> For the complete documentation index, see [llms.txt](https://docs.tnid.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tnid.com/readme.md).

# Welcome

TNID API documentation: authenticate as a user or a company, then manage identity, connections, subscriptions, 10DLC and webhooks over two GraphQL servers.

TNID makes creating your personal and business identity a breeze. Connect with people and companies you care about, and manage your preferences with them in one simple to use interface.

### Document Formatting <a href="#document-formatting" id="document-formatting"></a>

We generally format our API documents in the following manner:

1. Overview: the purpose of the end-point
2. Authentication: how to authenticate to the end-point
3. Method: details regarding the API method and examples.

All TNID APIs are GraphQL based. Throughout the documentation, we use common HTTP features such as HTTP verbs and HTTP status codes. Requests must be made via HTTPS (calls over plain HTTP will fail).

Happy coding!

### Jump right in!

<table data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-cover data-type="files"></th><th data-hidden></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>Company Authentication</strong></td><td>Learn how to login as a Company and use features available to businesses.</td><td></td><td></td><td></td></tr><tr><td><strong>User Authentication</strong></td><td>Login as a User and use features available to individuals, including spam reporting.</td><td></td><td></td><td></td></tr></tbody></table>

### For developers and AI assistants

* [API Quick Reference](/api-quick-reference.md): environments, authentication, every feature area, webhooks and pagination on one page.
* [AI Assistants & MCP](/ai-assistants-and-mcp.md): connect Claude, Cursor, VS Code or Codex to these docs, or ask the docs a question from inside the API.
* [API Reference](https://docs.tnid.com/api-reference/): every query, mutation, type and enum, generated from the API source.
* [Changelog](/changelog.md): what changed in the API and in these docs.