---
title: "Summarize External Systems"
method: GET
path: "/snapshots/{snapshot_id}/external-systems/summary"
tags: ["external-systems"]
---

# Summarize External Systems

`GET /snapshots/{snapshot_id}/external-systems/summary`

Canonical packages joined to the import evidence in the graph.

## Path parameters

- `snapshot_id` string, required

## Query parameters

- `scope` 'primary' | 'all'
- `limit` integer
- `offset` integer

## Response `200`

Successful Response

- ExternalSystemsSummaryResponse — Bounded package summaries for the external-dependency scan surface.
  - `items` ExternalSystemSummaryEntry[]
    - `package_key` string, required
    - `name` string, required
    - `display_name` string, required
    - `ecosystem` string, required
    - `category` string, required
    - `io_kind` string, nullable
    - `runtime_declared` boolean, required
    - `dev_declared` boolean, required
    - `declaration_count` integer, required
    - `manifest_count` integer, required
    - `versions` string[]
    - `versions_total` integer, required
    - `versions_truncated` boolean, required
    - `multiple_versions` boolean, required
    - `external_node_count` integer, required
    - `import_edge_count` integer, required
    - `importing_file_count` integer, required
    - `link_state` 'linked' | 'unlinked', required
  - `returned` integer
  - `total_packages` integer
  - `limit` integer
  - `offset` integer
  - `truncated` boolean
  - `scope` 'primary' | 'all'
  - `excluded_declarations` integer
  - `total_declarations` integer
  - `runtime_packages` integer
  - `dev_only_packages` integer
  - `observed_packages` integer
  - `linked_packages` integer
  - `unlinked_packages` integer
  - `linked_without_imports` integer
  - `ecosystems` string[]
  - `manifest_count` integer
  - `state` string
  - `reason` string, nullable

## Other responses

- `422` — Validation Error

---

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