Search 300,000+ US government datasets on catalog.data.gov (Catalog API): titles, publishing org, formats, and direct resource URLs - the index agents need before fetching public data.

The live feed a Kalshi event settles on, from Kalshi's free live_data tier: a crypto event returns the CF Benchmarks price series, candlesticks (15M, 1M) and the maturity time; an economic-data event (CPI, jobs) returns the provider's series with the target period. Pass an eventTicker, or a seriesTicker (e.g. KXBTC) and the soonest open event is resolved for you. The type field names the schema of details.

Pull emails, URLs, IPv4s, @mentions, and #hashtags out of free text. Returns deduped lists.

Who owns this NFT? Calls ownerOf(tokenId) on any ERC-721 contract on Ethereum, Base, Polygon, Arbitrum, or Optimism. Complements nft-holdings (which lists a WALLET's NFTs) - this answers by TOKEN. Keyless multi-endpoint failover.

List EAS (Ethereum Attestation Service) attestations for an address as recipient, attester, or either, on mainnet/Base/Optimism/Arbitrum/Sepolia. Returns attestation id, attester, recipient, schema id, revocable/revoked flags, timestamp, and decoded data JSON. Use to verify Gitcoin Passport stamps, Coinbase verifications, KYC attestations, or any other on-chain claim about an address.

Fetch page metadata for a URL: title, description, OpenGraph, Twitter cards, canonical URL, favicon.

Score an OpenAPI 3.x or Swagger 2.x spec on agent-readiness - i.e. does an LLM-driven caller have what it needs to call the API correctly without guessing. Returns a 0..100 score, severity counts, and a structured list of violations with stable rule codes. Checks: documented title/servers/paths, per-operation summary/description/operationId/tags, documented 2xx + error responses, param descriptions/schemas/examples, response descriptions, JSON response schemas.

Build a runnable curl command for one operation in an OpenAPI 3.x or Swagger 2.x spec. Locate the operation by operationId (preferred) or by method + path, substitute path parameters using the spec's example values, include required query and header parameters with their example values, and attach a JSON body when the operation defines one. Returns the structured request (method, url, headers, body) alongside the assembled curl string with POSIX single-quote escaping.

Top L2s by Total Value Locked (TVL) from an open DeFi analytics API. Returns each L2 with TVL in USD, native token symbol, and market-data coin ids. Classification combines the source's parent-chain hint with a curated list of well-known L2s (Arbitrum, Optimism, Base, zkSync Era, Linea, Scroll, Mantle, Polygon zkEVM, Starknet, Blast, Mode, Manta, Metis, Polygon, Taiko, Immutable zkEVM, World Chain).

Onchain options protocols ranked by 24h notional volume with 7d and 30d volume, 1d and 7d change and the chains each runs on, plus sector totals. Use it when an agent is comparing decentralized options venues or tracking whether onchain options activity is growing.

Every builder-deployed perpetuals dex on Hyperliquid (HIP-3): dex name, full name, deployer, oracle updater and fee recipient, how many markets it lists (active vs delisted, so a wound-down dex reads as one), how many assets carry a streaming open-interest cap and the cap total, plus the current perp-deploy auction (start, end, start/current/end gas). The native dex is not a row; use perp-markets for it. Keyless public data.

Share your namespace with another wallet so different agents can coordinate through it. Grant read or readwrite access to a grantee wallet, optionally with a TTL. This is the cross-agent sharing a single agent cannot provide for itself.

The table + column schema for the onchain-sql tool - every queryable table (base.events, base.transactions, base.blocks, base.decoded_user_operations, base.transaction_attributions, solana.instructions, …) with its columns and types. Fetch once, then write SQL with confidence.

Convert subtitles between SRT, WebVTT, plain text, and JSON cues. Send SRT or VTT text (auto-detected) - or a JSON cues array [{start,end,text}] with times in ms - and the target format. Deterministic, pure CPU.

Current air quality index and pollutant concentrations for any location: US AQI, PM2.5, PM10, ozone, NO2, SO2, CO. Air quality API, no key, global.

Follow a short link's redirect chain (bit.ly, t.co, youtu.be, tracking links, …) without downloading any page body: returns the final URL, the final HTTP status, and every hop with its status code and Location target. Capped at 5 redirects; every hop is SSRF-re-validated, so chains that dive into private networks are blocked. Lets agents pre-flight links before fetching or citing them.

Fetch and parse a sitemap.xml (or sitemap index): returns up to 500 URLs with lastmod, or the child sitemaps of an index.

The live level-2 order book for one perpetual: best bid and ask, mid, spread in basis points, up to 20 levels a side with cumulative depth and bid/ask imbalance. Use it when an agent is sizing an order, checking liquidity before a trade or measuring book pressure at a point in time.

Return the most recent asset transfers (incoming + outgoing) for a wallet address - native coin, ERC-20, ERC-721, ERC-1155 - already merged and sorted newest first. Each row carries the block, tx hash, counterparty, asset, and decimal value. Cap is 100 per direction; widen the window via `fromBlock` if you need deeper history.

Compute the current TOTP code (RFC 6238, 30s period, SHA-1, 6 digits) from a base32 secret. Useful for agents that must complete 2FA flows they are authorized for.