# Function URL: https://docs.hanzo.ai/docs/openapi/function > Your serverless code: publish it, call it over HTTP, watch every run and what it cost. Also for this capability: **API** · [CLI](https://docs.hanzo.ai/docs/cli/function) · [MCP](https://docs.hanzo.ai/docs/mcp-tools/function) · [SDKs](https://docs.hanzo.ai/docs/sdks) Your serverless code: publish it, call it over HTTP, watch every run and what it cost. > [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: function` 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** | `function` at its own prefix | 11 operations | | **CLI** | `hanzo function …` | 11 of 11 | | **SDK** | `FunctionApi` in every published client | 11 methods | | **MCP** | tool `function` on `https://api.hanzo.ai/v1/mcp` | 10 operations, 1 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/function`, operation `get_function`: **CLI** ```bash hanzo function list ``` **SDK** **.ts** ```ts import { Configuration, FunctionApi } from 'hanzoai'; const api = new FunctionApi(new Configuration({ accessToken: process.env.HANZO_API_KEY })); const { data } = await api.getFunction(); ``` **.py** ```python from hanzoai.cloud import ApiClient, Configuration from hanzoai.cloud.api import FunctionApi client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"])) result = FunctionApi(client).get_function() ``` **.go** ```go cfg := hanzoai.NewConfiguration() cfg.AddDefaultHeader("Authorization", "Bearer "+os.Getenv("HANZO_API_KEY")) client := hanzoai.NewAPIClient(cfg) resp, _, err := client.FunctionAPI.GetFunction(context.Background()).Execute() if err != nil { return err } ``` **.rs** ```rust use hanzo_client::apis::{configuration::Configuration, function_api}; let mut cfg = Configuration::new(); cfg.bearer_access_token = std::env::var("HANZO_API_KEY").ok(); let result = function_api::get_function(&cfg, Default::default()).await?; ``` **.java** ```java import ai.hanzo.cloud.ApiClient; import ai.hanzo.cloud.api.FunctionApi; ApiClient client = new ApiClient(); client.setBearerToken(System.getenv("HANZO_API_KEY")); var result = new FunctionApi(client).getFunction(); ``` **HTTP** ```bash curl https://api.hanzo.ai/v1/function \ -H "Authorization: Bearer $HANZO_API_KEY" ``` **MCP** MCP reaches **function** through the `function` tool, which names its 10 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_functions" } } }' ``` Answers `200` with `object` — ok. ## Endpoints | Endpoint | What it does | | --------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [`GET /v1/function/{name}/invocations`](https://docs.hanzo.ai/docs/openapi/function/get-function-by-name-invocations) | One function's past runs, newest first — each with its status, HTTP code, method, time and duration. | | [`POST /v1/function/{name}/invoke`](https://docs.hanzo.ai/docs/openapi/function/post-function-by-name-invoke) | Runs a function and records a REAL invocation. | | [`GET /v1/function/{name}/logs`](https://docs.hanzo.ai/docs/openapi/function/get-function-by-name-logs) | The output of a function's most recent run — its error text when that run failed, else what it printed. | | [`GET /v1/function/{name}`](https://docs.hanzo.ai/docs/openapi/function/get-function-by-name) | One function with everything a detail page needs in one round-trip: its definition, its 7-day rollup, its trigger, its twenty most recent invocations and the NAMES of the secrets it mounts. | | [`DELETE /v1/function/{name}`](https://docs.hanzo.ai/docs/openapi/function/delete-function-by-name) | Removes one of the caller org's functions and answers 204. | | [`GET /v1/function/deployments`](https://docs.hanzo.ai/docs/openapi/function/get-function-deployments) | What is live right now — each function's current record IS its live deployment, so this is the deployment inventory. | | [`GET /v1/function/metrics`](https://docs.hanzo.ai/docs/openapi/function/get-function-metrics) | The org's serverless dashboard over a window: a per-function invocation costLine and how those invocations ended. | | [`GET /v1/function/secrets`](https://docs.hanzo.ai/docs/openapi/function/get-function-secrets) | The NAMES of the secrets the caller org's functions mount. | | [`GET /v1/function/triggers`](https://docs.hanzo.ai/docs/openapi/function/get-function-triggers) | What calls the caller org's functions — one row per function. | | [`GET /v1/function`](https://docs.hanzo.ai/docs/openapi/function/get-function) | Every serverless function the caller's org has published, each with its real 7-day rollup. | | [`POST /v1/function`](https://docs.hanzo.ai/docs/openapi/function/post-function) | Publishes a serverless function under the caller's org and answers 201 with it. | --- [All Hanzo APIs](https://docs.hanzo.ai/docs/openapi) · [Interactive reference](https://docs.hanzo.ai/docs/openapi/reference)