GitHub: Get a branch

GitHub repos.reposGetBranch: arguments, response, policy and SDK examples.

Operation github.repos_get_branch

Provider route: GET /repos/{owner}/{repo}/branches/{branch}. Alter supplies the connection’s credentials and routing.

Call through Alter

Install @alter-ai/sdk @alter-ai/github with npm, or alter-sdk-github with pip. Supply your connected customer’s grant ID and the arguments described below.

import { App } from "@alter-ai/sdk";
import { GitHubIntegration } from "@alter-ai/github";

async function execute(input: Parameters<GitHubIntegration["repos"]["reposGetBranch"]>[0]) {
  const app = new App({ apiKey: process.env.ALTER_API_KEY! });
  try {
    const provider = new GitHubIntegration(app, { grantId: process.env.PROVIDER_GRANT_ID! });
    const call = await provider.repos.reposGetBranch(input);
    const result = await call.wait();
    return result.bodyJson();
  } finally {
    await app.close();
  }
}

import os
from alter_sdk import App
from alter_sdk_github import GitHubIntegration

async def execute(arguments):
    async with App(api_key=os.environ["ALTER_API_KEY"]) as app:
        provider = GitHubIntegration(app, {"grant_id": os.environ["PROVIDER_GRANT_ID"]})
        call = await provider.repos.repos_get_branch(arguments)
        result = await call.wait()
        return result.body_json()

Input

Field	Type	Presence	Description and constraints
`$`	object	Root	Additional keys: not allowed
`path`	object	Required within parent	Additional keys: not allowed
`path.owner`	string	Required within parent
`path.repo`	string	Required within parent
`path.branch`	string	Required within parent

Response

Response media type: application/json. The table describes the pinned successful response. Referenced models link to their complete fields.

Field	Type	Presence	Description and constraints
`$`	Model	Root	Expand Get a branch — response body

Referenced models: Get a branch — response body

Schemas

12 more schemas are linked from the tables above, on the schema pages.

Get a branch — response body

Field	Type	Presence	Description and constraints
`$`	object	Root	Branch With Protection
`_links`	object	Required within parent
`_links.html`	string	Required within parent
`_links.self`	string	Required within parent	Format: uri
`commit`	Model	Required within parent	Expand Get a commit — response body
`name`	string	Required within parent
`pattern`	string	Optional
`protected`	boolean	Required within parent
`protection`	Model	Required within parent	Expand Get branch protection — response body
`protection_url`	string	Required within parent	Format: uri
`required_approving_review_count`	JSON	Optional
`required_approving_review_count (anyOf 1)`	integer	Alternative
`required_approving_review_count (anyOf 2)`	string	Alternative	Pattern: ^-?[0-9]+(?:\.[0-9]+)?(?:[eE][+-]?[0-9]+)?$

Referenced models: Get branch protection — response body, Get a commit — response body

Get branch protection — response body

Field	Type	Presence	Description and constraints
`$`	object	Root	Branch Protection
`allow_deletions`	object	Optional
`allow_deletions.enabled`	boolean	Optional
`allow_force_pushes`	object	Optional
`allow_force_pushes.enabled`	boolean	Optional
`allow_fork_syncing`	object	Optional	Whether users can pull changes from upstream when the branch is locked. Set to `true` to allow fork syncing. Set to `false` to prevent fork syncing.
`allow_fork_syncing.enabled`	boolean	Optional	Default: false
`block_creations`	object	Optional
`block_creations.enabled`	boolean	Optional
`enabled`	boolean	Optional
`enforce_admins`	Model	Optional	Expand Get admin branch protection — response body
`lock_branch`	object	Optional	Whether to set the branch as read-only. If this is true, users will not be able to push to the branch.
`lock_branch.enabled`	boolean	Optional	Default: false
`name`	string	Optional
`protection_url`	string	Optional
`required_conversation_resolution`	object	Optional
`required_conversation_resolution.enabled`	boolean	Optional
`required_linear_history`	object	Optional
`required_linear_history.enabled`	boolean	Optional
`required_pull_request_reviews`	Model	Optional	Expand Get pull request review protection — response body
`required_signatures`	object	Optional
`required_signatures.enabled`	boolean	Required within parent
`required_signatures.url`	string	Required within parent	Format: uri
`required_status_checks`	Model	Optional	Expand Get branch protection — response body — required status checks
`restrictions`	Model	Optional	Expand Get access restrictions — response body
`url`	string	Optional

Referenced models: Get access restrictions — response body, Get admin branch protection — response body, Get pull request review protection — response body, Get branch protection — response body — required status checks

