How to connect Polymarket to Hermes Agent
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.
PolymarketAPI KEYMCPBrowse prediction markets, manage orders, and track positions. Once connected, Hermes Agent can read and act on Polymarket from chat — pairing, token refresh, and tool wiring handled for you.
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.
Copy this prompt into Hermes to install the plugin and pair your account.
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. It prints an approval link, so show me the link and stop, don't wait:
hermes clawlink begin
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.
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 Polymarket
Paste your API key in the dashboard.
- 3
Use it from chat
Ask Hermes Agent: "What can you do with Polymarket?"
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 Polymarket in the ClawLink 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:
npx -y @useclawlink/cli loginlogin 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.
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, with hosted auth and nothing to run or maintain yourself. Using OpenClaw instead? The OpenClaw Polymarket integration 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 |
Try it: find the Polymarket tool you need
Browse the 30 Polymarket tools
Click any tool to see exactly what Hermes can do and copy a ready-to-use prompt.
Example prompts
Use Polymarket to us get account balances and walk me through the result in plain English.
Use Polymarket to us get activities and walk me through the result in plain English.
Use Polymarket to us get event by id and walk me through the result in plain English.
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 comparison.
Troubleshooting
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.
FAQ
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.
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