# Chemaxon Builtin Checker API

**Canonical:** https://apis.io/apis/chemaxon/chemaxon-builtin-checker-api/  
**Provider:** Chemaxon — https://apis.io/providers/chemaxon/  
**Base URL:** https://jchem-microservices.chemaxon.com/jws-checker-fixer  
**Documentation:** https://jchem-microservices.chemaxon.com/jws-calculations/api/index.html

Chemaxon Builtin Checker API is one of 40 APIs that [Chemaxon](https://apis.io/providers/chemaxon/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. This API exposes 1 JSON Schema definition. Tagged areas include Builtin Checker. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and 1 JSON Schema.

The Builtin Checker API from Chemaxon — 65 operation(s) for builtin checker.

## Operations (60 of 65)

| Method | Path | Summary |
|---|---|---|
| POST | `/rest-v1/checker/abbreviated-group/` | Abbreviated group checker |
| POST | `/rest-v1/checker/absent-chiral-flag/` | Absent chiral flag checker |
| POST | `/rest-v1/checker/absolute-stereo-configuration/` | Absolute stereo configuration checker |
| POST | `/rest-v1/checker/alias/` | Alias checker |
| POST | `/rest-v1/checker/aromaticity-error/` | Aromaticity error checker |
| POST | `/rest-v1/checker/atom-map/` | Atom map checker |
| POST | `/rest-v1/checker/atom-query-property/` | Atom query property checker |
| POST | `/rest-v1/checker/atom-type/` | Atom type checker |
| POST | `/rest-v1/checker/atom-value/` | Atom value checker |
| POST | `/rest-v1/checker/atropisomer/` | Atropisomer checker |
| POST | `/rest-v1/checker/attached-data/` | Attached data checker |
| POST | `/rest-v1/checker/bond-angle/` | Bond angle checker |
| POST | `/rest-v1/checker/bond-length/` | Bond length checker |
| POST | `/rest-v1/checker/brackets/` | Brackets checker |
| POST | `/rest-v1/checker/chiral-flag-error/` | Chiral flag error checker |
| POST | `/rest-v1/checker/chiral-flag/` | Chiral flag checker |
| POST | `/rest-v1/checker/circular-rgroup-reference/` | Circular R-group reference checker |
| POST | `/rest-v1/checker/coordination-system-error/` | Coordination system error checker |
| POST | `/rest-v1/checker/covalent-counterion/` | Covalent counterion checker |
| POST | `/rest-v1/checker/crossed-double-bond/` | Crossed double bond checker |
| POST | `/rest-v1/checker/double-bond-stereo-error/` | Double bond stereo error checker |
| POST | `/rest-v1/checker/e-z-double-bond/` | E/Z double bond checker |
| POST | `/rest-v1/checker/empty-structure/` | Empty structure checker |
| POST | `/rest-v1/checker/explicit-hydrogen/` | Explicit hydrogen checker |
| POST | `/rest-v1/checker/explicit-lone-pair/` | Explicit lone pair checker |
| POST | `/rest-v1/checker/incorrect-tetrahedral-stereo/` | Incorrect tetrahedral stereo checker |
| POST | `/rest-v1/checker/isotope/` | Isotope checker |
| POST | `/rest-v1/checker/metallocene-error/` | Metallocene error checker |
| POST | `/rest-v1/checker/missing-atom-map/` | Missing atom map checker |
| POST | `/rest-v1/checker/missing-rgroup/` | Missing R-group checker |
| POST | `/rest-v1/checker/molecule-charge/` | Molecule charge checker |
| POST | `/rest-v1/checker/multicenter/` | Multicenter checker |
| POST | `/rest-v1/checker/multiple-component/` | Multi component checker |
| POST | `/rest-v1/checker/multiple-stereocenter/` | Multiple stereocenter checker |
| POST | `/rest-v1/checker/non-standard-wedge-scheme/` | Non standard wedge scheme checker |
| POST | `/rest-v1/checker/non-stereo-wedge-bond/` | Non stereo wedge bond checker |
| POST | `/rest-v1/checker/ocr-error/` | OCR error checker |
| POST | `/rest-v1/checker/overlapping-atoms/` | Overlapping atoms checker |
| POST | `/rest-v1/checker/overlapping-bonds/` | Overlapping bonds checker |
| POST | `/rest-v1/checker/pseudo-atom/` | Pseudo atom checker |
| POST | `/rest-v1/checker/query-atom/` | Query atom checker |
| POST | `/rest-v1/checker/query-bond/` | Query bond checker |
| POST | `/rest-v1/checker/racemate/` | Racemate checker |
| POST | `/rest-v1/checker/radical/` | Radical checker |
| POST | `/rest-v1/checker/rare-element/` | Rare element checker |
| POST | `/rest-v1/checker/ratom/` | R-atom checker |
| POST | `/rest-v1/checker/reacting-center-bond-mark/` | Reacting center bond mark checker |
| POST | `/rest-v1/checker/reaction-map-error/` | Reaction map error checker |
| POST | `/rest-v1/checker/relative-stereo/` | Relative stereo checker |
| POST | `/rest-v1/checker/rgroup-attachment-error/` | R-group attachment error checker |
| POST | `/rest-v1/checker/rgroup-bridge-ratom/` | R-group bridge R-atom checker |
| POST | `/rest-v1/checker/ring-strain-error/` | Ring strain error checker |
| POST | `/rest-v1/checker/solvent/` | Solvent checker |
| POST | `/rest-v1/checker/star-atom/` | Star atom checker |
| POST | `/rest-v1/checker/stereo-care-box/` | Stereo care box checker |
| POST | `/rest-v1/checker/stereo-inversion-retention-mark/` | Stereo inversion retention mark checker |
| POST | `/rest-v1/checker/straight-double-bond/` | Straight double bond checker |
| POST | `/rest-v1/checker/substructure/` | Substructure checker |
| POST | `/rest-v1/checker/three-dimension/` | Three dimension checker |
| POST | `/rest-v1/checker/unbalanced-reaction/` | Unbalanced reaction checker |

