# Services from lab.paidapis.net on Zero > lab.paidapis.net serves 23 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero. Canonical page: https://www.zero.xyz/host/lab.paidapis.net Live health (JSON, refreshed every minute): https://www.zero.xyz/host/lab.paidapis.net/health.json ## Services - [Reliable ETH Price Oracle with Fallback](https://www.zero.xyz/c/reliable-eth-price-oracle-with-fallback-d1dc0e83/llms.txt): $0.01/call via x402. Returns the current ETH/USD price with automatic cache-fallback on upstream failures, demonstrating a resilient oracle pattern on Base mainnet via x402 micropayments. - [Wikipedia Article Summary Fetcher](https://www.zero.xyz/c/wikipedia-article-summary-fetcher-aea953c7/llms.txt): $0.01/call via x402. Fetches a structured summary (title, source URL, and paragraphs) of any Wikipedia article by title - [x402-experiments Address Enrichment (lab.paidapis.net)](https://www.zero.xyz/c/x402-experiments-address-enrichment-lab-paidapis-net-eb6df16a/llms.txt): $0.01/call via x402. Enriches a blockchain address with classification, native ETH balance, and transaction count to distinguish contracts from wallets - [x402 Transaction Verifier (lab.paidapis.net)](https://www.zero.xyz/c/x402-transaction-verifier-lab-paidapis-net-f83fce47/llms.txt): $0.02/call via x402. Checks whether a given blockchain transaction hash is confirmed on Base mainnet and returns a signed attestation of its status. - [x402-experiments Gas Price Alert Subscription](https://www.zero.xyz/c/x402-experiments-gas-price-alert-subscription-b1ab15f5/llms.txt): $0.02/call via x402. Registers a webhook-based gas price alert that fires when Ethereum gas prices cross a specified Gwei threshold - [x402 Freshness-Priced Data (lab.paidapis.net)](https://www.zero.xyz/c/x402-freshness-priced-data-lab-paidapis-net-2094c8e6/llms.txt): $0.002/call via x402. Returns ETH/USD price and Base gas price, with a choice between cached (cheaper) or live (fresh) data fetch. - [Gas Metrics Oracle — x402 Experiments (lab.paidapis.net)](https://www.zero.xyz/c/gas-metrics-oracle-x402-experiments-lab-paidapis-net-bb81aba4/llms.txt): $0.01/call via x402. Returns real-time and statistical gas price metrics (current, average, min, max, stdDev, trend) for a configurable recent time window on Base mainnet. - [x402-experiments Market Snapshot (lab.paidapis.net)](https://www.zero.xyz/c/x402-experiments-market-snapshot-lab-paidapis-net-2b7f51f0/llms.txt): $0.01/call via x402. Returns a real-time Base mainnet market snapshot including ETH/USD price, gas price in Gwei, and the latest Base block number and timestamp. - [Insured ETH/USD Price Feed Subscription](https://www.zero.xyz/c/insured-eth-usd-price-feed-subscription-4792269c/llms.txt): $0.01/call via x402. Creates a price-insurance subscription that snapshots the ETH/USD oracle price and pays out from an escrow to a subscriber wallet if the price deviates beyond a set tolerance at a future checkpoint. - [x402-experiments Image Resize (lab.paidapis.net)](https://www.zero.xyz/c/x402-experiments-image-resize-lab-paidapis-net-32ecafc8/llms.txt): $0.005/call via x402. Resizes a remote image to specified pixel dimensions and returns the resized image as a data URL with metadata. - [Multi-Source Transaction Verifier (lab.paidapis.net)](https://www.zero.xyz/c/multi-source-transaction-verifier-lab-paidapis-net-68140148/llms.txt): $0.05/call via x402. Verifies a blockchain transaction hash against multiple independent sources and returns a consensus confirmation status with a cryptographic signature. - [lab.paidapis.net Invoice