> For the complete documentation index, see [llms.txt](https://relationlabs.gitbook.io/relation-graph/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://relationlabs.gitbook.io/relation-graph/api.md).

# API

- [Relation One Profile](https://relationlabs.gitbook.io/relation-graph/api/profile.md): Relaton
- [NFT List](https://relationlabs.gitbook.io/relation-graph/api/nft-list.md)
- [SBT List](https://relationlabs.gitbook.io/relation-graph/api/sbt-list.md)
- [User Tag](https://relationlabs.gitbook.io/relation-graph/api/user-tag.md)
- [Relationship Graph](https://relationlabs.gitbook.io/relation-graph/api/relationship-graph.md)
- [Multi-dimensional Recommendation](https://relationlabs.gitbook.io/relation-graph/api/multi-dimensional-recommendation.md)
- [Secure Cross-Platform Identity Linking](https://relationlabs.gitbook.io/relation-graph/api/cross-platform-identity-linking.md)
- [Mutual Friend](https://relationlabs.gitbook.io/relation-graph/api/mutual-friend.md)
- [Mutual Contract Interaction](https://relationlabs.gitbook.io/relation-graph/api/mutual-contract-interaction.md)
- [Unified Identity Verification](https://relationlabs.gitbook.io/relation-graph/api/unified-dentity-verification.md)