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REST API ​

Your software can create templates and start documents from them, send them for signature, send intake links, and follow what happens. A key works in the one workspace it was made in; GET /workspace says which.

Base URLhttps://tryjustdocs.com/api/v1
AuthenticationAuthorization: Bearer <key>. Use an agent key (any plan) or an API key (Teams & Platform) from the workspace's API & agents page. See Keys.
FormatJSON in and out, UTF-8. Send Content-Type: application/json with a body.
DescriptionOpenAPI 3.1 at https://tryjustdocs.com/openapi.json
PlanAgent keys on every plan. API keys on Teams & Platform

A first call ​

bash
curl https://tryjustdocs.com/api/v1/templates \
  -H "Authorization: Bearer $JUSTDOCS_API_KEY"
js
const response = await fetch("https://tryjustdocs.com/api/v1/templates", {
  headers: { Authorization: `Bearer ${process.env.JUSTDOCS_API_KEY}` },
});
const { templates, next_cursor } = await response.json();
python
import os
import requests

response = requests.get(
    "https://tryjustdocs.com/api/v1/templates",
    headers={"Authorization": f"Bearer {os.environ['JUSTDOCS_API_KEY']}"},
    timeout=30,
)
templates = response.json()["templates"]

Operations ​

TemplatesList · Get
DocumentsStart from a template · Get
Signing requestsCreate · List · Get · Send · Void
Intake linksSend · Get
ApprovalsGet

Each operation has the same name as an MCP tool, and the same rules.

Conventions ​

  • Ids are UUIDs. Times are ISO 8601 in UTC, such as 2026-11-03T16:20:00.000Z.
  • Unknown fields are refused with 400, so a typo can't be silently ignored.
  • Create and send calls take an Idempotency-Key, so a retry never sends twice.
  • Lists return a page and a next_cursor.
  • Errors are JSON with a message that says what to do. See Errors and rate limits.
  • 202 Accepted means a person needs to approve the send first.
  • Voiding takes effect at once, even with keys whose sends need approval. It can only cancel.

Using OpenAPI ​

Point your tools at https://tryjustdocs.com/openapi.json to generate a client, import into an API client, or give an assistant the full description. Every operationId is the name of the matching MCP tool.

Next ​