# How to connect Marketstack to Hermes Agent (paste one key, 19 tools) > 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. Web version: https://claw-link.dev/hermes/marketstack 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. 1. **Install ClawLink** — add the plugin to Hermes Agent once. 2. **Connect Marketstack** — one-click OAuth in the ClawLink dashboard. 3. **Use it from chat** — ask Hermes Agent in plain English. **Paste this into Hermes to set up ClawLink:** > 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 with `hermes clawlink begin`. It prints an approval link, so show me the link and stop, don't wait. > 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. **Alternative for any agent (no plugin needed):** if the Hermes Agent plugin route isn't available or doesn't work, any AI agent with shell access can use the ClawLink CLI instead: ```bash npx -y @useclawlink/cli login # sign in via browser — no API key to paste npx -y @useclawlink/cli connect marketstack # connect Marketstack (browser OAuth) npx -y @useclawlink/cli actions marketstack # list available actions npx -y @useclawlink/cli run marketstack --input '' # execute (add --confirm for writes) ``` ### Install by command The prompt above walks Hermes through this. By hand, it is four commands and a browser approval: ```bash 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 Marketstack in the [ClawLink dashboard](https://claw-link.dev/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: ```bash npx -y @useclawlink/cli login ``` `login` 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](https://claw-link.dev/learn/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](https://claw-link.dev/learn/what-is-an-mcp-server), with [hosted auth](https://claw-link.dev/learn/oauth-for-ai-agents) and nothing to run or maintain yourself. Using OpenClaw instead? The [OpenClaw Marketstack integration](https://claw-link.dev/openclaw/marketstack) 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 | ## Example prompts **Get Dividends** > Pull the relevant data from Marketstack, summarize it in plain English, and point out anything that needs attention. **Get Eod** > Pull the relevant data from Marketstack, summarize it in plain English, and point out anything that needs attention. **Get Exchange** > Pull the relevant data from Marketstack, summarize it in plain English, and point out anything that needs attention. **Get Exchange Intraday** > 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](https://claw-link.dev/hub/composio-alternatives) comparison. ### 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. ### 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`. ## Related - [PostHog](https://claw-link.dev/hermes/posthog) — Track user behavior and feature flags - [Connect DataforSEO](https://claw-link.dev/hermes/dataforseo) — SEO data APIs for keywords, SERP, and site audits - [Metabase](https://claw-link.dev/hermes/metabase) — Metabase is an open-source business intelligence tool that lets you ask questions about your data and visualize answers as charts, graphs, and dashboards.