Create](https://www.zero.xyz/c/lab-paidapis-net-invoice-create-15ae6b25/llms.txt): $0.001/call via x402. Issues a signed, deferred-payment invoice to a specified wallet address for a given USDC amount, to be settled later at a dynamic /pay sub-resource. - [Large USDC Transfer Scanner (lab.paidapis.net)](https://www.zero.xyz/c/large-usdc-transfer-scanner-lab-paidapis-net-4ef635a3/llms.txt): $0.02/call via x402. Returns a filtered list of large USDC transfer events on Base mainnet above a specified USD threshold, including sender, receiver, amount, and transaction details. - [Subscription Renewal Reminder Registration](https://www.zero.xyz/c/subscription-renewal-reminder-registration-fc0478f8/llms.txt): $0.01/call via x402. Registers a subscription for renewal-reminder tracking and fires a webhook when the reminder window opens before the next renewal date. - [Gas History Export (lab.paidapis.net)](https://www.zero.xyz/c/gas-history-export-lab-paidapis-net-a31a35d4/llms.txt): $0.005/call via x402. Returns historical Base mainnet gas price samples (in Gwei) for a specified time range, exportable as JSON or CSV. - [Blockchain Address Reputation Scorer (lab.paidapis.net)](https://www.zero.xyz/c/blockchain-address-reputation-scorer-lab-paidapis-net-87314caf/llms.txt): $0.01/call via x402. Scores a blockchain address's trustworthiness by computing on-chain signals and returning a structured reputation breakdown with a numeric trust score. - [x402-experiments Attestation Log (lab.paidapis.net)](https://www.zero.xyz/c/x402-experiments-attestation-log-lab-paidapis-net-fc75a96c/llms.txt): $0.02/call via x402. Returns a paginated, cryptographically signed log of on-chain payment attestations recorded by the x402 experiment suite on Base mainnet. - [Batch Image Resize API (lab.paidapis.net)](https://www.zero.xyz/c/batch-image-resize-api-lab-paidapis-net-b18f6983/llms.txt): $0.005/call via x402. Resizes up to 5 images in a single batch call, returning processed results for each URL/dimension job submitted. - [Gas Comparator – Base vs Ethereum Gas Price Oracle](https://www.zero.xyz/c/gas-comparator-base-vs-ethereum-gas-price-oracle-77b287dc/llms.txt): $0.01/call via x402. Fetches and compares current gas prices on Base and Ethereum mainnet, returning the ratio, delta in Gwei, and ETH/USD price at check time. - [x402-experiments Escrow Create (lab.paidapis.net)](https://www.zero.xyz/c/x402-experiments-escrow-create-lab-paidapis-net-f1fa2dff/llms.txt): $0.02/call via x402. Creates a blockchain-conditional escrow record on Base mainnet that releases a resource only after a specified transaction hash confirms on-chain. - [x402-experiments Bundle Subscribe (lab.paidapis.net)](https://www.zero.xyz/c/x402-experiments-bundle-subscribe-lab-paidapis-net-5660c89d/llms.txt): $0.03/call via x402. Grants a wallet address time-limited subscription access to the full x402-experiments endpoint bundle on Base mainnet USDC via the x402 payment protocol. - [Normalized Gas Price Oracle (lab.paidapis.net)](https://www.zero.xyz/c/normalized-gas-price-oracle-lab-paidapis-net-a161539e/llms.txt): $0.01/call via x402. Returns normalized, cross-chain gas price snapshots in Gwei, including block number and timestamp, for use in gas estimation and fee planning. - [x402-experiments Leaderboard List (lab.paidapis.net)](https://www.zero.xyz/c/x402-experiments-leaderboard-list-lab-paidapis-net-9f9f425e/llms.txt): $0.005/call via x402. Adds a named entry (with optional URL and note) to a public leaderboard, returning a status confirmation. Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently. - [Zero catalog index](https://www.zero.xyz/llms.txt)