Publishes a serverless function under the caller's org and answers 201 with it.

POST /v1/functions

Functions → · All API references → · Six flows, four surfaces →


Address	`https://api.hanzo.ai/v1/functions`
Method	`POST`
Operation	`post_functions`
Auth	`Authorization: Bearer $HANZO_API_KEY`

The name is the key and is claimed once; the names that would shadow a collection route are reserved. runtime and environment are the same field — either spelling is accepted — and default to node.

Bounds are clamped rather than refused where a clamp is honest: a timeout above the 900-second ceiling becomes the ceiling instead of silently reverting to the 30-second default, and an omitted memory limit becomes 256Mi. target=fleet runs on the org's own GPU fleet and supports runtime=python only.

Requires a validated principal; the function is owned by that principal's org.

Request

11 fields, body application/json (required).

Field	In	Type	Required	Description
`code`	body	string	—	Code is the source to run, capped so one function cannot amplify the store.
`envNames`	body	string[]	—	EnvNames are the secret NAMES to mount.
`environment`	body	string	—	Environment is a second spelling of runtime, accepted so a console that says "environment" needs no translation.
`handler`	body	string	—	Handler is the entry point within the code.
`image`	body	string	—	Image names a prebuilt image to run instead of source.
`memoryLimit`	body	string	—	MemoryLimit is the memory the function runs with, defaulting to 256Mi.
`name`	body	string	yes	Name is the function's org-unique handle and the segment that addresses it, matching ^[A-Za-z0-9][A-Za-z0-9._-]{0,63}$.
`namespace`	body	string	—	Namespace groups functions for display.
`runtime`	body	string	—	Runtime is the language the code runs under: node, python or deno.
`target`	body	string	—	Target is where the function runs: sandbox (the default) or fleet, the org's own GPU fleet.
`timeoutSec`	body	integer	—	TimeoutSec is the per-invocation deadline, defaulting to 30 and clamped at 900 — a larger value is capped rather than reset to the default.

Response

Status	Body	Meaning
`201`	functionView	created

201 body — 16 fields.

Field	In	Type	Always	Description
`avgDurationMs`	body	number	—	mean wall-clock of those runs
`createdAt`	body	string	—	when it was first published
`endpoint`	body	string	—	the path that invokes it
`envCount`	body	integer	—	how many secret NAMES it mounts; values are never carried
`environment`	body	string	—	the language it runs under
`errors7d`	body	integer	—	how many of those runs failed
`image`	body	string	—	the prebuilt image it runs, when it runs one instead of source
`invocations7d`	body	integer	—	runs in the last 7 days; ABSENT, never 0, when it has not run
`lastDeployedAt`	body	string	—	when its code last changed
`memoryLimit`	body	string	—	the memory it runs with, and the multiplier on its compute charge
`name`	body	string	—	the function's org-unique handle
`namespace`	body	string	—	the display group it belongs to; the org is the isolation key
`status`	body	string	—	whether it is ready to serve
`successRate`	body	number	—	share of those runs that succeeded, 0..1
`target`	body	string	—	where it runs: empty for the sandbox, "fleet" for the org's GPU fleet
`timeoutSec`	body	integer	—	its per-invocation deadline

Failure carries the platform error shape — see Errors.

Examples

hanzo functions create --name <name>

import { Configuration, FunctionsApi } from 'hanzoai';

const api = new FunctionsApi(new Configuration({ accessToken: process.env.HANZO_API_KEY }));
const { data } = await api.postFunctions({ name: "<name>" });

from hanzoai.cloud import ApiClient, Configuration
from hanzoai.cloud.api import FunctionsApi

client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"]))
result = FunctionsApi(client).post_functions(name="<name>")

cfg := cloud.NewConfiguration()
cfg.AddDefaultHeader("Authorization", "Bearer "+os.Getenv("HANZO_API_KEY"))
client := cloud.NewAPIClient(cfg)

resp, _, err := client.FunctionsAPI.PostFunctions(context.Background()).Execute()
if err != nil {
	return err
}

use hanzo_cloud::apis::{configuration::Configuration, functions_api};

let mut cfg = Configuration::new();
cfg.bearer_access_token = std::env::var("HANZO_API_KEY").ok();

let result = functions_api::post_functions(&cfg, Default::default()).await?;

import ai.hanzo.cloud.ApiClient;
import ai.hanzo.cloud.api.FunctionsApi;

ApiClient client = new ApiClient();
client.setRequestInterceptor(b -> b.header("Authorization", "Bearer " + System.getenv("HANZO_API_KEY")));

var result = new FunctionsApi(client).postFunctions();

curl -X POST https://api.hanzo.ai/v1/functions \
  -H "Authorization: Bearer $HANZO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
       "name": "<name>"
     }'

The door reaches functions through the functions tool, which names its 10 operations with its own verbs — this one among them, under a name only the door declares. describe explains any of them:

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"
         }
       }
     }'

Functions API · All Hanzo APIs · Interactive reference

Publishes a serverless function under the caller's org and answers 201 with it.

Request

Response

Examples

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