Happo exposes a public, REST-like, API that you can use to create or enhance custom integrations. The API resides at https://happo.io, and all endpoints use the /api namespace.All API endpoints are auth protected. To successfully issue a command, you need to provide an authentication header with your request. There are two ways to authenticate. JWT authentication is more secure but can be a little tricky to set up. HTTP Basic authentication is a less secure alternative, but is a good option if you want a simpler setup.
With Basic authentication, you provide an Authorization: Basic <token> header where the token is a base64 encoded string of your apiKey:apiSecret tokens.
This auth token is a JSON web token generated based on your API key and API secret. Pass { key: <your API key> } as the payload of the JWT call and the API secret as the secret, and set a kid header equal to the API key. Pass the resulting token as a Authorization: Bearer <generated token> header in all API requests.
An example of how to construct the JWT token can be found in the source code for the happo.io client.
Here's a full list of API paths you can call. All endpoints speak JSON. Body params are sent as a JSON blob in the body of the request. Responses are sent as JSON in the body of the HTTP response.
POST /api/reports/:sha
Uploads a list of snapshots for a certain identifier (usually a commit
sha). If there is an existing report for the same sha, it will be
overwritten as a result of calling this endpoint, unless you're posting
partial reports.
URL params
sha | String | The id of the report. |
Body params
snaps | Array<Snapshot> | A list of snapshot objects associated with the report |
project | String | (optional) The identifying name of the project this report should belong to. If none is specified, the default project will be used. |
link | String | (optional) URL to the source of the report (e.g. PR URL). |
message | String | (optional) A short string describing the source of the report (e.g. PR title). |
partial | Boolean | (optional) Set this to true to amend the report instead of overwriting it. This is useful if you are running multiple processes for the same sha. Remember to call the Complete Report endpoint once you are done uploading all the partials, otherwise the report will never be fully constructed and useful. |
Response
json | ReportStatus | An object containing a url where the uploaded report can be accessed |
GET /api/reports/:sha
Gets a list of snapshots for a certain identifier (usually a commit sha).
URL params
sha | String | The id of the report. |
Query params
project | String | (optional) The identifying name of the project this report belongs to. If none is specified, the default project will be assumed. |
Response
json | Array<Snapshot> | A list of snapshots associated with this sha. |
GET /api/reports/:sha/status
Gets some metadata about a report
URL params
sha | String | The id of the report. |
Query params
project | String | (optional) The identifying name of the project this report belongs to. If none is specified, the default project will be assumed. |
Response
json | ReportStatus | An object containing useful information about a report |
POST /api/reports/:sha/complete
When you're uploading partial reports (via the Create Report endpoint), you need
to use this endpoint to signal that all the partials have been added and that
the report is complete.
URL params
sha | String | The id of the report. |
Body params
project | String | (optional) The identifying name of the project the reports belong to. If none is specified, the default project will be assumed. |
Response
json | ReportStatus | An object containing useful information about a report |
POST /api/reports/:sha1/compare/:sha2
Compare reports and get useful information on the possible differences.
URL params
sha1 | String | The id of the "before" report. |
sha2 | String | The id of the "after" report. |
Body params
project | String | (optional) The identifying name of the project the reports belong to. If none is specified, the default project will be assumed. |
link | String | (optional) URL to the source of the report (e.g. PR URL). |
message | String | (optional) A short string describing the source of the report (e.g. PR title). |
notify | String | (optional) An email address, or a list of comma-separated email addresses that you want to notify with the results of the comparison. |
isAsync | Boolean | (optional) Set this option to `true` to make calls return immediately, without waiting for comparison results. You'll have to rely on the build status for the results. Using this option will also allow you to schedule future comparisons on reports that are currently being processed. |
fallbackShas | Array<String> | (optional) Provide a list of shas/report identifiers that the comparison is allowed to fall back to, if the `sha1` param isn't matching any reports. The order of this list matters -- put the most desirable fallback first in the list. |
Response
json | Comparison | An object with useful properties describing the differences between the two reports. |
GET /api/reports/:sha1/compare/:sha2/status
Get the comparison status between two reports. This endpoint can be used after the "Compare two reports" endpoint has been used, to check for the current resolution status.
URL params
sha1 | String | The id of the "before" report. |
sha2 | String | The id of the "after" report. |
Body params
project | String | (optional) The identifying name of the project the reports belong to. If none is specified, the default project will be assumed. |
GET /api/reports/:sha/comparison-statuses
Get all comparison statuses for a sha. The response will contain a list of comparison statuses where the report is either the "before" report or the "after" report.
URL params
sha | String | The id of a report. |
Query params
project | String | (optional) The identifying name of the project the reports belong to. If none is specified, the default project will be assumed. |
GET /api/comparisons
Get comparisons from your account.
