How to connect Retell AI to Hermes Agent (paste one key, 67 tools)

Most guides for giving Hermes Agent Retell AI access start with registering your own OAuth app or pasting API keys into env files, then leave the token refresh and tool wiring to you. ClawLink gives Hermes a more practical Retell AI setup: pair once in the browser and your always-on Hermes agent can act on Retell AI for you, reading and doing real work on your behalf with no auth, token refresh, or tool wiring to build yourself.

Copy this prompt into Hermes to install the plugin and pair your account.

Prompt for Hermes

Set up ClawLink for Hermes and tell me when it's ready.

1. Install the plugin:
hermes plugins install ClawLink-HQ/hermes-plugin --enable

2. Start pairing. It prints an approval link, so show me the link and stop, don't wait:
hermes clawlink begin

3. I'll approve it in my browser, then reply "approved".

4. When I say approved, finish setup:
hermes clawlink finish

5. Then run `hermes clawlink test` and tell me whether ClawLink is ready.

Setup

It takes three steps to connect Hermes to Retell AI.

1
Install and pair
Install the ClawLink plugin, then pair Hermes with a one-time browser approval:
hermes plugins install ClawLink-HQ/hermes-plugin --enable
2
Connect Retell AI
Paste your API key in the dashboard.
3
Use it from chat
Ask Hermes Agent: "What can you do with Retell AI?"

Install by command

The prompt above walks Hermes through this. By hand, it is four commands and a browser approval:

hermes plugins install ClawLink-HQ/hermes-plugin --enable
hermes clawlink begin    # prints an approval link — open it and approve
hermes clawlink finish   # after approving in the browser
hermes clawlink test

Then connect Retell AI in the ClawLink dashboard — paste your Retell AI API key once.

Verify the connection by asking Hermes:

Use Retell AI to add community voice and walk me through the result in plain English.

Using a different agent?

The Hermes plugin is one client of ClawLink's MCP server. Claude Code, Cursor, Codex, or any agent that can run a shell command pairs with the same ClawLink account through the CLI:

npx -y @useclawlink/cli login

login opens the same browser approval and stores a credential locally. Once Retell AI is connected in the dashboard, that agent calls the same 67 Retell AI tools over MCP. Full setup for MCP clients and shell agents: connect apps to any AI agent.

Retell AI MCP for Hermes

Looking for a Retell AI MCP server for Hermes Agent? ClawLink connects Retell AI to Hermes Agent and exposes 67 Retell AI tools your agent can call over MCP, with hosted auth and nothing to run or maintain yourself. Using OpenClaw instead? The OpenClaw Retell AI integration works the same way.

What the Hermes Agent Retell AI integration can do

67 Retell AI tools are ready for Hermes Agent once the account is connected. The 30 below are the ones people reach for most; your agent can call all 67.

30 of 67 Retell AI tools for Hermes

Tool	What it does
Add community voice `retellai_add_community_voice`	Add a community voice from ElevenLabs to your Retell voice library. Use when you need to import a shared community voice for use in your agents.
Add knowledge base sources `retellai_add_knowledge_base_sources`	Tool to add sources (documents, URLs, text) to an existing knowledge base in Retell AI. Use when you need to add additional content to a knowledge base.
Buy a new phone number bind agents `retellai_buy_a_new_phone_number_bind_agents`	This endpoint allows purchasing a new phone number with a specified area code and binding it to designated agents for inbound and outbound calls. It requires JSON with agent IDs and area code.
Create a new outbound phone call `retellai_create_a_new_outbound_phone_call`	Initiate an outbound call by POST to '/v2/create-phone-call'. Requires 'from_number' and 'to_number' in E.164 format. Optional overrides and metadata supported.
Create a new web call `retellai_create_a_new_web_call`	The /v2/create-web-call endpoint creates a web call with a unique agent ID, returning call details like type, token, call ID, and status in JSON format, with a 201 response.
Create agent `retellai_create_agent`	Create a new voice AI agent with specified configuration. Use when you need to set up a voice-based AI agent with custom response engine, voice settings, and behavior configuration.
Create batch test `retellai_create_batch_test`	Tool to create a batch test job that runs multiple test cases against an agent. Use when you need to evaluate agent performance across multiple test scenarios simultaneously.
Create chat `retellai_create_chat`	Tool to create a new chat session with a chat agent. Use when you need to initiate a new chat conversation with a RetellAI chat agent.
Create chat agent `retellai_create_chat_agent`	Create a new chat agent with specified configuration. Use when you need to set up a chat-based AI agent with custom response engine and behavior settings.
Create chat completion `retellai_create_chat_completion`	Tool to create a chat completion for an existing chat session, generating the agent's response to a user message. Use when you need the agent to respond to user input in an ongoing chat conversation.
Create conversation flow `retellai_create_conversation_flow`	Create a new Conversation Flow that can be attached to an agent for response generation. Requires start_speaker, model_choice, and nodes. Returns conversation_flow_id and full configuration.
Create conversation flow component `retellai_create_conversation_flow_component`	Creates a new shared conversation flow component at POST '/create-conversation-flow-component'. Requires 'name' and 'nodes' array. Optional: tools, mcps, start_node_id, begin_tag_display_position.
Get agent `retellai_get_agent`	Retrieve details of a specific agent by its unique identifier
Get agent versions `retellai_get_agent_versions`	Retrieve all versions of a specific agent
Get batch test `retellai_get_batch_test`	Retrieve details and results of a specific batch test job
Get chat `retellai_get_chat`	Retrieve details of a specific chat session by chat ID
Get chat agent `retellai_get_chat_agent`	Retrieve details of a specific chat agent by its unique identifier
Get chat agent versions `retellai_get_chat_agent_versions`	Retrieve all versions of a specific chat agent by its unique identifier
Get concurrency `retellai_get_concurrency`	Retrieves the current concurrency and concurrency limits for the organization
Get conversation flow `retellai_get_conversation_flow`	Retrieve details of a specific Conversation Flow by its ID
Get conversation flow component `retellai_get_conversation_flow_component`	Retrieves a shared conversation flow component by its unique identifier
Get knowledge base `retellai_get_knowledge_base`	Retrieve details of a specific knowledge base by its unique identifier
Get retell llm `retellai_get_retell_llm`	Retrieve details of a specific Retell LLM Response Engine by its unique identifier
List agents `retellai_list_agents`	Retrieves a list of all agents associated with the account
List all chats `retellai_list_all_chats`	Retrieve a list of all chats associated with the account
List all phone numbers `retellai_list_all_phone_numbers`	Retrieves a list of all phone numbers associated with the account
List batch tests `retellai_list_batch_tests`	List batch test jobs for a response engine
List chat agents `retellai_list_chat_agents`	Retrieve a list of all chat agents associated with the account
List conversation flow components `retellai_list_conversation_flow_components`	Retrieves a list of all shared conversation flow components
List conversation flows `retellai_list_conversation_flows`	List all conversation flows that can be attached to an agent

