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Z39.50 and SRU
Standard search protocols used by library catalogs.
| Category | Library Catalogs & Archives |
|---|---|
| Authentication | No auth |
| Pricing | Free |
| Website | https://www.loc.gov/standards/sru/ |
| Docs | https://www.loc.gov/standards/sru/ |
| Last checked | 2026-10-14 |
| As JSON | /api/v1/directory/z3950-and-sru.json |
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