# How to connect Polygon.io to Hermes Agent (paste one key, 60 tools) > Connect Polygon.io to Hermes with ClawLink: paste your Polygon.io key once and 60 tools work from chat. No MCP server to run, nothing stored on your machine. Web version: https://claw-link.dev/hermes/polygon-io Most guides for giving Hermes Agent Polygon.io 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 Polygon.io setup: pair once in the browser and your always-on Hermes agent can act on Polygon.io 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 Polygon.io. 1. **Install ClawLink** — add the plugin to Hermes Agent once. 2. **Connect Polygon.io** — 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 polygon-io # connect Polygon.io (browser OAuth) npx -y @useclawlink/cli actions polygon-io # list available actions npx -y @useclawlink/cli run polygon-io --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 Polygon.io in the [ClawLink dashboard](https://claw-link.dev/dashboard) — paste your Polygon.io API key once. Verify the connection by asking Hermes: > Pull the relevant data from Polygon.io, 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 Polygon.io is connected in the dashboard, that agent calls the same 60 Polygon.io 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). ## Polygon.io MCP for Hermes Looking for a Polygon.io MCP server for Hermes Agent? ClawLink connects Polygon.io to Hermes Agent and exposes 60 Polygon.io 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 Polygon.io integration](https://claw-link.dev/openclaw/polygon-io) works the same way. ## What the Hermes Agent Polygon.io integration can do 60 Polygon.io 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 60. ### 30 of 60 Polygon.io tools for Hermes | Tool | What it does | |---|---| | **Get all tickers** `polygon_io_get_all_tickers` | Retrieve a comprehensive list of supported ticker symbols across all asset classes | | **Get condition codes** `polygon_io_get_condition_codes` | Retrieve a unified list of trade and quote condition codes and their definitions | | **Get crypto ema** `polygon_io_get_crypto_ema` | Calculate Exponential Moving Average (EMA) technical indicator for a crypto ticker | | **Get crypto macd** `polygon_io_get_crypto_macd` | Calculate Moving Average Convergence/Divergence (MACD) technical indicator for a crypto ticker | | **Get crypto open close** `polygon_io_get_crypto_open_close` | Get the open, close, high, low, and volume for a cryptocurrency pair on a specific date | | **Get crypto rsi** `polygon_io_get_crypto_rsi` | Calculate the Relative Strength Index (RSI) for a cryptocurrency ticker | | **Get crypto sma** `polygon_io_get_crypto_sma` | Calculate Simple Moving Average (SMA) technical indicator for a cryptocurrency ticker | | **Get daily open close** `polygon_io_get_daily_open_close` | Get the daily open, close, after-hours, and pre-market prices for a stock on a specific date | | **Get dividends** `polygon_io_get_dividends` | Retrieve a historical record of cash dividend distributions for a given ticker | | **Get economy inflation2** `polygon_io_get_economy_inflation2` | Retrieve key indicators of realized inflation including CPI and PCE price indexes with | | **Get ema** `polygon_io_get_ema` | Retrieve the Exponential Moving Average for a stock ticker | | **Get filing** `polygon_io_get_filing` | Retrieve detailed information about a specific SEC filing by filing ID | | **Get filing file** `polygon_io_get_filing_file` | Download a specific file from an SEC filing | | **Get forex ema** `polygon_io_get_forex_ema` | Calculate Exponential Moving Average (EMA) technical indicator for a forex pair | | **Get forex macd** `polygon_io_get_forex_macd` | Calculate Moving Average Convergence/Divergence (MACD) technical indicator for a forex pair | | **Get forex real time currency conversion** `polygon_io_get_forex_real_time_currency_conversion` | Convert amounts between currency pairs using real-time forex rates | | **Get forex rsi** `polygon_io_get_forex_rsi` | Calculate the Relative Strength Index (RSI) technical indicator for a forex pair | | **Get forex sma** `polygon_io_get_forex_sma` | Calculate Simple Moving Average (SMA) technical indicator for a forex pair | | **Get futures quotes** `polygon_io_get_futures_quotes` | Get real-time quote information for futures contracts with bid/ask prices, sizes, and timestamps | | **Get grouped daily** `polygon_io_get_grouped_daily` | Retrieve daily OHLCV data for the entire market for a given date | | **Get