> For the complete documentation index, see [llms.txt](https://support.iafcertsearch.org/verification-users-api-developer-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.iafcertsearch.org/verification-users-api-developer-guide/api-integration.md).

# API Integration

- [Getting Started](https://support.iafcertsearch.org/verification-users-api-developer-guide/api-integration/readme.md)
- [Authentication](https://support.iafcertsearch.org/verification-users-api-developer-guide/api-integration/authentication.md)
- [Requests](https://support.iafcertsearch.org/verification-users-api-developer-guide/api-integration/requests.md)
- [Responses](https://support.iafcertsearch.org/verification-users-api-developer-guide/api-integration/responses.md)
- [Errors](https://support.iafcertsearch.org/verification-users-api-developer-guide/api-integration/errors.md)
- [Verification APIs](https://support.iafcertsearch.org/verification-users-api-developer-guide/api-integration/verification-apis.md)
- [Match Companies](https://support.iafcertsearch.org/verification-users-api-developer-guide/api-integration/verification-apis/match-companies.md)
- [Retrieve Company & Certificates by IAF ID](https://support.iafcertsearch.org/verification-users-api-developer-guide/api-integration/verification-apis/retrieve-company-and-certificates-by-iaf-id.md)
- [Bulk Retrieve Company & Certificates by IAF ID](https://support.iafcertsearch.org/verification-users-api-developer-guide/api-integration/verification-apis/bulk-retrieve-company-and-certificates-by-iaf-id.md)
- [Retrieve Certificate by IAF ID](https://support.iafcertsearch.org/verification-users-api-developer-guide/api-integration/verification-apis/retrieve-certificate-by-iaf-id.md)
- [Retrieve Company & Certificates](https://support.iafcertsearch.org/verification-users-api-developer-guide/api-integration/verification-apis/retrieve-company-and-certificates.md)
- [Bulk Retrieve Companies & Certificates](https://support.iafcertsearch.org/verification-users-api-developer-guide/api-integration/verification-apis/bulk-retrieve-companies-and-certificates.md)
- [API Credit Consumption](https://support.iafcertsearch.org/verification-users-api-developer-guide/api-integration/api-credit-consumption.md)
- [Grace Period: Free Re-Verification](https://support.iafcertsearch.org/verification-users-api-developer-guide/api-integration/api-credit-consumption/grace-period-free-re-verification.md)
- [Credit Limits & Overage Charges](https://support.iafcertsearch.org/verification-users-api-developer-guide/api-integration/api-credit-consumption/credit-limits-and-overage-charges.md)
- [Consumption Decision Flow](https://support.iafcertsearch.org/verification-users-api-developer-guide/api-integration/api-credit-consumption/consumption-decision-flow.md)