Get a commit — response body

Field	Type	Presence	Description and constraints
`$`	object	Root	Commit
`author`	JSON	Required within parent
`author (anyOf 1)`	JSON	Alternative
`author (anyOf 1) (anyOf 1)`	Model	Alternative	Expand List users — response body — item
`author (anyOf 1) (anyOf 2)`	Model	Alternative	Expand Re-run a workflow — response body
`author (anyOf 2)`	null	Alternative
`comments_url`	string	Required within parent	Format: uri
`commit`	object	Required within parent
`commit.author`	Model	Required within parent	Expand Get a commit — response body — commit author
`commit.comment_count`	JSON	Required within parent
`commit.comment_count (anyOf 1)`	integer	Alternative
`commit.comment_count (anyOf 2)`	string	Alternative	Pattern: ^-?[0-9]+(?:\.[0-9]+)?(?:[eE][+-]?[0-9]+)?$
`commit.committer`	Model	Required within parent	Expand Get a commit — response body — commit author
`commit.message`	string	Required within parent
`commit.tree`	object	Required within parent
`commit.tree.sha`	string	Required within parent
`commit.tree.url`	string	Required within parent	Format: uri
`commit.url`	string	Required within parent	Format: uri
`commit.verification`	Model	Optional	Expand Get a tag — response body — verification
`committer`	JSON	Required within parent
`committer (anyOf 1)`	JSON	Alternative
`committer (anyOf 1) (anyOf 1)`	Model	Alternative	Expand List users — response body — item
`committer (anyOf 1) (anyOf 2)`	Model	Alternative	Expand Re-run a workflow — response body
`committer (anyOf 2)`	null	Alternative
`files`	array	Optional
`files[]`	Model	Each item	Expand List pull requests files — response body — item
`html_url`	string	Required within parent	Format: uri
`node_id`	string	Required within parent
`parents`	array	Required within parent
`parents[]`	object	Each item
`parents[].html_url`	string	Optional	Format: uri
`parents[].sha`	string	Required within parent
`parents[].url`	string	Required within parent	Format: uri
`sha`	string	Required within parent
`stats`	object	Optional
`stats.additions`	JSON	Optional
`stats.additions (anyOf 1)`	integer	Alternative
`stats.additions (anyOf 2)`	string	Alternative	Pattern: ^-?[0-9]+(?:\.[0-9]+)?(?:[eE][+-]?[0-9]+)?$
`stats.deletions`	JSON	Optional
`stats.deletions (anyOf 1)`	integer	Alternative
`stats.deletions (anyOf 2)`	string	Alternative	Pattern: ^-?[0-9]+(?:\.[0-9]+)?(?:[eE][+-]?[0-9]+)?$
`stats.total`	JSON	Optional
`stats.total (anyOf 1)`	integer	Alternative
`stats.total (anyOf 2)`	string	Alternative	Pattern: ^-?[0-9]+(?:\.[0-9]+)?(?:[eE][+-]?[0-9]+)?$
`url`	string	Required within parent	Format: uri

Referenced models: List pull requests files — response body — item, Re-run a workflow — response body, Get a commit — response body — commit author, List users — response body — item, Get a tag — response body — verification

Get admin branch protection — response body

Field	Type	Presence	Description and constraints
`$`	object	Root	Protected Branch Admin Enforced
`enabled`	boolean	Required within parent
`url`	string	Required within parent	Format: uri

Get branch protection — response body — required status checks

Field	Type	Presence	Description and constraints
`$`	object	Root	Protected Branch Required Status Check
`checks`	array	Required within parent
`checks[]`	object	Each item
`checks[].app_id`	JSON	Required within parent
`checks[].app_id (anyOf 1)`	JSON	Alternative
`checks[].app_id (anyOf 1) (anyOf 1)`	integer	Alternative
`checks[].app_id (anyOf 1) (anyOf 2)`	string	Alternative	Pattern: ^-?[0-9]+(?:\.[0-9]+)?(?:[eE][+-]?[0-9]+)?$
`checks[].app_id (anyOf 2)`	null	Alternative
`checks[].context`	string	Required within parent
`contexts`	array	Required within parent
`contexts[]`	string	Each item
`contexts_url`	string	Optional
`enforcement_level`	string	Optional
`strict`	boolean	Optional
`url`	string	Optional

Policy, approvals and errors

SDK function policy ID: github.repos_get_branch. Catalog operation: repos/get-branch. Rules can name either ID; function rules distinguish managed calls and conservatively cover raw calls sharing the route. Existing grant permissions and policy rules apply. wait() returns an immediate result or waits for a required approval; it never approves the request itself. Persist the approval ID to resume after a restart.

Provider errors retain their response; JSON decoding raises ProviderAPIError for provider failures. ManagedOperationError identifies contract/input/retention errors. See error handling and provider-specific behavior. Sensitive input may be refused before approval storage. A decoding error never resubmits a write.

Pinned headers: {"X-GitHub-Api-Version": "2026-03-10", "User-Agent": "Alter", "Accept": "application/vnd.github+json"}

Official provider source

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