# Create diff URL: https://docs.hanzo.ai/docs/openapi/graph/graphdiff > Reports what came into force, was superseded and was retracted between two points. `POST /v1/graph/diff` > [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/diff` | | **Method** | `POST` | | **Operation** | `graphDiff` | | **Auth** | `Authorization: Bearer $HANZO_API_KEY` | Reports what came into force, was superseded and was retracted between two points. Each point is resolved as resolve would, never read off the rows in between. A version that loses the order is invisible here as it is there, and one that repeats what held is agreement, not change. Time: a point is an as\_of and an as\_known instant, from and from\_known against to and to\_known. Hold the known instants equal for what happened in the world; hold the valid instants equal for what the record learned. to and to\_known default to now, from to to and from\_known to to\_known, and the two points must differ. ## Request 6 fields, body `application/json` (required). | Field | In | Type | Required | Description | | ------------ | ---- | --------------- | -------- | --------------------------------------------------------------------------------------------- | | `entity` | body | string | — | Entity narrows the diff to what was asserted about one entity. | | `from` | body | string | — | From is the earlier instant of the world, RFC 3339. | | `from_known` | body | string | — | FromKnown is how much this plane had heard at the baseline, RFC 3339. | | `limit` | body | integer (int64) | — | Limit caps how many (entity, relation) pairs are examined, in key order. | | `to` | body | string | — | To is the later instant of the world, RFC 3339, and may not precede From. | | `to_known` | body | string | — | ToKnown is how much it had heard at the later point, RFC 3339, and may not precede FromKnown. | ## Response | Status | Body | Meaning | | --------- | ------------------ | ------- | | `200` | graph.graphDiffOut | ok | | `default` | problem-details | refused | `200` body — 78 fields. | Field | In | Type | Always | Description | | ----------------------------- | ---- | -------------------- | ------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `asserted` | body | graph.wireFact\[] | — | Asserted is each statement holding at To that did not at From. | | `asserted[].at` | body | string | — | At is when the thing was so, RFC 3339, as the asserter gave it. | | `asserted[].by` | body | string | — | By is the identity that filed it — `owner` or `owner/user` — stamped from the validated principal at the write, never from the body. | | `asserted[].confidence` | body | number (double) | — | Confidence in \[0,1] as the asserter gave it; absent is 0. | | `asserted[].entity` | body | string | — | Entity is the thing described, in the organization's own namespace. | | `asserted[].evidence` | body | string | — | Evidence points at the record the claim came from. | | `asserted[].id` | body | string | — | ID is the assertion's content address, minted by the server from what was asserted. | | `asserted[].knowable` | body | string | — | Knowable is the first instant this plane could have answered with the assertion, RFC 3339: the later of Seen and the server's clock at the write. | | `asserted[].names` | body | boolean | — | Names true means the assertion is an edge and Value is an entity. | | `asserted[].relation` | body | string | — | Relation is what was asserted of it. | | `asserted[].seen` | body | string | — | Seen is when the asserter says it became knowable, RFC 3339. | | `asserted[].source` | body | string | — | Source names who asserted, as the caller gave it. | | `asserted[].until` | body | string | — | Until is when the thing stopped being so, RFC 3339, as the asserter gave it. | | `asserted[].value` | body | string | — | Value is what the relation points at: another entity's key when Names is true, otherwise a scalar. | | `bound` | body | integer (int64) | — | Bound is how many pairs this diff examined at most. | | `from` | body | string | — | From is the earlier instant, RFC 3339, echoed. | | `from_known` | body | string | — | FromKnown is the knowledge instant of the baseline, RFC 3339. | | `retracted` | body | graph.graphChange\[] | — | Retracted is each statement that held at From and no longer does at To, with what ended it as Now: the retraction, the later value, or the statement itself when its own until did. | | `retracted[].now` | body | graph.wireFact | — | | | `retracted[].now.at` | body | string | — | At is when the thing was so, RFC 3339, as the asserter gave it. | | `retracted[].now.by` | body | string | — | By is the identity that filed it — `owner` or `owner/user` — stamped from the validated principal at the write, never from the body. | | `retracted[].now.confidence` | body | number (double) | — | Confidence in \[0,1] as the asserter gave it; absent is 0. | | `retracted[].now.entity` | body | string | — | Entity is the thing described, in the organization's own namespace. | | `retracted[].now.evidence` | body | string | — | Evidence points at the record the claim came from. | | `retracted[].now.id` | body | string | — | ID is the assertion's content address, minted by the server from what was asserted. | | `retracted[].now.knowable` | body | string | — | Knowable is the first instant this plane could have answered with the assertion, RFC 3339: the later of Seen and the server's clock at the write. | | `retracted[].now.names` | body | boolean | — | Names true means the assertion is an edge and Value is an entity. | | `retracted[].now.relation` | body | string | — | Relation is what was asserted of it. | | `retracted[].now.seen` | body | string | — | Seen is when the asserter says it became knowable, RFC 3339. | | `retracted[].now.source` | body | string | — | Source names who asserted, as the caller gave it. | | `retracted[].now.until` | body | string | — | Until is when the thing stopped being so, RFC 3339, as the asserter gave it. | | `retracted[].now.value` | body | string | — | Value is what the relation points at: another entity's key when Names is true, otherwise a scalar. | | `retracted[].was` | body | graph.wireFact | — | | | `retracted[].was.at` | body | string | — | At is when the thing was so, RFC 3339, as the asserter gave it. | | `retracted[].was.by` | body | string | — | By is the identity that filed it — `owner` or `owner/user` — stamped from the validated principal at the write, never from the body. | | `retracted[].was.confidence` | body | number (double) | — | Confidence in \[0,1] as the asserter gave it; absent is 0. | | `retracted[].was.entity` | body | string | — | Entity is the thing described, in the organization's own namespace. | | `retracted[].was.evidence` | body | string | — | Evidence points at the record the claim came from. | | `retracted[].was.id` | body | string | — | ID is the assertion's content address, minted by the server from what was asserted. | | `retracted[].was.knowable` | body | string | — | Knowable is the first instant this plane could have answered with the assertion, RFC 3339: the later of Seen and the server's clock at the write. | | `retracted[].was.names` | body | boolean | — | Names true means the assertion is an edge and Value is an entity. | | `retracted[].was.relation` | body | string | — | Relation is what was asserted of it. | | `retracted[].was.seen` | body | string | — | Seen is when the asserter says it became knowable, RFC 3339. | | `retracted[].was.source` | body | string | — | Source names who asserted, as the caller gave it. | | `retracted[].was.until` | body | string | — | Until is when the thing stopped being so, RFC 3339, as the asserter gave it. | | `retracted[].was.value` | body | string | — | Value is what the relation points at: another entity's key when Names is true, otherwise a scalar. | | `superseded` | body | graph.graphChange\[] | — | Superseded is each property whose value at From was replaced by a different one at To, once per pair however many came in between. | | `superseded[].now` | body | graph.wireFact | — | | | `superseded[].now.at` | body | string | — | At is when the thing was so, RFC 3339, as the asserter gave it. | | `superseded[].now.by` | body | string | — | By is the identity that filed it — `owner` or `owner/user` — stamped from the validated principal at the write, never from the body. | | `superseded[].now.confidence` | body | number (double) | — | Confidence in \[0,1] as the asserter gave it; absent is 0. | | `superseded[].now.entity` | body | string | — | Entity is the thing described, in the organization's own namespace. | | `superseded[].now.evidence` | body | string | — | Evidence points at the record the claim came from. | | `superseded[].now.id` | body | string | — | ID is the assertion's content address, minted by the server from what was asserted. | | `superseded[].now.knowable` | body | string | — | Knowable is the first instant this plane could have answered with the assertion, RFC 3339: the later of Seen and the server's clock at the write. | | `superseded[].now.names` | body | boolean | — | Names true means the assertion is an edge and Value is an entity. | | `superseded[].now.relation` | body | string | — | Relation is what was asserted of it. | | `superseded[].now.seen` | body | string | — | Seen is when the asserter says it became knowable, RFC 3339. | | `superseded[].now.source` | body | string | — | Source names who asserted, as the caller gave it. | | `superseded[].now.until` | body | string | — | Until is when the thing stopped being so, RFC 3339, as the asserter gave it. | | `superseded[].now.value` | body | string | — | Value is what the relation points at: another entity's key when Names is true, otherwise a scalar. | | `superseded[].was` | body | graph.wireFact | — | | | `superseded[].was.at` | body | string | — | At is when the thing was so, RFC 3339, as the asserter gave it. | | `superseded[].was.by` | body | string | — | By is the identity that filed it — `owner` or `owner/user` — stamped from the validated principal at the write, never from the body. | | `superseded[].was.confidence` | body | number (double) | — | Confidence in \[0,1] as the asserter gave it; absent is 0. | | `superseded[].was.entity` | body | string | — | Entity is the thing described, in the organization's own namespace. | | `superseded[].was.evidence` | body | string | — | Evidence points at the record the claim came from. | | `superseded[].was.id` | body | string | — | ID is the assertion's content address, minted by the server from what was asserted. | | `superseded[].was.knowable` | body | string | — | Knowable is the first instant this plane could have answered with the assertion, RFC 3339: the later of Seen and the server's clock at the write. | | `superseded[].was.names` | body | boolean | — | Names true means the assertion is an edge and Value is an entity. | | `superseded[].was.relation` | body | string | — | Relation is what was asserted of it. | | `superseded[].was.seen` | body | string | — | Seen is when the asserter says it became knowable, RFC 3339. | | `superseded[].was.source` | body | string | — | Source names who asserted, as the caller gave it. | | `superseded[].was.until` | body | string | — | Until is when the thing stopped being so, RFC 3339, as the asserter gave it. | | `superseded[].was.value` | body | string | — | Value is what the relation points at: another entity's key when Names is true, otherwise a scalar. | | `to` | body | string | — | To is the later instant, RFC 3339: the one asked for, or the server's clock when none was. | | `to_known` | body | string | — | ToKnown is the knowledge instant of the later point, RFC 3339. | | `truncated` | body | boolean | — | Truncated says more pairs gathered assertions in the interval than Bound, or that one pair holds more than a single read returns. | Failure carries the platform error shape — see [Errors](https://docs.hanzo.ai/docs/errors). ## Examples **CLI** ```bash hanzo graph diff ``` **SDK** **.ts** ```ts import { Configuration, GraphApi } from 'hanzoai'; const api = new GraphApi(new Configuration({ accessToken: process.env.HANZO_API_KEY })); const { data } = await api.graphDiff({ entity: "", from: "" }); ``` **.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_diff(entity="", from="") ``` **.go** ```go cfg := hanzoai.NewConfiguration() cfg.AddDefaultHeader("Authorization", "Bearer "+os.Getenv("HANZO_API_KEY")) client := hanzoai.NewAPIClient(cfg) resp, _, err := client.GraphAPI.GraphDiff(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_diff(&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).graphDiff(); ``` **HTTP** ```bash curl -X POST https://api.hanzo.ai/v1/graph/diff \ -H "Authorization: Bearer $HANZO_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "entity": "", "from": "" }' ``` **MCP** Tool `graph`, op `graphDiff` — 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": "graphDiff", "input": { "entity": "", "from": "" } } } }' ``` --- [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)