| 1 | --- |
| 2 | title: Webhooks |
| 3 | description: Have g1t send a repository's or a workspace's events to your own address as they happen, signed and retried. |
| 4 | --- |
| 5 | |
| 6 | A webhook sends events to an HTTPS address you choose, as they happen: a |
| 7 | push, an issue opened, a pull request merged, checks finished, the merge |
| 8 | queue moving. Use them to build on g1t: post to chat, start a deploy, keep |
| 9 | another system in step. |
| 10 | |
| 11 | A webhook belongs to one of two things: |
| 12 | |
| 13 | | | Sent the events of | Managed by | Where | |
| 14 | | --- | --- | --- | --- | |
| 15 | | A repository's | That repository | People with the Admin [role](/guides/access-and-roles/) on it | The project's **Settings → Webhooks** | |
| 16 | | A workspace's | Every repository in the workspace, the workspace's own [packages](/guides/packages/), and its [teams](/guides/teams/) | Owners | The workspace's **Settings → Webhooks** | |
| 17 | |
| 18 | Seeing a repository's webhooks, and their deliveries, needs Admin too: the |
| 19 | page is not shown to anyone else, since a webhook's address and secret are |
| 20 | the workspace's own. |
| 21 | |
| 22 | ## Add one |
| 23 | |
| 24 | 1. Open **Settings → Webhooks** for the repository or the workspace. |
| 25 | 2. Give the **payload URL**: an HTTPS address on the public internet. |
| 26 | 3. Choose the events, or leave **Everything**, which also includes event |
| 27 | types added later. |
| 28 | 4. Give a **secret**, or leave it empty and g1t makes one. A secret g1t |
| 29 | makes is shown once. |
| 30 | 5. **Add webhook**. g1t sends it a `ping` at once, so you can see straight |
| 31 | away whether your receiver answers. |
| 32 | |
| 33 | ## What is sent |
| 34 | |
| 35 | Each delivery is a `POST` with a JSON body: |
| 36 | |
| 37 | ```json |
| 38 | { |
| 39 | "id": "evt_01m401tecce9h8wt7k3ayvs72n", |
| 40 | "type": "comment.created", |
| 41 | "time": "2026-10-03T04:54:37.708Z", |
| 42 | "workspace": "acme", |
| 43 | "repository": { "id": "rep_cf985171afeee00a62a1c0acb0", "full_name": "acme/web" }, |
| 44 | "actor": { "id": "usr_b51a1a09fc53e9471cbe1426b7", "username": "ada" }, |
| 45 | "data": { "comment_id": "cmt_01m401te9eekb92kccgwhympr4", "number": 3, "repo_id": "rep_cf985171afeee00a62a1c0acb0" } |
| 46 | } |
| 47 | ``` |
| 48 | |
| 49 | `data` holds what the event is about: ids and numbers to fetch the rest with |
| 50 | the [API](/reference/api/). `actor` is null for something g1t did by |
| 51 | itself. |
| 52 | |
| 53 | With these headers: |
| 54 | |
| 55 | | Header | | |
| 56 | | --- | --- | |
| 57 | | `X-G1t-Event` | The event type, such as `pull.merged`, or `ping`. | |
| 58 | | `X-G1t-Delivery` | The delivery's id. A redelivery has a new one. | |
| 59 | | `X-G1t-Hook` | The webhook's id. | |
| 60 | | `X-G1t-Signature-256` | `sha256=` and the HMAC-SHA256 of the body, keyed with the secret. | |
| 61 | | `User-Agent` | `g1t-webhooks/1`, followed by a link to this page | |
| 62 | |
| 63 | ## Events |
| 64 | |
| 65 | | Event | When | |
| 66 | | --- | --- | |
| 67 | | `git.push` | A branch moved. `data.ref`, `data.after`, `data.default_branch`. | |
| 68 | | `repo.created`, `repo.forked` | A repository was made, or forked for a pull request. | |
| 69 | | `repo.updated` | Its description, website, topics, protection or visibility changed. | |
| 70 | | `repo.visibility_changed` | It was made public or private. | |
| 71 | | `repo.renamed` | It was given a new name. Its old address redirects. | |
| 72 | | `repo.transferred` | It moved to another workspace. | |
| 73 | | `repo.default_branch_changed` | Its default branch changed, or the default branch was renamed. | |
| 74 | | `branch.renamed` | A branch was renamed. | |
| 75 | | `repo.collaborator_added`, `repo.collaborator_role_changed`, `repo.collaborator_removed` | Someone was given a role on it, had their role changed, or lost it. `data.username`, `data.role`, `data.previous_role`. See [access and roles](/guides/access-and-roles/). | |
