Touchstone

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

• Connection: Computer or cloud
• Transport: stdio, Streamable HTTP
• Category: Other
• You need to fill in: TOUCHSTONE_RECORDER, TOUCHSTONE_SUBJECT, TOUCHSTONE_API_KEY, TOUCHSTONE_SIGNING_KEY, Authorization

Install

Pick the AI app you use, then copy the settings.

You need

• Runs in the cloudNothing to install; it connects over the internet
• npmNode.js installed (for the npx command)

Which app do you use?

{
  "mcpServers": {
    "touchstone": {
      "command": "npx",
      "args": [
        "-y",
        "@touchstone-cv/mcp"
      ],
      "env": {
        "TOUCHSTONE_RECORDER": "your-value",
        "TOUCHSTONE_SUBJECT": "your-value",
        "TOUCHSTONE_API_KEY": "your-value",
        "TOUCHSTONE_SIGNING_KEY": "your-value",
        "TOUCHSTONE_KEY_FILE": "your-value",
        "TOUCHSTONE_BASE_URL": "your-value"
      }
    }
  }
}

claude mcp add --transport http touchstone https://touchstone.cv/mcp --header 'Authorization: your-value'

claude mcp add touchstone --env TOUCHSTONE_RECORDER=your-value --env TOUCHSTONE_SUBJECT=your-value --env TOUCHSTONE_API_KEY=your-value --env TOUCHSTONE_SIGNING_KEY=your-value --env TOUCHSTONE_KEY_FILE=your-value --env TOUCHSTONE_BASE_URL=your-value -- npx -y @touchstone-cv/mcp

{
  "mcpServers": {
    "touchstone": {
      "url": "https://touchstone.cv/mcp",
      "headers": {
        "Authorization": "your-value"
      }
    }
  }
}

{
  "mcpServers": {
    "touchstone": {
      "command": "npx",
      "args": [
        "-y",
        "@touchstone-cv/mcp"
      ],
      "env": {
        "TOUCHSTONE_RECORDER": "your-value",
        "TOUCHSTONE_SUBJECT": "your-value",
        "TOUCHSTONE_API_KEY": "your-value",
        "TOUCHSTONE_SIGNING_KEY": "your-value",
        "TOUCHSTONE_KEY_FILE": "your-value",
        "TOUCHSTONE_BASE_URL": "your-value"
      }
    }
  }
}

{
  "servers": {
    "touchstone": {
      "type": "http",
      "url": "https://touchstone.cv/mcp",
      "headers": {
        "Authorization": "your-value"
      }
    }
  }
}

{
  "servers": {
    "touchstone": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@touchstone-cv/mcp"
      ],
      "env": {
        "TOUCHSTONE_RECORDER": "your-value",
        "TOUCHSTONE_SUBJECT": "your-value",
        "TOUCHSTONE_API_KEY": "your-value",
        "TOUCHSTONE_SIGNING_KEY": "your-value",
        "TOUCHSTONE_KEY_FILE": "your-value",
        "TOUCHSTONE_BASE_URL": "your-value"
      }
    }
  }
}

Your choice stays on this device in a cookie; no account needed.

Values you fill in

• TOUCHSTONE_RECORDER required env
  Recorder public id (rec_...) to append to.
• TOUCHSTONE_SUBJECT required env
  The subject Colony sub whose key signs entries.
• TOUCHSTONE_API_KEY secret required env
  Touchstone API key (tsk_...) for the append/disclose REST calls.
• TOUCHSTONE_SIGNING_KEY secret env
  Base64 Ed25519 seed. Signs locally — the key never leaves your machine. Use this or TOUCHSTONE_KEY_FILE.
• TOUCHSTONE_KEY_FILE env
  Path to a file holding the base64 Ed25519 seed (alternative to TOUCHSTONE_SIGNING_KEY).
• TOUCHSTONE_BASE_URL env
  Override the Touchstone API base URL (defaults to https://touchstone.cv).
• Authorization secret required HTTP header
  A Touchstone API key as 'Bearer tsk_...' — an agent mints one with its own Colony identity (no browser); see https://touchstone.cv/developers

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

• ✓ Pass

  Maker matches the repo

  The registry name was verified against the domain touchstone.cv (the registry checks domain ownership)

• … Not checked yet

  Still maintained

  We have not read this repo from GitHub yet

• … Not checked yet

  Has a licence

  We have not read this repo from GitHub yet

• … Not checked yet

  Endpoint responds

  Not checked yet; we check endpoints in rotation

• … Not checked yet

  Sign-in with OAuth

  Not checked yet; we check endpoints in rotation

• … Not checked yet

  No hidden instructions in tool descriptions

  Not checked yet; we read the tool list when we check the endpoint

Compared with others in Otheri

• More stars than 0% of the other 32558 servers in this category
• Published to the registry more recently than 17% of the other 32558 servers in this category
• Basic checks equal to or better than 100% of the other 32558 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

README from the maker

# one-off, no install:

{

touchstone_disclose({ seqs: [n], reveal: { n: ["field_a", "field_b"] } })