# Services from 83-29-153-50.sslip.io on Zero > 83-29-153-50.sslip.io serves 20 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/83-29-153-50.sslip.io Live health (JSON, refreshed every minute): https://www.zero.xyz/host/83-29-153-50.sslip.io/health.json ## Services - [QuietSignal Contract Controls Inspector](https://www.zero.xyz/c/quietsignal-contract-controls-inspector-825f7226/llms.txt): $0.01/call via x402. Fetches machine-readable control and upgradeability facts for a given Base smart contract address, including proxy implementation, owner, and pause state. - [QuietSignal x402 Readiness Checker](https://www.zero.xyz/c/quietsignal-x402-readiness-checker-ec9f6d77/llms.txt): $0.1/call via x402. Inspects a public URL to verify whether it correctly implements the x402 HTTP payment protocol and is ready for machine discovery - [QuietSignal Approval Scan — EVM Wallet Token Approval Facts](https://www.zero.xyz/c/quietsignal-approval-scan-evm-wallet-token-approval-facts-10431711/llms.txt): $0.01/call via x402. Returns on-chain token approval facts for a given EVM address, including approval count and unlimited-like approval detection, over a specified block range. - [QuietSignal URL Evidence](https://www.zero.xyz/c/quietsignal-url-evidence-df0e6fd1/llms.txt): $0.01/call via x402. Fetches and returns machine-readable HTTP evidence (status code, final URL, redirect chain, HTTPS status) for any given public URL - [QuietSignal Public Page Safety Scanner](https://www.zero.xyz/c/quietsignal-public-page-safety-scanner-8c8e6fcb/llms.txt): $0.01/call via x402. Screens a public HTTP/HTTPS URL for deterministic prompt-injection indicators and returns a risk level assessment. - [QuietSignal Wallet Preflight](https://www.zero.xyz/c/quietsignal-wallet-preflight-2142adef/llms.txt): $0.01/call via x402. Returns read-only preflight facts about an EVM wallet address on Base, including native and stablecoin balance presence. - [QuietSignal L2BEAT Snapshot](https://www.zero.xyz/c/quietsignal-l2beat-snapshot-4d870fef/llms.txt): $0.02/call via x402. Returns a machine-readable ranked snapshot of Layer 2 blockchain projects from L2BEAT, optionally filtered by category and count. - [QuietSignal JSON-to-CSV Converter](https://www.zero.xyz/c/quietsignal-json-to-csv-converter-2854485c/llms.txt): $0.05/call via x402. Fetches a public JSON array from a given URL and converts it to normalized CSV format, deduplicating rows and returning column schema metadata. - [QuietSignal L2BEAT Changes Feed](https://www.zero.xyz/c/quietsignal-l2beat-changes-feed-87b1bb8b/llms.txt): $0.03/call via x402. Returns machine-readable rollup of recent material changes detected from L2BEAT public data, filterable by L2 category - [QuietSignal DNS Inventory — Public DNS Record Lookup](https://www.zero.xyz/c/quietsignal-dns-inventory-public-dns-record-lookup-19d5edd8/llms.txt): $0.03/call via x402. Queries a public hostname via Google DNS-over-HTTPS and returns structured DNS record data (e.g. A records) for that domain. - [QuietSignal Token Facts](https://www.zero.xyz/c/quietsignal-token-facts-0850533b/llms.txt): $0.01/call via x402. Fetches read-only ERC-20 token metadata and contract facts for a given Base network contract address. - [QuietSignal HTTP Policy Inspector](https://www.zero.xyz/c/quietsignal-http-policy-inspector-12d26990/llms.txt): $0.02/call via x402. Inspects a public HTTP(S) URL and returns observed policy signals such as HTTPS usage and HSTS headers. - [QuietSignal Opportunity Scan](https://www.zero.xyz/c/quietsignal-opportunity-scan-ba28eee2/llms.txt): $0.02/call via x402. Returns a read-only rollup of on-chain DeFi opportunity signals including open task-market bounties and Morpho Base near-liquidation positions. - [QuietSignal L2Beat Discovery Feed](https://www.zero.xyz/c/quietsignal-l2beat-discovery-feed-e681c560/llms.txt): $0.01/call via x402. Returns recent L2Beat smart-contract discovery update records, filterable by project name and severity, for Layer 2 blockchain monitoring. - [QuietSignal npm Package Health Lookup](https://www.zero.xyz/c/quietsignal-npm-package-health-lookup-f235f9bf/llms.txt): $0.02/call via x402. Returns public npm registry health facts for a given package, including version count, latest version, and registry status. - [QuietSignal Catalog Health Check](https://www.zero.xyz/c/quietsignal-catalog-health-check-5b00ff29/llms.txt): $0.01/call via x402. Returns HTTP liveness status and counts (alive, dead, timeout, 4xx, 5xx) for public PayanAgent offer endpoints from the QuietSignal catalog. - [QuietSignal Directory Gaps](https://www.zero.xyz/c/quietsignal-directory-gaps-a7c14bc0/llms.txt): $0.02/call via x402. Returns a rollup of directory health-gap facts — categories and endpoints that are underserved or unhealthy in the x402/HTTP 402 API directory. - [QuietSignal Opportunity Shortlist](https://www.zero.xyz/c/quietsignal-opportunity-shortlist-e8dc40fc/llms.txt): $0.02/call via x402. Returns a ranked shortlist of public AI agent task and bounty opportunities from aggregated marketplace feeds, paginated by limit. - [QuietSignal Public Data — Hire/Developer Data Extract](https://www.zero.xyz/c/quietsignal-public-data-hire-developer-data-extract-7c037182/llms.txt): $0.01/call via x402. Fetches read-only rollup facts about wallets, hiring opportunities, and developer data via a pay-per-request HTTP 402 endpoint on Base using USDC. - [QuietSignal Catalog Health Toolkit](https://www.zero.xyz/c/quietsignal-catalog-health-toolkit-c09f3267/llms.txt): $0.05/call via x402. Returns a machine-readable catalog health check summary including schema, product metadata, and methodology facts for AI agents 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)