# Create communities URL: https://docs.hanzo.ai/docs/openapi/graph/graphcommunities > Partitions the edge graph into sets of entities more densely connected to each other than to the rest. `POST /v1/graph/communities` > [Graph →](https://docs.hanzo.ai/docs/openapi/graph) · [All API references →](https://docs.hanzo.ai/docs/openapi) · [Get started →](https://docs.hanzo.ai/docs/guides) | | | | ------------- | ------------------------------------------- | | **Address** | `https://api.hanzo.ai/v1/graph/communities` | | **Method** | `POST` | | **Operation** | `graphCommunities` | | **Auth** | `Authorization: Bearer $HANZO_API_KEY` | Partitions the edge graph into sets of entities more densely connected to each other than to the rest. The graph is the one a walk reads, direction dropped, and the partition is deterministic: the same graph at the same point numbers the same communities. Time: as\_of and as\_known place the graph that is partitioned; either absent is now. ## Request 4 fields, body `application/json` (required). | Field | In | Type | Required | Description | | ---------- | ---- | --------------- | -------- | ------------------------------------------------------------------------------------------------------------------------------------------------ | | `as_known` | body | string | — | AsKnown is how much this plane had heard, RFC 3339: the answer as it would have been given then, which is what makes a past answer reproducible. | | `as_of` | body | string | — | AsOf partitions the graph as it stood at an instant of the world, RFC 3339: the edges that held then. | | `level` | body | integer (int64) | — | Level is how fine a partition to answer with. | | `relation` | body | string | — | Relation narrows the graph to one edge relation, by its key. | ## Response | Status | Body | Meaning | | --------- | ------------------------- | ------- | | `200` | graph.graphCommunitiesOut | ok | | `default` | problem-details | refused | `200` body — 14 fields. | Field | In | Type | Always | Description | | ----------------------- | ---- | ----------------------- | ------ | -------------------------------------------------------------------------------------------------------------------------------------------------- | | `as_known` | body | string | — | AsKnown is the knowledge instant it was taken at, RFC 3339, the same way. | | `as_of` | body | string | — | AsOf is the instant the graph was read at, RFC 3339: the one asked for, or the server's clock when none was. | | `bound` | body | integer (int64) | — | Bound is the most members listed in one answer. | | `ceiling` | body | integer (int64) | — | Ceiling is the most edge assertions one partition reads — every row, so an edge three sources asserted counts three times. | | `communities` | body | graph.graphCommunity\[] | — | Communities are the communities, largest first. | | `communities[].id` | body | integer (int64) | — | ID numbers the community by size, largest first, then by its lowest key. | | `communities[].members` | body | string\[] | — | Members are the entities in it, in key order. | | `communities[].size` | body | integer (int64) | — | Size is how many entities belong to it, whether or not all are listed. | | `edges` | body | integer (int64) | — | Edges is how many distinct undirected edges were partitioned. | | `entities` | body | integer (int64) | — | Entities is how many entities the edge graph holds. | | `level` | body | integer (int64) | — | Level is the level answered. | | `levels` | body | integer (int64) | — | Levels is how many levels detection found. | | `modularity` | body | number (double) | — | Modularity is Newman's Q of this level's partition, from -0.5 to 1: the share of edge weight inside communities, less what chance would put there. | | `truncated` | body | boolean | — | Truncated says the member lists stop at Bound entities in all, filled in community order. | Failure carries the platform error shape — see [Errors](https://docs.hanzo.ai/docs/errors). ## Examples **CLI** ```bash hanzo graph communities ``` **SDK** **.ts** ```ts import { Configuration, GraphApi } from 'hanzoai'; const api = new GraphApi(new Configuration({ accessToken: process.env.HANZO_API_KEY })); const { data } = await api.graphCommunities({ as_known: "", as_of: "" }); ``` **.py** ```python from hanzoai.cloud import ApiClient, Configuration from hanzoai.cloud.api import GraphApi client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"])) result = GraphApi(client).graph_communities(as_known="", as_of="") ``` **.go** ```go cfg := hanzoai.NewConfiguration() cfg.AddDefaultHeader("Authorization", "Bearer "+os.Getenv("HANZO_API_KEY")) client := hanzoai.NewAPIClient(cfg) resp, _, err := client.GraphAPI.GraphCommunities(context.Background()).Execute() if err != nil { return err } ``` **.rs** ```rust use hanzo_client::apis::{configuration::Configuration, graph_api}; let mut cfg = Configuration::new(); cfg.bearer_access_token = std::env::var("HANZO_API_KEY").ok(); let result = graph_api::graph_communities(&cfg, Default::default()).await?; ``` **.java** ```java import ai.hanzo.cloud.ApiClient; import ai.hanzo.cloud.api.GraphApi; ApiClient client = new ApiClient(); client.setBearerToken(System.getenv("HANZO_API_KEY")); var result = new GraphApi(client).graphCommunities(); ``` **HTTP** ```bash curl -X POST https://api.hanzo.ai/v1/graph/communities \ -H "Authorization: Bearer $HANZO_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "as_known": "", "as_of": "" }' ``` **MCP** Tool `graph`, op `graphCommunities` — POST the JSON-RPC envelope to `https://api.hanzo.ai/v1/mcp`. ```bash curl -X POST https://api.hanzo.ai/v1/mcp \ -H "Authorization: Bearer $HANZO_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": { "name": "graph", "arguments": { "op": "graphCommunities", "input": { "as_known": "", "as_of": "" } } } }' ``` --- [Graph API](https://docs.hanzo.ai/docs/openapi/graph) · [All Hanzo APIs](https://docs.hanzo.ai/docs/openapi) · [Interactive reference](https://docs.hanzo.ai/docs/openapi/reference)