# Services from nostr.halowerk.com on Zero

> nostr.halowerk.com serves 10 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/nostr.halowerk.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/nostr.halowerk.com/health.json

## Services

- [Nostr Zap Radar – Zap Receipt Aggregator](https://www.zero.xyz/c/nostr-zap-radar-zap-receipt-aggregator-a69ac9f3/llms.txt): $0.004/call via x402. Collects kind 9735 zap receipts for a given Nostr public key across up to 12 relays, deduplicates by event ID, decodes BOLT-11 invoices to extract actual amounts, and reports who zapped how much within a requested time window.
- [Nostr Event Signing & Preimage Generator](https://www.zero.xyz/c/nostr-event-signing-preimage-generator-54103974/llms.txt): $0.001/call via x402. Generates the NIP-01 serialisation, SHA-256 event ID, and 32-byte signing payload for a Nostr event so the caller can sign locally without exposing their private key.
- [Nostr Follower Graph Fetcher](https://www.zero.xyz/c/nostr-follower-graph-fetcher-2d53cdd9/llms.txt): $0.004/call via x402. Fetches and deduplicates kind 3 contact lists for a Nostr public key across up to 12 relays, returning the authoritative follow list based on the highest created_at timestamp.
- [nostr.halowerk.com LNURL Invoice Resolver](https://www.zero.xyz/c/nostr-halowerk-com-lnurl-invoice-resolver-87225e7b/llms.txt): $0.002/call via x402. Resolves a recipient (bech32 LNURL, Lightning address, or Nostr public key) to a Lightning invoice by fetching the appropriate LNURL callback and returning a payable invoice.
- [Nostr NIP-05 Identifier Verifier](https://www.zero.xyz/c/nostr-nip-05-identifier-verifier-51880be0/llms.txt): $0.001/call via x402. Verifies a NIP-05 identifier by fetching the domain's nostr.json and comparing the resolved public key, with explicit match/mismatch reporting and redirect detection
- [Nostr Relay Health Check](https://www.zero.xyz/c/nostr-relay-health-check-9ace6c3a/llms.txt): $0.003/call via x402. Measures Nostr relay health by sending a genuine WebSocket REQ query and recording connection time, time-to-end-of-stored-events, and event count returned.
- [Nostr Key/Identifier Converter](https://www.zero.xyz/c/nostr-key-identifier-converter-2e592913/llms.txt): $0.001/call via x402. Converts any NIP-19 bech32 identifier or 64-character hex value into all of its equivalent representations, including TLV-decoded relay hints, author, and kind fields.
- [Nostr Bot Score Analyzer](https://www.zero.xyz/c/nostr-bot-score-analyzer-89d2b878/llms.txt): $0.004/call via x402. Analyzes a Nostr public key's posting behavior across multiple relays and computes six bot-detection signals to produce a bot likelihood score.
- [nostr.halowerk.com RSS-to-Nostr Converter](https://www.zero.xyz/c/nostr-halowerk-com-rss-to-nostr-converter-460c561b/llms.txt): $0.002/call via x402. Fetches an RSS/Atom/RDF feed from a URL and converts each entry into a signed NIP-01 Nostr event (kind 1 short note or kind 30023 long-form article).
- [Nostr Zap Receipt Checker](https://www.zero.xyz/c/nostr-zap-receipt-checker-8edfefa1/llms.txt): $0.002/call via x402. Validates a Nostr kind 9735 zap receipt by running eight named cryptographic and structural checks, including BIP-340 signature verification and invoice amount comparison.

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)