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>
> Documentation indexes by section:
> - APIs and SDKs: https://docusign.docs.buildwithfern.com/docs/llms.txt
> - Platform 101: https://docusign.docs.buildwithfern.com/platform/llms.txt
> - Extension Apps: https://docusign.docs.buildwithfern.com/extension-apps/llms.txt
> - Docusign CLI: https://docusign.docs.buildwithfern.com/docusign-cli/llms.txt
>
> Authentication (OAuth, JWT Grant, M2M): https://docusign.docs.buildwithfern.com/platform/auth
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>
> OpenAPI specifications: https://docusign.docs.buildwithfern.com/openapi.json
> MCP server: https://docusign.docs.buildwithfern.com/_mcp/server

# TSP API Reference

This reference guide contains information about the API methods used by Trust Service Providers (TSP) to get and post signing information.

The base URI for these calls should be the value from the `user_api` parameter returned in the Token Response. These API’s are only supported in Docusign REST API version v2, so the `apiVersion` in the following requests should be `v2`.

## Docs

- [Get TSP User Information](https://developers.docusign.com/docs/tsp-api/reference/get-tsp-user-information.md)
- [TSP Sign Hash Session Information](https://developers.docusign.com/docs/tsp-api/reference/sign-hash-session-information.md)
- [TSP Complete Sign Hash Session Information](https://developers.docusign.com/docs/tsp-api/reference/complete-sign-hash-session-information.md)
- [POST SignedAttributes](https://developers.docusign.com/docs/tsp-api/reference/post-signed-attributes.md)
- [POST CMS](https://developers.docusign.com/docs/tsp-api/reference/post-cms.md)
- [Update Transaction](https://developers.docusign.com/docs/tsp-api/reference/update-transaction.md)
- [Create Files](https://developers.docusign.com/docs/tsp-api/reference/create-files.md): Discover how to upload the evidence files to Docusign's secure storage system for use in digital signature transactions.