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/mcpis 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 (
idempotentHintisfalsein 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_KEYfrom 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
| Tool | Price (x402) | Description |
|---|---|---|
get_catalog | free | Every listed token: symbol, name, address, price, source, 24h change, corporate-action adjusted supply, plus catalog-wide pending/recent corporate actions. No per-token DeFi — see get_token / get_defi |
get_token | $0.05 | One token by symbol (e.g. NVDA), same fields plus its DeFi depth |
get_corporate_actions | uses get_token/get_catalog above | Pending + recent corporate actions; pass a symbol to scope, omit for every tracked token |
get_defi | $0.05 | Every Morpho market a token participates in (loan OR collateral role) plus its Uniswap V3 pools — not just the single best-APY figure in get_token |
get_holders | $0.05 | Holder-count trend, 24h net supply change (real mint/burn), and top-holder concentration (optional limit, 1-50, defaults to 10) |
get_slippage | $0.05 | How much a USD-sized trade (side: "buy" | "sell") would move the price, per Uniswap V3 pool — includes bestPoolAddress/bestEffectivePrice picking the best one for you |
get_ohlc | $0.05 | OHLC price candles for backtesting (interval: "1h" | "4h" | "1d", optional from/to/limit, defaults to the last 30 days). Each candle carries volumeUsd/swapCount — USD swap volume across the token's Uniswap V3 pools — null for buckets older than the volume indexer's backfill window |
get_base_tokens | $0.05 | Base mainnet (chain 8453) B20 native-equity-token registry — a much smaller sibling of get_catalog. Pre-launch: check each token's status before treating it as tradable — "pre_launch" means no price, no DEX liquidity, no holders exist for it yet |
get_markets | $0.05 | Market movers across the whole catalog: top gainers/losers (24h change), highest 24h swap volume, and deepest Uniswap V3 liquidity (TVL). Optional limit (1-50, default 10); gainers/losers can be empty on a flat market |
get_trades | $0.05 | Recent large ("whale") trades in the stock-token Uniswap V3 pools, newest first — each with side ("buy" | "sell"), USD size, and txHash. Omit symbol for the global feed; optional limit (1-100, default 20) |
list_credit_bundles | free | Current prepaid credit bundle catalog ({id: {priceUsd, creditUsd}}) — no credentials needed |
buy_credits | one x402 payment | Pays for one bundle (bundleId arg); requires HOODGROW_PRIVATE_KEY. Balance lands once settlement confirms — check with get_credit_balance |
get_credit_balance | free | This wallet's current credit balance; requires HOODGROW_PRIVATE_KEY |
register_credit_webhook | free to register, then per delivered event | Register a credit-funded corporate-action webhook (url, optional symbols); requires HOODGROW_PRIVATE_KEY. HoodGrow POSTs each corporate_action.* event to url, signed x-hoodgrow-signature. symbols restricts delivery (and per-event billing) to those tokens — omit for all. Returns webhookSecret (shown once). Builder-subscription webhooks are set from the website instead |
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:
| Call | Units | Free-tier calls/day |
|---|---|---|
get_catalog (every token in one response) | 0 | unmetered — it is free |
| Any single-symbol tool | 1 | 40 |
| Liveness check | 0 | unmetered |
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