Riddle MCP server

Which servers in the official MCP registry are Riddle's own, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-15

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Whose server it is

Registry namecom.riddle/creatorverified in the MCP registry

The registry name sits under riddle.com. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-15

Stateanswerschecked 2026-10-15
Tools41
Server calls itselfRiddle Creator
Server version1.0
Protocol version2025-06-18

On 2026-10-15 the server answered initialize and tools/list without a sign-in. First answer in 209 ms.

Tools it offers41 tools · read 2026-10-15

media_upload_link
Creates a single-use link for uploading ONE media file into the media library. Call it when the user has a LOCAL file for a Riddle: this server cannot receive bytes, so the upload is yours. A link expires after 5 minutes, dies on first…
media_delete
Deletes a file from the media library permanently, to clean up after yourself: an upload that turned out wrong, or a file the user no longer wants stored (it frees the storage it counted against). The file must be unused - one any Riddle…
riddle_template_create
Stores an existing Riddle as a template of its project (or of the user, for a personal Riddle), so new Riddles can be created from it with riddle_template_use. The template is a copy taken at this moment - the Riddle keeps living its own…
riddle_template_update
Changes a template's title and/or its gallery image and icon. Images come from the media library: upload with media_upload_link, pass the reported "mediaId" (stored by URL - deleting the file breaks the image). Only what you pass changes…
riddle_template_list
Lists the templates of a project (or your personal ones) - the ones made from your own Riddles with riddle_template_create, NOT Riddle's public ones, which riddle_template_public_list returns. Quick-create templates (isQuickCreate: true)…
riddle_template_public_list
Lists Riddle's public templates - the ready-made ones every account has, as opposed to riddle_template_list's own ones. They are grouped by category (the tag the Creator sorts them by), so calling this without arguments is also how you…
riddle_template_get
Reads one template, by default INCLUDING its build configuration - the same "build" shape riddle_get returns and riddle_builder_create accepts. This is how a template is ADAPTED rather than copied: edit the returned "build" (wording…
riddle_template_use
Creates a new Riddle from a template as an unchanged copy of it - content, settings and design preset - recorded as a copy of the template's Riddle (riddle_get reports it as context.duplicated). Use this whenever the template is what you…
riddle_tag_list
Lists the tags of a project as {items: [{id, name, count, bankCount}]}, unpaginated - the labels the Creator shows and riddle_list's "tags" filter selects by, and where the ids that filter takes come from. Riddle tags and question bank…
riddle_tag
Puts a tag on Riddles or takes it off again, by "action" - ONE assignment per Riddle, never the tag itself (riddle_tag_list reads the labels of a project, riddle_tag_delete removes one). "add" gives one Riddle (UUID) or many (UUIDs, max…
riddle_tag_delete
Deletes the TAG ITSELF from a project - the label, for good - and no Riddle, no question bank and no assignment. Rarely needed: untagging the last carrier already removes a tag (riddle_tag action "remove"), so this is for a leftover from…
ping
A simple tool that returns "Pong". Can be used to test connectivity and authentication to the MCP.
riddle_list
Returns a paginated list of Riddles. With the default scope "project" they come from a single project - use projectId to name it, or omit it for the project the API key is scoped to. With scope "account" they come from the entire account…
riddle_get
Reads one Riddle - or several, with UUIDs - as the compact build-configuration envelope {uuid, type, modifiedAt, build, nextBlockId, warnings, published, context}. "build" is the DRAFT and is exactly what the riddle_builder_* tools accept…
riddle_get_embed_code
Gets the HTML embed code for a Riddle by its UUID. The code is returned regardless of publish state, but the URL it embeds will not serve the Riddle until it is published.
riddle_publish
Publishes one or many Riddles, or takes them off the web again with publish: false (there is no unpublish tool). A published Riddle's public URL is the response's "context.viewUrl" - report that, never one spelled from the UUID (hosts…
riddle_rename
Renames a Riddle with the specified UUID. Returns only the confirmation of the change (uuid, title, modified state), not the entire Riddle. Only if the Riddle's origin.writableByThisKey is true (riddle_get, riddle_list)…
riddle_delete
Deletes one or many Riddles. Pass UUID for one, or UUIDs (max 100) to clean up several at once - e.g. everything riddle_list returned with origin: "api". A bulk delete is not atomic and never gives up early: a Riddle that cannot be…
riddle_move
Moves one or many Riddles into another project or into the personal project - and, given no destination, reports whether it could instead of moving anything. Pass UUID for one Riddle or UUIDs (max 100) for several. CHECK MODE: leave…
whoami
Reports the current API key: the authenticated user ("userEmail"/"userName", the latter null if never set), the project/team on a project-scoped key, whether this key has full access ("allowsFullAccess", see…
question_bank_create
