# Services from api.vrsai.tech on Zero

> api.vrsai.tech serves 11 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.vrsai.tech
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/api.vrsai.tech/health.json

## Services

- [vrsai SQL Preflight Check](https://www.zero.xyz/c/vrsai-sql-preflight-check-b24456d3/llms.txt): $0.05/call via x402. Analyzes PostgreSQL SQL statements before execution to detect and block destructive or unsafe database operations by AI agents
- [VRSAI Payout Preflight Check](https://www.zero.xyz/c/vrsai-payout-preflight-check-458ac66f/llms.txt): $0.05/call via x402. Validates an outbound payment immediately before authorization by checking destination integrity, duplicate detection, amount/currency drift, and structural validity of payment details.
- [vrsai Invoice Match](https://www.zero.xyz/c/vrsai-invoice-match-d6204aba/llms.txt): $0.05/call via x402. Validates a supplier invoice against purchase orders, cumulative receipts, prior invoicing history, and tolerance policy to determine payment approval readiness.
- [vrsai Package Install Preflight](https://www.zero.xyz/c/vrsai-package-install-preflight-af33e5e0/llms.txt): $0.01/call via x402. Checks an exact npm or PyPI package version against registry, vulnerability, malicious-package, withdrawal, and provenance signals immediately before installation, returning ALLOW, REVIEW, BLOCK, or UNKNOWN with machine-readable reason codes.
- [vrsai OpenAPI Agent Readiness Assessor](https://www.zero.xyz/c/vrsai-openapi-agent-readiness-assessor-5b7311bf/llms.txt): $0.03/call via x402. Scores and audits an OpenAPI description across six dimensions to determine how well-suited it is for autonomous AI agent consumption.
- [vrsai Decision Optimization](https://www.zero.xyz/c/vrsai-decision-optimization-bb23734c/llms.txt): $0.03/call via x402. Solves allocation, assignment, selection, and resource-mix problems to find the lowest-cost or highest-value feasible solution given caller-supplied options, capacities, budgets, and eligibility rules.
- [vrsai Payout Preflight Check](https://www.zero.xyz/c/vrsai-payout-preflight-check-0ae25b79/llms.txt): $0.05/call via x402. Validates an outbound payout immediately before authorization to detect changed destinations, duplicate payments, amount/currency drift, and malformed payment details.
- [vrsai Invoice Match](https://www.zero.xyz/c/vrsai-invoice-match-bac15bb8/llms.txt): $0.05/call via x402. Validates a supplier invoice against purchase orders, cumulative receipts, prior invoicing history, and tolerance policy before approving payment.
- [vrsai SQL Preflight Check](https://www.zero.xyz/c/vrsai-sql-preflight-check-f1b3876a/llms.txt): $0.05/call via x402. Validates PostgreSQL SQL statements immediately before execution to detect and block destructive or unsafe database operations by AI agents and automated systems.
- [vrsai OpenAPI Agent Readiness Assessor](https://www.zero.xyz/c/vrsai-openapi-agent-readiness-assessor-e3ccaaa5/llms.txt): $0.03/call via x402. Analyzes an OpenAPI description to score and report how well-suited it is for consumption by autonomous AI agents.
- [vrsai Decision Optimization](https://www.zero.xyz/c/vrsai-decision-optimization-c0b672a8/llms.txt): $0.03/call via x402. Selects the lowest-cost or highest-value feasible allocation, assignment, or resource mix from caller-supplied options, capacities, budgets, and eligibility rules, returning verified feasibility evidence and solver optimality/gap information.

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)