Directus vs Prismic

Directus

The built-in MCP server works under the connecting user's permissions, supports OAuth limited to the MCP endpoint and blocks deletes unless an administrator allows them. Since version 12 a licence check caps the free Core tier at 3 Studio seats, 25 collections and 5 flows, and the default tool list carries about 79 KB of instructions.

Prismic

The hosted MCP server stages every write as a draft in a release, cannot delete, and publishes only when a user with the Publisher role asks. Write tokens for the Migration, Asset and Types APIs have no scopes, no OpenAPI file was found, writes are limited to one request a second, and the acceptable use policy forbids access by scripts.

Directus

1. Connect with OAuth or an Authorization: Bearer header. Don't put the token in the URL as ?access_token=, where it can be logged
2. Use /mcp?tool_mode=registry when the client loads every tool definition. Default mode sends each tool's full instructions, about 79 KB in total
3. Read the schema tool before writing. Item payloads are untyped objects, so field names and types come only from the data model
4. Publish a version with POST /versions/{id}/promote over REST. The MCP items tool refuses system collections such as directus_versions
5. Count translation and junction tables against the 25-collection Core limit before creating collections

Prismic

1. Ask a repository Administrator to activate Prismic MCP in Settings first. Activation can take several minutes, and each environment has its own setting
2. Call list_repositories, then get_custom_type or get_shared_slice for the empty content template before create_document
3. Create a release with create_release and write into it. Call publish_release only on an explicit request, because a publish cannot be undone through MCP
4. For the Migration API send Authorization: Bearer <write token> and a repository header, one page a request, one request a second, and keep each returned id for later PUT calls
5. Upload media first (upload_asset or POST to https://asset-api.prismic.io/assets) and reference the asset id in image and media link fields