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8 clients · secrets stay placeholders

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{
  "mcpServers": {
    "echoproof": {
      "command": "cargo",
      "args": [
        "echoproof",
        "mcp"
      ],
      "env": {
        "ANTHROPIC_API_KEY": "${ANTHROPIC_API_KEY}"
      }
    }
  }
}

claude mcp add echoproof -e "ANTHROPIC_API_KEY=${ANTHROPIC_API_KEY}" -- cargo echoproof mcp

[mcp_servers.echoproof]
command = "cargo"
args = ["echoproof", "mcp"]
env = { "ANTHROPIC_API_KEY" = "${ANTHROPIC_API_KEY}" }

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "echoproof": {
      "type": "local",
      "command": [
        "cargo",
        "echoproof",
        "mcp"
      ],
      "enabled": true,
      "environment": {
        "ANTHROPIC_API_KEY": "{env:ANTHROPIC_API_KEY}"
      }
    }
  }
}

{
  "mcpServers": {
    "echoproof": {
      "command": "cargo",
      "args": [
        "echoproof",
        "mcp"
      ],
      "env": {
        "ANTHROPIC_API_KEY": "${ANTHROPIC_API_KEY}"
      }
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=echoproof&config=eyJjb21tYW5kIjoiY2FyZ28iLCJhcmdzIjpbImVjaG9wcm9vZiIsIm1jcCJdLCJlbnYiOnsiQU5USFJPUElDX0FQSV9LRVkiOiIke0FOVEhST1BJQ19BUElfS0VZfSJ9fQ%3D%3D"
}

{
  "servers": {
    "echoproof": {
      "type": "stdio",
      "command": "cargo",
      "args": [
        "echoproof",
        "mcp"
      ],
      "env": {
        "ANTHROPIC_API_KEY": "${ANTHROPIC_API_KEY}"
      }
    }
  }
}

{
  "mcpServers": {
    "echoproof": {
      "command": "cargo",
      "args": [
        "echoproof",
        "mcp"
      ],
      "env": {
        "ANTHROPIC_API_KEY": "${ANTHROPIC_API_KEY}"
      }
    }
  }
}

extensions:
  "echoproof":
    enabled: true
    name: "echoproof"
    type: stdio
    cmd: "cargo"
    args:
      - "echoproof"
      - "mcp"
    envs:
      "ANTHROPIC_API_KEY": "${ANTHROPIC_API_KEY}"
    timeout: 300

Placeholders to fill from your own secret store: ${ANTHROPIC_API_KEY}. The registry never accepts secret values.

This is a local package: the command runs on your machine.

Quality – / 100new

Not scored: fewer than three checks apply, usually because no remote answered a credential-free probe or the server is a local package.

protocoln/a · weight 25

n/a
protocol.modern, protocol.stateless, protocol.transport, protocol.list_ttlno remote answered a protocol handshake (not probed yet, unreachable, or local-only)

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygienen/a · weight 30

n/a
tools.descriptions, tools.description_length, tools.schemas, tools.annotations, tools.directory_hints, tools.token_cost, tools.api_dumptool list unknown (behind auth, not probed, or empty)

stabilityn/a · weight 15

n/a
stability.changes, stability.rug_pulltool list unknown

dependenciesn/a · weight 15

n/a
deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

Tool list unknown · checked 2026-10-19 10:20 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 96 / 100

provenance90

livenessn/a

freshness100

hygiene100

+repository +namespace-matches-repo +website ~liveness-unmeasured +updated-4d-ago

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

package	registry	version	runtime	secrets
`echoproof`	cargo	0.4.0	–	`ANTHROPIC_API_KEY`

Tools (0)

No tools observed. Local packages are never executed by the registry.

Schemas: list_tools.

Similar MCP servers

Official server.json

{
  "name": "io.github.est57/echoproof",
  "title": "Echoproof",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "version": "0.4.0",
  "packages": [
    {
      "version": "0.4.0",
      "transport": {
        "type": "stdio"
      },
      "identifier": "echoproof",
      "registryType": "cargo",
      "packageArguments": [
        {
          "type": "positional",
          "value": "mcp"
        }
      ],
      "environmentVariables": [
        {
          "name": "ANTHROPIC_API_KEY",
          "isSecret": true,
          "description": "Used only when a check is given an intent to judge."
        }
      ]
    }
  ],
  "repository": {
    "url": "https://github.com/est57/echoproof",
    "source": "github"
  },
  "websiteUrl": "https://github.com/est57/echoproof",
  "description": "Replay real HTTP traffic against base and changed builds; flag behavior changes the intent omits."
}