<!-- enhance-docs page=reference/mcp/canvas-render -->
<!-- enhance-docs release-sha256=7ff3d88e90f9dd4fa5ee87960f993597885d25e92abc5665bd2ecbc70cd6621b -->

# canvas.render

<span class="reference-badge">mutation</span> <span class="reference-badge">read</span>

Use when the requested change exactly matches canvas.render; read the current state first when a version or identifier may have changed.

## Before calling

- Authenticate as the accountable Enhance person.
- Use only resource identifiers returned by an earlier capability result or supplied by the person.
- Reuse clientToken only when retrying this exact mutation input.

## Input

<details class="reference-schema">
<summary>Show complete JSON Schema</summary>

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "type": "object",
 "properties": {
  "canvasId": {
   "type": "string",
   "format": "uuid",
   "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"
  },
  "expectedVersion": {
   "anyOf": [
    {
     "type": "integer",
     "exclusiveMinimum": 0,
     "maximum": 9007199254740991
    },
    {
     "type": "null"
    }
   ],
   "description": "Exact document version to render, or null to accept the current version."
  },
  "target": {
   "oneOf": [
    {
     "type": "object",
     "properties": {
      "kind": {
       "type": "string",
       "const": "content"
      }
     },
     "required": [
      "kind"
     ],
     "additionalProperties": false
    },
    {
     "type": "object",
     "properties": {
      "kind": {
       "type": "string",
       "const": "node"
      },
      "nodeId": {
       "type": "string",
       "minLength": 1,
       "maxLength": 200
      }
     },
     "required": [
      "kind",
      "nodeId"
     ],
     "additionalProperties": false
    },
    {
     "type": "object",
     "properties": {
      "kind": {
       "type": "string",
       "const": "bounds"
      },
      "bounds": {
       "type": "object",
       "properties": {
        "x": {
         "type": "number"
        },
        "y": {
         "type": "number"
        },
        "width": {
         "type": "number",
         "exclusiveMinimum": 0,
         "maximum": 100000
        },
        "height": {
         "type": "number",
         "exclusiveMinimum": 0,
         "maximum": 100000
        }
       },
       "required": [
        "x",
        "y",
        "width",
        "height"
       ],
       "additionalProperties": false
      }
     },
     "required": [
      "kind",
      "bounds"
     ],
     "additionalProperties": false
    }
   ],
   "description": "Area to render: all authored content, one stable node id, or explicit world-space bounds."
  },
  "sourceState": {
   "anyOf": [
    {
     "type": "object",
     "properties": {
      "kind": {
       "type": "string",
       "const": "recording"
      },
      "recordingId": {
       "type": "string",
       "format": "uuid",
       "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"
      },
      "atMs": {
       "type": "integer",
       "minimum": 0,
       "maximum": 9007199254740991
      }
     },
     "required": [
      "kind",
      "recordingId",
      "atMs"
     ],
     "additionalProperties": false
    },
    {
     "type": "null"
    }
   ],
   "description": "Recording moment to display while rendering its recording node, or null."
  },
  "scale": {
   "type": "number",
   "minimum": 0.1,
   "maximum": 4,
   "description": "Output pixels per canvas unit, from 0.1 through 4."
  },
  "outputPath": {
   "anyOf": [
    {
     "type": "string",
     "minLength": 1
    },
    {
     "type": "null"
    }
   ],
   "description": "Local PNG path, or null for a protected temporary artifact."
  },
  "overwrite": {
   "type": "boolean",
   "description": "Whether an existing outputPath may be replaced."
  },
  "timeoutMs": {
   "type": "integer",
   "exclusiveMinimum": 0,
   "maximum": 9007199254740991,
   "description": "Local render polling deadline in milliseconds."
  }
 },
 "required": [
  "canvasId",
  "expectedVersion",
  "target",
  "sourceState",
  "scale",
  "outputPath",
  "overwrite",
  "timeoutMs"
 ],
 "additionalProperties": false
}
```
</details>

### Example

<details class="reference-schema">
<summary>Show example input</summary>

```json
{
 "canvasId": "00000000-0000-4000-8000-000000000010",
 "expectedVersion": 1,
 "target": {
  "kind": "content"
 },
 "sourceState": null,
 "scale": 1,
 "outputPath": null,
 "overwrite": false,
 "timeoutMs": 120000
}
```
</details>

## Result

Returns a typed canvas.render result from the Enhance API without transport-specific prose.

## Recovery

- BAD_REQUEST: correct the named fields and call again.
- UNAUTHORIZED: restore Enhance authentication, then retry once.
- FORBIDDEN or NOT_FOUND: check the supplied resource and selection; do not substitute unrelated content. Ask for corrected access or scope if needed.
- CONFLICT: read the current resource, merge the intended change, and retry with its version.
- INTERNAL: run Enhance diagnostics, report the failure, and stop repeating the call.

## Continue with

- Inspect the returned image; read more structure only if the pixels reveal a discrepancy.

Compatibility: `5180126e6a3a2eccdfc390963fc7634a7c02ecbcc76c4fb1a2ad6a1d62a20d14`.