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Connectors · Accounting & finance

TaxJar MCP server for AI agents.

actionlake is an MCP gateway: one remote MCP server that connects Claude and other MCP clients to TaxJar and the rest of your systems. It gives your agent 21 TaxJar actions (12 reads, 6 writes and 3 that wait for a confirmation) and holds the TaxJar credential itself, so the agent never does. It paces TaxJar's limits and records every call.

Connect TaxJar freeSee pricing

100,000 free calls a month. No card, no email, no password: press Start a free sandbox on the next screen and keep the key it shows you.

claude mcp add --transport http actionlake https://connect.actionlake.com/mcp
the first call
do {  action: "taxjar.orders.list",  intent: "check which TaxJar account is connected"}# List order transactions · read · 1 upstream call
  • 21actionsin one signed file
  • 12readlook, never change
  • 6writecreate and update
  • 3wait for a yesdestructive, confirmed first

Set up

Connect TaxJar in three steps.

  1. 01

    Add actionlake to Claude.

    Run the command once in Claude Code; its consent page can create a free sandbox: 100,000 calls a month, no card. In the Claude app, add a custom connector with the URL below and paste your key on the consent page. Creating a new sandbox from the Claude app is not yet tested by us.

    https://connect.actionlake.com/mcp
  2. 02

    Connect TaxJar.

    Bearer token. No consent screen: your agent can connect it for you, but the key then passes through your chat. To keep it out of the model's context, paste it in the console instead. actionlake stores what you paste write-only, sealed under your tenant's key.

    • access_tokenTaxJar API token
    • modeYour TaxJar mode
    account { op: "connections.requirements", service: "taxjar" }
# free: exactly what to paste, and what is found for you
  3. 03

    Make the first call. Check before a write.

    Ask in plain words; Claude picks the action. Before anything changes, check validates the call and prices it, for free.

    do    { action: "taxjar.orders.list" }# list order transactions · read · 1 upstream callcheck { action: "taxjar.orders.create", input: { … } }# free: inputs, permissions, cost and confirmations, nothing sent

TaxJar at a glance

Sign-in
Bearer token. No consent screen: your agent can connect it for you, but the key then passes through your chat. To keep it out of the model's context, paste it in the console instead.
You provide
access_token
Setup fields
mode
Limits we pace to
10,000 calls a minute, per connection
API covered
TaxJar SmartCalcs API v2 (x-api-version 2022-01-24), at your region's taxjar.com address, set when you connect
Built from
TaxJar's documentation, read 23 October 2026developers.taxjar.com
Service file
Version 1.0.0, signed (Ed25519)
Cached reads
12 of 12 reads, for up to 5 minutes; a write clears what it affects
Shared entities
3, so ask can line TaxJar up with your other systems
Data
Processed and stored in Sydney, Australia. No US region yet

Capabilities

What an AI agent can do in TaxJar.

21 actions in 9 areas. Every one carries its effect, so a key can allow the reads and hold the rest.

  • 12readlook, never change
  • 6writecreate and update
  • 3destructivewait for a confirmation

  1. Customers

    5

    2 read · 2 write · 1 destructive

    Show a customer · List customers · Create a customer · Update a customer

  2. Orders

    5

    2 read · 2 write · 1 destructive

    Show an order transaction · List order transactions · Create an order transaction · Update an order transaction

  3. Refunds

    5

    2 read · 2 write · 1 destructive

    Show a refund transaction · List refund transactions · Create a refund transaction · Update a refund transaction

  4. Addresses

    1

    1 read · 0 write · 0 destructive

    Validate an address

  5. Categories

    1

    1 read · 0 write · 0 destructive

    List tax categories

  6. Nexus regions

    1

    1 read · 0 write · 0 destructive

    List nexus regions

  7. Rates

    1

    1 read · 0 write · 0 destructive

    Show tax rates for a location

  8. Summary rates

    1

    1 read · 0 write · 0 destructive

    Summarize tax rates for all regions

1 more area · 1 actions
  • Taxes 1

Top actions

The TaxJar API, shaped for agents.