…and 5 more operations. They are listed in full on the page.

## Machine-readable artifacts (4)

- **OpenAPI** — https://artifacts.apis.io/chemaxon/openapi/chemaxon-builtin-checker-api-openapi.yml
- **Documentation** — https://docs.chemaxon.com/latest/jchem-microservices_developer-guide.html
- **JSONSchema** — https://artifacts.apis.io/chemaxon/json-schema/chemaxon-metallocene-checker-response-schema.json
- **Documentation** — https://docs.chemaxon.com/latest/compound-registration_api-documentation.html

## Other Chemaxon APIs (12)

- [Chemaxon Amendment API](https://apis.io/apis/chemaxon/chemaxon-amendment-api/)
- [Chemaxon Audit API](https://apis.io/apis/chemaxon/chemaxon-audit-api/)
- [Chemaxon Auto Mapper API](https://apis.io/apis/chemaxon/chemaxon-automapper-api/)
- [Chemaxon Bulk amendment API](https://apis.io/apis/chemaxon/chemaxon-bulk-amendment-api/)
- [Chemaxon Bulk registration API](https://apis.io/apis/chemaxon/chemaxon-bulk-registration-api/)
- [Chemaxon Bulk upload API](https://apis.io/apis/chemaxon/chemaxon-bulk-upload-api/)
- [Chemaxon Calculator API](https://apis.io/apis/chemaxon/chemaxon-calculator-api/)
- [Chemaxon Checker API](https://apis.io/apis/chemaxon/chemaxon-checker-api/)
- [Chemaxon Checker Descriptor API](https://apis.io/apis/chemaxon/chemaxon-checker-descriptor-api/)
- [Chemaxon Checker Fixer API](https://apis.io/apis/chemaxon/chemaxon-checker-fixer-api/)
- [Chemaxon Chemaxon built-in reactions API](https://apis.io/apis/chemaxon/chemaxon-chemaxon-built-in-reactions-api/)
- [Chemaxon Chemical-term evaluation API](https://apis.io/apis/chemaxon/chemaxon-chemical-term-evaluation-api/)

## Tags

Builtin Checker

---

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