historic forex ticks** `polygon_io_get_historic_forex_ticks` | Get historic ticks for a currency pair on a specific date | | **Get inflation expectations** `polygon_io_get_inflation_expectations` | Retrieve inflation expectations data from the Federal Reserve, including market-based rates and | | **Get ipo data** `polygon_io_get_ipo_data` | Retrieve comprehensive information on Initial Public Offerings (IPOs), including upcoming and | | **Get labor market** `polygon_io_get_labor_market` | Retrieve labor market data including unemployment rate, labor force participation rate, average | | **Get macd** `polygon_io_get_macd` | Retrieve the Moving Average Convergence/Divergence (MACD) for a stock ticker | | **Get market holidays** `polygon_io_get_market_holidays` | Retrieve upcoming market holidays and their corresponding open/close times | | **Get market status** `polygon_io_get_market_status` | Retrieve the current trading status across major exchanges and currency markets | | **Get news** `polygon_io_get_news` | Retrieve the most recent news articles for a specified ticker | | **Get options contract overview** `polygon_io_get_options_contract_overview` | Retrieve comprehensive details about a specific options contract including contract type | | **Get options ema** `polygon_io_get_options_ema` | Calculate Exponential Moving Average (EMA) technical indicator for an options ticker | ## Example prompts **Get All Tickers** > Pull the relevant data from Polygon.io, summarize it in plain English, and point out anything that needs attention. **Get Condition Codes** > Pull the relevant data from Polygon.io, summarize it in plain English, and point out anything that needs attention. **Get Crypto Ema** > Pull the relevant data from Polygon.io, summarize it in plain English, and point out anything that needs attention. **Get Crypto Macd** > Pull the relevant data from Polygon.io, 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 Polygon.io working from chat. | | Manual | ClawLink | |---|---|---| | **Credential handling** | Collect, validate, store, and rotate the Polygon.io API key yourself, then make sure every tool call uses the right account. | Users complete the hosted ClawLink setup once and the connected Polygon.io 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 Polygon.io. | 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 Polygon.io actions to the runtime in a format your agent can reliably use. | 60 tools for Polygon.io are already exposed through ClawLink, so the agent can read and act from chat immediately. | ## ClawLink vs. Composio Composio also exposes Polygon.io 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 Polygon.io in the browser, and the 60 tools above work from chat. There is no SDK and no config file, and the Polygon.io 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 Polygon.io 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 Polygon.io 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 Polygon.io tools Polygon.io 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 Polygon.io 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. ### Polygon.io 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 Polygon.io 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 Polygon.io integration? Yes. ClawLink is the fastest way to connect Hermes to Polygon.io: link your Polygon.io account once in the browser and Hermes Agent can call the Polygon.io API through 60 ready-made tools — no custom code or token handling. ### How do I connect Polygon.io 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 Polygon.io in the dashboard and Hermes can use it from the next message — no config files, and the Polygon.io key you paste is stored server-side instead of in your environment. ### How long does it take to connect Polygon.io to Hermes Agent? About two minutes. Sign in, click Connect next to Polygon.io in the dashboard, authenticate, and Hermes Agent can use it from the next chat message. ### Why use ClawLink instead of wiring Polygon.io 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 Polygon.io working from chat. ### Hermes paired but still can't use Polygon.io 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 - [Connect PostHog](https://claw-link.dev/hermes/posthog) — Track user behavior and feature flags - [DataforSEO tools](https://claw-link.dev/hermes/dataforseo) — SEO data APIs for keywords, SERP, and site audits - [Hermes Metabase integration](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.