# NED Table Access Protocol (Caltech/IPAC)

**Canonical:** https://apis.io/apis/caltech/ned-tap/  
**Provider:** California Institute of Technology — https://apis.io/providers/caltech/  
**Base URL:** https://ned.ipac.caltech.edu/tap  
**Documentation:** https://ned.ipac.caltech.edu/Documents/Guides/Interface/TAP

NED Table Access Protocol (Caltech/IPAC) is one of 11 APIs that [California Institute of Technology](https://apis.io/providers/caltech/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Astronomy, Virtual Observatory, TAP, ADQL, and NASA. The published artifact set on APIs.io includes API documentation.

The NASA/IPAC Extragalactic Database, operated by Caltech/IPAC, exposes an IVOA TAP service over its extragalactic object catalog. Verified live 2026-08-19 returning TAP_SCHEMA rows as CSV, and returning a spec-conformant VOTable error document — carrying QUERY_STATUS, ERROR_TYPE, PROVIDER and a correlatable REQ_ID — when the REQUEST parameter is omitted. The strongest error semantics in Caltech's estate.

## Machine-readable artifacts (2)

- **Documentation** — https://ned.ipac.caltech.edu/Documents/Guides/Interface/TAP
- **Capabilities** — https://ned.ipac.caltech.edu/tap/capabilities

## Other California Institute of Technology APIs (10)

- [CaltechDATA REST API](https://apis.io/apis/caltech/caltechdata-rest/)
- [CaltechDATA OAI-PMH](https://apis.io/apis/caltech/caltechdata-oai/)
- [CaltechAUTHORS REST API and OAI-PMH](https://apis.io/apis/caltech/caltechauthors/)
- [Caltech Library Feeds](https://apis.io/apis/caltech/library-feeds/)
- [SCEDC FDSN Web Services](https://apis.io/apis/caltech/scedc-fdsn/)
- [IRSA Virtual Observatory APIs (Caltech/IPAC)](https://apis.io/apis/caltech/irsa-vo/)
- [NASA Exoplanet Archive TAP (Caltech/IPAC)](https://apis.io/apis/caltech/exoplanet-archive-tap/)
- [Caltech Shibboleth Identity Provider (InCommon)](https://apis.io/apis/caltech/identity-federation/)
- [Caltech Library Guides (Springshare tenancy)](https://apis.io/apis/caltech/libguides-springshare/)
- [EBSCO Link Resolver (Caltech instance)](https://apis.io/apis/caltech/ebsco-resolver/)

## Tags

Astronomy, Virtual Observatory, TAP, ADQL, NASA, IPAC, Open Data

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/caltech/ned-tap/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/caltech/.