# How to connect Polymarket to Hermes Agent (paste one key, 44 tools) > Connect Polymarket to Hermes with ClawLink: paste your Polymarket key once and 44 tools work from chat. No MCP server to run, nothing stored on your machine. Web version: https://claw-link.dev/hermes/polymarket Most guides for giving Hermes Agent Polymarket 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 Polymarket setup: pair once in the browser and your always-on Hermes agent can act on Polymarket for you, reading and doing real work on your behalf with no auth, token refresh, or tool wiring to build yourself. **Start here — 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. ## Setup It takes three steps to connect Hermes to Polymarket. 1. **Install ClawLink** — add the plugin to Hermes Agent once. 2. **Connect Polymarket** — one-click OAuth in the ClawLink dashboard. 3. **Use it from chat** — ask Hermes Agent in plain English. **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 polymarket # connect Polymarket (browser OAuth) npx -y @useclawlink/cli actions polymarket # list available actions npx -y @useclawlink/cli run polymarket --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 Polymarket in the [ClawLink dashboard](https://claw-link.dev/dashboard) — paste your Polymarket API key once. Verify the connection by asking Hermes: > Use Polymarket to us get account balances 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: ```bash npx -y @useclawlink/cli login ``` `login` opens the same browser approval and stores a credential locally. Once Polymarket is connected in the dashboard, that agent calls the same 44 Polymarket 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). ## Polymarket MCP for Hermes Looking for a Polymarket MCP server for Hermes Agent? ClawLink connects Polymarket to Hermes Agent and exposes 44 Polymarket 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 Polymarket integration](https://claw-link.dev/openclaw/polymarket) works the same way. ## What the Hermes Agent Polymarket integration can do 44 Polymarket 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 44. ### 30 of 44 Polymarket tools for Hermes | Tool | What it does | |---|---| | **Us get account balances** `polymarket_us_get_account_balances` | Get the authenticated user's Polymarket US account balances | | **Us get activities** `polymarket_us_get_activities` | Get authenticated Polymarket US portfolio activities such as trades, resolutions, deposits | | **Us get event by ID** `polymarket_us_get_event_by_id` | Get one Polymarket US event by numeric ID from the public gateway API | | **Us get event by slug** `polymarket_us_get_event_by_slug` | Get one Polymarket US event by slug from the public gateway API | | **Us get league by slug** `polymarket_us_get_league_by_slug` | Get a current Polymarket US v2 league by slug | | **Us get market bbo** `polymarket_us_get_market_bbo` | Get the best bid and offer for one Polymarket US market by slug | | **Us get market book** `polymarket_us_get_market_book` | Get the public order book for one Polymarket US market by slug | | **Us get market by ID** `polymarket_us_get_market_by_id` | Get one Polymarket US market by numeric ID from the public gateway API | | **Us get market by slug** `polymarket_us_get_market_by_slug` | Get one Polymarket US market by slug from the public gateway API | | **Us get market settlement** `polymarket_us_get_market_settlement` | Get settlement information for one Polymarket US market by slug | | **Us get markets for subject** `polymarket_us_get_markets_for_subject` | Discover Polymarket US markets associated with a subject ID | | **Us get markets for subject by slug** `polymarket_us_get_markets_for_subject_by_slug` | Discover Polymarket US markets associated with a subject slug | | **Us get open orders** `polymarket_us_get_open_orders` | Get all open orders for the authenticated Polymarket US user | | **Us get order** `polymarket_us_get_order` | Get an authenticated user's Polymarket US order by exchange-assigned order ID | | **Us get series by ID** `polymarket_us_get_series_by_id` | Get a Polymarket US series by numeric ID | | **Us get sport by slug** `polymarket_us_get_sport_by_slug` | Get a current Polymarket US v2 sport by slug | | **Us get subject by ID** `polymarket_us_get_subject_by_id` | Get a Polymarket US subject entity by numeric ID | | **Us get subject by slug** `polymarket_us_get_subject_by_slug` | Get a Polymarket US subject entity by slug | | **Us get tag by ID** `polymarket_us_get_tag_by_id` | Get a Polymarket US topic, sport, or league tag by numeric ID | | **Us get tag by slug** `polymarket_us_get_tag_by_slug` | Get a Polymarket US topic, sport, or league tag by slug | | **Us get user positions** `polymarket_us_get_user_positions` | Get the authenticated user's Polymarket US trading positions across all markets or filtered by | | **Us list events** `polymarket_us_list_events` | Discover Polymarket US events from the public gateway API | | **Us list events for league** `polymarket_us_list_events_for_league` | List Polymarket US events for a current v2 league slug such as "nba" or "nfl" | | **Us list events for series** `polymarket_us_list_events_for_series` | List Polymarket US sports events for a legacy v1 series ID | | **Us list events for sport** `polymarket_us_list_events_for_sport` | List Polymarket US events for a current v2 sport slug such as "football" or "basketball" | | **Us list featured tags** `polymarket_us_list_featured_tags` | List featured Polymarket US tag sections from the public gateway API | | **Us list leagues** `polymarket_us_list_leagues` | List current Polymarket US sports leagues from the v2 public gateway API | | **Us list markets** `polymarket_us_list_markets` | Discover Polymarket US markets from the public gateway API | | **Us list series** `polymarket_us_list_series` | List Polymarket US series from the public gateway API | | **Us list sports** `polymarket_us_list_sports` | List Polymarket US sports from the current v2 public gateway API | ## Example prompts **Us Get Account Balances** > Use Polymarket to us get account balances and walk me through the result in plain English. **Us Get Activities** > Use Polymarket to us get activities and walk me through the result in plain English. **Us Get Event By Id** > Use Polymarket to us get event by id and walk me through the result in plain English. **Us Get Event By Slug** > Use Polymarket to us get event by slug and walk me through the result in plain English. ## 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 Polymarket working from chat. | | Manual | ClawLink | |---|---|---| | **Credential handling** | Collect, validate, store, and rotate the Polymarket API key yourself, then make sure every tool call uses the right account. | Users complete the hosted ClawLink setup once and the connected Polymarket 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 Polymarket. | 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 Polymarket actions to the runtime in a format your agent can reliably use. | 44 tools for Polymarket are already exposed through ClawLink, so the agent can read and act from chat immediately. | ## ClawLink vs. Composio Composio also exposes Polymarket 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 Polymarket in the browser, and the 44 tools above work from chat. There is no SDK and no config file, and the Polymarket 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 Polymarket 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 Polymarket 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 Polymarket tools Polymarket 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 Polymarket 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. ### Polymarket 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 Polymarket 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 Polymarket integration? Yes. ClawLink is the fastest way to connect Hermes to Polymarket: link your Polymarket account once in the browser and Hermes Agent can call the Polymarket API through 44 ready-made tools — no custom code or token handling. ### How do I connect Polymarket 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 Polymarket in the dashboard and Hermes can use it from the next message — no config files, and the Polymarket key you paste is stored server-side instead of in your environment. ### How long does it take to connect Polymarket to Hermes Agent? About two minutes. Sign in, click Connect next to Polymarket in the dashboard, authenticate, and Hermes Agent can use it from the next chat message. ### Why use ClawLink instead of wiring Polymarket 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 Polymarket working from chat. ### Hermes paired but still can't use Polymarket 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 No related integrations yet.