Crypto & Blockchain

Base gas oracle / Base gas price API / Base L2 gas fee tracker / real-time gas estimator / swap cost estimator. Returns the current Base fee, fast/standard/slow priority tiers, the USD cost of a typical swap, and a congestion recommendation. For AI agents, trading bots, and wallets timing transactions on Base to minimize gas.

Base wallet score API / wallet reputation / address risk scoring / onchain wallet intelligence / counterparty check. Returns a 0-100 activity score with letter grade, smart-wallet (ERC-4337) detection, ETH and USDC balances, recent USDC flow, and a user profile for any Base address. For AI agents, fraud screening, and KYC/counterparty checks.

Base wallet score API / wallet reputation / address risk scoring / onchain wallet intelligence / counterparty check. Returns a 0-100 activity score with letter grade, smart-wallet (ERC-4337) detection, ETH and USDC balances, recent USDC flow, and a user profile for any Base address. For AI agents, fraud screening, and KYC/counterparty checks.

Base yield API / best APY on Base / DeFi yield aggregator / stablecoin yield finder / lending APY / LP yield. Quality-filtered live yields across Base lending markets (Morpho, Moonwell — no impermanent-loss risk) and DEX LP pools, with a best-per-asset recommendation and per-pool risk scoring. For AI agents, yield optimizers, and treasury bots allocating capital on Base.

USD Coin

Every DefiLlama yield pool, filtered and sorted server-side so you don't fetch the 11MB index. Query: chain, project, symbol, min_tvl (USD), min_apy (%), stablecoin (true/false), sort (tvl|apy), limit (1-100). Each pool: project, chain, symbol, tvl_usd, apy, apy_base, apy_reward, stablecoin, il_risk, exposure. APYs move — poll it.

USD Coin

USD Coin

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Current crypto Fear & Greed Index with 1-day change (alternative.me).

Supplier and vendor risk score for any company domain. Returns a 0-100 stability score, risk tier, and named risk flags, with subsignals: domain age/expiry (WHOIS), TLS certificate status, DNS health (A/MX/SPF/DMARC), and 30-day news sentiment. Use for supplier due diligence and third-party domain screening before purchasing from, integrating with, or paying an unfamiliar vendor or counterparty. Call GET /supplier-risk?domain=acme.com. JSON response, no API key, $0.15 USDC per request via x402.

Company/org enrichment pack $0.04 — name, employees, country, industry, website (Wikidata+SEC). Aliases: /company-enrich /org-enrich. Keyless. format=apollo_org. Upsell verified company file $0.95.

Crypto ETF Sentinel — Curated directory of every active US spot crypto ETF issuer, including staking ETFs (100+ entries across 30+ cryptocurrencies). Each entry carries regulatory-stage classification (registration_filed / under_review / launch_imminent / trading / approved / withdrawn), ticker, exchange, owner organisation, and SEC CIK. Pair with paid per-issuer routes (``?cik=`` query param) to drill into comment letters, XBRL financials, or POS AM profiles.

Crypto ETF Sentinel — SEC filing tracker for US spot crypto ETFs across Bitcoin, Ethereum, Solana, XRP and 30+ assets. Freshest filings surface within ~10 minutes of detection — last 50 newest-first by default, built for continuous, high-volume monitoring. Covers S-1, 424B, 8-A12B, CERT, EFFECT. Optional filters: ``currency``, ``filing_type``, ``date_after``.

Paginated transfers where merchant is recipient

Foreign exchange reference rates from the European Central Bank. Base currency plus optional symbols filter. Updated daily on ECB schedule. JSON response. $0.002 USDC per call, pay via x402, no API key.

USD Coin

Get the current block height and latest-block details for an EVM chain

Live US mortgage and macro rates from the Federal Reserve. Returns 30-year and 15-year fixed mortgage rates, prime rate, fed funds rate, and CPI year-over-year. Sourced from FRED (Freddie Mac PMMS series).

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Crypto ETF Sentinel — Full SEC ↔ issuer comment-letter history for one US spot crypto ETF issuer. Returns UPLOAD/CORRESP pairs in chronological order with review-intensity classification. Comment-letter cadence is a leading indicator of how close an issuer is to approval. Pass the issuer's SEC CIK as the ``cik`` query param.

Crypto ETF Sentinel — Chronological profile evolution for one US spot crypto ETF issuer — custodian/fee/AP/in-kind deltas over time, derived from successive POS AM filings. Pass the issuer's SEC CIK as the ``cik`` query param.

Crypto ETF Sentinel — Full SEC ↔ issuer comment-letter history for one US spot crypto ETF issuer. Returns UPLOAD/CORRESP pairs in chronological order with review-intensity classification. Comment-letter cadence is a leading indicator of how close an issuer is to approval. Pass the issuer's SEC CIK as the ``cik`` query param.

Crypto ETF Sentinel — Single-call market snapshot for US spot crypto ETFs (Bitcoin, Ethereum, Solana, XRP and more). DB totals, filings broken down by cryptocurrency + form type, regulatory-stage counts (how many issuers are trading / launch_imminent / under_review / etc.), and an ``as_of`` ISO timestamp for stale-checking. Useful as a heartbeat for monitoring agents deciding whether to drill into the catalogue.