ClinVar variants for a gene filtered by clinical significance - counts and latest records

Live recommended Bitcoin transaction fee rates (in sat/vB) for next-block, ~30-minute, ~1-hour, economy and minimum confirmation targets, straight from the mempool. Also estimates the total fee (in sats and BTC) for a transaction of the given virtual size, so an agent can pick a fee tier and know the cost before broadcasting.

Paid webhook/API execution for autonomous agents. Executes one public HTTPS action after x402 payment, applies retries and idempotency, then returns a signed receipt with request hash, response hash, target, status, and attempt count.

Tournament fixtures, filterable by team, opponent, and date range.

Search the Protein Data Bank for 3D structures by free text - title, method, resolution and release date

Live gas conditions for an EVM chain: current gas price, the latest block's base fee (EIP-1559) and the suggested max priority fee — all in both wei and gwei. Ground truth an agent can't compute. Reads live on-chain data with automatic endpoint fallback.

Tournament fixtures, filterable by team, opponent, and date range.

Asteroid and comet lookup (NASA/JPL SBDB) - hazard flags, size, orbit and next close approaches

Tournament fixtures, filterable by team, opponent, and date range.

x402 ping health check - a paid round trip that returns server time and a request id

Newly discovered exoplanets (NASA Exoplanet Archive), newest first, with method, size, mass and orbit

Decode a UUID - version, variant, and the embedded timestamp and node for v1, v6 and v7, plus nil and max detection and URN, braced and bare formats

Geologic unit at any latitude and longitude - rock type, formation, age and source survey map

Aggregate stats for a wallet (tx count, total amount, unique recipients)

Postal code lookup worldwide - place name, state or region and coordinates for a ZIP code in any country

Live snapshot of the Bitcoin mempool: number of unconfirmed transactions, total pending virtual size (bytes and MB), the current backlog in blocks, total fees pending (sats and BTC), the fee-rate histogram, and the current chain tip height. Lets an agent gauge network congestion and time a transaction.

Refugee statistics by country (UNHCR) - refugees, asylum seekers, displaced and stateless people, with top host and origin countries

WhiteMagic continuity-receipt verification: POST a signed receipt bundle and receive a verdict (TRUSTED / PROVISIONAL / INSUFFICIENT_EVIDENCE / UNTRUSTED) with coded errors and an optional signed verification receipt. Verification is stateless, offline-verifiable, and fail-closed; keyless /health, /info, /revocations and GET /anchors remain free.

Search Reactome biological pathways by topic - id, name, species and summary

Protein search across UniProtKB by name, function or gene - accession, organism, length and review status