# How can we help?

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[About our API documentation](https://support.cordial.com/hc/en-us/articles/204570187-About-our-API-documentation)

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[RESTful API summary and usage](https://support.cordial.com/hc/en-us/articles/203885498-RESTful-API-summary-and-usage)

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[Functional API groups](https://support.cordial.com/hc/en-us/articles/203885828-Functional-API-groups)

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[Use Swagger to access and test Cordial APIs](https://support.cordial.com/hc/en-us/articles/216197618-Use-Swagger-to-access-and-test-Cordial-APIs)

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[Global API error responses](https://support.cordial.com/hc/en-us/articles/4402427843597-Global-API-error-responses)

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[API rate limiting](https://support.cordial.com/hc/en-us/articles/7323031900301-API-rate-limiting)

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