> ## 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.

# Create an evidence node.

> **Required scope:** write

**Required scope:** `write`

### Request body

`CreateEvidenceRequest`

<ParamField body="claim" type="string" required />

<ParamField body="compute_embedding" type="boolean" />

<ParamField body="confidence" type="number (float)" />

<ParamField body="depends_on" type="string[]" />

<ParamField body="embedding" type="number (float)[]" />

<ParamField body="evidence_type" type="object" />

<ParamField body="id" type="string" />

<ParamField body="source" type="object" />

<ParamField body="timestamp" type="string" />

### Response

`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>

### Status codes

| Code  | Meaning                                            |
| ----- | -------------------------------------------------- |
| `201` | Evidence created                                   |
| `400` | Invalid payload                                    |
| `401` | Unauthorized — missing or invalid credentials      |
| `403` | Forbidden — the key/token lacks the required scope |
| `429` | Rate limited — see Retry-After / X-RateLimit-Reset |

<RequestExample>
  ```bash cURL theme={null}
  curl --request POST \
    --url 'https://api.nsr.stateset.com/api/v1/evidence' \
    --header 'X-API-Key: YOUR_API_KEY' \
    --header 'Content-Type: application/json' \
    --data '{
    "claim": "string",
    "compute_embedding": true,
    "confidence": 1,
    "depends_on": [
      "string"
    ],
    "embedding": [
      1
    ],
    "evidence_type": {
      "0": "A",
      "1": "s",
      "2": "s",
      "3": "e",
      "4": "r",
      "5": "t",
      "6": "i",
      "7": "o",
      "8": "n"
    },
    "id": "string",
    "source": {
      "actor": "string",
      "actor_id": "string",
      "metadata": {},
      "org_id": "string"
    },
    "timestamp": "string"
  }'
  ```
</RequestExample>

<ResponseExample>
  ```json 201 theme={null}
  {
    "claim": "string",
    "confidence": 1,
    "depends_on": [
      "string"
    ],
    "embedding": [
      1
    ],
    "evidence_type": "Assertion",
    "id": "string",
    "source": {
      "actor": "string",
      "actor_id": "string",
      "metadata": {},
      "org_id": "string"
    },
    "timestamp": "2026-07-24T12:00:00Z"
  }
  ```
</ResponseExample>