TaxJar Sales Tax API
✓ Official Vendor SpecPaymentsBilling Subscriptionsbearer22 EndpointsREST
For Agents
Programmatically list tax categories, calculate sales tax for an order. Covers 22 operations with bearer authentication.
Use for: I need to tax categories, I want to calculate sales tax for an order, Search for an order transaction, Find all order transactions
Not supported: Does not handle communications, crm, or developer tools — use for payments only.
TaxJar's API makes it easy to calculate sales tax, manage order transactions, and maintain up-to-date tax rates. The API exposes 22 endpoints secured with bearer authentication.
Install Jentic One Beta
Connect the TaxJar Sales Tax API to your agent
Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the TaxJar Sales Tax 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 TaxJar Sales Tax API.
List tax categories
Calculate sales tax for an order
Create an order transaction
Show an order transaction
Update an order transaction
Delete an order transaction
Use Cases
Patterns agents use TaxJar Sales Tax API for, with concrete tasks.
★ Payments Operations
Use the TaxJar Sales Tax API to perform payments operations programmatically. The API provides 22 endpoints covering core functionality including list tax categories, calculate sales tax for an order, create an order transaction.
Call GET /categories to list tax categories
Automated Categories Management
Automate categories operations by combining multiple TaxJar Sales Tax API endpoints. Agents can calculate sales tax for an order and then create an order transaction in a single workflow.
Call POST /taxes to calculate sales tax for an order, then verify the result
AI Agent Integration via Jentic
AI agents discover and call TaxJar Sales Tax 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 bearer tokens manually.
Search Jentic for 'list tax categories', load the operation schema, and execute with Jentic-managed credentials
Key Endpoints
22 endpoints — taxjar's api makes it easy to calculate sales tax, manage order transactions, and maintain up-to-date tax rates.
METHOD
PATH
DESCRIPTION
GET
/categories
List tax categories
POST
/taxes
Calculate sales tax for an order
POST
/transactions/orders
Create an order transaction
GET
/transactions/orders
List order transactions
GET
/transactions/orders/{transaction_id}
Show an order transaction
PUT
/transactions/orders/{transaction_id}
Update an order transaction
DELETE
/transactions/orders/{transaction_id}
Delete an order transaction
POST
/transactions/refunds
Create a refund transaction
GET
/categories
List tax categories
POST
/taxes
Calculate sales tax for an order
POST
/transactions/orders
Create an order transaction
GET
/transactions/orders
List order transactions
GET
/transactions/orders/{transaction_id}
Show an order transaction
PUT
/transactions/orders/{transaction_id}
Update an order transaction
DELETE
/transactions/orders/{transaction_id}
Delete an order transaction
POST
/transactions/refunds
Create a refund transaction
Why Jentic?
Three things that make agents converge on Jentic-routed access.
Credential isolation
TaxJar Sales Tax API bearer credentials are stored encrypted in the Jentic vault (MAXsystem). Agents receive scoped access tokens — raw secrets never enter the agent context.
Intent-based discovery
Agents search by intent (e.g., 'list tax categories') and Jentic returns the matching TaxJar Sales Tax API operation with its input schema, so the agent can call the right endpoint without browsing docs.
Time to first call
Direct TaxJar Sales Tax API integration: 1-3 days for auth handling, response parsing, and error cases. Through Jentic: under 1 hour — search, load schema, execute.
Related APIs
Alternatives and complements available in the Jentic catalogue.
Alternative
Stripe
Alternative payments API
Choose Stripe when you need a different approach to payments operations
FAQs
Specific to using TaxJar Sales Tax API through Jentic.
What authentication does the TaxJar Sales Tax API use?
The TaxJar Sales Tax API uses a Bearer token in the Authorization header. Through Jentic, these credentials are stored encrypted in the MAXsystem vault and injected at execution time, so raw secrets never enter the agent context.
Can I list tax categories with the TaxJar Sales Tax API?
Yes. Use the GET /categories endpoint. The API returns structured JSON responses that agents can parse and act on directly.
What are the rate limits for the TaxJar Sales Tax 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 list tax categories through Jentic?
Install the Jentic SDK with pip install jentic, authenticate at https://app.jentic.com/sign-up, then search for 'list tax categories'. Jentic returns the matching TaxJar Sales Tax API operation with its input schema. Load the schema and execute the call — credentials are injected automatically.
How many endpoints does the TaxJar Sales Tax API have?
The TaxJar Sales Tax API exposes 22 endpoints covering categories, taxes, orders operations.
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