Finnhub
by @membranedev
Finnhub integration. Manage data, records, and automate workflows. Use when the user wants to interact with Finnhub data.
clawhub install finnhub-integrationπ About This Skill
name: finnhub description: | Finnhub integration. Manage data, records, and automate workflows. Use when the user wants to interact with Finnhub data. compatibility: Requires network access and a valid Membrane account (Free tier supported). license: MIT homepage: https://getmembrane.com repository: https://github.com/membranedev/application-skills metadata: author: membrane version: "1.0" categories: ""
Finnhub
Finnhub is a financial data API providing real-time stock, forex, and crypto prices. It's used by developers and investors to build applications that track market movements and perform financial analysis.
Official docs: https://finnhub.io/docs/api
Finnhub Overview
Working with Finnhub
This skill uses the Membrane CLI to interact with Finnhub. Membrane handles authentication and credentials refresh automatically β so you can focus on the integration logic rather than auth plumbing.
Install the CLI
Install the Membrane CLI so you can run membrane from the terminal:
npm install -g @membranehq/cli@latest
Authentication
membrane login --tenant --clientName=
This will either open a browser for authentication or print an authorization URL to the console, depending on whether interactive mode is available.
Headless environments: The command will print an authorization URL. Ask the user to open it in a browser. When they see a code after completing login, finish with:
membrane login complete
Add --json to any command for machine-readable JSON output.
Agent Types : claude, openclaw, codex, warp, windsurf, etc. Those will be used to adjust tooling to be used best with your harness
Connecting to Finnhub
Use membrane connection ensure to find or create a connection by app URL or domain:
membrane connection ensure "https://finnhub.io/" --json
This is the fastest way to get a connection. The URL is normalized to a domain and matched against known apps. If no app is found, one is created and a connector is built automatically.
If the returned connection has state: "READY", skip to Step 2.
#### 1b. Wait for the connection to be ready
If the connection is in BUILDING state, poll until it's ready:
npx @membranehq/cli connection get --wait --json
The --wait flag long-polls (up to --timeout seconds, default 30) until the state changes. Keep polling until state is no longer BUILDING.
The resulting state tells you what to do next:
READY β connection is fully set up. Skip to Step 2.CLIENT_ACTION_REQUIRED β the user or agent needs to do something. The clientAction object describes the required action:clientAction.type β the kind of action needed:
- "connect" β user needs to authenticate (OAuth, API key, etc.). This covers initial authentication and re-authentication for disconnected connections.
- "provide-input" β more information is needed (e.g. which app to connect to).
- clientAction.description β human-readable explanation of what's needed.
- clientAction.uiUrl (optional) β URL to a pre-built UI where the user can complete the action. Show this to the user when present.
- clientAction.agentInstructions (optional) β instructions for the AI agent on how to proceed programmatically. After the user completes the action (e.g. authenticates in the browser), poll again with membrane connection get to check if the state moved to READY.
CONFIGURATION_ERROR or SETUP_FAILED β something went wrong. Check the error field for details.Searching for actions
Search using a natural language description of what you want to do:
membrane action list --connectionId=CONNECTION_ID --intent "QUERY" --limit 10 --json
You should always search for actions in the context of a specific connection.
Each result includes id, name, description, inputSchema (what parameters the action accepts), and outputSchema (what it returns).
Popular actions
| Name | Key | Description | | --- | --- | --- | | List Stock Symbols | list-stock-symbols | Get a list of supported stock symbols for a specific exchange. | | Get General News | get-general-news | Get latest general market news by category (general, forex, crypto, merger). | | Get Earnings Calendar | get-earnings-calendar | Get earnings release calendar with EPS estimates and actual results for a date range. | | Search Symbols | search-symbols | Search for stock symbols and company names. | | Get Basic Financials | get-basic-financials | Get company financial metrics and ratios including 52-week high/low, PE ratio, beta, market cap, and more. | | Get Company Peers | get-company-peers | Get a list of peers/similar companies for a given stock symbol. | | Get Price Target | get-price-target | Get latest price target consensus from analysts, including high, low, mean, and median targets. | | Get Recommendation Trends | get-recommendation-trends | Get latest analyst recommendation trends for a company (buy, hold, sell, strong buy, strong sell counts). | | Get Company News | get-company-news | Get latest company news articles. | | Get Stock Candles | get-stock-candles | Get historical candlestick data (OHLCV) for stocks. | | Get Company Profile | get-company-profile | Get general information about a company including name, country, exchange, industry, IPO date, market capitalization,... | | Get Quote | get-quote | Get real-time quote data for US stocks. |
Running actions
membrane action run --connectionId=CONNECTION_ID --json
To pass JSON parameters:
membrane action run --connectionId=CONNECTION_ID --input '{"key": "value"}' --json
The result is in the output field of the response.
Proxy requests
When the available actions don't cover your use case, you can send requests directly to the Finnhub API through Membrane's proxy. Membrane automatically appends the base URL to the path you provide and injects the correct authentication headers β including transparent credential refresh if they expire.
membrane request CONNECTION_ID /path/to/endpoint
Common options:
| Flag | Description |
|------|-------------|
| -X, --method | HTTP method (GET, POST, PUT, PATCH, DELETE). Defaults to GET |
| -H, --header | Add a request header (repeatable), e.g. -H "Accept: application/json" |
| -d, --data | Request body (string) |
| --json | Shorthand to send a JSON body and set Content-Type: application/json |
| --rawData | Send the body as-is without any processing |
| --query | Query-string parameter (repeatable), e.g. --query "limit=10" |
| --pathParam | Path parameter (repeatable), e.g. --pathParam "id=123" |
Best practices
membrane action list --intent=QUERY (replace QUERY with your intent) to find existing actions before writing custom API calls. Pre-built actions handle pagination, field mapping, and edge cases that raw API calls miss.π Tips & Best Practices
membrane action list --intent=QUERY (replace QUERY with your intent) to find existing actions before writing custom API calls. Pre-built actions handle pagination, field mapping, and edge cases that raw API calls miss.