ai.firmbrain/x402-services

Best supply/lending APYs for an asset across Aave, Compound, Morpho, Spark and more, ranked by yield with TVL. Send { asset, chain? }. Rate-shop where to lend. [x402 paid tool — price $0.005; POST /api/lending/rates]

Batch link-liveness: check up to 50 URLs return 200 (dead-link detection). Send { urls: [..] }. [x402 paid tool — price $0.003; POST /api/links/check]

Distributed lock: acquire a named lock for ttlSec so only one agent proceeds. Returns acquired:false if held. Send { name, token, ttlSec? }. [x402 paid tool — price $0.003; POST /api/lock/acquire]

Release a distributed lock you hold. Send { name, token, holder? }. [x402 paid tool — price $0.003; POST /api/lock/release]

Convert raw HTML to clean, LLM-ready markdown. Strips nav/script/style noise. [x402 paid tool — price $0.003; POST /api/markdown]

Agent Memory: read a stored value by key, or omit key to list all keys in your namespace. Send { ns, token, key? }. [x402 paid tool — price $0.003; POST /api/memory/get]

Agent Memory: durable key-value storage that survives between agent runs. Write a JSON value (16KB max) under a key. First write to a namespace claims it with your secret token. Send { ns, token, key, value }. [x402 paid tool — price $0.003; POST /api/memory/set]

Full options chain for a currency & expiry: per-strike calls & puts with mark price, implied volatility, and open interest. Send { currency, expiry? }. The complete options board for BTC/ETH/SOL. [x402 paid tool — price $0.005; POST /api/options/chain]

Black-Scholes option pricing: fair value + full greeks (delta, gamma, vega, theta, rho) for ANY option, listed or not. Send { type, spot, strike, daysToExpiry, iv, rate? }. Price any crypto option, not just exchange-listed strikes. [x402 paid tool — price $0.05; POST /api/options/greeks]

Max-pain strike + put/call open-interest ratio for an expiry — the price level where option holders lose most; a positioning/magnet signal. Send { currency, expiry? }. [x402 paid tool — price $0.005; POST /api/options/maxpain]

Live crypto option quote from Deribit: mark price, IV, open interest, greeks, underlying. Send { instrument } (e.g. BTC-28AUG26-70000-C) or { currency, strike, type, expiry? }. Real listed-option pricing for BTC/ETH/SOL. [x402 paid tool — price $0.05; POST /api/options/price]

Implied-volatility term structure: ATM IV per expiry and front-month IV for a currency. Rising IV = rising expected volatility. Send { currency }. [x402 paid tool — price $0.005; POST /api/options/vol]

Perp-vs-spot basis for a coin: mark price vs spot oracle, basis %, annualized carry, and contango/backwardation signal. Send { coin }. Basis-trade and cash-and-carry signal. [x402 paid tool — price $0.005; POST /api/perps/basis]

Perpetual funding rate for a coin on Hyperliquid: current hourly rate, annualized APR, mark & spot-oracle price, open interest, 24h volume, premium, plus cross-venue funding (Hyperliquid/Binance/Bybit). Send { coin }. Core signal for perp traders and funding-rate strategies. [x402 paid tool — price $0.005; POST /api/perps/funding]

Cross-venue funding-rate arbitrage for a coin: annualized funding on Hyperliquid vs Binance vs Bybit, the spread, and the delta-neutral long/short leg to capture it. Send { coin }. Delta-neutral yield signal for funding-arb agents. [x402 paid tool — price $0.005; POST /api/perps/funding-arb]

All Hyperliquid perp markets with mark price, funding APR, open interest, 24h volume, and basis, sorted by volume, open interest, or funding. Send { limit?, sort? }. Full derivatives market map for trading agents. [x402 paid tool — price $0.005; POST /api/perps/markets]

Perp funding extremes: coins with the highest funding (crowded longs) and lowest/negative funding (crowded shorts) — squeeze and mean-reversion signals. Send { limit? }. Momentum & contrarian radar for perp traders. [x402 paid tool — price $0.005; POST /api/perps/movers]

Open interest for a coin (with USD notional) or the top perps by open interest across Hyperliquid. Send { coin } or { limit }. Positioning & liquidity depth for derivatives agents. [x402 paid tool — price $0.005; POST /api/perps/oi]

Portfolio 24h PnL: unrealized profit/loss in USD and % on current holdings, plus the biggest movers. Send { address }. Track how the book is doing. [x402 paid tool — price $0.05; POST /api/portfolio/pnl]

