# Link URL: https://docs.hanzo.ai/docs/openapi/link > The unified AI login manager's registry: the org+user-scoped record of WHICH provider accounts (Claude Max, ChatGPT Plus, a Hanzo API key, a raw provider key) a developer has signed into, ON WHICH MACHINES, with each account's latest usage snapshot. Also for this capability: **API** · [CLI](https://docs.hanzo.ai/docs/cli/link) · [MCP](https://docs.hanzo.ai/docs/mcp-tools/link) · [SDKs](https://docs.hanzo.ai/docs/sdks) The unified AI login manager's registry: the org+user-scoped record of WHICH provider accounts (Claude Max, ChatGPT Plus, a Hanzo API key, a raw provider key) a developer has signed into, ON WHICH MACHINES, with each account's latest usage snapshot. > [All API references →](https://docs.hanzo.ai/docs/openapi) · [Get started →](https://docs.hanzo.ai/docs/guides) | | | | -------------- | -------------------------------------- | | **Base URL** | `https://api.hanzo.ai` | | **Operations** | 11 | | **Auth** | `Authorization: Bearer $HANZO_API_KEY` | ## Specification Specification pending — no HIP in [hanzoai/hips](https://github.com/hanzoai/hips) declares `capability: link` yet. What this capability serves is below, from the API document; what it is — the store it owns, how it meters, what it publishes — is written as a HIP under HIP-0139. ## Four surfaces | Surface | Reaches this capability as | Coverage | | -------- | -------------------------------------------- | -------------------------------------------------------------------------- | | **REST** | `link` at its own prefix | 11 operations | | **CLI** | `hanzo auth …` | 11 of 11 | | **SDK** | `LinkApi` in every published client | 11 methods | | **MCP** | tool `link` on `https://api.hanzo.ai/v1/mcp` | 11 operations, 4 under the document's own id — ask `describe` for the rest | ## Quickstart ```bash export HANZO_API_KEY=sk-... # console.hanzo.ai → API keys ``` Then the first call — a read that needs nothing but the key. `GET /v1/link`, operation `get_link`: **CLI** ```bash hanzo auth link list ``` **SDK** **.ts** ```ts import { Configuration, LinkApi } from 'hanzoai'; const api = new LinkApi(new Configuration({ accessToken: process.env.HANZO_API_KEY })); const { data } = await api.getLink(); ``` **.py** ```python from hanzoai.cloud import ApiClient, Configuration from hanzoai.cloud.api import LinkApi client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"])) result = LinkApi(client).get_link() ``` **.go** ```go cfg := hanzoai.NewConfiguration() cfg.AddDefaultHeader("Authorization", "Bearer "+os.Getenv("HANZO_API_KEY")) client := hanzoai.NewAPIClient(cfg) resp, _, err := client.LinkAPI.GetLink(context.Background()).Execute() if err != nil { return err } ``` **.rs** ```rust use hanzo_client::apis::{configuration::Configuration, link_api}; let mut cfg = Configuration::new(); cfg.bearer_access_token = std::env::var("HANZO_API_KEY").ok(); let result = link_api::get_link(&cfg, Default::default()).await?; ``` **.java** ```java import ai.hanzo.cloud.ApiClient; import ai.hanzo.cloud.api.LinkApi; ApiClient client = new ApiClient(); client.setBearerToken(System.getenv("HANZO_API_KEY")); var result = new LinkApi(client).getLink(); ``` **HTTP** ```bash curl https://api.hanzo.ai/v1/link \ -H "Authorization: Bearer $HANZO_API_KEY" ``` **MCP** MCP reaches **link** through the `link` tool, which names its 11 operations with its own verbs — this one among them, under a name only MCP declares. `describe` explains any of them: ```bash curl -X POST https://api.hanzo.ai/v1/mcp \ -H "Content-Type: application/json" \ -d '{ "jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": { "name": "describe", "arguments": { "op": "list_links" } } }' ``` Answers `200` with `object` — ok. ## Endpoints | Endpoint | What it does | | ----------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------ | | [`GET /v1/link/{id}`](https://docs.hanzo.ai/docs/openapi/link/get-link-by-id) | Reads one linked account. | | [`DELETE /v1/link/{id}`](https://docs.hanzo.ai/docs/openapi/link/delete-link-by-id) | Logs out one account and stops the sessions it was running. | | [`POST /v1/link/devices/{machine}/revoke`](https://docs.hanzo.ai/docs/openapi/link/post-link-devices-by-machine-revoke) | Logs out every account on one machine and stops its sessions. | | [`GET /v1/link/devices/{machine}`](https://docs.hanzo.ai/docs/openapi/link/get-link-devices-by-machine) | Shows one machine: its accounts, usage and live sessions. | | [`GET /v1/link/route`](https://docs.hanzo.ai/docs/openapi/link/get-link-route) | Gets the failover order across your linked accounts. | | [`GET /v1/link/usage/accounts`](https://docs.hanzo.ai/docs/openapi/link/get-link-usage-accounts) | Breaks down what the gateway routed through each of your accounts. | | [`GET /v1/link/usage/summary`](https://docs.hanzo.ai/docs/openapi/link/get-link-usage-summary) | Shows plan consumption and Hanzo spend side by side. | | [`GET /v1/link/usage`](https://docs.hanzo.ai/docs/openapi/link/get-link-usage) | Shows one provider account's own usage dashboard. | | [`POST /v1/link/usage`](https://docs.hanzo.ai/docs/openapi/link/post-link-usage) | Reports usage samples from the device collector. | | [`GET /v1/link`](https://docs.hanzo.ai/docs/openapi/link/get-link) | Lists your linked accounts and the devices they sit on. | | [`POST /v1/link`](https://docs.hanzo.ai/docs/openapi/link/post-link) | Registers a signed-in AI provider account on a machine. | --- [All Hanzo APIs](https://docs.hanzo.ai/docs/openapi) · [Interactive reference](https://docs.hanzo.ai/docs/openapi/reference)