We built Prowl because we kept hitting the same problem: our agents had no reliable way to find and evaluate APIs programmatically. Humans have Google. Agents had nothing. Prowl is ASO Agent Search Optimization. The same way SEO helps humans find websites, ASO helps AI agents discover, compare, and trust APIs. How it works: - Crawlers auto-discover APIs across the web - Vendors claim their service for free (DNS verification, like Google Search Console) - An LLM orchestrator benchmarks every API across 8 dimensions — latency, error clarity, doc quality, auth simplicity, and more - Agents query our registry via REST or MCP to find the right tool for the job - The full LLM thinking process is transparent you can see exactly how every score was computed The business model is dead simple: Free to list. Free to claim. First benchmark free. $1 per re-benchmark via x402 micropayments. No subscriptions. No enterprise sales calls. We have 30+ APIs indexed, a Python SDK (pip install prowl-client), an MCP server (npx mcp-prowl), and framework examples for Claude, OpenAI, LangChain, and LlamaIndex. The bet: every API will need an agent-readiness score the same way every website needs an SEO score. We're building that standard. Would love your feedback especially from anyone building agents that need to discover tools at runtime.

Prowl — The Agent Discovery Network

SEO is for humans. ASO is for agents.

SEO is for humans. ASO is for agents.