Portfolio concentration risk: top-holding %, HHI concentration index, stablecoin %, diversification flags. Send { address }. Spot dangerous concentration before it hurts. [x402 paid tool — price $0.05; POST /api/portfolio/risk]

FIFO realized-gains estimate for a wallet: per-token and total realized profit/loss in USD from its Base ERC-20 trade history, priced at historical closes. Send { address }. Fast cost-basis/tax estimate (not filing-grade — see notes). [x402 paid tool — price $0.05; POST /api/portfolio/taxlots]

Multi-chain wallet net worth: total USD value, per-chain breakdown, positions, and allocation % across Base, Ethereum, Arbitrum, Optimism and Polygon holdings. Send { address }. Instant cross-chain portfolio snapshot for treasury agents. [x402 paid tool — price $0.05; POST /api/portfolio/value]

Prediction-market arbitrage scanner: markets whose outcome prices sum below $1, implying a risk-free edge before fees. Send { query?, minEdgePct? }. [x402 paid tool — price $0.005; POST /api/predict/arb]

Crypto Fear & Greed index (0=extreme fear, 100=extreme greed) with weekly trend — a contrarian market-sentiment signal. Send {}. [x402 paid tool — price $0.005; POST /api/predict/feargreed]

Odds for a specific Polymarket market by slug: outcomes, probabilities, volume, liquidity. Send { slug }. [x402 paid tool — price $0.005; POST /api/predict/market]

Prediction-market implied probabilities from Polymarket: search live event markets and get outcome probabilities, volume, and end date. Send { query, limit? }. Crowd-sourced odds for any event as a data feed. [x402 paid tool — price $0.005; POST /api/predict/odds]

Highest-volume live prediction markets — what the crowd is actively pricing right now. Send { limit? }. [x402 paid tool — price $0.005; POST /api/predict/trending]

Pre-Sign Co-Pilot — the ONE call an agent makes before signing ANY transaction, on ANY chain. Returns a single GO/CAUTION/STOP verdict: will it succeed (and if it reverts, why + the exact fix), is it safe (sanctions/drainer/unlimited-approval/rug — hard STOP), true cost (gas + USD), your exact wallet balance-changes after, AND the corrected transaction to sign instead. EVM: send { chain, tx:{to,data,from?,value?}, token?, spender?, swap? }. Solana: send { chain:'solana', transaction?, outputMint?, swap? }. Non-custodial — the corrected tx comes back UNSIGNED and you sign it. The mandatory guardrail at the universal choke point before signing. [x402 paid tool — price $0.01; POST /api/preflight]

Pub/sub: fetch messages on a topic newer than a sequence number. Send { topic, token, since? }. [x402 paid tool — price $0.003; POST /api/pubsub/poll]

Pub/sub: publish a message to a topic. Send { topic, token, data }. [x402 paid tool — price $0.003; POST /api/pubsub/publish]

Task queue: pop the oldest item from a named queue (FIFO). Send { name, token }. [x402 paid tool — price $0.003; POST /api/queue/pop]

Task queue: append a JSON item to a named queue for later/other agents. Send { name, token, item }. [x402 paid tool — price $0.003; POST /api/queue/push]

Rate-limit token bucket: shared self-throttle. Returns allowed + remaining. Send { bucket, token, capacity, refillPerSec, cost? }. [x402 paid tool — price $0.003; POST /api/ratelimit]

Fetch any public web page and return clean, LLM-ready markdown (plus title and final URL). Send { url }. We handle fetching, redirects, and noise-stripping. [x402 paid tool — price $0.003; POST /api/read]

Fetch any public web page and return structured JSON: title, meta description, headings, links, text preview. Send { url }. [x402 paid tool — price $0.003; POST /api/read/structured]

Apply a regex to text and return all matches + capture groups (deterministic; LLMs guess regex wrong). Send { pattern, text, flags? }. [x402 paid tool — price $0.003; POST /api/regex]

Cross-venue arbitrage: prices a tokenized stock across every liquid Robinhood Chain pool/DEX and returns the high/low and spread %. Send { ticker, minLiquidityUsd? }. Spot mispricings between venues for on-chain arb agents. [x402 paid tool — price $0.005; POST /api/rh/arb]

Three-way basis for a tokenized stock: Lighter perp mark vs canonical onchain spot (Robinhood Chain DEX) vs last real-equity close, with each pairwise spread %. Send { ticker }. The cash-and-carry / basis-trade signal across perp, spot, and the underlying share. [x402 paid tool — price $0.05; POST /api/rh/basis]

