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Persimmon MCP server

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

read 2026-10-20

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Whose server it is
  • Registry namecom.persimmonhq/persimmonverified in the MCP registry

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

When we asked itchecked 2026-10-20
  • Stateanswerschecked 2026-10-20
  • Tools3
  • Server calls itselfpersimmon
  • Server version0.1.1
  • Protocol version2025-06-18

On 2026-10-20 the server answered initialize and tools/list without a sign-in. First answer in 255 ms.

Should an agent connect itNot proven either way yet
  • Its tools do every use case we checked: Check a brand's momentum score before walking into a pitch; Map competitors and active tensions around a brand.
  • Checked on 2 of the 7 days it takes to judge reliability.

Once connected

  • For "Check a brand's momentum score before walking into a pitch", the likely first call is get_momentum_index.
  • For "Map competitors and active tensions around a brand", the likely first call is get_competitive_context.

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.

Measured dailydaily checks: 2, the first on 2026-10-20
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 2 so far
  • What an agent can do with it2 of 2 use cases
  • Answeredmeasuring2 of the 7 daily checks it takes to print a share
  • Median first answer282 ms
  • Space in an agent's context≈ 497 tokensthe definitions of all its tools (3), which an agent carries on every turn
  • Tool definitionsB · 83 of 100
  • Typed results0 of 3 toolsdeclared outputSchema: results come typed, read once
  • Not saying whether it only reads or can destroy: 3 of 3

What an agent can do with it

  • can do · Check a brand's momentum score before walking into a pitch
  • can do · Map competitors and active tensions around a brand
  • not sure · Identify whitespace and a next strategic move for a brand

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

None of the five warning signs in these definitions.

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 →

Tools it offers3 tools · read 2026-10-20
  • get_momentum_index

    Use this when an agent needs Persimmon's deterministic momentum score for a specific brand or the top of the index. Returns composite score plus four dimensions (Draw, Surge, Wedge, Hold), tier band, signal count, and last-updated…

  • get_brand_signals

    Use this when an agent needs the recent harvested signals (each with text, tier, score, and source URL) backing a brand's score. Public-citable signals only — internal-only items are filtered before emit. Always carries a coverage_status…

  • get_competitive_context

    Use this when an agent needs a brand's competitor set, peer momentum snapshots, and a deterministic competitive-position one-liner. Excludes peers without real signal coverage (scaffold tier). Always carries a coverage_status describing…

How to connect

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

{
  "mcpServers": {
    "persimmon": {
      "type": "http",
      "url": "https://mcp.persimmonhq.com/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http persimmonhq https://mcp.persimmonhq.com/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://mcp.persimmonhq.com/mcp as a custom connector in the settings.

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.