The ids your agent types, what each does, and the one name it shares with other systems. 18 of TaxJar's 18 action names are shared with at least one other connector, so an agent learns them once.

ActionWhat it doesEffectSame name in
taxjar.orders.getShow an order transactionShow an order transaction.readcommerce.order.get87 connectors
taxjar.customers.getShow a customerShow a customer.readcommerce.customer.get45 connectors
taxjar.orders.listList order transactionsList order transactions.readcommerce.order.list82 connectors
taxjar.orders.createCreate an order transactionCreate an order transaction.writecommerce.order.create67 connectors
taxjar.customers.listList customersList customers.readcommerce.customer.list45 connectors
taxjar.customers.createCreate a customerCreate a customer.writecommerce.customer.create43 connectors
taxjar.orders.updateUpdate an order transactionUpdate an order transaction.writecommerce.order.update58 connectors
taxjar.refunds.getShow a refund transactionShow a refund transaction.readfinance.refund.get25 connectors
taxjar.orders.deleteDelete an order transactionDelete an order transaction.destructivecommerce.order.delete39 connectors
taxjar.refunds.listList refund transactionsList refund transactions.readfinance.refund.list23 connectors
taxjar.rates.getShow tax rates for a locationShow tax rates for a location.readfinance.tax_rate.get32 connectors
taxjar.nexus_regions.listList nexus regionsList nexus regions.readfinance.tax_registration.list6 connectors

Try it

Prompts to paste into Claude.

Each one names the TaxJar actions it will call, so you know what it reads and what it changes before you send it.

  1. Readread

    Which TaxJar orders from the last seven days are still unfulfilled?

    callstaxjar.orders.get

  2. Writewrite

    Create an order transaction in TaxJar. Show me exactly what you will send before you save it.

    callstaxjar.orders.create

Governance for TaxJar

Destructive actions wait for a yes.

3 TaxJar actions are destructive. These are all of them:

  • Delete an order transactiontaxjar.orders.delete
  • Delete a customertaxjar.customers.delete
  • Delete a refund transactiontaxjar.refunds.delete

A destructive action runs only with confirm: true. Under the human policy the agent cannot confirm for itself: the run stops until a named person approves, in the console or from a signed link in an email. The cap on a key is refused before the call is sent, never after.

dotaxjar.orders.deleteconfirm_policy: human

Delete an order transaction?

intent: the user asked me to delete an order transaction

run suspended · waiting for a named person · key taxjar-agent cannot confirm itself
In the console, or from an emailed signed link.
a key for this connector
account {  op: "keys.create", name: "taxjar-agent",  allowed_actions: ["taxjar.*"], cap_calls: 2000,  confirm_policy: "human_for_writes",  approval_rules: [    { match: "taxjar.orders.delete", approver: "[email protected]" },    { match: "taxjar.customers.delete", approver: "[email protected]" },    { match: "taxjar.refunds.delete", approver: "[email protected]" }  ]}
Illustrative. Scoped to TaxJar only, capped at 2,000 upstream calls, every write confirmed, and the destructive ones approved by a named person.

Cost

What TaxJar costs on actionlake.

Every TaxJar action is one upstream call, the only thing actionlake bills. Searching, check, cost, account and any call TaxJar refused with 401, 403, 429 or a 5xx are free. Paid plans start at US$49 a month for 250,000 calls, with overage from US$0.30 down to US$0.18 per 1,000.

  • 1upstream call per actionall 21 TaxJar actions
  • 21actions pageeach page of a long list is one call
  • 12reads can be cacheda cache hit costs nothing
  • 100,000calls a month, freepaid plans from US$49 a month for 250,000

See pricing

Action index

Every TaxJar action.

21 actions by area: the id your agent calls, what it does, and its effect.