| 76 | | `team.created`, `team.edited`, `team.deleted` | A [team](/guides/teams/) was created, changed or deleted. Sent to the workspace's webhooks. `data.workspace`, `data.team` (its slug), `data.team_id`, `data.name`, `data.visibility`, `data.parent`; on `team.edited`, `data.changes`. | |
| 77 | | `team.member_added`, `team.member_role_changed`, `team.member_removed` | Someone joined or left a team, or became its maintainer or a member. Sent to the workspace's webhooks. `data.username`, `data.role` (`member` or `maintainer`), `data.previous_role`. | |
| 78 | | `team.repo_added`, `team.repo_role_changed`, `team.repo_removed` | A team was given a role on the repository, had it changed, or lost it. `data.repo`, `data.repo_id`, `data.repo_role`, `data.previous_repo_role`. | |
| 79 | | `repo.archived`, `repo.unarchived` | It was made read-only, or writable again. | |
| 80 | | `repo.deleted`, `repo.restored`, `repo.purged` | It was deleted, restored within its 30 days, or removed for good. | |
| 81 | | `issue.labeled`, `issue.unlabeled`, `pull.labeled`, `pull.unlabeled` | A [label](/guides/labels/) was put on an issue or a pull request, or taken off: one event for each label. `data.number` and `data.label` (`name` and `color`). | |
| 82 | | `issue.milestoned`, `issue.demilestoned`, `pull.milestoned`, `pull.demilestoned` | An issue or a pull request was put in a [milestone](/guides/milestones/), or taken out of one. `data.milestone` (`number` and `title`). Moving it from one to another is both. | |
| 83 | | `pull.base_changed` | The branch a pull request merges into changed. `data.base` names it. See [pull requests into other branches](/guides/base-branches/). | |
| 84 | | `issue.opened`, `issue.updated`, `issue.assigned`, `issue.closed`, `issue.reopened` | An issue changed. `data.number` and `data.author` (`id` and `username`); on close, `data.reason` and `data.resolved_by`; on assignment, `data.assignees` and the newly assigned `data.added`. For an issue g1t's agent filed while at work, `data.author` is g1t and `data.requested_by` is the person it was working for. | |
| 85 | | `comment.created` | A comment or review on an issue or pull request. | |
| 86 | | `comment.edited` | A comment's text was [edited](/guides/pull-requests/#editing-and-deleting-comments). `data.comment_id`, `data.number`, `data.pull_id` on a pull request, and `data.changes.body.from`, what it said before. | |
| 87 | | `comment.deleted` | A comment was [deleted](/guides/pull-requests/#editing-and-deleting-comments). `data.comment_id`, `data.number`, `data.pull_id` on a pull request, and `data.comment` as it was: `id`, `body`, `author` (`id` and `username`), `created_at`, `path` and `line`. | |
| 88 | | `pull.opened`, `pull.ready`, `pull.updated`, `pull.merge_requested`, `pull.merged`, `pull.closed` | A pull request changed. `data.number`, `data.issue` and `data.author` (`id` and `username`); on merge, `data.commit`. For a change g1t made, `data.author` is g1t and `data.requested_by` is the person who asked for it; `actor` is still whoever caused the event. On a change by g1t, once g1t has worked it out, `data.confidence`: `level` (`high`, `medium` or `low`), `reasons`, `self_reported`, `uncertain_about`, `run_id` and `assessed_at`. See [how sure the agent is](/guides/working-with-g1t/#how-sure-the-agent-is). | |
| 89 | | `pull.reopened`, `pull.converted_to_draft` | A closed pull request was [reopened](/guides/pull-requests/#reopen-a-pull-request), or one ready for review was [turned back into a draft](/guides/pull-requests/#convert-to-a-draft). The same data as `pull.closed`; on reopen, `data.commit` is its head. | |
| 90 | | `pull.assigned` | People were assigned to a pull request. `data.assignees` is everyone assigned now, `data.added` those newly assigned. | |
| 91 | | `pull.review_requested`, `pull.review_request_removed` | Reviewers were asked for a pull request, or no longer are. `data.reviewers` names the people. `data.teams` lists the [teams](/guides/teams/#review-requests) asked, or no longer asked, each with `team` (`workspace/team`), `notified` (who in it was told) and `assigned` (who review assignment picked). `data.code_owners` is `true` when its [CODEOWNERS file](/guides/codeowners/) asked them. | |
