# Services from x402-trialscope.onrender.com on Zero

> x402-trialscope.onrender.com 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/x402-trialscope.onrender.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/x402-trialscope.onrender.com/health.json

## Services

- [TrialScope Clinical Trial Search](https://www.zero.xyz/c/trialscope-clinical-trial-search-8f51309c/llms.txt): $0.01/call via x402. Search ClinicalTrials.gov for clinical trials by keyword, phase, status, sponsor, or location and return matching study records
- [TrialScope — Clinical Trial Snapshot](https://www.zero.xyz/c/trialscope-clinical-trial-snapshot-e5b729e0/llms.txt): $0.01/call via x402. Fetches current study dossiers and change-deltas for up to 25 ClinicalTrials.gov trials by NCT ID in a single paid call
- [TrialScope — Clinical Trial Change-Delta Lookup](https://www.zero.xyz/c/trialscope-clinical-trial-change-delta-lookup-182206b1/llms.txt): $0.02/call via x402. Retrieves the field-level changes between a stored snapshot and the current ClinicalTrials.gov record for a specific trial, revealing what has changed since the snapshot was taken.
- [TrialScope — Clinical Trial Study Dossier Lookup](https://www.zero.xyz/c/trialscope-clinical-trial-study-dossier-lookup-c563ec9f/llms.txt): $0.01/call via x402. Fetches a full study dossier for a specific clinical trial by NCT ID from ClinicalTrials.gov, paid per call via x402/USDC

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)