Koskamo

Assistable MCP

Provides AI agents with telephony capabilities including making and answering voice calls, navigating phone menus, sending and reading SMS/WhatsApp messages, and booking appointments via connected calendars.

Visit Assistable Machine Learning, Inc.

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Assistable MCP logo, by Assistable Machine Learning, Inc.Vendor evidenceStreamable HTTPNo sign-inEndpoint checked 2026-11-01Operated by Assistable Machine Learning, Inc.
MCP endpoint (Streamable HTTP)
https://api.assistable.ai/mcp
Vendor documentation

What you can do with it

  • Make and answer AI voice calls
  • Send and read SMS/WhatsApp texts
  • Navigate interactive phone menus
  • Book appointments on calendars

Source and maintenance

Vendor evidenceRegistry 1.0.0
mcp-registry: ai.assistable/assistable@1.0.0Project website

Protocol and capabilities

Server
assistable 0.4.0
MCP protocol
2025-06-18
Tools
16 advertised
Resources
Not advertised
Resource templates
Not advertised
Prompts
Not advertised
Server-advertised capabilities
{
  "tools": {
    "listChanged": true
  }
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

Tools target the CreateAssistants v3 REST API (multi-channel voice AI: voice, SMS, WhatsApp, web chat). Use search_tools with the user's intent first; it returns a small set of exact registered tool names, input schemas, annotations and the current catalog version. Then call the matching tool directly. Search results do not grant access: every operation still requires the caller's v3 API key (Authorization: Bearer ask_live_…) and the key's scopes/subaccount access. Subaccount-scoped tools take a subAccountId argument where shown. list_/get_ tools are read-only; create/update are writes; archive/delete are destructive. Auth + docs: https://www.assistable.ai/auth.md

Tools

16 advertised

search_tools
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

Search Assistable's registered MCP tools by the task the user wants to do. Returns up to 5 exact tool definitions with JSON input schemas and annotations. Use this first when you need to choose a tool; the result is not authorization to call it.

search_tools input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "query"
  ],
  "properties": {
    "limit": {
      "type": "integer",
      "maximum": 5,
      "minimum": 1,
      "description": "How many matching tools to return. Defaults to 5."
    },
    "query": {
      "type": "string",
      "maxLength": 240,
      "minLength": 2,
      "description": "A short description of the task or capability needed."
    }
  }
}
search_tools annotations
{
  "readOnlyHint": true,
  "openWorldHint": true
}
assistants_list
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

List assistants in a subaccount (excludes archived by default). Note: voice_settings and platform_tools are returned only by assistants_get, not in the list.

assistants_list input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "subAccountId"
  ],
  "properties": {
    "limit": {
      "type": "integer",
      "maximum": 100,
      "minimum": 1
    },
    "cursor": {
      "type": "string"
    },
    "subAccountId": {
      "type": "string"
    },
    "includeArchived": {
      "type": "boolean"
    }
  }
}
assistants_list annotations
{
  "readOnlyHint": true,
  "openWorldHint": true
}
assistants_get
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

Fetch an assistant's full configuration by ID. The response includes voice_settings (greeting mode, opening messages, voicemail) and platform_tools (attached platform-catalog tool names).

assistants_get input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "assistantId"
  ],
  "properties": {
    "assistantId": {
      "type": "string"
    }
  }
}
assistants_get annotations
{
  "readOnlyHint": true,
  "openWorldHint": true
}
assistants_create
Advertised by the server during the last successful anonymous check.

Create an assistant. Required: subAccountId, name. Optional config blocks (llmConfig, voiceConfig, chatConfig) mirror the dashboard create dialog. voice_settings configures call greeting mode, opening messages, and voicemail behavior; platform_tools attaches platform-catalog tools (declarative full-replace — see the field description).

assistants_create input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "subAccountId",
    "name"
  ],
  "properties": {
    "name": {
      "type": "string"
    },
    "voiceId": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ]
    },
    "llmConfig": {
      "type": "object",
      "properties": {
        "model": {
          "type": "string"
        },
        "prompt": {
          "type": "string"
        },
        "temperature": {
          "type": "number"
        }
      }
    },
    "chatConfig": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    },
    "description": {
      "type": "string"
    },
    "voiceConfig": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    },
    "subAccountId": {
      "type": "string"
    },
    "assistantType": {
      "enum": [
        "STANDARD",
        "FLOW_BUILDER"
      ],
      "type": "string"
    },
    "platform_tools": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Platform tool names to attach, e.g. [\"book_appointment\", \"send_email\"]. Declarative within the platform catalog: tools in the list are attached, catalog tools missing from the list are detached, custom tools are never touched. Omit for no change; [] detaches all platform tools. See GET /v3/tools for the catalog; custom tools attach via POST /v3/tools/{id}/assign."
    },
    "voice_settings": {
      "type": "object",
      "properties": {
        "greeting_mode": {
          "enum": [
            "dynamic",
            "fixed",
            "contact_first"
          ],
          "type": "string",
          "description": "How the assistant opens a call: `dynamic` (AI-generated opener; default), `fixed` (speaks the configured opening message verbatim), or `contact_first` (stays silent until the contact speaks)."
        },
        "voicemail_message": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "description": "Played when voicemail is detected, after which the assistant stops. Empty or `null` means the assistant hangs up on voicemail instead."
        },
        "inbound_opening_message": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "description": "Spoken opener for inbound calls. Only valid in `fixed` greeting mode. Template variables (e.g. a contact first-name placeholder) are allowed and resolve per call. `null` clears this direction."
        },
        "outbound_opening_message": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "description": "Spoken opener for outbound calls. Only valid in `fixed` greeting mode. Template variables are allowed and resolve per call. `null` clears this direction."
        },
        "enable_voicemail_detection": {
          "type": "boolean",
          "description": "Records intent only: persisted and returned on read, but voicemail detection is currently platform-managed and this flag does not yet gate runtime behavior."
        }
      }
    }
  }
}
assistants_create annotations
{
  "readOnlyHint": false,
  "destructiveHint": false
}
assistants_update
Advertised by the server during the last successful anonymous check.

