Can I use Retell AI as a CLI?

Yes. KosmoKrator exposes a Retell AI CLI through kosmo integrations:call and the provider shortcut command. Commands can return JSON for scripts, CI, and coding agents.

Can I expose Retell AI through MCP?

Yes. The KosmoKrator MCP gateway can expose selected Retell AI tools to clients such as Claude Code, Cursor, Codex, and other MCP-compatible tools.

Where are Retell AI credentials stored?

Retell AI credentials are configured in KosmoKrator's local integration settings and reused by CLI, Lua, and MCP gateway surfaces.

Can I deny write access for Retell AI MCP tools?

Yes. Start the gateway with --write=deny for read-only clients, or use ask/allow only for trusted workspaces.

Retell AI MCP, CLI, and Lua Integration for AI Agents

Retell AI integration docs for AI agents: MCP gateway setup, Retell AI CLI commands, Lua API reference, credentials, and function schemas.

7 functions 5 read 2 write Bearer token auth

Submit Retell AI feedback View package source

Retell AI for agents

Credentials can be configured manually in web or CLI hosts.

Use this integration from Lua code mode, the headless integrations CLI, or the KosmoKrator MCP gateway. The same package metadata powers all three surfaces.

Machine-Readable Metadata

integration_slug: retell
route_slug: retell
package: retell
auth_strategy: bearer_token Bearer token
cli_setup_supported: true
cli_runtime_supported: true
mcp_gateway_supported: true
lua_supported: true
supports_multi_account: true

Quick Links

Lua APIAgent-facing namespace and function reference. Retell AI CLIHeadless setup and direct function calls. Retell AI MCPMCP gateway setup for external clients. Submit feedbackReport missing tools, auth problems, wrong docs, or runtime issues. ContributeAdd tools or improve metadata in the integrations repo.

Retell AI MCP Client Matrix

Use these pages when a specific agent client or framework needs copy-pasteable MCP setup for Retell AI.

Retell AI CLI Matrix

Use these pages for direct Retell AI CLI workflows in scripts, CI, cron, and agent wrappers.

CI Retell AI CLI for CI. Cron Jobs Retell AI CLI for cron jobs. Shell Scripts Retell AI CLI for shell scripts. Headless Automation Retell AI CLI for headless automation. Coding Agents Retell AI CLI for coding agents.

Function Catalog

Function	Type	Parameters	Description
`retell.retell_list_calls`	Read `read`	4	List AI voice calls from Retell. Supports filtering by criteria and cursor-based pagination using before/after timestamps.
`retell.retell_get_call`	Read `read`	1	Get detailed information about a specific AI voice call, including transcript, duration, and status.
`retell.retell_create_phone_call`	Write `write`	3	Create a new AI-powered phone call using a Retell AI agent. The agent will handle the conversation automatically.
`retell.retell_list_agents`	Read `read`	0	List all AI voice agents configured in Retell AI. Returns agent IDs, names, and configuration details.
`retell.retell_get_agent`	Read `read`	1	Get detailed information about a specific AI voice agent, including its model, voice, prompt, and configuration.
`retell.retell_create_agent`	Write `write`	4	Create a new AI voice agent in Retell AI. Configure the model, voice, system prompt, and response engine.
`retell.retell_get_current_user`	Read `read`	0	Get information about the currently authenticated Retell AI user. Useful for verifying credentials and account details.