# PubChem Identifier Exchange Service

**Canonical:** https://apis.io/apis/pubchem/pubchem-identifier-exchange-service/  
**Provider:** PubChem — https://apis.io/providers/pubchem/  
**Base URL:** https://pubchem.ncbi.nlm.nih.gov/idexchange  
**Documentation:** https://pubchem.ncbi.nlm.nih.gov/idexchange/idexchange.cgi

PubChem Identifier Exchange Service is one of 7 APIs that [PubChem](https://apis.io/providers/pubchem/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Identifier Conversion, CAS Numbers, ChEMBL, ChEBI, and Registry IDs. The published artifact set on APIs.io includes API documentation.

Bulk identifier conversion service for translating between PubChem CIDs, SIDs, and external identifiers such as CAS Registry Numbers, ChEMBL IDs, ChEBI IDs, and other registry identifiers at scale.

## Machine-readable artifacts (1)

- **Documentation** — https://pubchem.ncbi.nlm.nih.gov/docs/identifier-exchange-service

## Other PubChem APIs (6)

- [PubChem PUG View API](https://apis.io/apis/pubchem/pubchem-pug-view-api/)
- [PubChem PUG SOAP API](https://apis.io/apis/pubchem/pubchem-pug-soap-api/)
- [PubChem Structure Image Service](https://apis.io/apis/pubchem/pubchem-structure-image-service/)
- [PubChem Compounds API](https://apis.io/apis/pubchem/pubchem-compounds-api/)
- [PubChem Structure Search API](https://apis.io/apis/pubchem/pubchem-structure-search-api/)
- [PubChem Utilities API](https://apis.io/apis/pubchem/pubchem-utilities-api/)

## Tags

Identifier Conversion, CAS Numbers, ChEMBL, ChEBI, Registry IDs

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