Patch an assistant. Only supplied fields change; nested config blocks are upserted. voice_settings updates call greeting mode, opening messages, and voicemail behavior; platform_tools declaratively replaces the attached platform-catalog tools (an empty array detaches all — see the field description).

assistants_update input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "assistantId"
  ],
  "properties": {
    "name": {
      "type": "string"
    },
    "voiceId": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ]
    },
    "llmConfig": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    },
    "chatConfig": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    },
    "assistantId": {
      "type": "string"
    },
    "description": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ]
    },
    "voiceConfig": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    },
    "platform_tools": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Platform tool names to attach, e.g. [\"book_appointment\", \"send_email\"]. Declarative within the platform catalog: tools in the list are attached, catalog tools missing from the list are detached, custom tools are never touched. Omit for no change; [] detaches all platform tools. See GET /v3/tools for the catalog; custom tools attach via POST /v3/tools/{id}/assign."
    },
    "voice_settings": {
      "type": "object",
      "properties": {
        "greeting_mode": {
          "enum": [
            "dynamic",
            "fixed",
            "contact_first"
          ],
          "type": "string",
          "description": "How the assistant opens a call: `dynamic` (AI-generated opener; default), `fixed` (speaks the configured opening message verbatim), or `contact_first` (stays silent until the contact speaks)."
        },
        "voicemail_message": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "description": "Played when voicemail is detected, after which the assistant stops. Empty or `null` means the assistant hangs up on voicemail instead."
        },
        "inbound_opening_message": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "description": "Spoken opener for inbound calls. Only valid in `fixed` greeting mode. Template variables (e.g. a contact first-name placeholder) are allowed and resolve per call. `null` clears this direction."
        },
        "outbound_opening_message": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "description": "Spoken opener for outbound calls. Only valid in `fixed` greeting mode. Template variables are allowed and resolve per call. `null` clears this direction."
        },
        "enable_voicemail_detection": {
          "type": "boolean",
          "description": "Records intent only: persisted and returned on read, but voicemail detection is currently platform-managed and this flag does not yet gate runtime behavior."
        }
      }
    }
  }
}
assistants_update annotations
{
  "readOnlyHint": false,
  "destructiveHint": false
}
assistants_archive
Advertised by the server during the last successful anonymous check.
Advertised destructive

Archive (soft-delete) an assistant.

assistants_archive input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "assistantId"
  ],
  "properties": {
    "assistantId": {
      "type": "string"
    }
  }
}
assistants_archive annotations
{
  "readOnlyHint": false,
  "destructiveHint": true
}
tools_list
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

List tools visible to a subaccount. Pass includePrebuilt=false for only custom tools.

tools_list input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "subAccountId"
  ],
  "properties": {
    "limit": {
      "type": "integer",
      "maximum": 100,
      "minimum": 1
    },
    "cursor": {
      "type": "string"
    },
    "search": {
      "type": "string"
    },
    "subAccountId": {
      "type": "string"
    },
    "includePrebuilt": {
      "type": "boolean"
    }
  }
}
tools_list annotations
{
  "readOnlyHint": true,
  "openWorldHint": true
}
tools_get
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

Fetch a tool's full configuration.

tools_get input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "toolId"
  ],
  "properties": {
    "toolId": {
      "type": "string"
    }
  }
}
tools_get annotations
{
  "readOnlyHint": true,
  "openWorldHint": true
}
tools_create_custom
Advertised by the server during the last successful anonymous check.

Create a custom tool (toolType=CUSTOM). Name must match /^[a-zA-Z0-9_-]+$/ and be unique in the subaccount.

tools_create_custom input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "subAccountId",
    "name"
  ],
  "properties": {
    "url": {
      "type": "string",
      "format": "uri"
    },
    "name": {
      "type": "string"
    },
    "headers": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {
        "type": "string"
      }
    },
    "httpMethod": {
      "enum": [
        "GET",
        "POST",
        "PUT",
        "PATCH",
        "DELETE"
      ],
      "type": "string"
    },
    "parameters": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "name",
          "type"
        ],
        "properties": {
          "name": {
            "type": "string"
          },
          "type": {
            "type": "string"
          },
          "description": {
            "type": "string"
          }
        }
      }
    },
    "description": {
      "type": "string"
    },
    "subAccountId": {
      "type": "string"
    }
  }
}
tools_create_custom annotations
{
  "readOnlyHint": false,
  "destructiveHint": false
}
tools_update
Advertised by the server during the last successful anonymous check.

