# Services from agentx.sale on Zero

> agentx.sale serves 12 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/agentx.sale
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/agentx.sale/health.json

## Services

- [x402 Doctor — URL Payability Checker](https://www.zero.xyz/c/x402-doctor-url-payability-checker-df761ba0/llms.txt): $0.02/call via x402. Validates whether a URL is a properly implemented x402 agent-payable resource, grading it against v1 and v2 of the x402 spec and returning a verdict with grade
- [agentx.sale Site Agent-Readiness Verdict Card](https://www.zero.xyz/c/agentx-sale-site-agent-readiness-verdict-card-85d2bb3a/llms.txt): $0.02/call via x402. Grades a domain's agent-facing infrastructure (llms.txt, A2A, MCP card, OpenAPI), TLS, security headers, and AI-crawler policy into a single readiness verdict card
- [agentx.sale WebMCP Upgrade Generator](https://www.zero.xyz/c/agentx-sale-webmcp-upgrade-generator-13671bbc/llms.txt): $4/call via x402. Fetches a website, analyses its monetization journey, and generates a complete, syntax-validated webmcp.js tool file with schemas, hints, and publish instructions.
- [agentx.sale Text Classifier](https://www.zero.xyz/c/agentx-sale-text-classifier-d5c3b9d1/llms.txt): $1.75/call via x402. Classifies supplied text into free-form or caller-defined topic labels with confidence scores and rationale, supporting single-label and multi-label modes
- [AI Crawler Policy Checker](https://www.zero.xyz/c/ai-crawler-policy-checker-651c29df/llms.txt): $0.02/call via x402. Returns which AI web crawlers (GPTBot, ClaudeBot, Google-Extended, PerplexityBot, etc.) a given domain blocks, along with TLS and security header status.
- [agentx.sale A2A/MCP Protocol Card Linter](https://www.zero.xyz/c/agentx-sale-a2a-mcp-protocol-card-linter-d72ada20/llms.txt): $0.02/call via x402. Validates an agent.json or server-card.json URL against the A2A/MCP protocol spec and returns drop-in patched JSON fixes
- [agentx.sale GTM Roast – Landing Page Critique with SVG Card](https://www.zero.xyz/c/agentx-sale-gtm-roast-landing-page-critique-with-svg-card-8ea83afa/llms.txt): $0.02/call via x402. Fetches a landing page URL, classifies its money journey, and returns five AI persona critiques (offer, focus, durability) plus a shareable line-art SVG card.
- [agentx.sale DNS/TLS/HTTP Site Health Snapshot](https://www.zero.xyz/c/agentx-sale-dns-tls-http-site-health-snapshot-1bad9175/llms.txt): $0.01/call via x402. Returns a combined DNS, TLS, and HTTP health snapshot for a given domain, including connectivity and certificate status
- [agentx.sale AI Keyword Extraction](https://www.zero.xyz/c/agentx-sale-ai-keyword-extraction-b4e02062/llms.txt): $0.9/call via x402. Extracts top salient keywords and key phrases with relevance scores from supplied text, and detects the language.
- [agentx.sale SEO + Agent-Readiness Audit](https://www.zero.xyz/c/agentx-sale-seo-agent-readiness-audit-e3f82649/llms.txt): $0.1/call via x402. Runs a rules-based SEO and agent-readiness audit on a given domain, returning structured findings about the site's search optimization and AI-agent discoverability posture
- [agentx.sale Live Weather by City](https://www.zero.xyz/c/agentx-sale-live-weather-by-city-d69db8e4/llms.txt): $0.01/call via x402. Returns live current weather conditions for any city using Open-Meteo data
- [agentx.sale WebMCP Agent-Compatibility Checker](https://www.zero.xyz/c/agentx-sale-webmcp-agent-compatibility-checker-214b0034/llms.txt): $0.1/call via x402. Checks whether a website exposes a WebMCP tool surface that AI agents can call, returning an inventory of tools, schema-hygiene findings, and a readiness verdict

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)