Customers5
  • taxjar.customers.createCreate a customerwrite
  • taxjar.customers.deleteDelete a customerdestructive
  • taxjar.customers.getShow a customerread
  • taxjar.customers.listList customersread
  • taxjar.customers.updateUpdate a customerwrite
Orders5
  • taxjar.orders.createCreate an order transactionwrite
  • taxjar.orders.deleteDelete an order transactiondestructive
  • taxjar.orders.getShow an order transactionread
  • taxjar.orders.listList order transactionsread
  • taxjar.orders.updateUpdate an order transactionwrite
Refunds5
  • taxjar.refunds.createCreate a refund transactionwrite
  • taxjar.refunds.deleteDelete a refund transactiondestructive
  • taxjar.refunds.getShow a refund transactionread
  • taxjar.refunds.listList refund transactionsread
  • taxjar.refunds.updateUpdate a refund transactionwrite
Addresses1
  • taxjar.addresses.validateValidate an addressread
Categories1
  • taxjar.categories.listList tax categoriesread
Nexus regions1
  • taxjar.nexus_regions.listList nexus regionsread
Rates1
  • taxjar.rates.getShow tax rates for a locationread
Summary rates1
  • taxjar.summary_rates.listSummarize tax rates for all regionsread
Taxes1
  • taxjar.taxes.calculateCalculate sales tax for an orderread

Questions

The TaxJar MCP server, answered.

Is there a TaxJar MCP server for Claude?

Yes. actionlake is an MCP gateway: a remote MCP server that gives Claude, or another MCP client, 21 TaxJar actions across customers, orders, refunds and addresses, through the same eight tools it uses for every other connector. actionlake is independent; it is not made or endorsed by TaxJar.

What do I need to connect TaxJar?

TaxJar API token. Plus your mode. The free call account { op: "connections.requirements", service: "taxjar" } lists exactly what to paste.

Can an AI agent delete or change things in TaxJar?

Only if its key allows it, and only with an explicit confirmation. 3 TaxJar actions are destructive, including delete an order transaction, delete a customer and delete a refund transaction. Each runs only with confirm: true. Under the human confirm policy, or an approval rule on the key, the run waits until a named person approves it.

Will an AI agent use up my TaxJar API limit?

actionlake paces every call to the limits in the TaxJar service file: 10,000 calls a minute per connection. Repeated reads are answered from cache (12 TaxJar actions can be), which never reaches TaxJar.

What does a TaxJar action cost?

One upstream call, the only unit actionlake bills. A list that pages bills one call per page (21 TaxJar actions page). Cache hits, searches, dry runs and calls TaxJar refused with 401, 403, 429 or a 5xx are free. The Free plan includes 100,000 calls a month with no card. Paid plans start at US$49 a month for 250,000 calls, with overage from US$0.30 down to US$0.18 per 1,000.

Which TaxJar API does it cover?

The TaxJar SmartCalcs API v2 (x-api-version 2022-01-24) at your region's taxjar.com address, set when you connect. It is built from TaxJar's documentation as read on 23 October 2026. 21 actions in 9 areas, each one in the signed service file (version 1.0.0).

Does actionlake keep my TaxJar data, and where?

actionlake processes and stores data in Sydney, Australia; there is no US region yet. Reads may be cached for up to 5 minutes, and a write clears the reads it affects. Each run's request and response is kept, sealed, for your plan's trace window: 1 day on Free, 3 days on Starter, 7 days on Pro, 14 days on Team, 30 days on Business and 30 days on Enterprise. Your TaxJar credential is sealed under your tenant's key, never logged and never returned. Your traffic is not used to train models.

Which AI clients can use it?

Claude Code, tested by us end to end, and the Claude app as a custom connector, tested by us with an existing key. Other MCP clients that support remote servers over Streamable HTTP (MCP revisions 2025-06-18 and 2025-11-25) and OAuth dynamic client registration, or a bearer header, should connect the same way; we have not tested them. Or plain REST, under the same action names.

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actionlake is independent. It is not made or endorsed by TaxJar; the name is the vendor's own. Counts are from the TaxJar service file, version 1.0.0.

Give your agent TaxJar today.

Connect TaxJar freeSee pricing

Start free - 100,000 calls/month, no card. No signup. Hard caps on every key. Cached answers are free.