Query params
from | Date | (optional) (An ISO 8601 string) Get comparisons created after this timestamp. |
to | Date | (optional) (An ISO 8601 string) Get comparisons created before this timestamp. |
limit | Number | (optional) Default 10. Controls how many items are returned. |
project | String | (optional)
The name of the project to return comparisons for. If left out,
comparisons for all projects will be returned.
|
POST /api/jobs/:sha1/:sha2/orchestrate
Tell Happo that you are about to run multiple comparisons between two
shas. A special report will be created and a single, combined build status
will be posted to github.
URL params
sha1 | String | The id of the "before" report. |
sha2 | String | The id of the "after" report. |
Body params
projects | Array<String> |
A list of projects (identifying names) that you want to be part
of the job.
|
link | String | (optional) URL to the source of the orchestration job (e.g. PR URL). |
message | String | (optional) A short string describing the source of the job (e.g. PR title). |
Response
json | Job | An object with details about the job that was created/found. |
POST /api/jobs/:sha1/:sha2
Tell Happo that you are about to run a comparison between two shas. A job
will either be created (when no orchestration job exists for the same
shas) or reused (when an orchestration job exists for the shas).
URL params
sha1 | String | The id of the "before" report. |
sha2 | String | The id of the "after" report. |
Body params
project | String | (optional)
The project (identifying name) which this job is running for. Leave
empty to use the default project.
|
projects | Array<String> | (optional)
Pass an array of project names to create multiple jobs in one go. If orchestration is used, only one job will be created. If multiple jobs are created, the response will change to an array of jobs.
|
link | String | (optional) URL to the source of the job (e.g. PR URL). |
message | String | (optional) A short string describing the source of the job (e.g. PR title). |
Response
json | Job | An object with details about the job that was created/found. |
POST /api/jobs/:sha1/:sha2/cancel
Tell Happo that a job comparing two shas had to be cancelled for some
reason. It might have been cancelled in CI or failed in some other way.
When you're using orchestrated jobs, this can help prevent orchestrated
jobs getting in an infinite "pending" state.
URL params
sha1 | String | The id of the "before" report. |
sha2 | String | The id of the "after" report. |
Body params
project | String | (optional)
The project (identifying name) which this job is running for. Leave
empty to use the default project.
|
status | String | (optional)
Either "failure" or "success". This will control what status will be
posted to GitHub. The default is "failure".
|
link | String | (optional) URL to the source of the report (e.g. PR URL). |
message | String | (optional)
A description of why the job was cancelled, e.g. "Cancelled in CI"
|
POST /api/jobs/:sha1/:sha2/fail
GET /api/jobs
Get jobs from your account. A job encompasses creating a report and comparing that report with a previous report. Jobs can be automatically created (if you e.g. use any of the happo-ci* scripts) or manually via the API.
Query params
from | Date | (optional) (An ISO 8601 string) Get jobs created after this timestamp. |
to | Date | (optional) (An ISO 8601 string) Get jobs created before this timestamp. |
limit | Number | (optional) Default 10. Controls how many items are returned. Max is 100 -- if you specify a larger number you will still get at most 100 back. |
Response
json | Array<JobDetail> | A list of jobs |
GET /api/jobs/:id
URL params
id | Number | The ID of the job |
Response
json | JobDetail | Details about the job |
POST /api/ignored-diffs
Use this endpoint to permanently ignore a diff between two snapshots. The
snapshotId1/snapshotId2 params need to correspond to ids from Snapshot
objects.
Body params
snapshot1Id | String | A snapshot id |
snapshot2Id | String | A snapshot id |
POST /api/subscriptions/:component
Add subscribers (email addresses) to a specific UI component. When a diff is
found in a component, subscribers are notified with a link to the Happo report.
Users can themselves unsubscribe manually. If you try adding an email
address that has been unsubscribed by the user, it will be ignored and the
user will continue to be unsubscribed.
URL params
component | String | The name of a component. Should match component names that are in the reports. |
Body params
emailAddresses | Array<String> | A list of email addresses to add as subscribers. |
DELETE /api/subscriptions/:component
Remove subscribers for a specific UI component.
URL params
component | String | The name of a component. Should match component names that are in the reports. |
Body params
emailAddresses | Array<String> | A list of email addresses to remove subscriptions for. |
GET /api/components/:component/:variant/:target
Get the latest snapshot for a component variant.
URL params
component | String | The name of a component. Should match component names that are in the reports. |
variant | String | The name of the variant. Should match variant names that are in the reports. |
target | String | The target of the snapshot. Should match target names that are in the reports. |
Query params
project | String | (optional) The identifying name of the project this report belongs to. If none is specified, the default project will be assumed. |
Response
json | Snapshot | An object with details about the snapshot. |
POST /api/skip/:sha
Tells Happo to skip running for a certain sha. This is useful if you have Happo
configured as a required check for your PRs but want to avoid running Happo
tests (e.g. because no UI code changed). Calling this endpoint will post a
successful build status to the PR/commit.
