B as the expected result
[Back] — return to history

Example — save as diff test

After clicking Save as diff test, Sendpad writes a .flow like:

### A — GET user (dev)
# @name a
GET {{baseUrl_dev}}/users/42
# @extract a_body = $.

### B — GET user (staging)
# @name b
GET {{baseUrl_staging}}/users/42
# @assert body equals {{a_body}}

Run this flow any time to verify the two envs haven’t drifted.

Free vs Pro

Compare mode is hidden on the Free tier.