# Services from contextiq.trango-compute.com on Zero

> contextiq.trango-compute.com serves 8 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/contextiq.trango-compute.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/contextiq.trango-compute.com/health.json

## Services

- [ContextIQ Agent Protocol Inspector](https://www.zero.xyz/c/contextiq-agent-protocol-inspector-064f7eb6/llms.txt): $0.02/call via x402. Scans a target URL or domain for agentic protocol support (MCP, A2A, ARD) and llms.txt presence, returning detection results with evidence per protocol.
- [ContextIQ x402 Inspector — Payment Challenge Validator](https://www.zero.xyz/c/contextiq-x402-inspector-payment-challenge-validator-81946d14/llms.txt): $0.02/call via x402. Validates whether an HTTP 402 payment challenge (x402 protocol) is correctly formed, returning a structured scan result with status, warnings, and evidence.
- [Agent Commerce Gate — Pre-Payment Counterparty Risk Check](https://www.zero.xyz/c/agent-commerce-gate-pre-payment-counterparty-risk-check-653c7916/llms.txt): $0.02/call via x402. Runs a combined identity, reputation, and payment-challenge check on a counterparty before allowing a payment to proceed, returning a scored allow/warn/block decision.
- [DNS Inspector — Full Record Lookup (A/AAAA/MX/NS/TXT/SOA/CAA + SPF/DMARC)](https://www.zero.xyz/c/dns-inspector-full-record-lookup-a-aaaa-mx-ns-txt-soa-caa-spf-dmarc-dba94a10/llms.txt): $0.02/call via x402. Performs a comprehensive DNS record lookup for a domain, returning A, AAAA, MX, NS, TXT, SOA, and CAA records plus parsed SPF/DMARC analysis, detected providers, and a CAA verdict.
- [Agent Commerce Gate — Decision Lookup by Check ID](https://www.zero.xyz/c/agent-commerce-gate-decision-lookup-by-check-id-1de7416d/llms.txt): $0.02/call via x402. Retrieves a previously computed policy decision by its checkId without re-executing the underlying risk check
- [ERC-8004 Inspector Agent Identity & Reputation Lookup](https://www.zero.xyz/c/erc-8004-inspector-agent-identity-reputation-lookup-1267e133/llms.txt): $0.02/call via x402. Looks up the on-chain identity and reputation of an ERC-8004 registered agent by agentId and network, returning owner info, wallet, token URI, metadata, x402 endpoint, and client reputation summary
- [Agent Commerce Gate — Settlement Receipt Binding](https://www.zero.xyz/c/agent-commerce-gate-settlement-receipt-binding-e7d99eeb/llms.txt): $0.02/call via x402. Binds a blockchain settlement receipt to a prior payment-authorization decision, confirming whether the on-chain transfer matches the expected payment terms
- [ContextIQ Token Inspector – Model Pricing](https://www.zero.xyz/c/contextiq-token-inspector-model-pricing-aadf6f71/llms.txt): $0.02/call via x402. Returns per-million-token input/output pricing for a catalog of AI models, including model ID, provider, tokenizer family, and context window size

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)