Event catalysts for a tokenized stock, mapped from the underlying equity: next earnings date (with before/after-close timing and days away) and next dividend (ex-date, payment date, yield, annualized). Send { ticker }. Tokenized stocks gap with the real company's earnings and dividends — front-run the catalyst. [x402 paid tool — price $0.05; POST /api/rh/catalysts]

Pre-trade price-impact / slippage curve for a tokenized stock: estimated % impact to buy a set of trade sizes on the deepest venue and aggregated across venues, using a constant-product model on pool liquidity. Send { ticker, sizeUsd?, feePct? }. Size orders before you send them. Estimate only. [x402 paid tool — price $0.05; POST /api/rh/depth]

Tokenized-stock rich/cheap signal on Robinhood Chain: compares the onchain DEX token price vs the real equity's last close vs the Lighter perp mark, with each pairwise spread % and a directional NAV-convergence verdict. Send { ticker, threshold? }. The tokenized-stock basis trade in one call — is the onchain token trading rich or cheap vs the real stock right now. [x402 paid tool — price $0.05; POST /api/rh/dislocation]

Ranks Robinhood Chain tokenized-stock perps by funding carry: Lighter funding APR per ticker plus the cross-venue spread vs Binance/Bybit/Hyperliquid (funding-capture edge). Send { limit? }. Find the richest funding to harvest for tokenized-equity funding-arb agents. [x402 paid tool — price $0.05; POST /api/rh/funding-arb]

Cross-venue funding scan for every tokenized-stock perp: each ticker's funding across Lighter/Hyperliquid/Binance/Bybit, ranked by the most extreme rate, with mark price and a crowded-long/short squeeze bias. Send { limit? }. Spot the most squeezed tokenized-stock perps in one call. [x402 paid tool — price $0.05; POST /api/rh/funding-scan]

Top movers on Robinhood Chain: biggest 24h gainers (or losers) among liquid pools, with price change, liquidity, and volume. Send { limit?, direction? }. Momentum radar for the Robinhood Chain market. [x402 paid tool — price $0.005; POST /api/rh/gainers]

Overnight/weekend gap radar: while the US cash market is closed, ranks tokenized stocks by how far their 24/7 Robinhood Chain price has repriced vs the last regular-market close, with projected gap up/down at the open. Send { tickers?, limit? }. The pre-open positioning edge for tokenized-equity agents. [x402 paid tool — price $0.05; POST /api/rh/gap-radar]

Liquidity map for a tokenized stock: aggregates every indexed Robinhood Chain pool and breaks down where the liquidity lives venue by venue (Uniswap/Pleiades/Rialto/Arcus...), with each venue's liquidity, 24h volume, price, and liquidity share. Send { ticker }. Route large orders to the deepest venues and avoid thin pools. [x402 paid tool — price $0.005; POST /api/rh/liquidity-map]

Real-time price momentum for a tokenized stock on Robinhood Chain: price change over 5m/1h/6h/24h, per-window onchain volume, a volume-surge ratio (last hour vs the 24h hourly average), and an accelerating flag. Send { ticker }. Catch a tokenized stock breaking out intraday. [x402 paid tool — price $0.005; POST /api/rh/momentum]

Freshest tokens on Robinhood Chain: the newest tokenized stocks/RWAs to appear on-chain, deduped to first-seen per symbol, with age, price, liquidity, and a tokenized-equity flag. Send { limit?, equityOnly? }. First-mover asset alerts for agents that want in on new listings before the crowd. [x402 paid tool — price $0.005; POST /api/rh/new-listings]

Chainlink oracle health for a tokenized stock on Robinhood Chain: reads the live onchain Chainlink feed (latestRoundData) and compares it to the DEX spot and the real equity price, with staleness (age vs heartbeat) and deviation %. Send { ticker }. Catch stale or dislocated oracles before they trigger bad liquidations. Reads onchain via Robinhood Chain RPC. [x402 paid tool — price $0.05; POST /api/rh/oracle-deviation]

Robinhood Chain tokenized-stock perp funding: for a ticker, the live Lighter perpetual funding rate (hourly + annualized APR), mark vs index premium, open interest, and the SAME underlying's funding on Binance/Bybit/Hyperliquid for cross-venue comparison. Send { ticker }. The carry signal for agents trading tokenized-equity perps. [x402 paid tool — price $0.05; POST /api/rh/perp-funding]