---
title: "Create KG edge"
method: POST
path: "/api/v0/knowledge-bases/{kb_id}/graph/edges"
tags: ["Knowledge Base Graph"]
---

# Create KG edge

`POST /api/v0/knowledge-bases/{kb_id}/graph/edges`

## Request

- Base URL: `https://api.outerport.com` (the document declares no server; this is the origin it was published from)
- URL: `https://api.outerport.com/api/v0/knowledge-bases/{kb_id}/graph/edges`
- Auth: HTTP bearer
- TypeScript: <https://skmtc.dev/outerport/apis/outerport-api/docs/api/v0/knowledge-bases/:kb_id/graph/edges/post.ts> (a function with typed inputs; its response is checked against the schema)

## Path parameters

- `kb_id` string, uuid, required

## Request body

- EdgeCreateRequest
  - `edge_type_id` string, required
  - `source_public_id` string, uuid, required
  - `target_public_id` string, uuid, required
  - `attributes` object
  - `confidence` number, nullable
  - `evidence` object, nullable

## Response `200`

Successful Response

- EdgeResponse: A :class:`KGEdge`: a typed relation between two nodes, referenced by ``source_public_id`` / ``target_public_id``.
  - `id` string, uuid, required
  - `knowledge_base_id` string, uuid, required
  - `edge_type_id` string, required
  - `source_public_id` string, uuid, required
  - `target_public_id` string, uuid, required
  - `attributes` object, required
  - `confidence` number, nullable
  - `source` string, required
  - `evidence` object, nullable
  - `created_at` string, date-time, required
  - `updated_at` string, date-time, required

## Other responses

- `422`: Validation Error

## Changes

- **2026-09-25** `fcd15f6d35b4`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/outerport/apis/outerport-api/changes/api/v0/knowledge-bases/:kb_id/graph/edges/post.md)

---

[API](https://skmtc.dev/outerport/apis/outerport-api.md) - [All operations](https://skmtc.dev/outerport/apis/outerport-api/llms.txt) - [OpenAPI document](https://skmtc.dev/outerport/apis/outerport-api/revisions/08b5bf6f7f18?raw)