How to connect Marketstack to Hermes Agent
Connect Marketstack to Hermes with ClawLink: paste your Marketstack key once and 19 tools work from chat. No MCP server to run, nothing stored on your machine.
MarketstackAPI KEYMCPStock Data Real-Time, Intraday & Historical Market Data API providing access to 125,000+ tickers across 72+ stock exchanges worldwide.. Once connected, Hermes Agent can read and act on Marketstack from chat — pairing, token refresh, and tool wiring handled for you.
Most guides for giving Hermes Agent Marketstack 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 Marketstack setup: pair once in the browser and your always-on Hermes agent can act on Marketstack 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 Marketstack.
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 Marketstack
Paste your API key in the dashboard.
- 3
Use it from chat
Ask Hermes Agent: "What can you do with Marketstack?"
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 Marketstack in the ClawLink dashboard — paste your Marketstack API key once.
Verify the connection by asking Hermes:
Pull the relevant data from Marketstack, summarize it in plain English, and point out anything that needs attention.
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 Marketstack is connected in the dashboard, that agent calls the same 19 Marketstack tools over MCP. Full setup for MCP clients and shell agents: connect apps to any AI agent.
Marketstack MCP for Hermes
Looking for a Marketstack MCP server for Hermes Agent? ClawLink connects Marketstack to Hermes Agent and exposes 19 Marketstack tools your agent can call over MCP, with hosted auth and nothing to run or maintain yourself. Using OpenClaw instead? The OpenClaw Marketstack integration works the same way.
What the Hermes Agent Marketstack integration can do
19 Marketstack tools are ready for Hermes Agent once the account is connected.
All 19 Marketstack tools for Hermes
| Tool | What it does |
|---|---|
Get dividends marketstack_get_dividends | Retrieve stock dividend data for one or more ticker symbols from Marketstack API |
Get eod marketstack_get_eod | Retrieve end-of-day (EOD) stock data for one or multiple ticker symbols |
Get exchange marketstack_get_exchange | Retrieve detailed information for a specific stock exchange by its MIC (Market Identifier Code) |
Get exchange intraday marketstack_get_exchange_intraday | Retrieve intraday stock data for symbols on a specific stock exchange (by MIC) at a chosen |
Get exchange intraday date marketstack_get_exchange_intraday_date | Retrieve intraday stock data for symbols on a specific stock exchange (by MIC) for a specific |
Get exchange intraday latest marketstack_get_exchange_intraday_latest | Retrieve the latest available intraday data for symbols on a specific stock exchange (by MIC) |
Get intraday marketstack_get_intraday | Retrieve intraday (real-time and historical) stock data for one or multiple ticker symbols at a |
Get intraday date marketstack_get_intraday_date | Retrieve intraday stock data for one or multiple ticker symbols on a specific date |
Get intraday latest marketstack_get_intraday_latest | Retrieve the latest available intraday data point(s) for one or multiple ticker symbols |
Get splits marketstack_get_splits | Retrieve stock split data for one or more stock symbols from Marketstack |
Get stock price marketstack_get_stock_price | Retrieve the real-time (last known) stock price for a ticker symbol |
Get ticker eod marketstack_get_ticker_eod | Retrieve end-of-day stock price data for a specific ticker symbol |
Get ticker eod latest marketstack_get_ticker_eod_latest | Retrieve end-of-day (EOD) stock data for the latest available date for a specific ticker |
Get ticker info marketstack_get_ticker_info | Retrieve detailed information about stock tickers including exchange, sector, and industry data |
Get ticker intraday marketstack_get_ticker_intraday | Retrieve intraday stock data for a single ticker symbol at a chosen interval |
Get ticker intraday latest marketstack_get_ticker_intraday_latest | Retrieve the latest available intraday bar for a single ticker symbol, including real-time |
List currencies marketstack_list_currencies | Retrieve a list of all supported currencies from the Marketstack API |
List exchanges marketstack_list_exchanges | Retrieve information about supported stock exchanges |
List tickers marketstack_list_tickers | Get a list of all supported stock tickers |
Try it: find the Marketstack tool you need
Browse the 19 Marketstack tools
Click any tool to see exactly what Hermes can do and copy a ready-to-use prompt.
Example prompts
Pull the relevant data from Marketstack, summarize it in plain English, and point out anything that needs attention.
Pull the relevant data from Marketstack, summarize it in plain English, and point out anything that needs attention.
Pull the relevant data from Marketstack, summarize it in plain English, and point out anything that needs attention.
Pull the relevant data from Marketstack, 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 Marketstack working from chat.
| Manual | ClawLink | |
|---|---|---|
| Credential handling | Collect, validate, store, and rotate the Marketstack API key yourself, then make sure every tool call uses the right account. | Users complete the hosted ClawLink setup once and the connected Marketstack 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 Marketstack. | 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 Marketstack actions to the runtime in a format your agent can reliably use. | 19 tools for Marketstack are already exposed through ClawLink, so the agent can read and act from chat immediately. |
ClawLink vs. Composio
Composio also exposes Marketstack 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 Marketstack in the browser, and the 19 tools above work from chat. There is no SDK and no config file, and the Marketstack 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 Marketstack
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 Marketstack 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 Marketstack tools
Marketstack 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 Marketstack 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.
Marketstack 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 Marketstack 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 Marketstack integration?
Yes. ClawLink is the fastest way to connect Hermes to Marketstack: link your Marketstack account once in the browser and Hermes Agent can call the Marketstack API through 19 ready-made tools — no custom code or token handling.
How do I connect Marketstack 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 Marketstack in the dashboard and Hermes can use it from the next message — no config files, and the Marketstack key you paste is stored server-side instead of in your environment.
How long does it take to connect Marketstack to Hermes Agent?
About two minutes. Sign in, click Connect next to Marketstack in the dashboard, authenticate, and Hermes Agent can use it from the next chat message.
Why use ClawLink instead of wiring Marketstack 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 Marketstack working from chat.
Hermes paired but still can't use Marketstack
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.
