# Services from buero.halowerk.com on Zero

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

## Services

- [Halowerk Entity Graph Extractor](https://www.zero.xyz/c/halowerk-entity-graph-extractor-5745b258/llms.txt): $0.004/call via x402. Extracts a structured knowledge graph of named entities (people, orgs, places, products, documents, events) and their stated relations from a document, with verified source quotes and character offsets.
- [Buero Halowerk Availability Resolver](https://www.zero.xyz/c/buero-halowerk-availability-resolver-9322f55e/llms.txt): $0.002/call via x402. Finds meeting windows that fit inside everyone's working hours by resolving busy blocks and IANA timezones for each participant.
- [Halowerk Büro Meeting Actions Extractor](https://www.zero.xyz/c/halowerk-b-ro-meeting-actions-extractor-fcf38507/llms.txt): $0.004/call via x402. Extracts action items, owners, deadlines, decisions, and open questions from a meeting transcript, with each entry verified against a verbatim passage in the source text.
- [Halowerk Terms Diff — Contract Version Comparison](https://www.zero.xyz/c/halowerk-terms-diff-contract-version-comparison-be75e5b3/llms.txt): $0.004/call via x402. Compares two versions of a contract or terms document and reports exactly what changed, using deterministic diff first and LLM-based substance analysis second.
- [Halowerk Buero Doc-Merge (Three-Way Document Merger)](https://www.zero.xyz/c/halowerk-buero-doc-merge-three-way-document-merger-87334f7d/llms.txt): $0.004/call via x402. Performs a three-way diff3 merge of documents — a common base and two derived versions — resolving conflicts by rule and returning a single merged document.
- [GDPR Article 30(1) Record of Processing Activities Generator](https://www.zero.xyz/c/gdpr-article-30-1-record-of-processing-activities-generator-5d075e23/llms.txt): $0.004/call via x402. Generates a draft Record of Processing Activities (RoPA) under GDPR Article 30(1) from structured inventory inputs including controller details, processing purposes, legal bases, data categories, recipients, transfers, retention periods, and security measures.
- [Halowerk Buero Clause Extractor](https://www.zero.xyz/c/halowerk-buero-clause-extractor-b07a97a4/llms.txt): $0.004/call via x402. Extracts specific contractual clauses (termination, liability, payment, etc.) from a contract supplied as text, URL, or base64-encoded file.
- [HALOWERK Persona Eval – Synthetic Persona Critique via Groq](https://www.zero.xyz/c/halowerk-persona-eval-synthetic-persona-critique-via-groq-64dba07a/llms.txt): $0.012/call via x402. Runs a structured synthetic-persona critique of product copy or concepts through Groq, simulating how a defined target persona might respond relative to a stated goal (e.g. purchase consideration).

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)