Create documents

Renders a document from a template and the caller's own merge data, seals it in the org's store, and returns it with its rendered body.

POST /v1/legal/documents

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Address	`https://api.hanzo.ai/v1/legal/documents`
Method	`POST`
Operation	`post_legal_documents`
Auth	`Authorization: Bearer $HANZO_API_KEY`

Renders a document from a template and the caller's own merge data, seals it in the org's store, and returns it with its rendered body.

The render is PURE and deterministic — no clock, no I/O — so the same template version and the same data always produce identical bytes, which is what makes a generated contract reproducible. It fails CLOSED on a missing merge field: there is no blank-filled contract, only a 400 naming the fields that were absent. When the template is counsel-review the rendered body opens with the counsel notice, which no caller can suppress.

The document is a DRAFT. Hanzo Legal manages documents; it does not give legal advice and does not determine that a document is valid or sufficient.

Request

3 fields, body application/json (required).

Field	In	Type	Required	Description
`data`	body	object	—	Data supplies every merge field the template declares, keyed by field key.
`data.*`	body	string	—
`templateId`	body	string	—	TemplateID is the template to render.

Response

Status	Body	Meaning
`201`	legal.documentReply	created
`default`	problem-details	refused

201 body — 14 fields.

Field	In	Type	Always	Description
`disclaimer`	body	string	—	Disclaimer is the boundary made visible on the wire.
`document`	body	legal.documentView	—
`document.body`	body	string	—	Body is the rendered document.
`document.category`	body	string	—
`document.contentType`	body	string	—	ContentType is the rendered body's media type — text/markdown.
`document.createdAt`	body	integer (int64)	—
`document.esignProvider`	body	string	—
`document.id`	body	string	—
`document.signedAt`	body	integer (int64)	—
`document.status`	body	string	—
`document.templateId`	body	string	—
`document.templateVersion`	body	integer (int64)	—
`document.title`	body	string	—
`document.updatedAt`	body	integer (int64)	—

Failure carries the platform error shape — see Errors.

Examples

CLI

SDK

HTTP

MCP

hanzo legal documents create

.ts

.py

.go

.rs

.java

import { Configuration, LegalApi } from 'hanzoai';

const api = new LegalApi(new Configuration({ accessToken: process.env.HANZO_API_KEY }));
const { data } = await api.postLegalDocuments({ data: {}, templateId: "<templateId>" });

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

client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"]))
result = LegalApi(client).post_legal_documents(data={}, template_id="<templateId>")

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

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

use hanzo_client::apis::{configuration::Configuration, legal_api};

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

let result = legal_api::post_legal_documents(&cfg, Default::default()).await?;

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

ApiClient client = new ApiClient();
client.setBearerToken(System.getenv("HANZO_API_KEY"));

var result = new LegalApi(client).postLegalDocuments();

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

MCP reaches legal through the legal 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:

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_legal_documents"
         }
       }
     }'

Legal API · All Hanzo APIs · Interactive reference

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