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Cheap poll: has this proposal's state changed since you last looked? You pass the state this route or GET /proposal-status gave you last time; it reads the Governor's current state and compares. Call it with no state to get a baseline. One contract read, which is why it is cheap; when it reports changed, buy GET /proposal-status for the new state, its execution_eta and what that means on this contract family. Terminal states (executed, defeated, canceled, expired) never change again -- the response says so explicitly and tells you to stop polling, because charging for a poll that can only ever answer 'unchanged' would be selling nothing. Required: dao and proposal_id. Optional: state.

Get tokens that moved significantly during off-hours (midnight to 8am UTC) with AI-generated analysis of what happened while you slept.

Official US Treasury reporting rates of exchange — government FX reference rates for ~170 currencies, in units of foreign currency per 1 USD, for the latest quarter. Use for accounting-grade and exotic-currency conversion the market /api/v1/forex feed lacks. Filter with `?currency=Euro`. Updated quarterly. From the US Treasury (FiscalData). From x402stock

Run ONE named check against a live endpoint

The fate of ONE already-known proposal after the vote: executed / queued in Timelock / expired / canceled. A follow-on to /dao-proposals — that route shows whether a vote is active or has passed; this one shows whether a passed vote actually reached real execution (the same class of off-chain-tracker blind spot as the Arbitrum/48M ARB case, just one step later, after the vote). Required query parameters: dao (ENS, Arbitrum, Uniswap, Compound) and proposal_id. Optimism is not yet on this list (2026-08-11 incident — its Agora fork emits ProposalCreated with a different event structure, discovery for it not yet decoded; already supported in GET /dao-proposals).

Retrieves posts from a specified user account on Bluesky.

Deterministic citation formatter — APA 7, MLA 9, Chicago 17 author-date, BibTeX. From structured fields, returns the reference entry (markdown/html/plain) + the in-text citation, reproducing published style-manual examples exactly. For full author lists use POST. Every answer signed. Free sample, no payment required: GET /play/cite

Fuzzy search pools by keyword (protocol name / pool name / asset). Resolves natural-language pool references to pool_uid for the detail/history tools.

VAULT POSITION (on-chain read): current redeemable value of a wallet's ERC-4626 vault position. Pass the pool_uid (from barker_executable_pools / barker_execution_quote) and the wallet address; Barker resolves the vault contract and reads balanceOf + convertToAssets directly on-chain, returning shares and current_value in the vault's underlying asset (value_asset, e.g. USDC).…

Historical APY trend for stablecoins vs. US Treasury benchmark over a lookback window (7–180 days). Use for 'DeFi vs treasury', 'is stablecoin APY going up', 'crypto yield trend', '稳定币利率走势'.

Retrieves data about creators associated with a pillar or category.

Live on-chain spot prices for every token on the Hyperliquid DEX (HYPE, PURR, and hundreds more), quoted in USDC: mid/mark price, previous-day price, 24h USD and base volume, circulating and total supply, and market cap — sorted by 24h volume. Spot, not derivatives: for funding/open interest use /api/v1/perps; for major-coin fiat prices use /api/v1/crypto. From x402stock

Permit2 + EIP-2612 Gas Sponsoring Demo — forces the gasless Permit2 path so a fresh wallet holding USDC but ZERO ETH can complete the flow. The CDP facilitator submits the EIP-2612 permit and the Permit2 transfer atomically in a single transaction via x402ExactPermit2Proxy.settleWithPermit. The response carries the on-chain tx hash + Basescan link so callers can confirm the permit + transfer landed together. Pay $0.001 USDC on Base mainnet.

three.ws Skill Marketplace — list active skill listings with pricing across all three.ws agents. Optionally filter by skill name to find the cheapest provider for a specific capability (e.g. inspect_model, render_avatar). Returns price atomics, chain, currency, trial offer, and time-pass terms when set by the agent owner. Use to route paid work to the cheapest agent.

three.ws Symbol Availability — given a candidate ticker symbol, check for exact and fuzzy collisions across pump.fun mints indexed by three.ws. Returns exact matches (same symbol on the same network) plus trigram-similar symbols (e.g. "USDC" vs "USDCC", "PUMP" vs "PMP"). Use before launching a token to avoid name confusion and aggregator-search dilution.

24h aggregate ON-CHAIN Polymarket flow by market, as ONE ed25519-SIGNED attestation (kind "onchain-flows"): per-market YES/NO volume split, net flow, trade counts and unique wallets over tx_hash-anchored Polygon trades only (platform='polymarket' AND tx_hash present — Kalshi's anonymous prints are excluded by construction). Honest scope: Polymarket-whale on-chain activity, NOT general crypto flows. The signed window_start/window_end are the exact bounds the aggregation ran over (window_end honours the 15-min delay); USD volumes are MODELED notionals, labeled in data_basis. Top-20 markets by volume; market titles ride outside the envelope (mutable metadata, never signed). Verify FREE offline at GET /verify.

Early opportunity signals aggregated for BSC chain.

Track capital flows from high-volume DEX participants.

The combined market regime — one read fusing the stock Fear & Greed score and velocity, VIX, insider-buying sentiment, and net liquidity into a named regime (e.g. Mixed Signals) with severity and a suggested stance, plus how the S&P 500 historically performed after similar regimes (forward 5/22-day and 1/3-month returns and win rates). From x402stock, a market & economic data API (x402, USDC).

SYNTHORA tvl-concentration: DeFi TVL drain/concentration signal — protocols anomalously losing TVL while token price has not yet repriced (temporal edge window). For liquidation and risk bots. Source: DeFiLlama. $0.03 USDC x402 Base.

Find people by name and optionally company name. Returns matching profiles.

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