Try it: find the Retell AI tool you need

Browse the 30 Retell AI tools

Click any tool to see exactly what Hermes can do and copy a ready-to-use prompt.

Example prompts

Use Retell AI to add community voice and walk me through the result in plain English.

Use Retell AI to add knowledge base sources and walk me through the result in plain English.

Use Retell AI to buy a new phone number bind agents and walk me through the result in plain English.

Create it in Retell AI for me, then confirm the important fields before you finish.

ClawLink vs. building it yourself

The alternative to ClawLink is usually manual API key setup plus your own token handling, permission troubleshooting, and tool plumbing for Hermes Agent. That is fine if you want to build and maintain the integration yourself. Most teams just want Retell AI working from chat.

	Manual	ClawLink
Credential handling	Collect, validate, store, and rotate the Retell AI API key yourself, then make sure every tool call uses the right account.	Users complete the hosted ClawLink setup once and the connected Retell AI account becomes available to the agent without you building credential management.
Ongoing maintenance	You own refresh logic, permission debugging, environment config, and every provider-specific edge case for Retell AI.	ClawLink handles the repetitive integration plumbing so your team can focus on the workflow instead of the infrastructure.
Agent usability	You still need to expose the right Retell AI actions to the runtime in a format your agent can reliably use.	67 tools for Retell AI are already exposed through ClawLink, so the agent can read and act from chat immediately.

ClawLink vs. Composio

Composio also exposes Retell AI to AI agents. It is developer infrastructure: Python and TypeScript SDKs, an MCP server, and a catalog past 1,000 apps, aimed at teams shipping agent products. ClawLink is built for Hermes Agent users instead. You install the plugin once, connect Retell AI in the browser, and the 67 tools above work from chat. There is no SDK and no config file, and the Retell AI key you paste at setup is stored server-side rather than kept in your environment. Choosing between them? Read the full Composio alternatives comparison.

Troubleshooting

Hermes paired but still can't use Retell AI

Pairing is a two-step handshake: run hermes clawlink begin, approve the link in your browser, then run hermes clawlink finish. If you ran finish before approving, or the approval link expired, run hermes clawlink begin again to get a fresh link. Confirm the plugin was installed with --enable, then verify with hermes clawlink test.

Connection succeeds but no tools appear

Reconnect Retell AI from the dashboard, then start a fresh chat if the runtime still has the old tool catalog loaded.

"Tool schema not loaded yet" error when calling Retell AI tools

Retell AI tool schemas load on demand the first time a tool runs and are cached after that, so this error usually clears on its own: wait a few seconds and retry the same request. If every Retell AI call keeps failing with it in a fresh chat, reconnect from the dashboard, and contact support if it still persists — that pattern points to a configuration problem on our side, not something you can fix by reconnecting again.

Retell AI returns 403 or "permission denied" on one action while others work

Two usual causes. The connected account may not have access to the specific workspace, inbox, store, or project in the request — check that first. If access looks right, the agent may have sent a placeholder value (like "YOUR_ID" or an example id from documentation) instead of a real one: ask it to run a list or search tool first, then retry the action with a real id from those results. Most failures at this stage are one of these two, not ClawLink bugs.

API key setup works but results look incomplete

Double-check that the API key for Retell AI has the right scopes or account access. A valid key can still be too limited for some reads or writes.

FAQ

Is there a Hermes Agent Retell AI integration?

Yes. ClawLink is the fastest way to connect Hermes to Retell AI: link your Retell AI account once in the browser and Hermes Agent can call the Retell AI API through 67 ready-made tools — no custom code or token handling.

How do I connect Retell AI to Hermes with ClawLink?

Install the plugin with hermes plugins install ClawLink-HQ/hermes-plugin --enable, then pair once: run hermes clawlink begin, approve the link in your browser, and run hermes clawlink finish. Connect Retell AI in the dashboard and Hermes can use it from the next message — no config files, and the Retell AI key you paste is stored server-side instead of in your environment.

How long does it take to connect Retell AI to Hermes Agent?

About two minutes. Sign in, click Connect next to Retell AI in the dashboard, authenticate, and Hermes Agent can use it from the next chat message.

Why use ClawLink instead of wiring Retell AI up myself?

Hermes paired but still can't use Retell AI

How to connect Retell AI to Hermes Agent

Setup

Install and pair

Connect Retell AI

Use it from chat