Sellsy API

Name: Sellsy API
Brand: Sellsy API
Availability: InStock

✓ Official Vendor SpecCommunicationsEmail Deliveryoauth2351 EndpointsREST

For Agents

Programmatically create a comment, comments list. Covers 351 operations with oauth2 authentication.

Use for: I need to a comment, I want to comments list, Search for comment details, Find all a comment

Not supported: Does not handle payments, crm, or developer tools - use for communications only.

Find out the [Postman collections](dist/postman/CollectionsApiV2.json) with the required [environment variables](dist/postman/Environment.json) Find out the [Changelog](changelog.html) Errors The errors are returned in JSON with the following format: The `details` field can contain an object that details the error. It is used in particular during validation to return the invalid fields | HTTP Code. The API exposes 351 endpoints secured with oauth2 authentication.

Jentic One on Github View OpenAPI Document

Install Jentic One Beta

Connect the Sellsy API to your agent

Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the Sellsy 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.

Step 1: Jentic One Host machine

# On the machine that will host your Jentic One instance:
curl -fsSL "https://jentic.com/install.sh?src=apis&api=%2Fapis%2Fsellsy.com%2Fsellsy" | sh

Step 2: Agent machine

# On the machine where your agent runs (keep this separate from the instance):
curl -fsSL "https://jentic.com/install.sh?src=apis&api=%2Fapis%2Fsellsy.com%2Fsellsy" | sh
jentic register       # connects your agent to your Jentic One instance

Jentic 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 Sellsy API.

Create a comment

Comments List

Get comment details

Update a comment

Delete a comment

GET STARTED

Start building with Sellsy API

Explore with Jentic One

View OpenAPI Document

Use Cases

Patterns agents use Sellsy API for, with concrete tasks.

★ Communications Operations

Use the Sellsy API to perform communications operations programmatically. The API provides 351 endpoints covering core functionality including create a comment, comments list, get comment details.

Call POST /comments to create a comment

Automated Invoices Management

Automate invoices operations by combining multiple Sellsy API endpoints. Agents can comments list and then get comment details in a single workflow.

Call GET /comments to comments list, then verify the result

AI Agent Integration via Jentic

AI agents discover and call Sellsy API endpoints through Jentic without managing credentials directly. An agent searches for the required operation by intent, receives the matching endpoint schema, and executes the call with Jentic-managed authentication. This eliminates the need to read API documentation or handle oauth2 tokens manually.

Search Jentic for 'create a comment', load the operation schema, and execute with Jentic-managed credentials

Key Endpoints

351 endpoints — find out the [postman collections](dist/postman/collectionsapiv2.

METHOD

PATH

DESCRIPTION

POST

/comments

Create a comment

GET

/comments

Comments List

GET

/comments/{id}

Get comment details

PUT

/comments/{id}

Update a comment

DELETE

/comments/{id}

Delete a comment

POST

/comments/search

Search comments

POST

/companies

Create a company

GET

/companies

Companies List

POST

/comments

Create a comment

GET

/comments

Comments List

GET

/comments/{id}

Get comment details

PUT

/comments/{id}

Update a comment

DELETE

/comments/{id}

Delete a comment

POST

/comments/search

Search comments

POST

/companies

Create a company

GET

/companies

Companies List

Why Jentic?

What agents get from Jentic-routed access to this vendor.

Setup

Wiring the Sellsy API by hand means running its OAuth2 flow, choosing between the authorization-code and client-credentials grants, refreshing tokens, and building each request across a large surface yourself. Through Jentic you install once, import Sellsy from the API Directory, store the OAuth credentials once, and your agent calls it.

Permission scoping

The Sellsy API puts the comment and company ids in the URL path (/comments/{id} and /companies/{id}), so a rule can pin your agent to one comment: it can read and update that comment and nothing else. You choose the operations it may call, so destructive ones like deleting a comment are not included unless you add them.

Credential isolation

Your Sellsy OAuth credentials are stored once, encrypted, by your own Jentic One instance and injected at execution time. They never enter the agent's prompt, logs, or context.

Intent-based discovery

Agents search Jentic by intent such as 'create a comment' or 'search companies', and Jentic returns the matching Sellsy operation with its input schema so the agent calls the right endpoint without browsing the reference docs.

FAQs

Specific to using Sellsy API through Jentic.

What authentication does the Sellsy API use?

The Sellsy API uses OAuth 2.0 for authorization. Through Jentic, these credentials are stored encrypted in your Jentic One instance and injected at execution time, so raw secrets never enter the agent context.

Can I create a comment with the Sellsy API?

Yes. Use the POST /comments endpoint. The API returns structured JSON responses that agents can parse and act on directly.

What are the rate limits for the Sellsy API?

Rate limits are not specified in the OpenAPI spec. Check the vendor documentation for current limits. Through Jentic, rate limiting is handled automatically with retry logic built into the execution layer.

How do I create a comment through Jentic?

Install the Jentic SDK with pip install jentic, authenticate through Jentic One, the self-hosted execution layer, then search for 'create a comment'. Jentic returns the matching Sellsy API operation with its input schema. Load the schema and execute the call - credentials are injected automatically.

How many endpoints does the Sellsy API have?

The Sellsy API exposes 351 endpoints covering invoices, opportunities, credit notes operations.

Can I limit what my agent is allowed to do with the Sellsy API?

Yes. Because you run Jentic One yourself, your own rules decide which Sellsy operations and OAuth credentials the agent may use. Since the Sellsy API carries the comment and company ids in the URL path, such as /comments/{id} and /companies/{id}, a rule can pin the agent to a single comment or company so it only reads and updates that record. You also choose exactly which operations are exposed, so destructive calls like DELETE /comments/{id} stay unavailable unless you add them.

Sellsy API

Connect the Sellsy API to your agent

Capabilities

Start building with Sellsy API

Use Cases

Key Endpoints

Why Jentic?

Related APIs

FAQs