How to connect Nango to Hermes Agent
Connect Nango to Hermes with ClawLink: paste your Nango key once and 24 tools work from chat. No MCP server to run, nothing stored on your machine.
NangoAPI KEYMCPNango provides a unified API to integrate with over 250 external APIs, offering pre-built and customizable integrations for various categories such as CRM, HR, and accounting systems.. Once connected, Hermes Agent can read and act on Nango from chat — pairing, token refresh, and tool wiring handled for you.
Most guides for giving Hermes Agent Nango 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 Nango setup: pair once in the browser and your always-on Hermes agent can act on Nango for you, reading and doing real work on your behalf with no auth, token refresh, or tool wiring to build yourself.
Setup
It takes three steps to connect Hermes to Nango.
1Install 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 Nango
Paste your API key in the dashboard.
- 3
Use it from chat
Ask Hermes Agent: "What can you do with Nango?"
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 testThen connect Nango in the ClawLink dashboard — paste your Nango API key once.
Verify the connection by asking Hermes:
Use Nango to connection get 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 loginlogin opens the same browser approval and stores a credential locally. Once Nango is connected in the dashboard, that agent calls the same 24 Nango tools over MCP. Full setup for MCP clients and shell agents: connect apps to any AI agent.
Nango MCP for Hermes
Looking for a Nango MCP server for Hermes Agent? ClawLink connects Nango to Hermes Agent and exposes 24 Nango tools your agent can call over MCP, with hosted auth and nothing to run or maintain yourself. Using OpenClaw instead? The OpenClaw Nango integration works the same way.
What the Hermes Agent Nango integration can do
24 Nango tools are ready for Hermes Agent once the account is connected. The 22 below are the ones people reach for most; your agent can call all 24.
22 of 24 Nango tools for Hermes
| Tool | What it does |
|---|---|
Connection get nango_connection_get | List all Nango connections without credentials |
Get connection nango_get_connection | Retrieve a specific connection with its credentials |
Get environment variables nango_get_environment_variables | Retrieve environment variables from the Nango dashboard |
Get integration nango_get_integration | Retrieve detailed configuration for a specific Nango integration by its unique key |
Get proxy nango_get_proxy | Make a GET request with Nango's Proxy to forward requests to external APIs while managing |
Get sync status nango_get_sync_status | Get the status of specified sync(s) for a connection or all connections |
List connections nango_list_connections | List all connections without credentials |
List integrations nango_list_integrations | Retrieve a list of all configured integrations |
Providers get get nango_providers_get_get | Retrieve detailed configuration for a specific Nango provider by its unique key |
Providers list get nango_providers_list_get | Retrieve a list of all available providers |
Scripts config get nango_scripts_config_get | Retrieve all integration functions configuration from Nango |
Action trigger post nango_action_trigger_post | Trigger a Nango action to execute a workflow or operation |
Add connection nango_add_connection | Add a connection with existing credentials to Nango |
Create connect session nango_create_connect_session | Create a new connect session with a 30-minute lifespan for enabling connection creation via |
Create integration nango_create_integration | Create a new integration in Nango |
Edit connection nango_edit_connection | Edit a connection's tags and metadata |
Put proxy nango_put_proxy | Make a PUT request with the Nango Proxy to forward requests to external APIs while managing |
Reconnect session post nango_reconnect_session_post | Create a new connect session to reconnect to a specific integration |
Set connection metadata nango_set_connection_metadata | Set custom metadata for one or more Nango connections |
Sync trigger post nango_sync_trigger_post | Trigger sync process(es) manually |
Update connection metadata nango_update_connection_metadata | Edit custom metadata for one or multiple connections |
Update integration nango_update_integration | Update an existing integration's configuration |
Try it: find the Nango tool you need
Browse the 22 Nango tools
Click any tool to see exactly what Hermes can do and copy a ready-to-use prompt.
Example prompts
Use Nango to connection get and walk me through the result in plain English.
Pull the relevant data from Nango, summarize it in plain English, and point out anything that needs attention.
Pull the relevant data from Nango, summarize it in plain English, and point out anything that needs attention.
Pull the relevant data from Nango, summarize it in plain English, and point out anything that needs attention.
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 Nango working from chat.
| Manual | ClawLink | |
|---|---|---|
| Credential handling | Collect, validate, store, and rotate the Nango API key yourself, then make sure every tool call uses the right account. | Users complete the hosted ClawLink setup once and the connected Nango 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 Nango. | 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 Nango actions to the runtime in a format your agent can reliably use. | 24 tools for Nango are already exposed through ClawLink, so the agent can read and act from chat immediately. |
ClawLink vs. Composio
Composio also exposes Nango 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 Nango in the browser, and the 24 tools above work from chat. There is no SDK and no config file, and the Nango 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 Nango
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 Nango 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 Nango tools
Nango 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 Nango 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.
Nango 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 Nango 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 Nango integration?
Yes. ClawLink is the fastest way to connect Hermes to Nango: link your Nango account once in the browser and Hermes Agent can call the Nango API through 24 ready-made tools — no custom code or token handling.
How do I connect Nango 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 Nango in the dashboard and Hermes can use it from the next message — no config files, and the Nango key you paste is stored server-side instead of in your environment.
How long does it take to connect Nango to Hermes Agent?
About two minutes. Sign in, click Connect next to Nango in the dashboard, authenticate, and Hermes Agent can use it from the next chat message.
Why use ClawLink instead of wiring Nango up myself?
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 Nango working from chat.
Hermes paired but still can't use Nango
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.
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