Salt

{
  "_meta": {
    "io.modelcontextprotocol.registry/official": {
      "status": "active",
      "isLatest": true,
      "updatedAt": "2026-10-20T02:35:55.466498Z",
      "publishedAt": "2026-10-20T02:35:55.466498Z",
      "statusChangedAt": "2026-10-20T02:35:55.466498Z"
    }
  },
  "server": {
    "name": "ai.saltapp/salt",
    "icons": [
      {
        "src": "https://saltapp.ai/logo512.png",
        "sizes": [
          "512x512"
        ],
        "mimeType": "image/png"
      },
      {
        "src": "https://saltapp.ai/favicon.svg",
        "mimeType": "image/svg+xml"
      }
    ],
    "title": "Salt",
    "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
    "remotes": [
      {
        "url": "https://mcp.saltapp.ai/mcp",
        "type": "streamable-http",
        "headers": [
          {
            "name": "Authorization",
            "isSecret": true,
            "description": "OAuth 2.1 bearer token (\"Bearer sat_...\"), for a keyless Salt agent the connecting human owns/authorizes via saltapp.ai's OAuth flow. This is now the RECOMMENDED way to connect -- no header is required up front; an MCP client that supports OAuth discovers the flow automatically from this endpoint's 401 response (RFC 9728 Protected Resource Metadata at /.well-known/oauth-protected-resource/mcp, naming https://saltapp.ai as the authorization server). See README.md's \"Hosted server\" section."
          },
          {
            "name": "X-Salt-Api-Key",
            "isSecret": true,
            "description": "LEGACY: a pre-existing Salt agent's own API key, for the small api-key-only tool set (list_salt_agents, list_products, create_product). Sent per-request; never stored by the hosted server. Superseded by the OAuth bearer flow above for new integrations, but still supported unchanged."
          },
          {
            "name": "X-Salt-App-Id",
            "isSecret": true,
            "description": "LEGACY: paired with X-Salt-Api-Key above; the agent's numeric/user id, sent verbatim."
          }
        ]
      }
    ],
    "version": "0.3.0",
    "packages": [
      {
        "version": "0.3.0",
        "transport": {
          "type": "stdio"
        },
        "identifier": "salt-mcp",
        "runtimeHint": "npx",
        "registryType": "npm",
        "registryBaseUrl": "https://registry.npmjs.org",
        "environmentVariables": [
          {
            "name": "HOST",
            "isRequired": true,
            "description": "Salt API base URL, e.g. https://api.saltapp.ai"
          },
          {
            "name": "SALT_API_KEY",
            "isSecret": true,
            "isRequired": true,
            "description": "The Salt agent's API key. Shown once when the agent is created."
          },
          {
            "name": "SALT_APP_ID",
            "isRequired": true,
            "description": "The Salt agent's id (a UUID). Self-registration and the agent's webhook_secret endpoint return it as agent_id."
          },
          {
            "name": "APP_PUBLIC_KEY",
            "isRequired": true,
            "description": "The Salt agent's armored PGP public key."
          },
          {
            "name": "APP_PRIVATE_KEY",
            "isSecret": true,
            "isRequired": true,
            "description": "The Salt agent's armored PGP private key. Never leaves this machine."
          },
          {
            "name": "PGP_PASSPHRASE",
            "isSecret": true,
            "description": "Optional. Only if APP_PRIVATE_KEY is passphrase-protected; Salt-generated keys have none."
          },
          {
            "name": "WALLET_MASTER_KEY",
            "isSecret": true,
            "description": "Optional. Enables the create_wallet tool."
          },
          {
            "name": "CONCIERGE_AGENT_ID",
            "description": "Optional. Id of this server's configured front-door agent."
          }
        ]
      },
      {
        "transport": {
          "type": "stdio"
        },
        "identifier": "ghcr.io/0000f8/salt-mcp:v0.3.0",
        "runtimeHint": "docker",
        "registryType": "oci",
        "runtimeArguments": [
          {
            "name": "-i",
            "type": "named"
          },
          {
            "name": "--rm",
            "type": "named"
          }
        ],
        "environmentVariables": [
          {
            "name": "HOST",
            "isRequired": true,
            "description": "Salt API base URL, e.g. https://api.saltapp.ai"
          },
          {
            "name": "SALT_API_KEY",
            "isSecret": true,
            "isRequired": true,
            "description": "The Salt agent's API key. Shown once when the agent is created."
          },
          {
            "name": "SALT_APP_ID",
            "isRequired": true,
            "description": "The Salt agent's id (a UUID). Self-registration and the agent's webhook_secret endpoint return it as agent_id."
          },
          {
            "name": "APP_PUBLIC_KEY",
            "isRequired": true,
            "description": "The Salt agent's armored PGP public key."
          },
          {
            "name": "APP_PRIVATE_KEY",
            "isSecret": true,
            "isRequired": true,
            "description": "The Salt agent's armored PGP private key. Never leaves this machine."
          },
          {
            "name": "PGP_PASSPHRASE",
            "isSecret": true,
            "description": "Optional. Only if APP_PRIVATE_KEY is passphrase-protected; Salt-generated keys have none."
          },
          {
            "name": "WALLET_MASTER_KEY",
            "isSecret": true,
            "description": "Optional. Enables the create_wallet tool."
          },
          {
            "name": "CONCIERGE_AGENT_ID",
            "description": "Optional. Id of this server's configured front-door agent."
          }
        ]
      }
    ],
    "repository": {
      "url": "https://github.com/0000F8/salt-mcp",
      "source": "github"
    },
    "websiteUrl": "https://saltapp.ai",
    "description": "Your agent asks humans on Salt and gets answers: messages, tap-to-answer cards, invoices."
  }
}