Creates a new, empty question bank for the given Riddle type ("Quiz" or "Poll"). Add items with question_bank_item(action: "add"), then reference the returned "id" as "questionBankId" on a QuestionBank block of a riddle_builder_create…
question_bank_list
Lists question banks. Scope "own" (the default) lists the banks of a project - the same ones the Creator shows; pass a projectId to look into another project, omit it for the project the API key is scoped to (your personal ones on a user…
question_bank_get
Retrieves one question bank by id: title, riddleType, tags, notes, its categories/blockTypes and whether it has unpublished changes. The items themselves are question_bank_get_items, not included here. Works on a built-in template id from…
question_bank_manage
Everything that acts on a question bank as a whole, by "action" - the items themselves are question_bank_item, and the two calls that only destroy are question_bank_delete and question_bank_discard_changes. A public template id is…
question_bank_item
Adds or replaces ONE question/item of a question bank, by "action" - deleting one is question_bank_delete. There is no universal item shape: read riddle://reference/question-bank/block-type-columns before the first "add" into a bank you…
question_bank_discard_changes
Throws away every unpublished change to a question bank's items at once, resetting each of them to its last published content. Irreversible - there is no undo and no copy of the discarded draft. A pending item delete comes back; an item…
question_bank_delete
Deletes a question bank or ONE of its items - "target" says which, and nothing else deletes either. target "bank" removes the bank and every item it holds (its tags cleaned up exactly as question_bank_tag(action: "remove") does), and is…
question_bank_get_items
Lists the items of a question bank - its DRAFT content by default, or its published items with published: true. Filter by search term, blockType, category or difficultyRange - the same filters a QuestionBank block draws with. A template…
question_bank_tag
Adds a tag to a question bank or removes one from it, by tagName or tagId from riddle_tag_list - exactly one of the two, as riddle_tag does. Question bank tags and Riddle tags are ONE set per project, not two: the same tag applies to…
palette_get
Reads the palettes - colors, fonts, button styles, background settings - of a Riddle: every palette it can use (the ones inherited from the account/project default preset included) with all of their values, which one is selected, which…
palette_customize
Changes the palette (colors, fonts, button styles, background) of ONE Riddle, as a path => value map, e.g. {"bgColor": "#ffffff", "font.name": "Roboto"} - the paths are palette_get's or riddle://reference/palette/fields. Never affects…
integration_list
Lists the Google Sheets and webhook integrations of a project as {items: [{id, type, name, connectedRiddles}]}. "name" is the value a build takes as publish.integrations.googlesheets / .webhook to connect that integration to a Riddle. A…
riddle_builder_create
Builds a new Riddle of any of the nine types from a build configuration: "type" says which kind (see that argument for what each one is and what it needs at a minimum), "build" carries the content. Everything a type accepts is described…
riddle_builder_update
Edits an existing Riddle of any type with the same build configuration riddle_builder_create takes - but as a merge, not a rebuild: only the fields you send are touched, an omitted one is left exactly as it is. Blocks are addressed by…
riddle_builder_validate
Dry-runs one or many Riddle Builder creates and/or edits without creating or changing anything: per entry of "builds", the same validation the real call would apply, run against a scratch/deep-copied Riddle that is discarded before this…
reference_get
Read this server's own documentation: the block types, form field types, result blocks, palette values and response shapes the other tools expect. Every "riddle://reference/..." URI named in a tool description, a response or an error…
stats_fetch
Views/starts/submissions of one entity - "namespace" plus "entityId" says which (a project, a user, or a Riddle by UUID), "view" how deeply. "totals": one aggregate for the period. The response IS the entity's stats document: metrics sit…
project_list
Lists the projects this token has access to as {items, page, pageSize, total, hasMore} - the paging every listing of this server answers with (riddle://reference/concepts/response-envelope), here 25 per page, 100 max, so an account with…
project_get
Returns one project by id - id, name, image and the authenticated user's permission matrix for it. The id comes from project_list or from the "team" of riddle_get. The project's default Riddle settings are NOT included; they are a large…
project_get_settings
Returns the default Riddle settings every new Riddle of the project starts from - PUBLISHED and ENABLED only: "publishSettings" (privacy/DOI/OTP, email automation, tracking, data layer, ...) and "embedSettings" (iframe sizing…
riddle_preview
Shows the user the current DRAFT of a Riddle as a playable preview - the Riddle as it looks right now, published or not. Call it after riddle_builder_create or riddle_builder_update whenever the user wants to see the result (right after…

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "creator": {
      "type": "http",
      "url": "https://www.riddle.com/creator/api/v3/mcp"
    }
  }
}

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.