Protoperfect MCP server

• Registry nameio.protoperfect/labsverified in the MCP registry

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

• Stateanswerschecked 2026-10-27
• Tools4
• Server calls itselfprotoperfect-labs
• Server version1.0.0
• Protocol version2025-06-18

On 2026-10-27 the server answered initialize and tools/list without a sign-in. First answer in 588 ms.

• Its tools do none of the product's use cases we checked: review AI-proposed design edits before they are applied; find where personal information is exposed online; set rules for what an agent remembers as fact.
• Checked on 6 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: 6 so far
• What an agent can do with it0 of 3 use cases
• Answeredmeasuring6 of the 7 daily checks it takes to print a share
• Median first answer664 ms
• Space in an agent's context≈ 403 tokensthe definitions of all its tools (4), which an agent carries on every turn
• Tool definitionsA · 96 of 100
• Typed results3 of 4 toolsdeclared outputSchema: results come typed, read once

• Parameters without a description: in 1 of 4

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 (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). 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 →

• search_documents

  Search Protoperfect Labs research papers, documentation and blueprints. Every word of the query must appear. Returns up to 12 matches with the best-matching section and a snippet.

• get_document

  Return any public protoperfect.io page as Markdown: research papers, documentation, the glossary and its terms, the FAQ, Studio, Games, About and the legal pages. Pass a path such as /research/warranted-agency or a full protoperfect.io URL.

• list_documents

  List public pages with their titles, URLs and summaries. Optionally limit to one section: research (papers and case studies), documentation (architecture, blueprints, glossary, FAQ) or company (home, Studio, Games, About and the other…

• define_term

  Return the Protoperfect glossary definition of a term (for example "Warranted Agency" or "Context Window"), with its category, related terms and the paper that covers it. Suggests close matches when there is no exact term.