# Services from groundcheck.seiche.info on Zero

> groundcheck.seiche.info 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/groundcheck.seiche.info
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/groundcheck.seiche.info/health.json

## Services

- [Groundcheck Instrument Identity Resolver](https://www.zero.xyz/c/groundcheck-instrument-identity-resolver-b06525c9/llms.txt): $0.005/call via x402. Maps a financial instrument identifier (ticker, ISIN, CUSIP, SEDOL, FIGI, or name) to canonical FIGI records with provenance attestation via Bloomberg open symbology
- [Groundcheck Claim Extractor](https://www.zero.xyz/c/groundcheck-claim-extractor-a7adbd87/llms.txt): $0.005/call via x402. Splits input text into atomic, independently checkable factual claims using rule-based decomposition, returning a signed receipt bound to the input hash.
- [Groundcheck Signed Delivery Attestation](https://www.zero.xyz/c/groundcheck-signed-delivery-attestation-6da77d62/llms.txt): $0.05/call via x402. Issues an offline-verifiable Ed25519 attestation that binds an x402 payment receipt to the delivered payload, verifying schema conformance and claim verdicts for agentic commerce accountability.
- [Groundcheck Claim Grounding & Citation Attestation](https://www.zero.xyz/c/groundcheck-claim-grounding-citation-attestation-0d6534ed/llms.txt): $0.02/call via x402. Verifies factual claims in a text document against live web sources, returning machine-verified verdicts (supported/refuted/unverified), confidence scores, and cited sources for each claim.

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)