This package is retired

Status: closed, August 2026. Not maintained. The HoodGrow API it wraps is shut down, so every tool here now fails at the network call — the hosted server at https://www.hoodgrow.com/api/mcp is gone and the npm package is deprecated.

Why

HoodGrow had no paying customers and $0.81 of lifetime revenue. The cause was not this package: almost everything the API served is published free by Robinhood's own registry and readable straight off the chain, so a paid copy was a commodity with a free substitute one HTTP call away. See HoodGrow's README for the full reasoning.

Still worth reading

This is a complete, working MCP server: 14 tools with honest annotations (idempotentHint is false in pay-per-call mode, because a retried call charges again — a detail most servers get wrong), x402 payment, prepaid credits and bearer auth in one client. It was listed in the official MCP registry and passed directory review. If you are building one, the parts here work.

hoodgrow-mcp

MCP (Model Context Protocol) server for the HoodGrow Robinhood Chain stock token API — live price, corporate-action adjusted supply (ERC-8056, correct through stock splits), Morpho/Uniswap DeFi depth, corporate actions (splits, dividends), holder analytics, trade price-impact/slippage estimates, OHLC price candles for backtesting, market movers, a large-trade ("whale") feed, and a Base mainnet B20 native-equity-token registry, exposed as tools for any MCP client (Claude Desktop, Claude Code, etc). Built on the hoodgrow SDK — pays per call via x402 (USDC on Base) or uses a bearer API key, your choice.

Fastest: the hosted server (no install, no key)

HoodGrow runs the MCP server for you at https://www.hoodgrow.com/api/mcp. Every tool is read-only, so you can point an assistant at it and start asking with no install, no signup, no key:

claude mcp add --transport http hoodgrow https://www.hoodgrow.com/api/mcp

or in mcp.json / claude_desktop_config.json:

{
  "mcpServers": {
    "hoodgrow": { "type": "http", "url": "https://www.hoodgrow.com/api/mcp" }
  }
}

Then ask your assistant things like:

• "What's the corporate-action adjusted supply and 24h volume for NVDA on Robinhood Chain?"
• "Any pending stock splits or dividends in the next week?"
• "Top gainers and biggest whale trades today."

get_catalog — every listed token with live price, 24h change and adjusted supply — answers anonymously and unmetered, no key at all. The per-symbol tools ask for a free API key or an x402 payment on the first call. Anonymous access is capped at 20 requests/minute per IP, which is abuse shaping rather than billing and applies to the catalog too.

There used to be an anonymous daily budget in front of the per-symbol tools. It is gone: a budget keyed on the caller's IP is a fresh budget per address to anything calling from pooled egress, so it never actually led anyone to the paywall. Prefer running the server yourself, or need x402 pay-per-call? Use the npm package instead:

Run it yourself (npm — your own credentials)

Credentials are optional. With none set, the server starts and works: get_catalog is free and unmetered. Every other tool returns the API's 402 on its first call, as a readable tool error naming the alternatives. Set one of these to get past it:

• API key, free, self-serve — HOODGROW_API_KEY from hoodgrow.com/profile. A larger daily allowance, and a budget nobody behind the same IP can spend.
• x402, pay per call, no signup — a wallet private key (HOODGROW_PRIVATE_KEY), funded with USDC on Base. $0.05/call for the paid endpoints; no daily cap.

This package never bundles a shared HoodGrow credential, so you control what gets spent and who's billed.

Claude Desktop / Claude Code

Add to your MCP config (Claude Desktop: claude_desktop_config.json; Claude Code: claude mcp add):

{
  "mcpServers": {
    "hoodgrow": {
      "command": "npx",
      "args": ["-y", "hoodgrow-mcp"],
      "env": {
        "HOODGROW_PRIVATE_KEY": "0x..."
      }
    }
  }
}

Or with an API key instead:

{
  "mcpServers": {
    "hoodgrow": {
      "command": "npx",
      "args": ["-y", "hoodgrow-mcp"],
      "env": {
        "HOODGROW_API_KEY": "..."
      }
    }
  }
}

Never hardcode a real private key in a committed config file — only fund that wallet with what you're willing to spend on this API.

Optionally, once you've bought a credit balance with the buy_credits tool, add "HOODGROW_USE_CREDITS": "true" alongside HOODGROW_PRIVATE_KEY to have every data tool spend that balance (a cheap wallet signature) instead of paying x402 per call. See "Prepaid credits" below.

Tools

Each call returns the API's JSON response as the tool's text content. A failed request (unknown symbol, server error) comes back as an MCP tool error (isError: true) rather than crashing the server.

Prepaid credits

Buy a dollar-denominated credit balance once via x402 (buy_credits), then set HOODGROW_USE_CREDITS=true (alongside HOODGROW_PRIVATE_KEY) and restart the server: every data tool above then spends the balance with a cheap, gas-free wallet signature instead of a fresh on-chain x402 payment per call. list_credit_bundles/get_credit_balance never spend anything; only the metered data tools (get_catalog, get_token, etc.) and buy_credits itself move money.

Payment safety

x402 payments are real money and are not idempotent — a retried timed-out call can pay twice. HoodGrow's paywall only ever asks for USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base mainnet (eip155:8453), paid to 0x8520B3693a2Cf3c2bEa3a505Af3A9c1b093954c7, capped at $0.05/call — the underlying hoodgrow/@x402 dependencies handle protocol-level verification, but you're responsible for how much you fund the signing wallet with.

Rate limits

30 requests/minute per IP by default for pay-per-call use.

With no credentials at all, get_catalog still answers — it is free and unmetered — and every other tool returns a 402 on the first call.

With a free API key, the daily allowance is 40 units:

Still prefer get_token over get_catalog when you want one symbol — not because it is cheaper now, but because it returns far less to parse and carries that token's DeFi depth, which the catalog does not.

x402 pay-per-call has no daily cap at all ($0.05 per paid endpoint; the catalog is free either way), and Builder removes the cap and raises the per-minute limit to 300 — see docs.hoodgrow.com.

Development

npm install
npm run build   # tsc -> dist/
npm test        # tsx --test test/*.test.ts (mocked fetch + real in-memory MCP client/server, no network)

License

MIT