# AbiliTec API Documentation

## API Reference
- [The Basics](https://developers.liveramp.com/abilitec-api/reference/the-basics.md): Learn about the AbiliTec API.
- [The AbiliTec Identity Graph](https://developers.liveramp.com/abilitec-api/reference/the-abilitec-identity-graph-2.md): Learn about the AbiliTec Identity Graph, how it's used by the AbiliTec API, and how it's updated.
- [AbiliTec Identifiers](https://developers.liveramp.com/abilitec-api/reference/abilitec-identifiers-1.md): Learn about the AbiliTec identifiers returned for API calls, including ID types and versions.
- [Single Transaction and Batch Request Calls](https://developers.liveramp.com/abilitec-api/reference/single-transaction-and-batch-request-calls.md)
- [About AbiliTec Identity Resolution](https://developers.liveramp.com/abilitec-api/reference/about-abilitec-identity-resolution-1.md): Learn how AbiliTec identity resolution works.
- [Data You Can Send](https://developers.liveramp.com/abilitec-api/reference/data-you-can-send.md): Learn about the data you can send in an AbiliTec API call.
- [Data That is Returned](https://developers.liveramp.com/abilitec-api/reference/data-that-is-returned.md): Learn about the data the API returns, including AbiliTec IDs and match metadata.
- [Authentication](https://developers.liveramp.com/abilitec-api/reference/getting-started.md): Learn about the AbiliTec API authentication process.
- [Request an Access Token](https://developers.liveramp.com/abilitec-api/reference/request-an-access-token-1.md): You need an access token to use the AbiliTec API.
- [Rate Limits](https://developers.liveramp.com/abilitec-api/reference/rate-limits.md)
- [About Response Documents](https://developers.liveramp.com/abilitec-api/reference/about-response-documents-1.md): Learn about the types of data that are returned.
- [Entity Documents](https://developers.liveramp.com/abilitec-api/reference/entity-documents-1.md)
- [Group Documents](https://developers.liveramp.com/abilitec-api/reference/group-documents-1.md)
- [Batch Documents](https://developers.liveramp.com/abilitec-api/reference/batch-documents-1.md)
- [Error Documents](https://developers.liveramp.com/abilitec-api/reference/error-documents-1.md)
- [About Data Bundles](https://developers.liveramp.com/abilitec-api/reference/about-data-bundles-1.md): Learn how AbiliTec API data bundles organize response data.
- [AbiliTec ID Bundles](https://developers.liveramp.com/abilitec-api/reference/abilitec-id-bundles-1.md): Learn about the different types of AbiliTec ID bundles.
- [Metadata Bundles](https://developers.liveramp.com/abilitec-api/reference/metadata-bundles-1.md)
- [contactFlags Bundle](https://developers.liveramp.com/abilitec-api/reference/contactflags-bundle-1.md)
- [emailInsights Bundle](https://developers.liveramp.com/abilitec-api/reference/emailinsights-bundle-1.md)
- [matchMetadata Bundle](https://developers.liveramp.com/abilitec-api/reference/matchmetadata-bundle-1.md)
- [validationErrors Bundle](https://developers.liveramp.com/abilitec-api/reference/validationerrors-bundle-1.md)
- [Match Endpoint](https://developers.liveramp.com/abilitec-api/reference/match-endpoint.md): Use the Match endpoint to send plaintext PII.
- [Match Endpoint - Single Transaction Calls](https://developers.liveramp.com/abilitec-api/reference/match-single-transaction-calls.md)
- [Match Endpoint - Batch Request Calls](https://developers.liveramp.com/abilitec-api/reference/match-batch-request-calls.md)
- [Lookup Endpoint](https://developers.liveramp.com/abilitec-api/reference/lookup-endpoints-1.md): Use the Lookup endpoint when you don't want to send plaintext PII.
- [Lookup Endpoint - Single Transaction Calls](https://developers.liveramp.com/abilitec-api/reference/lookup-endpoint-single-transaction.md): Make single transaction calls to the lookup endpoint to match an individual record.
- [Lookup Endpoint - Batch Request Calls](https://developers.liveramp.com/abilitec-api/reference/batch-request-endpoint-lookup.md): Make batch request calls to the lookup endpoint to match multiple records in one call.

## Changelog
- [Added llms.txt](https://developers.liveramp.com/abilitec-api/changelog/added-llmstxt.md)
- [New AbiliTec API Documentation Structure](https://developers.liveramp.com/abilitec-api/changelog/new-abilitec-api-documentation-structure.md)
- [AbiliTec API Security Enhancements](https://developers.liveramp.com/abilitec-api/changelog/identity-api-security-enhancements.md)
- [Return derived links when hashed input does not match any maintained links](https://developers.liveramp.com/abilitec-api/changelog/return-derived-links-when-hashed-input-does-not-match-any-maintained-links.md)
- [Update to Error Documents](https://developers.liveramp.com/abilitec-api/changelog/update-to-error-documents.md)