| 92 | | `pull.stalled`, `pull.resumed` | g1t stopped seeing a pull request through until a person steps in, with why in `data.detail`; or it picked back up. | |
| 93 | | `secret_scanning_alert.created`, `.fixed`, `.dismissed`, `.reopened` | A [secret alert](/guides/security/secret-protection/) opened (found in history, or blocked at a push: `data.pusher`), was revoked, dismissed or reopened. `data.alert_id`, `data.title`, `data.path`, `data.line`, `data.severity`, `data.state`, `data.reason`, `data.link`. Never the secret. | |
| 94 | | `secret_scanning.bypass_requested`, `secret_scanning.bypass_reviewed` | Someone asked to bypass push protection, or the request was approved or denied (`data.state`). `data.request_id`, `data.alert_id`, `data.reason`. | |
| 95 | | `code_scanning_alert.created`, `.fixed`, `.dismissed`, `.reopened` | A [code scanning alert](/guides/security/code-scanning/) changed. `data.alert_id`, `data.alert_number`, `data.title`, `data.severity`, `data.path`, `data.line`, `data.state`, `data.link`. | |
| 96 | | `vulnerability_alert.created`, `.fixed`, `.dismissed`, `.reopened` | A [vulnerability alert](/guides/security/supply-chain/) changed. `data.alert_id`, `data.title` (package, version, lockfile and advisory), `data.severity`, `data.state`, `data.link`. | |
| 97 | | `checks.completed` | A pull request's checks finished: every status on its head has reported and none is still pending, or the merge queue took it out. `data.number`, `data.commit`, and `data.status`, `passed` or `failed`. | |
| 98 | | `status.created` | A status was set on a commit through the API. `data.sha`, `data.context`, `data.state`, `data.description`, `data.target_url`. See [Checks](/guides/checks/). | |
| 99 | | `check_run.created`, `check_run.completed` | A check run was reported on a commit, or completed. `data.check_run`: `id`, `name`, `head_sha`, `status`, `conclusion`, `details_url`, `external_id`, `html_url`, `output`, `actions`, `check_suite` and `app`. | |
| 100 | | `check_run.rerequested`, `check_run.requested_action` | Someone asked for a check run to run again, or pressed one of its buttons: `data.requested_action` is the button's `identifier`. Report a new run, or do what the button says. | |
| 101 | | `check_suite.completed`, `check_suite.rerequested` | Every latest check run of a reporter's suite on a commit completed, or someone asked for it to run again. `data.check_suite`: `id`, `head_sha`, `status`, `conclusion`, `app`. | |
| 102 | | `review.completed` | g1t reviewed a pull request. `data.verdict`. | |
| 103 | | `workflow.completed` | A [workflow](/guides/actions/) run finished. `data.workflow`, `data.conclusion`, `data.run_id`, `data.sha`, `data.pull`. | |
| 104 | | `deployment.succeeded`, `deployment.failed` | A g1t.page build of a [project](/guides/deployments/) finished, for production or a pull request's preview. `data.deployment_id`, `data.project`, `data.kind` (`production` or `preview`), `data.number` for a preview, `data.commit`, `data.path`, `data.error` on failure, and `data.recovered` when a success follows a failure. | |
| 105 | | `deployment.created` | A deployment was made, from any source: reported through the [API](/guides/deployments-api/), made by a g1t Actions job with an `environment:`, or a g1t.page build. `data.repo_id` and `data.deployment`, without its `payload`. | |
| 106 | | `deployment_status.created` | A deployment got a status, from any source. `data.repo_id`, `data.deployment` without its `payload`, and `data.deployment_status`. | |
| 107 | | `release.created`, `.published`, `.released`, `.prereleased`, `.edited`, `.unpublished`, `.deleted` | A [release](/guides/releases/) changed; one change can send several, as the [release activity types](/guides/actions/#releases) say. `data.release_id`, `data.tag_name`, and `data.release` (`tag_name`, `target`, `name`, `body`, `draft`, `prerelease`, `author`, `created_at`, `published_at`), as it was for `release.deleted`. On `release.edited`, `data.changes` holds the old `name` and `body`. | |
