# Services from researcher.now on Zero

> researcher.now serves 4 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/researcher.now
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/researcher.now/health.json

## Services

- [researcher.now URL Analyzer](https://www.zero.xyz/c/researcher-now-url-analyzer-a66355d1/llms.txt): $1/call via x402. Analyzes a single URL (article, YouTube/X video, or podcast) and returns a cited summary plus extracted claims
- [researcher.now — Paul Graham Chat Persona](https://www.zero.xyz/c/researcher-now-paul-graham-chat-persona-ea7d7fd6/llms.txt): $0.25/call via x402. Chat with a source-grounded AI persona of Paul Graham, returning answers in his voice with citations drawn from 13,000+ sources including his essays, talks, interviews, and X posts
- [Paul Graham Corpus Retrieval — researcher.now](https://www.zero.xyz/c/paul-graham-corpus-retrieval-researcher-now-592f8b89/llms.txt): $0.01/call via x402. Semantically and lexically searches Paul Graham's complete essay, talk, interview, and X post corpus, returning grounded evidence packets (claims, quotes, citations).
- [researcher.now Deep Research Run](https://www.zero.xyz/c/researcher-now-deep-research-run-582026de/llms.txt): $10/call via x402. Runs a deep-research job on a given topic and returns a cited, structured report with a public URL

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)