# Quantum Information and Quantum Computation Open Problem Zoo (QIQCOP Zoo)

> A curated, citable catalog of open problems in quantum information and quantum computation.

The zoo holds 105 permanent records (95 unsolved, 10 solved), covering 104 distinct mathematical questions (95 unsolved, 9 solved). Explicitly equivalent formulations count once in the question totals. Search results and downloads count records. Each record has a self-contained statement with TeX mathematics, a source attribution, scoped progress items, a comment on the remaining gap, full references with alpha-style labels, one or two fields (broad research areas), and one to five topics (specific objects and techniques).

## MCP access

Connect a remote MCP client to https://api.qiqc-op.com/mcp using Streamable HTTP. Public catalog reads require no API key or local installation. Use get_taxonomy for area/topic labels and slugs; search_problems accepts either, case-insensitively. Search returns total matches and nextOffset; count is only the current page (50 by default). Continue with the same filters and offset=nextOffset until nextOffset is null. get_status separates permanent record counts from distinct-question counts. Use get_problem, list_references, search_sources, and build_context for details; build_context respects a token budget. Setup guide: https://qiqc-op.com/about/#mcp.

## Machine-readable downloads

- https://qiqc-op.com/api/index.json: every problem with title, status, fields, topics, plain-text statement, and links.
- https://qiqc-op.com/api/problems/<id>.json: one full record (TeX source, HTML, plain text, references, equation labels).
- https://qiqc-op.com/api/identifiers.json: permanent op IDs, ULIDs, and aliases; every alias resolves through the problem API.
- https://qiqc-op.com/api/main/problems/<ulid>.json: main-compatible Problem metadata with our binary status and complete authored record.
- https://qiqc-op.com/api/tags.json: the taxonomy of fields and topics with counts.
- https://qiqc-op.com/api/v1/problems.jsonl.gz: compressed full static catalog snapshot. The legacy .jsonl URL remains a download; use .json for application/json.
- https://api.qiqc-op.com/api/v1/problems.jsonl: current service problem views as application/x-ndjson, with HTTP gzip when accepted.
- https://qiqc-op.com/problem/<id>/<id>.tex: the TeX form of one record.

## Contributing

Records are JSON files in https://github.com/Naixu-Guo/quantum-open-problems/tree/main/database/problems_json, with a TeX form of each in database/problems_tex. Follow database/_template.json and open a pull request; the build validates every record. Direct online sending is not enabled. Prepare and copy a proposal at https://qiqc-op.com/contribute/, then submit a GitHub issue (a GitHub account is required). Proposals are reviewed by the maintainers before publication.