# Pubchem

4 endpoints on Pubchem. Every one returns the same response shape and has a flat, published price in credits.

Category: [Science & research](https://onekey.dev/docs/categories/science.md) · [Overview page](https://onekey.dev/platforms/pubchem)

## Endpoints

| Endpoint | What it does | Cost | Status |
| --- | --- | --- | --- |
| [`compound_by_cid`](https://onekey.dev/docs/api/pubchem/compound_by_cid.md) | Chemical compound properties by PubChem CID. | 1 credit | stable |
| [`compound_by_name`](https://onekey.dev/docs/api/pubchem/compound_by_name.md) | Chemical compound properties by name (PubChem). | 1 credit | stable |
| [`description`](https://onekey.dev/docs/api/pubchem/description.md) | Textual description of a compound (PubChem). | 1 credit | stable |
| [`synonyms`](https://onekey.dev/docs/api/pubchem/synonyms.md) | Synonyms of a chemical compound (PubChem). | 5 credits | stable |

Every endpoint page has a **Field mapping** section showing which source field becomes which [unified field](https://onekey.dev/docs/schema.md) (fixed schema) or platform-specific `ext.` field.