Patch a custom tool. Supplying parameters/headers replaces those rows; omit to leave them.

tools_update input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "toolId"
  ],
  "properties": {
    "url": {
      "anyOf": [
        {
          "type": "string",
          "format": "uri"
        },
        {
          "type": "null"
        }
      ]
    },
    "name": {
      "type": "string"
    },
    "toolId": {
      "type": "string"
    },
    "headers": {
      "anyOf": [
        {
          "type": "object",
          "propertyNames": {
            "type": "string"
          },
          "additionalProperties": {
            "type": "string"
          }
        },
        {
          "type": "null"
        }
      ]
    },
    "httpMethod": {
      "enum": [
        "GET",
        "POST",
        "PUT",
        "PATCH",
        "DELETE"
      ],
      "type": "string"
    },
    "parameters": {
      "anyOf": [
        {
          "type": "array",
          "items": {
            "type": "object",
            "required": [
              "name",
              "type"
            ],
            "properties": {
              "name": {
                "type": "string"
              },
              "type": {
                "type": "string"
              },
              "description": {
                "type": "string"
              }
            }
          }
        },
        {
          "type": "null"
        }
      ]
    },
    "description": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ]
    }
  }
}
tools_update annotations
{
  "readOnlyHint": false,
  "destructiveHint": false
}
tools_delete
Advertised by the server during the last successful anonymous check.
Advertised destructive

Soft-delete a custom tool.

tools_delete input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "toolId"
  ],
  "properties": {
    "toolId": {
      "type": "string"
    }
  }
}
tools_delete annotations
{
  "readOnlyHint": false,
  "destructiveHint": true
}
contacts_list
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

List contacts in a subaccount. meta.total is the number of matching contacts, so use it to answer how many contacts there are.

contacts_list input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "subAccountId"
  ],
  "properties": {
    "limit": {
      "type": "integer",
      "maximum": 100,
      "minimum": 1
    },
    "cursor": {
      "type": "string"
    },
    "search": {
      "type": "string"
    },
    "subAccountId": {
      "type": "string"
    }
  }
}
contacts_list annotations
{
  "readOnlyHint": true,
  "openWorldHint": true
}
contacts_get
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

Fetch a contact by ID.

contacts_get input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "contactId"
  ],
  "properties": {
    "contactId": {
      "type": "string"
    }
  }
}
contacts_get annotations
{
  "readOnlyHint": true,
  "openWorldHint": true
}
conversations_list
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

List conversations in a subaccount.

conversations_list input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "subAccountId"
  ],
  "properties": {
    "limit": {
      "type": "integer",
      "maximum": 100,
      "minimum": 1
    },
    "cursor": {
      "type": "string"
    },
    "subAccountId": {
      "type": "string"
    }
  }
}
conversations_list annotations
{
  "readOnlyHint": true,
  "openWorldHint": true
}
appointments_list
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

List appointments in a subaccount within an optional date range.

appointments_list input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "subAccountId"
  ],
  "properties": {
    "limit": {
      "type": "integer",
      "maximum": 100,
      "minimum": 1
    },
    "cursor": {
      "type": "string"
    },
    "endDate": {
      "type": "string"
    },
    "startDate": {
      "type": "string"
    },
    "subAccountId": {
      "type": "string"
    }
  }
}
appointments_list annotations
{
  "readOnlyHint": true,
  "openWorldHint": true
}
calls_get
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

Fetch a call (status, recording, transcript) by ID.

calls_get input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
    "callId": {
      "type": "string",
      "minLength": 1,
      "description": "Legacy alias for call_id."
    },
    "call_id": {
      "type": "string",
      "minLength": 1
    }
  }
}
calls_get annotations
{
  "readOnlyHint": true,
  "openWorldHint": true
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks
1 of 1 (100%)
Average latency
761 ms
95th percentile latency
761 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · probe · passed · 761 ms · metadata changed · 16 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http assistable-mcp https://api.assistable.ai/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).
Codex configuration
codex mcp add assistable-mcp --url https://api.assistable.ai/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable assistable-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "assistable-mcp": {
      "url": "https://api.assistable.ai/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "assistable-mcp": {
      "type": "streamableHttp",
      "url": "https://api.assistable.ai/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start assistable-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "assistable-mcp": {
      "type": "http",
      "url": "https://api.assistable.ai/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.
Gemini CLI configuration
gemini mcp add --transport http assistable-mcp https://api.assistable.ai/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.
Claude Desktop configuration
{
  "mcpServers": {
    "assistable-mcp": {
      "url": "https://api.assistable.ai/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.
Windsurf configuration
{
  "mcpServers": {
    "assistable-mcp": {
      "serverUrl": "https://api.assistable.ai/mcp"
    }
  }
}

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