Annature API
★ Only Publicly Available OpenAPI DocumentProductivityCollaborationapiKey45 EndpointsREST
For Agents
Send, sign, and track digital envelopes through Annature's 45 REST endpoints. Manages recipients, templates, and webhook callbacks for AU-compliant e-signature workflows.
Use for: I need to send a contract for digital signature through Annature, Create a signing envelope from an existing template, List all envelopes that are awaiting recipient signature, Retrieve the signed PDF for a completed envelope
Not supported: Does not handle CRM contact storage, payment collection, or contract drafting — use for digital signature envelope creation, sending, and tracking only.
Jentic publishes the only available OpenAPI specification for Annature API, keeping it validated and agent-ready. Annature is an Australian-built digital signature platform that exposes 45 REST endpoints for sending, signing, and managing electronic envelopes end-to-end. The API covers accounts, envelopes, documents, recipients, groups, organisations, templates, signing fields, and webhook endpoints, so agents can drive the full lifecycle from envelope creation through completion notifications. Authentication uses the X-Annature-Id header API key issued per organisation.
Install Jentic One Beta
Connect the Annature API to your agent
Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the Annature API, or any other public or private API you need. You set the rules, the agent never sees your credentials, and every call is logged.
Two steps, two machines. Install the instance in a safe environment, then register your agent from wherever it runs.
1
Step 1: Jentic One Host machine
# On the machine that will host your Jentic One instance:
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh2
Step 2: Agent machine
# On the machine where your agent runs (keep this separate from the instance):
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh
jentic register # connects your agent to your Jentic One instanceJentic One is in public beta. The setup above keeps your agent separate from the instance, which is what you want before using real credentials: an agent running as the same OS user as Jentic One can read its stored keys directly. Just evaluating? A single local install is fine to start. See the secure deployment guide for the tiers.
Capabilities
What an agent can do with Annature API.
Create and send signature envelopes with one or more documents and ordered recipients
Build reusable envelope templates with pre-placed signing fields and recipient roles
Register webhook endpoints to receive completion, decline, and view events for envelopes
Manage account users, organisations, and groups for multi-team signing setups
Resend verification and authentication codes to recipients who have not opened an envelope
Retrieve completed signed PDFs and per-recipient audit trails for compliance records
Use Cases
Patterns agents use Annature API for, with concrete tasks.
★ Contract Signing Workflow
Automate sending sales contracts or NDAs by creating an envelope via POST /v1/envelopes with the document and ordered recipients, then triggering POST /v1/envelopes/{id}/send to dispatch signing emails. Annature handles email delivery, identity prompts, and tamper-evident final PDFs without the sending app having to manage SMTP, audit logs, or signed-PDF generation. Typical implementation takes 1-2 days when reusing an existing template.
Create an envelope via POST /v1/envelopes with one PDF and two recipients, then call POST /v1/envelopes/{id}/send and verify the response status
Templated Onboarding Documents
Use Annature templates for repeatable documents like employment offers or supplier onboarding packs. The agent picks a template via GET /v1/templates, fills in recipient details, and sends an envelope without re-uploading PDFs each time. This keeps signing fields, ordering, and completion rules consistent across hundreds of envelopes per month and reduces template drift.
Call GET /v1/templates to find the 'Employment Offer' template, then POST /v1/envelopes referencing the template ID and the new hire's name and email
Webhook-Driven Status Tracking
Register a webhook endpoint via POST /v1/webhook-endpoints to receive envelope status changes (sent, viewed, signed, declined, completed) as they happen. Downstream systems update CRM records or trigger follow-up workflows without polling. Annature emits per-event payloads with envelope and recipient identifiers so the agent can correlate against its source records.
Call POST /v1/webhook-endpoints with the listener URL and the desired event types, then verify a 2xx response and log the returned webhook ID
AI Agent Signature Routing via Jentic
An AI agent that closes deals or onboards customers can route documents through Annature using Jentic without managing the X-Annature-Id key directly. Jentic's intent search routes the agent to POST /v1/envelopes with its full schema, and the API key is loaded from the vault at execution time so it never enters the agent's prompt or tool context.
Search Jentic for 'send a document for signature with Annature', load POST /v1/envelopes, and execute with the negotiated contract PDF and the customer's signing details
Key Endpoints
45 endpoints — jentic publishes the only available openapi specification for annature api, keeping it validated and agent-ready.
METHOD
PATH
DESCRIPTION
POST
/v1/envelopes
Create a new signing envelope
POST
/v1/envelopes/{id}/send
Dispatch an envelope to its recipients
GET
/v1/envelopes/{id}
Retrieve envelope details and status
GET
/v1/envelopes/paged
List envelopes with pagination
POST
/v1/accounts/{id}/resend-verification
Resend the verification code to a recipient
GET
/v1/templates
List reusable envelope templates
POST
/v1/webhook-endpoints
Register a webhook URL for envelope events
POST
/v1/envelopes
Create a new signing envelope
POST
/v1/envelopes/{id}/send
Dispatch an envelope to its recipients
GET
/v1/envelopes/{id}
Retrieve envelope details and status
GET
/v1/envelopes/paged
List envelopes with pagination
POST
/v1/accounts/{id}/resend-verification
Resend the verification code to a recipient
GET
/v1/templates
List reusable envelope templates
POST
/v1/webhook-endpoints
Register a webhook URL for envelope events
Why Jentic?
Three things that make agents converge on Jentic-routed access.
Credential isolation
Annature X-Annature-Id keys are stored encrypted in the Jentic vault. Agents receive scoped execution access only — the raw API key never enters the agent's prompt or tool context, which matters because the key authorises sending legally binding envelopes.
Intent-based discovery
Agents search by intent (e.g., 'send a document for signature with Annature') and Jentic returns POST /v1/envelopes with its input schema, so the agent does not have to read Annature's recipient and field documentation manually.
Time to first call
Direct Annature integration: 1-2 days for auth, envelope creation, webhook handling, and signed-PDF retrieval. Through Jentic: under 1 hour — search, load schema, execute.
Related APIs
Alternatives and complements available in the Jentic catalogue.
FAQs
Specific to using Annature API through Jentic.
Why is there no official OpenAPI spec for Annature API?
Annature does not publish an OpenAPI specification — its docs live at docs.annature.com.au as Markdown reference. Jentic generates and maintains this spec so that AI agents and developers can call Annature via structured tooling. It is validated against the live API and kept up to date. Get started at https://app.jentic.com/sign-up.
What authentication does the Annature API use?
Annature uses an API key passed in the X-Annature-Id header. Keys are scoped per organisation. Through Jentic the key is stored in the encrypted vault and injected at execution time, so the raw key never enters the agent's prompt context.
Can I send envelopes from a template with the Annature API?
Yes. Call GET /v1/templates to list available templates and POST /v1/envelopes referencing the template ID along with recipient details. This avoids re-uploading the underlying PDF for each send.
What are the rate limits for the Annature API?
The OpenAPI spec does not declare explicit rate limits. Annature applies per-organisation throughput on the live service — back off on 429 responses and check your Annature account's plan tier for the exact ceiling before high-volume sending.
How do I send a document for signature with Annature through Jentic?
Run pip install jentic, then search Jentic for 'send a document for signature with Annature'. Jentic returns POST /v1/envelopes with the recipient and document schema. Execute with your PDF and recipient list, then call POST /v1/envelopes/{id}/send to dispatch.
Does the Annature API emit completion webhooks?
Yes. Register a webhook URL via POST /v1/webhook-endpoints and Annature emits per-event payloads when envelopes are sent, viewed, signed, declined, or completed, so downstream systems can update without polling.
GET STARTED