| 108 | | `queue.changed` | The merge queue gained, lost or settled an entry. | |
| 109 | | `session.appended` | An agent's session grew. Busy: choose it only if you need it. | |
| 110 | | `agent.asked` | An agent asked the agent on another pull request a question, or handed it work, while that one was not at work; g1t wakes it to answer. | |
| 111 | |
| 112 | [Managing a repository](/guides/managing-repositories/) says what each of |
| 113 | the `repo.` and `branch.` changes does. |
| 114 | |
| 115 | ## Check the signature |
| 116 | |
| 117 | Compute the HMAC-SHA256 of the raw body with your secret and compare it to |
| 118 | `X-G1t-Signature-256` in constant time, before you parse the body. |
| 119 | |
| 120 | ```js |
| 121 | // Node.js |
| 122 | import { createHmac, timingSafeEqual } from "node:crypto"; |
| 123 | |
| 124 | function fromG1t(rawBody, signature, secret) { |
| 125 | const expected = "sha256=" + createHmac("sha256", secret).update(rawBody).digest("hex"); |
| 126 | return signature?.length === expected.length && timingSafeEqual(Buffer.from(signature), Buffer.from(expected)); |
| 127 | } |
| 128 | ``` |
| 129 | |
| 130 | ```python |
| 131 | # Python |
| 132 | import hashlib, hmac |
| 133 | |
| 134 | def from_g1t(raw_body: bytes, signature: str, secret: str) -> bool: |
| 135 | expected = "sha256=" + hmac.new(secret.encode(), raw_body, hashlib.sha256).hexdigest() |
| 136 | return hmac.compare_digest(signature or "", expected) |
| 137 | ``` |
| 138 | |
| 139 | ## Answering, and retries |
| 140 | |
| 141 | Answer with any 2xx within 10 seconds. Do slow work after answering. |
| 142 | |
| 143 | A delivery that gets anything else, or no answer, is tried again after 1 |
| 144 | minute, 5 minutes, 30 minutes, 2 hours and 5 hours: six attempts over |
| 145 | about seven and a half hours. Then it is marked failed. Pausing or removing |
| 146 | a webhook stops its retries. |
| 147 | |
| 148 | An event is delivered to a webhook once. Use `X-G1t-Delivery`, or the |
| 149 | event's `id`, to ignore one you have already handled. |
| 150 | |
| 151 | ## The delivery log |
| 152 | |
| 153 | Each webhook keeps its deliveries for 14 days. Open **Deliveries** to see, |
| 154 | for each one, the request g1t sent, the status and body your receiver |
| 155 | answered with, how long it took, and when it will be tried again. |
| 156 | **Redeliver** sends the same payload again, as a new delivery. |
| 157 | |
| 158 | The status dot beside each webhook shows how its latest delivery went: |
| 159 | green delivered, amber waiting to try again, red failed. |
| 160 | |
| 161 | ## Addresses |
| 162 | |
| 163 | Webhooks are sent only over HTTPS, to public addresses. Private and local |
| 164 | addresses (`localhost`, `10.0.0.0/8`, `192.168.0.0/16` and the like) are |
| 165 | refused. To receive webhooks on your own machine while you build, use a |
| 166 | tunnel such as Cloudflare Tunnel. |
| 167 | |
| 168 | ## From the API |
| 169 | |
| 170 | The same routes, and the MCP server's `webhook` tool, work for a |
| 171 | repository's webhooks (give `repo`) and a workspace's (give `workspace` |
| 172 | instead). |
| 173 | |
| 174 | | `webhook` action | Route | |
| 175 | | --- | --- | |
| 176 | | `list` | `GET /repos/{owner}/{name}/hooks`, `GET /workspaces/{workspace}/hooks` | |
| 177 | | `create` | `POST …/hooks` with `url`, `events`, `secret` | |
| 178 | | `update` | `PATCH …/hooks/{id}` with `url`, `events`, `active` | |
| 179 | | `delete` | `DELETE …/hooks/{id}` | |
| 180 | | `ping` | `POST …/hooks/{id}/pings` | |
| 181 | | `list_deliveries` | `GET …/hooks/{id}/deliveries` | |
| 182 | | `redeliver` | `POST …/hooks/{id}/deliveries/{delivery}/redeliver` | |
| 183 | |
| 184 | ```sh |
| 185 | curl -X POST https://api.g1t.sh/repos/acme/web/hooks \ |
| 186 | -H "Authorization: Bearer $G1T_TOKEN" -H "Content-Type: application/json" \ |
| 187 | -d '{"url": "https://example.com/g1t", "events": ["pull.merged", "checks.completed"]}' |
| 188 | ``` |