URL params
sha | String | The sha of the commit to skip. |
Body params
project | String | (optional) The identifying name of the project associated with the call. |
label | String | (optional) An optional message to use with the build status (default is "Skipped") |
POST /api/reports/:fromSha/clone/:toSha
Clones a report from one identifier/sha to another. This is useful if you know a commit doesn't introduce any visual changes but you still want it to be associated with a report. An example use-case of this would be if you have some logic to skip a Happo run if a PR has already run Happo on a commit, and a subsequent commit does not touch any UI code. You can then clone the existing report (from the previous commit) to the new commit. After that you can run a comparison with the cloned report set as the "after" report to trigger a Happo build status on the PR.
Cloning a report does not affect your snapshot usage.
URL params
fromSha | String | The id of the report to clone from |
toSha | String | The id of the report to clone to |
Body params
project | String | (optional) The identifying name of the project for which the clone should be created. If none is specified, the default project will be used. |
link | String | (optional) URL to the source of the report (e.g. PR URL). If omitted, the link from the source/from report will be used |
message | String | (optional) A short string describing the source of the report (e.g. PR title). If omitted, the link from the source/from report will be used. |
Response
json | ReportStatus | An object containing a url where the uploaded report can be accessed |
GET /api/diff-counts
Get a sorted list of components and the number of diffs they have for reports
created on the main branch. This endpoint can be used to figure out what
components contribute the most to flaky/spurious diffs.
Query params
project | String | (optional) The identifying name of the project to fetch diff counts for. If none is specified, the default project will be used. |
from | Date | (optional)
(An ISO 8601 string) Show diff counts after this point in time. Default is 30 days ago.
|
to | Date |
(An ISO 8601 string) Show diff counts up until this point in time. If you don't pass in this parameter, you'll get diff counts up until the current timestamp.
|
Response
json | Array | An ordered list of components and their respective diff counts. |
These are the domain objects you can come across while communicating with the API.
An object describing a screenshot of a certain component variant
url | String |
URL of the screenshot image. It's important that the URL is
deterministically generated based on the contents of the image. A hash
function (like md5) is of good help here, so that two images that have
the same bitmap content end up having the same URL.
More about URL creation. |
variant | String | The name of the variant (e.g. "disabled") |
target | String | The snapshot's target (e.g. "firefox", "iphone 7") |
component | String | The name of the component shown in the screenshot (e.g. "Button") |
height | Number | The pixel height of the screenshot image |
width | Number | The pixel width of the screenshot image |
id | String | A unique identifier for the snapshot |
An object with useful properties for a report.
url | String | A URL leading to the report page |
completedAt | Date |
(An ISO 8601 string) Present if all the partials for a report have
been added. Null otherwise. If you're not using partial reports, this
value is always present.
|
createdAt | Date |
(An ISO 8601 string) The timestamp for when the report was initially
created.
|
snapshotCount | Number | The total number of snapshots included in the report |
An object with useful properties describing the differences between two reports.
diffs | Array<Snapshot> | A list of snapshots that are different |
added | Array<Snapshot> | Snapshots that have been added |
deleted | Array<Snapshot> | Snapshots that have been removed |
unchanged | Array<Snapshot> | A list of identical snapshots |
summary | String | A summary of the results, with the most important information listed |
equal | Boolean | True if the two reports are identical, false otherwise |
status | String |
Either "failure" or "success". If the two reports are equal, or a user has
manually accepted the comparison, the value is "success". If the two reports are
not equal, or a user has manually rejected the comparison, the value is
"failure".
|
compareUrl | String | A link to a happo report page |
statusImageUrl | String |
A link to an image showing the status for the comparison
|
An object with information about the status of a comparison.
sha1 | String | The id of the "before" report. |
sha2 | String | The id of the "after" report. |
status | String | One of three values: "success" when the comparison is approved, "failure" when the comparison has been rejected or "awaiting review" when the comparison needs a review |
url | String | A URL leading to the comparison page |
createdAt | Date |
(An ISO 8601 string) The timestamp for when the comparison was initially
created.
|
diffs | Number | The number of diffs in this comparison |
unchanged | Number | The number of unchanged snapshots |
added | Number | The number of added snapshots |
deleted | Number | The number of added snapshots |
link | String | A URL leading to the PR/commit that triggered the comparison |
message | String | A description of the PR/commit that triggered the comparison |
project | String | The name of the project that this comparison belongs to |
An small object with basic properties for a job.
url | String | A URL leading to the job page |
id | Number | A unique identifier for the job |
An object with useful properties for a job.
id | Number | A unique identifier for the job |
createdAt | Date | (An ISO 8601 string) The creation timestamp for the job |
finishedAt | Date | (An ISO 8601 string) The timestamp when the job finished |
sha1 | String | The ID of the "before" report |
sha2 | String | The ID of the "after" report |
description | String | A description of the status that the job has |
status | String | Can be "failure", "success", or "pending" |
link | String | (optional) URL to the source of the job (e.g. PR URL). |
message | String | (optional) A short string describing the source of the job (e.g. PR title). |
url | String | A URL leading to the job page |