# canvas.create
mutation write
Use when the requested change exactly matches canvas.create; 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
Show complete JSON Schema
```json
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object",
"properties": {
"title": {
"type": "string",
"minLength": 1,
"maxLength": 200
},
"organisationId": {
"default": null,
"anyOf": [
{
"type": "string",
"format": "uuid",
"pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"
},
{
"type": "null"
}
]
},
"sourceUrl": {
"default": null,
"anyOf": [
{
"type": "string",
"maxLength": 2048
},
{
"type": "null"
}
]
}
},
"required": [
"title",
"organisationId",
"sourceUrl"
],
"additionalProperties": false
}
```
### Example
Show example input
```json
{
"title": "x",
"organisationId": null,
"sourceUrl": null
}
```
## Result
Returns a typed canvas.create 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: list accessible resources and choose an allowed identifier.
- 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
- Read the affected canvas resource to confirm the result.
Compatibility: `63a7238867ecd394639c7a69b4b83f22323ce55ceba4b62fffbf5e3e3e163c44`.