Jabbertoon MCP server

• Registry namecom.jabbertoon/cartoon-studioverified in the MCP registry

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

• Stateanswerschecked 2026-10-24
• Tools8
• Server calls itselfjabbertoon
• Server version1.1.0
• Protocol version2025-06-18

On 2026-10-24 the server answered initialize and tools/list without a sign-in. First answer in 154 ms.

• Its tools do Build 3D characters and props in a browser, but not Create walkable worlds and simple button-driven games.
• Checked on 3 of the 7 days it takes to judge reliability.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

• INITE MCP scoreafter a weeka score needs 7 daily checks: 3 so far
• What an agent can do with it1 of 2 use cases
• Answeredmeasuring3 of the 7 daily checks it takes to print a share
• Median first answer175 ms
• Space in an agent's context≈ 2,335 tokensthe definitions of all its tools (8), which an agent carries on every turn
• Tool definitionsA · 100 of 100
• Typed results0 of 8 toolsdeclared outputSchema: results come typed, read once

• Every tool passes all six checks.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (30%), doing the product's job (25%), definitions (20%), context (10%) and use (15%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

• get_guide

  Call this first. Returns one topic of Jabbertoon's guide as Markdown (under 20,000 characters): start (what it makes and the order of calls), cartoon (the JSON program: cast, scenes, lines, moves), text (the same cartoon as screenplay…

• list_moves

  Lists the ready-made moves a character can do (walk in, wave hello, hop, bow, slump, talk...): id, name, length in seconds, the bodies it works on (two legs, four, none), its settings with units, page and links. A does block plays one…

• list_characters

  Lists the cast in 3D: the six people (bob, ria, sunny, sam, lee, rose) and the animals (dog, cat, fox, horse, gull, and bear2, fox2, rabbit2, raccoon2, cat2 on two legs), each with the designed entry a cast entry gives it and a voice; the…

• get_move

  Returns one ready-made move: its block program as JSON, the same program as screenplay text, its length in seconds, what it works on, its settings with units, its page and links. Name it by id (c4c:beh:wave_hello), short name (wave_hello)…

• validate

  Checks a cartoon, with the editor's own checks, before anyone sees it. Give one of cartoon, program, pack, character or file. Returns errors (it will not play as written: also a character or background the site lacks) and warnings, each…

• share_link

  Turns a cartoon, a scene, a move or a character into a jabbertoon.com link: it opens in the editor (a move in its move maker). It all travels after the #: nothing is uploaded or kept. All but a character's end with &from=ai (the page says…

• build

  Builds anything (a character, an animal, a car, a house) in Jabbertoon's 3D builder from steps, as its buttons do: spine, grow, bone (a skeleton, a bone at a time), add a ready part (leg, arm, head, wing, wheel, hat ...), set, copy…

• report_problem

  Tells the people who make Jabbertoon something is wrong: a wrong answer, a check that refused a good cartoon or passed a bad one, a move that looks wrong, a link that does not open, wrong docs, something missing, or a step that was hard…