# Services from api.trialbase-db.org on Zero

> api.trialbase-db.org serves 2 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/api.trialbase-db.org
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/api.trialbase-db.org/health.json

## Services

- [TrialBase DB Coverage](https://www.zero.xyz/c/trialbase-db-coverage-88874ada/llms.txt): $0.25/call via MPP. Retrieves the dated TrialBase coverage contract detailing release size, registry counts, identity matching statistics, and field fill rates across clinical trial registries.
- [TrialBase DB Clinical Trials Search API](https://www.zero.xyz/c/trialbase-db-clinical-trials-search-api-e1886820/llms.txt): $0.1/call via x402. Search a normalized database of clinical trials by registry, condition, intervention, sponsor, country, status, phase, study type, or free text.

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)