> ## Documentation Index
> Fetch the complete documentation index at: https://docs.stateset.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Get a specific evidence node and trace its full dependency chain

> **Required scope:** read

**Required scope:** `read`

### Path parameters

<ParamField path="id" type="string" required>
  Evidence node ID
</ParamField>

### Response

`EvidenceChainResponse`

<ResponseField name="chain" type="EvidenceNode[]" required>
  <Expandable title="EvidenceNode">
    <ResponseField name="claim" type="string" required>
      The claim or fact this evidence supports
    </ResponseField>

    <ResponseField name="confidence" type="number (float)" required>
      Confidence in this evidence
    </ResponseField>

    <ResponseField name="depends_on" type="string[]" required>
      IDs of evidence nodes this depends on
    </ResponseField>

    <ResponseField name="embedding" type="number (float)[]">
      Optional vector embedding for semantic search.
    </ResponseField>

    <ResponseField name="evidence_type" type="EvidenceType" required />

    <ResponseField name="id" type="string" required>
      Unique node ID
    </ResponseField>

    <ResponseField name="source" type="EvidenceSourceMeta" required>
      <Expandable title="EvidenceSourceMeta">
        <ResponseField name="actor" type="string" required>
          Who/what created this evidence
        </ResponseField>

        <ResponseField name="actor_id" type="string">
          API key or session ID
        </ResponseField>

        <ResponseField name="metadata" type="object" required>
          Free-form metadata
        </ResponseField>

        <ResponseField name="org_id" type="string">
          Organization
        </ResponseField>
      </Expandable>
    </ResponseField>

    <ResponseField name="timestamp" type="string (date-time)" required>
      Timestamp when evidence was recorded
    </ResponseField>
  </Expandable>
</ResponseField>

<ResponseField name="depth" type="integer" required />

### Status codes

| Code  | Meaning                                            |
| ----- | -------------------------------------------------- |
| `200` | Evidence chain                                     |
| `401` | Unauthorized — missing or invalid credentials      |
| `403` | Forbidden — the key/token lacks the required scope |
| `404` | Evidence node not found                            |
| `429` | Rate limited — see Retry-After / X-RateLimit-Reset |

<RequestExample>
  ```bash cURL theme={null}
  curl --request GET \
    --url 'https://api.nsr.stateset.com/api/v1/evidence/{id}/chain' \
    --header 'X-API-Key: YOUR_API_KEY'
  ```
</RequestExample>

<ResponseExample>
  ```json 200 theme={null}
  {
    "chain": [
      {
        "claim": "string",
        "confidence": 7.5,
        "depends_on": [],
        "embedding": [],
        "evidence_type": "Assertion",
        "id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
        "source": {
          "actor": null,
          "actor_id": null,
          "metadata": null,
          "org_id": null
        },
        "timestamp": "2026-08-31T14:22:05Z"
      }
    ],
    "depth": 1
  }
  ```
</ResponseExample>